Articles | Volume 16, issue 6
Biogeosciences, 16, 1361–1380, 2019
https://doi.org/10.5194/bg-16-1361-2019
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Biogeosciences, 16, 1361–1380, 2019
https://doi.org/10.5194/bg-16-1361-2019
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
02 Apr 2019
Research article
| 02 Apr 2019
Reduced phosphorus loads from the Loire and Vilaine rivers were accompanied by increasing eutrophication in the Vilaine Bay (south Brittany, France)
Widya Ratmaya et al.
Related authors
No articles found.
Coline Poppeschi, Guillaume Charria, Anne Daniel, Romaric Verney, Peggy Rimmelin-Maury, Michaël Retho, Eric Goberville, Emilie Grossteffan, and Martin Plus
Biogeosciences Discuss., https://doi.org/10.5194/bg-2022-86, https://doi.org/10.5194/bg-2022-86, 2022
Revised manuscript under review for BG
Short summary
Short summary
This manuscript aims to understand interannual changes in the Initiation of the Phytoplankton Growing Period (IPGP) in the current context of global climate changes over the last 20 years. An important variability in the timing of the IPGP is observed with a trend towards a later IPGP during this last decade. The role and the impact of extreme events (cold spells, floods, and wind burst) on IPGP is also detailed.
Justine Louis, Anniet M. Laverman, Emilie Jardé, Alexandrine Pannard, Marine Liotaud, Françoise Andrieux-Loyer, Gérard Gruau, Florian Caradec, Emilie Rabiller, Nathalie Lebris, and Laurent Jeanneau
Biogeosciences Discuss., https://doi.org/10.5194/bg-2021-318, https://doi.org/10.5194/bg-2021-318, 2021
Preprint withdrawn
Short summary
Short summary
This work has described the variability in sedimentary organic matter composition through a broad sampling campaign of marine mudflats at the regional scale (Brittany Region), and made the link with sediment potential biodegradability and nutrient release. In these coastal ecosystems affected by the eutrophication, the potential impact of human activities on the nutrient dynamics at the sediment-water interface was highlighted.
Raphaël Savelli, Christine Dupuy, Laurent Barillé, Astrid Lerouxel, Katell Guizien, Anne Philippe, Pierrick Bocher, Pierre Polsenaere, and Vincent Le Fouest
Biogeosciences, 15, 7243–7271, https://doi.org/10.5194/bg-15-7243-2018, https://doi.org/10.5194/bg-15-7243-2018, 2018
Short summary
Short summary
We simulate the benthic microalgae seasonal cycle on a temperate intertidal mudflat by combining a physical–biological coupled model with remotely sensed and in situ data. While optimal light and temperature conditions lead to a spring bloom, thermo-inhibition and grazing result in a summer depression of biomass. The model ability to infer mechanisms driving the seasonal cycle could open the door to the contribution of productive intertidal biofilms to the coastal carbon cycle.
Caroline Echappé, Pierre Gernez, Vona Méléder, Bruno Jesus, Bruno Cognie, Priscilla Decottignies, Koen Sabbe, and Laurent Barillé
Biogeosciences, 15, 905–918, https://doi.org/10.5194/bg-15-905-2018, https://doi.org/10.5194/bg-15-905-2018, 2018
Short summary
Short summary
Using satellite technology and a life-size experiment, we analysed the impact of oyster reefs on mats of microscopic algae that develop within coastal mudflats. We showed that the relationship between microalgae and oysters is not limited to a one-way process where microalgae are a food source to oysters, but that oysters also promote microalgae mats development, presumably by providing nutrients to them. This might yield new insights into coastal ecosystem management.
Related subject area
Biogeochemistry: Coastal Ocean
Causes of the extensive hypoxia in the Gulf of Riga in 2018
Trawling effects on biogeochemical processes are mediated by fauna in high-energy biogenic-reef-inhabited coastal sediments
Drought recorded by Ba∕Ca in coastal benthic foraminifera
A nitrate budget of the Bohai Sea based on an isotope mass balance model
Suspended particulate matter drives the spatial segregation of nitrogen turnover along the hyper-turbid Ems estuary
Benthic Alkalinity fluxes from coastal sediments of the Baltic and North Seas: Comparing approaches and identifying knowledge gaps
Marine CO2 system variability along the northeast Pacific Inside Passage determined from an Alaskan ferry
Unprecedented Summer Hypoxia in Southern Cape Cod Bay: An Ecological Response to Regional Climate Change?
Reviews and syntheses: Spatial and temporal patterns in seagrass metabolic fluxes
Mixed layer depth dominates over upwelling in regulating the seasonality of ecosystem functioning in the Peruvian upwelling system
Temporal dynamics of surface ocean carbonate chemistry in response to natural and simulated upwelling events during the 2017 coastal El Niño near Callao, Peru
Interannual variabilities, long-term trends, and regulating factors of low-oxygen conditions in the eastern Pearl River Estuary
Pelagic primary production in the coastal Mediterranean Sea: variability, trends, and contribution to basin-scale budgets
Investigating the effect of nickel concentration on phytoplankton growth to inform the assessment of ocean alkalinity enhancement
Contrasting patterns of carbon cycling and dissolved organic matter processing in two phytoplankton–bacteria communities
Biophysical controls on seasonal changes in the structure, growth, and grazing of the size-fractionated phytoplankton community in the northern South China Sea
Seasonal dispersal of fjord meltwaters as an important source of iron and manganese to coastal Antarctic phytoplankton
Modeling cyanobacteria life cycle dynamics and historical nitrogen fixation in the Baltic Proper
Simultaneous assessment of oxygen- and nitrate-based net community production in a temperate shelf sea from a single ocean glider
Reviews and syntheses: Physical and biogeochemical processes associated with upwelling in the Indian Ocean
Particulate organic carbon dynamics in the Gulf of Lion shelf (NW Mediterranean) using a coupled hydrodynamic–biogeochemical model
Technical note: Novel triple O2 sensor aquatic eddy covariance instrument with improved time shift correction reveals central role of microphytobenthos for carbon cycling in coral reef sands
Long-term spatiotemporal variations in and expansion of low-oxygen conditions in the Pearl River estuary: a study synthesizing observations during 1976–2017
Fe-binding organic ligands in coastal and frontal regions of the western Antarctic Peninsula
Temporal variability and driving factors of the carbonate system in the Aransas Ship Channel, TX, USA: a time series study
Nitrogen loss processes in response to upwelling in a Peruvian coastal setting dominated by denitrification – a mesocosm approach
Retracing hypoxia in Eckernförde Bight (Baltic Sea)
The impact of the freeze–melt cycle of land-fast ice on the distribution of dissolved organic matter in the Laptev and East Siberian seas (Siberian Arctic)
The fate of upwelled nitrate off Peru shaped by submesoscale filaments and fronts
Coastal processes modify projections of some climate-driven stressors in the California Current System
Upwelling-induced trace gas dynamics in the Baltic Sea inferred from 8 years of autonomous measurements on a ship of opportunity
Destruction and reinstatement of coastal hypoxia in the South China Sea off the Pearl River estuary
Hypersaline tidal flats as important “blue carbon” systems: a case study from three ecosystems
Drivers and impact of the seasonal variability of the organic carbon offshore transport in the Canary upwelling system
Organic carbon densities and accumulation rates in surface sediments of the North Sea and Skagerrak
An observation-based evaluation and ranking of historical Earth system model simulations in the northwest North Atlantic Ocean
Characterizing the origins of dissolved organic carbon in coastal seawater using stable carbon isotope and light absorption characteristics
Warming and ocean acidification may decrease estuarine dissolved organic carbon export to the ocean
Chemical characterization of the Punta de Fuencaliente CO2-enriched system (La Palma, NE Atlantic Ocean): a new natural laboratory for ocean acidification studies
The seasonal phases of an Arctic lagoon reveal the discontinuities of pH variability and CO2 flux at the air–sea interface
The northern European shelf as an increasing net sink for CO2
Impacts of biogenic polyunsaturated aldehydes on metabolism and community composition of particle-attached bacteria in coastal hypoxia
A Lagrangian study of the contribution of the Canary coastal upwelling to the nitrogen budget of the open North Atlantic
Denitrification by benthic foraminifera and their contribution to N-loss from a fjord environment
A numerical model study of the main factors contributing to hypoxia and its interannual and short-term variability in the East China Sea
The effects of decomposing invasive jellyfish on biogeochemical fluxes and microbial dynamics in an ultra-oligotrophic sea
Using 226Ra and 228Ra isotopes to distinguish water mass distribution in the Canadian Arctic Archipelago
Factors controlling plankton community production, export flux, and particulate matter stoichiometry in the coastal upwelling system off Peru
Reconstructing extreme climatic and geochemical conditions during the largest natural mangrove dieback on record
Technical note: Measurements and data analysis of sediment–water oxygen flux using a new dual-optode eddy covariance instrument
Stella-Theresa Stoicescu, Jaan Laanemets, Taavi Liblik, Māris Skudra, Oliver Samlas, Inga Lips, and Urmas Lips
Biogeosciences, 19, 2903–2920, https://doi.org/10.5194/bg-19-2903-2022, https://doi.org/10.5194/bg-19-2903-2022, 2022
Short summary
Short summary
Coastal basins with high input of nutrients often suffer from oxygen deficiency. In summer 2018, the extent of oxygen depletion was exceptional in the Gulf of Riga. We analyzed observational data and found that extensive oxygen deficiency appeared since the water layer close to the seabed, where oxygen is consumed, was separated from the surface layer. The problem worsens if similar conditions restricting vertical transport of oxygen occur more frequently in the future.
Justin C. Tiano, Jochen Depestele, Gert Van Hoey, João Fernandes, Pieter van Rijswijk, and Karline Soetaert
Biogeosciences, 19, 2583–2598, https://doi.org/10.5194/bg-19-2583-2022, https://doi.org/10.5194/bg-19-2583-2022, 2022
Short summary
Short summary
This study gives an assessment of bottom trawling on physical, chemical, and biological characteristics in a location known for its strong currents and variable habitats. Although trawl gears only removed the top 1 cm of the seabed surface, impacts on reef-building tubeworms significantly decreased carbon and nutrient cycling. Lighter trawls slightly reduced the impact on fauna and nutrients. Tubeworms were strongly linked to biogeochemical and faunal aspects before but not after trawling.
Inda Brinkmann, Christine Barras, Tom Jilbert, Tomas Næraa, K. Mareike Paul, Magali Schweizer, and Helena L. Filipsson
Biogeosciences, 19, 2523–2535, https://doi.org/10.5194/bg-19-2523-2022, https://doi.org/10.5194/bg-19-2523-2022, 2022
Short summary
Short summary
The concentration of the trace metal barium (Ba) in coastal seawater is a function of continental input, such as riverine discharge. Our geochemical records of the severely hot and dry year 2018, and following wet year 2019, reveal that prolonged drought imprints with exceptionally low Ba concentrations in benthic foraminiferal calcium carbonates of coastal sediments. This highlights the potential of benthic Ba / Ca to trace past climate extremes and variability in coastal marine records.
Shichao Tian, Birgit Gaye, Jianhui Tang, Yongming Luo, Wenguo Li, Niko Lahajnar, Kirstin Dähnke, Tina Sanders, Tianqi Xiong, Weidong Zhai, and Kay-Christian Emeis
Biogeosciences, 19, 2397–2415, https://doi.org/10.5194/bg-19-2397-2022, https://doi.org/10.5194/bg-19-2397-2022, 2022
Short summary
Short summary
We constrain the nitrogen budget and in particular the internal sources and sinks of nitrate in the Bohai Sea by using a mass-based and dual stable isotope approach based on δ15N and δ18O of nitrate. Based on available mass fluxes and isotope data an updated nitrogen budget is proposed. Compared to previous estimates, it is more complete and includes the impact of the interior cycle (nitrification) on the nitrate pool. The main external nitrogen sources are rivers contributing 19.2 %–25.6 %.
Gesa Schulz, Tina Sanders, Justus E. E. van Beusekom, Yoana G. Voynova, Andreas Schöl, and Kirstin Dähnke
Biogeosciences, 19, 2007–2024, https://doi.org/10.5194/bg-19-2007-2022, https://doi.org/10.5194/bg-19-2007-2022, 2022
Short summary
Short summary
Estuaries can significantly alter nutrient loads before reaching coastal waters. Our study of the heavily managed Ems estuary (Northern Germany) reveals three zones of nitrogen turnover along the estuary with water-column denitrification in the most upstream hyper-turbid part, nitrate production in the middle reaches and mixing/nitrate uptake in the North Sea. Suspended particulate matter was the overarching control on nitrogen cycling in the hyper-turbid estuary.
Bryce Van Dam, Nele Lehmann, Mary Zeller, Andreas Neumann, Daniel Pröfrock, Marko Lipka, Helmuth Thomas, and Michael E. Böttcher
EGUsphere, https://doi.org/10.5194/egusphere-2022-161, https://doi.org/10.5194/egusphere-2022-161, 2022
Short summary
Short summary
We quantified sediment-water exchange at shallow sites in the North and Baltic Seas. We found that porewater irrigation rates in the former were approximately twice as high as previously estimated, likely driven by relatively high bio-irrigative activity. In contrast, we found small net fluxes of alkalinity, ranging from -35 µmol m-2 hr-1 (uptake) to 53 µmol m-2 hr-1 (release). We attribute this to low net denitrification, carbonate mineral (re)precipitation and sulfide (re)oxidation.
Wiley Evans, Geoffrey T. Lebon, Christen D. Harrington, Yuichiro Takeshita, and Allison Bidlack
Biogeosciences, 19, 1277–1301, https://doi.org/10.5194/bg-19-1277-2022, https://doi.org/10.5194/bg-19-1277-2022, 2022
Short summary
Short summary
Information on the marine carbon dioxide system along the northeast Pacific Inside Passage has been limited. To address this gap, we instrumented an Alaskan ferry in order to characterize the marine carbon dioxide system in this region. Data over a 2-year period were used to assess drivers of the observed variability, identify the timing of severe conditions, and assess the extent of contemporary ocean acidification as well as future levels consistent with a 1.5 °C warmer climate.
Malcolm E. Scully, W. Rockwell Geyer, David Borkman, Tracy L. Pugh, Amy Costa, and Owen C. Nichols
Biogeosciences Discuss., https://doi.org/10.5194/bg-2022-48, https://doi.org/10.5194/bg-2022-48, 2022
Revised manuscript accepted for BG
Short summary
Short summary
For two consecutive summers, the bottom waters in southern Cape Cod Bay became severely depleted of dissolved oxygen. Low oxygen levels in bottom waters have never been reported in this area before, and this unprecedented occurrence is likely the result of a new algae species that recently began blooming during the late summer months. We present data suggesting that blooms of this new species are the result of regional climate change including warmer waters and changes in summer winds.
Melissa Ward, Tye L. Kindinger, Heidi K. Hirsh, Tessa M. Hill, Brittany M. Jellison, Sarah Lummis, Emily B. Rivest, George G. Waldbusser, Brian Gaylord, and Kristy J. Kroeker
Biogeosciences, 19, 689–699, https://doi.org/10.5194/bg-19-689-2022, https://doi.org/10.5194/bg-19-689-2022, 2022
Short summary
Short summary
Here, we synthesize the results from 62 studies reporting in situ rates of seagrass metabolism to highlight spatial and temporal variability in oxygen fluxes and inform efforts to use seagrass to mitigate ocean acidification. Our analyses suggest seagrass meadows are generally autotrophic and variable in space and time, and the effects on seawater oxygen are relatively small in magnitude.
Tianfei Xue, Ivy Frenger, A. E. Friederike Prowe, Yonss Saranga José, and Andreas Oschlies
Biogeosciences, 19, 455–475, https://doi.org/10.5194/bg-19-455-2022, https://doi.org/10.5194/bg-19-455-2022, 2022
Short summary
Short summary
The Peruvian system supports 10 % of the world's fishing yield. In the Peruvian system, wind and earth’s rotation bring cold, nutrient-rich water to the surface and allow phytoplankton to grow. But observations show that it grows worse at high upwelling. Using a model, we find that high upwelling happens when air mixes the water the most. Then phytoplankton is diluted and grows slowly due to low light and cool upwelled water. This study helps to estimate how it might change in a warming climate.
Shao-Min Chen, Ulf Riebesell, Kai G. Schulz, Elisabeth von der Esch, Eric P. Achterberg, and Lennart T. Bach
Biogeosciences, 19, 295–312, https://doi.org/10.5194/bg-19-295-2022, https://doi.org/10.5194/bg-19-295-2022, 2022
Short summary
Short summary
Oxygen minimum zones in the ocean are characterized by enhanced carbon dioxide (CO2) levels and are being further acidified by increasing anthropogenic atmospheric CO2. Here we report CO2 system measurements in a mesocosm study offshore Peru during a rare coastal El Niño event to investigate how CO2 dynamics may respond to ongoing ocean deoxygenation. Our observations show that nitrogen limitation, productivity, and plankton community shift play an important role in driving the CO2 dynamics.
Zheng Chen, Bin Wang, Chuang Xu, Zhongren Zhang, Shiyu Li, and Jiatang Hu
Biogeosciences Discuss., https://doi.org/10.5194/bg-2021-358, https://doi.org/10.5194/bg-2021-358, 2022
Revised manuscript accepted for BG
Short summary
Short summary
Deterioration of low-oxygen conditions in eastern Pearl River Estuary (PRE) was revealed by monitoring data over 25 years. The declining wind forcing and increasing nutrient input contributed significantly to areal expansion and intensity deterioration of low oxygen. Besides, the exacerbated eutrophication drove a shift in the dominant source of organic matter from terrestrial inputs to in situ primary production, which has probably led to an earlier onset of hypoxia in summer.
Paula Maria Salgado-Hernanz, Aurore Regaudie-de-Gioux, David Antoine, and Gotzon Basterretxea
Biogeosciences, 19, 47–69, https://doi.org/10.5194/bg-19-47-2022, https://doi.org/10.5194/bg-19-47-2022, 2022
Short summary
Short summary
For the first time, this study presents the characteristics of primary production in coastal regions of the Mediterranean Sea based on satellite-borne observations for the period 2002–2016. The study concludes that there are significant spatial and temporal variations among different regions. Quantifying primary production is of special importance in the marine food web and in the sequestration of carbon dioxide from the atmosphere to the deep waters.
Jiaying Abby Guo, Robert Strzepek, Anusuya Willis, Aaron Ferderer, and Lennart Thomas Bach
Biogeosciences Discuss., https://doi.org/10.5194/bg-2021-312, https://doi.org/10.5194/bg-2021-312, 2022
Revised manuscript accepted for BG
Short summary
Short summary
Ocean alkalinity enhancement is a carbon removal method, but it may cause a significant perturbation of the ocean with trace metals such as Nickel (Ni). This study tested the effect of increasing Ni concentrations on phytoplankton growth and photosynthesis. We found that the response to Ni varied across the 11 phytoplankton species tested here but the majority were insensitive. This may be due to the use of nitrate as the nitrogen source and due to high ligand concentrations (low Ni2+) in media.
Samu Elovaara, Eeva Eronen-Rasimus, Eero Asmala, Tobias Tamelander, and Hermanni Kaartokallio
Biogeosciences, 18, 6589–6616, https://doi.org/10.5194/bg-18-6589-2021, https://doi.org/10.5194/bg-18-6589-2021, 2021
Short summary
Short summary
Dissolved organic matter (DOM) is a significant carbon pool in the marine environment. The composition of the DOM pool, as well as its interaction with microbes, is complex, yet understanding it is important for understanding global carbon cycling. This study shows that two phytoplankton species have different effects on the composition of the DOM pool and, through the DOM they produce, on the ensuing microbial community. These communities in turn have different effects on DOM composition.
Yuan Dong, Qian P. Li, Zhengchao Wu, Yiping Shuai, Zijia Liu, Zaiming Ge, Weiwen Zhou, and Yinchao Chen
Biogeosciences, 18, 6423–6434, https://doi.org/10.5194/bg-18-6423-2021, https://doi.org/10.5194/bg-18-6423-2021, 2021
Short summary
Short summary
Temporal change of plankton growth and grazing are less known in the coastal ocean, not to mention the relevant controlling mechanisms. Here, we performed monthly size-specific dilution experiments outside a eutrophic estuary over a 1-year cycle. Phytoplankton growth was correlated to nutrients and grazing mortality to total chlorophyll a. A selective grazing on small cells may be important for maintaining high abundance of large-chain-forming diatoms in this eutrophic system.
Kiefer O. Forsch, Lisa Hahn-Woernle, Robert M. Sherrell, Vincent J. Roccanova, Kaixuan Bu, David Burdige, Maria Vernet, and Katherine A. Barbeau
Biogeosciences, 18, 6349–6375, https://doi.org/10.5194/bg-18-6349-2021, https://doi.org/10.5194/bg-18-6349-2021, 2021
Short summary
Short summary
We show that for an unperturbed cold western Antarctic Peninsula fjord, the seasonality of iron and manganese is linked to the dispersal of metal-rich meltwater sources. Geochemical measurements of trace metals in meltwaters, porewaters, and seawater, collected during two expeditions, showed a seasonal cycle of distinct sources. Finally, model results revealed that the dispersal of surface meltwater and meltwater plumes originating from under the glacier is sensitive to katabatic wind events.
Jenny Hieronymus, Kari Eilola, Malin Olofsson, Inga Hense, H. E. Markus Meier, and Elin Almroth-Rosell
Biogeosciences, 18, 6213–6227, https://doi.org/10.5194/bg-18-6213-2021, https://doi.org/10.5194/bg-18-6213-2021, 2021
Short summary
Short summary
Dense blooms of cyanobacteria occur every summer in the Baltic Proper and can add to eutrophication by their ability to turn nitrogen gas into dissolved inorganic nitrogen. Being able to correctly estimate the size of this nitrogen fixation is important for management purposes. In this work, we find that the life cycle of cyanobacteria plays an important role in capturing the seasonality of the blooms as well as the size of nitrogen fixation in our ocean model.
Tom Hull, Naomi Greenwood, Antony Birchill, Alexander Beaton, Matthew Palmer, and Jan Kaiser
Biogeosciences, 18, 6167–6180, https://doi.org/10.5194/bg-18-6167-2021, https://doi.org/10.5194/bg-18-6167-2021, 2021
Short summary
Short summary
The shallow shelf seas play a large role in the global cycling of CO2 and also support large fisheries. We use an autonomous underwater vehicle in the central North Sea to measure the rates of change in oxygen and nutrients.
Using these data we determine the amount of carbon dioxide taken out of the atmosphere by the sea and measure how productive the region is.
These observations will be useful for improving our predictive models and help us predict and adapt to a changing ocean.
Puthenveettil Narayana Menon Vinayachandran, Yukio Masumoto, Michael J. Roberts, Jenny A. Huggett, Issufo Halo, Abhisek Chatterjee, Prakash Amol, Garuda V. M. Gupta, Arvind Singh, Arnab Mukherjee, Satya Prakash, Lynnath E. Beckley, Eric Jorden Raes, and Raleigh Hood
Biogeosciences, 18, 5967–6029, https://doi.org/10.5194/bg-18-5967-2021, https://doi.org/10.5194/bg-18-5967-2021, 2021
Short summary
Short summary
Upwelling in the coastal ocean triggers biological productivity and thus enhances fisheries. Therefore, understanding the phenomenon of upwelling and the underlying mechanisms is important. In this paper, the present understanding of the upwelling along the coastline of the Indian Ocean from the coast of Africa all the way up to the coast of Australia is reviewed. The review provides a synthesis of the physical processes associated with upwelling and its impact on the marine ecosystem.
Gaël Many, Caroline Ulses, Claude Estournel, and Patrick Marsaleix
Biogeosciences, 18, 5513–5538, https://doi.org/10.5194/bg-18-5513-2021, https://doi.org/10.5194/bg-18-5513-2021, 2021
Short summary
Short summary
The Gulf of Lion shelf is one of the most productive areas in the Mediterranean. A model is used to study the mechanisms that drive the particulate organic carbon (POC). The model reproduces the annual cycle of primary production well. The shelf appears as an autotrophic ecosystem with a high production and as a source of POC for the adjacent basin. The increase in temperature induced by climate change could impact the trophic status of the shelf.
Alireza Merikhi, Peter Berg, and Markus Huettel
Biogeosciences, 18, 5381–5395, https://doi.org/10.5194/bg-18-5381-2021, https://doi.org/10.5194/bg-18-5381-2021, 2021
Short summary
Short summary
The aquatic eddy covariance technique is a powerful method for measurements of solute fluxes across the sediment–water interface. Data measured by conventional eddy covariance instruments require a time shift correction that can result in substantial flux errors. We introduce a triple O2 sensor eddy covariance instrument that by design eliminates these errors. Deployments next to a conventional instrument in the Florida Keys demonstrate the improvements achieved through the new design.
Jiatang Hu, Zhongren Zhang, Bin Wang, and Jia Huang
Biogeosciences, 18, 5247–5264, https://doi.org/10.5194/bg-18-5247-2021, https://doi.org/10.5194/bg-18-5247-2021, 2021
Short summary
Short summary
In situ observations over 42 years were used to explore the long-term changes to low-oxygen conditions in the Pearl River estuary. Apparent expansion of the low-oxygen conditions in summer was identified, primarily due to the combined effects of increased anthropogenic inputs and decreased sediment load. Large areas of severe low-oxygen events were also observed in early autumn and were formed by distinct mechanisms. The estuary seems to be growing into a seasonal, estuary-wide hypoxic zone.
Indah Ardiningsih, Kyyas Seyitmuhammedov, Sylvia G. Sander, Claudine H. Stirling, Gert-Jan Reichart, Kevin R. Arrigo, Loes J. A. Gerringa, and Rob Middag
Biogeosciences, 18, 4587–4601, https://doi.org/10.5194/bg-18-4587-2021, https://doi.org/10.5194/bg-18-4587-2021, 2021
Short summary
Short summary
Organic Fe speciation is investigated along a natural gradient of the western Antarctic Peninsula from an ice-covered shelf to the open ocean. The two major fronts in the region affect the distribution of ligands. The excess ligands not bound to dissolved Fe (DFe) comprised up to 80 % of the total ligand concentrations, implying the potential to solubilize additional Fe input. The ligands on the shelf can increase the DFe residence time and fuel local primary production upon ice melt.
Melissa R. McCutcheon, Hongming Yao, Cory J. Staryk, and Xinping Hu
Biogeosciences, 18, 4571–4586, https://doi.org/10.5194/bg-18-4571-2021, https://doi.org/10.5194/bg-18-4571-2021, 2021
Short summary
Short summary
We used 5+ years of discrete samples and 10 months of hourly sensor measurements to explore temporal variability and environmental controls on pH and pCO2 at the Aransas Ship Channel. Seasonal and diel variability were both present but small compared to other regions in the literature. Despite the small tidal range, tidal control often surpassed biological control. In comparison with sensor data, discrete samples were generally representative of mean annual and seasonal carbonate chemistry.
Kai G. Schulz, Eric P. Achterberg, Javier Arístegui, Lennart T. Bach, Isabel Baños, Tim Boxhammer, Dirk Erler, Maricarmen Igarza, Verena Kalter, Andrea Ludwig, Carolin Löscher, Jana Meyer, Judith Meyer, Fabrizio Minutolo, Elisabeth von der Esch, Bess B. Ward, and Ulf Riebesell
Biogeosciences, 18, 4305–4320, https://doi.org/10.5194/bg-18-4305-2021, https://doi.org/10.5194/bg-18-4305-2021, 2021
Short summary
Short summary
Upwelling of nutrient-rich deep waters to the surface make eastern boundary upwelling systems hot spots of marine productivity. This leads to subsurface oxygen depletion and the transformation of bioavailable nitrogen into inert N2. Here we quantify nitrogen loss processes following a simulated deep water upwelling. Denitrification was the dominant process, and budget calculations suggest that a significant portion of nitrogen that could be exported to depth is already lost in the surface ocean.
Heiner Dietze and Ulrike Löptien
Biogeosciences, 18, 4243–4264, https://doi.org/10.5194/bg-18-4243-2021, https://doi.org/10.5194/bg-18-4243-2021, 2021
Short summary
Short summary
In recent years fish-kill events caused by oxygen deficit have been reported in Eckernförde Bight (Baltic Sea). This study sets out to understand the processes causing respective oxygen deficits by combining high-resolution coupled ocean circulation biogeochemical modeling, monitoring data, and artificial intelligence.
Jens A. Hölemann, Bennet Juhls, Dorothea Bauch, Markus Janout, Boris P. Koch, and Birgit Heim
Biogeosciences, 18, 3637–3655, https://doi.org/10.5194/bg-18-3637-2021, https://doi.org/10.5194/bg-18-3637-2021, 2021
Short summary
Short summary
The Arctic Ocean receives large amounts of river water rich in terrestrial dissolved organic matter (tDOM), which is an important component of the Arctic carbon cycle. Our analysis shows that mixing of three major freshwater sources is the main factor that regulates the distribution of tDOM concentrations in the Siberian shelf seas. In this context, the formation and melting of the land-fast ice in the Laptev Sea and the peak spring discharge of the Lena River are of particular importance.
Jaard Hauschildt, Soeren Thomsen, Vincent Echevin, Andreas Oschlies, Yonss Saranga José, Gerd Krahmann, Laura A. Bristow, and Gaute Lavik
Biogeosciences, 18, 3605–3629, https://doi.org/10.5194/bg-18-3605-2021, https://doi.org/10.5194/bg-18-3605-2021, 2021
Short summary
Short summary
In this paper we quantify the subduction of upwelled nitrate due to physical processes on the order of several kilometers in the coastal upwelling off Peru and its effect on primary production. We also compare the prepresentation of these processes in a high-resolution simulation (~2.5 km) with a more coarsely resolved simulation (~12 km). To do this, we combine high-resolution shipboard observations of physical and biogeochemical parameters with a complex biogeochemical model configuration.
Samantha A. Siedlecki, Darren Pilcher, Evan M. Howard, Curtis Deutsch, Parker MacCready, Emily L. Norton, Hartmut Frenzel, Jan Newton, Richard A. Feely, Simone R. Alin, and Terrie Klinger
Biogeosciences, 18, 2871–2890, https://doi.org/10.5194/bg-18-2871-2021, https://doi.org/10.5194/bg-18-2871-2021, 2021
Short summary
Short summary
Future ocean conditions can be simulated using projected trends in fossil fuel use paired with Earth system models. Global models generally do not include local processes important to coastal ecosystems. These coastal processes can alter the degree of change projected. Higher-resolution models that include local processes predict modified changes in carbon stressors when compared to changes projected by global models in the California Current System.
Erik Jacobs, Henry C. Bittig, Ulf Gräwe, Carolyn A. Graves, Michael Glockzin, Jens D. Müller, Bernd Schneider, and Gregor Rehder
Biogeosciences, 18, 2679–2709, https://doi.org/10.5194/bg-18-2679-2021, https://doi.org/10.5194/bg-18-2679-2021, 2021
Short summary
Short summary
We use a unique data set of 8 years of continuous carbon dioxide (CO2) and methane (CH4) surface water measurements from a commercial ferry to study upwelling in the Baltic Sea. Its seasonality and regional and interannual variability are examined. Strong upwelling events drastically increase local surface CO2 and CH4 levels and are mostly detected in late summer after long periods of impaired mixing. We introduce an extrapolation method to estimate regional upwelling-induced trace gas fluxes.
Yangyang Zhao, Khanittha Uthaipan, Zhongming Lu, Yan Li, Jing Liu, Hongbin Liu, Jianping Gan, Feifei Meng, and Minhan Dai
Biogeosciences, 18, 2755–2775, https://doi.org/10.5194/bg-18-2755-2021, https://doi.org/10.5194/bg-18-2755-2021, 2021
Short summary
Short summary
In situ oxygen consumption rates were estimated for the first time during destruction of coastal hypoxia as disturbed by a typhoon and its reinstatement in the South China Sea off the Pearl River estuary. The reinstatement of summer hypoxia was rapid with a comparable timescale with that of its initial disturbance from frequent tropical cyclones, which has important implications for better understanding the intermittent nature of coastal hypoxia and its prediction in a changing climate.
Dylan R. Brown, Humberto Marotta, Roberta B. Peixoto, Alex Enrich-Prast, Glenda C. Barroso, Mario L. G. Soares, Wilson Machado, Alexander Pérez, Joseph M. Smoak, Luciana M. Sanders, Stephen Conrad, James Z. Sippo, Isaac R. Santos, Damien T. Maher, and Christian J. Sanders
Biogeosciences, 18, 2527–2538, https://doi.org/10.5194/bg-18-2527-2021, https://doi.org/10.5194/bg-18-2527-2021, 2021
Short summary
Short summary
Hypersaline tidal flats (HTFs) are coastal ecosystems with freshwater deficits often occurring in arid or semi-arid regions near mangrove supratidal zones with no major fluvial contributions. This study shows that HTFs are important carbon and nutrient sinks which may be significant given their extensive coverage. Our findings highlight a previously unquantified carbon as well as a nutrient sink and suggest that coastal HTF ecosystems could be included in the emerging blue carbon framework.
Giulia Bonino, Elisa Lovecchio, Nicolas Gruber, Matthias Münnich, Simona Masina, and Doroteaciro Iovino
Biogeosciences, 18, 2429–2448, https://doi.org/10.5194/bg-18-2429-2021, https://doi.org/10.5194/bg-18-2429-2021, 2021
Short summary
Short summary
Seasonal variations of processes such as upwelling and biological production that happen along the northwestern African coast can modulate the temporal variability of the biological activity of the adjacent open North Atlantic hundreds of kilometers away from the coast thanks to the lateral transport of coastal organic carbon. This happens with a temporal delay, which is smaller than a season up to roughly 500 km from the coast due to the intense transport by small-scale filaments.
Markus Diesing, Terje Thorsnes, and Lilja Rún Bjarnadóttir
Biogeosciences, 18, 2139–2160, https://doi.org/10.5194/bg-18-2139-2021, https://doi.org/10.5194/bg-18-2139-2021, 2021
Short summary
Short summary
The upper 10 cm of the seafloor of the North Sea and Skagerrak contain 231×106 t of carbon in organic form. The Norwegian Trough, the deepest sedimentary basin in the studied area, stands out as a zone of strong organic carbon accumulation with rates on par with neighbouring fjords. Conversely, large parts of the North Sea are characterised by rapid organic carbon degradation and negligible accumulation. This dual character is likely typical for continental shelf sediments worldwide.
Arnaud Laurent, Katja Fennel, and Angela Kuhn
Biogeosciences, 18, 1803–1822, https://doi.org/10.5194/bg-18-1803-2021, https://doi.org/10.5194/bg-18-1803-2021, 2021
Short summary
Short summary
CMIP5 and CMIP6 models, and a high-resolution regional model, were evaluated by comparing historical simulations with observations in the northwest North Atlantic, a climate-sensitive and biologically productive ocean margin region. Many of the CMIP models performed poorly for biological properties. There is no clear link between model resolution and skill in the global models, but there is an overall improvement in performance in CMIP6 from CMIP5. The regional model performed best.
Heejun Han, Jeomshik Hwang, and Guebuem Kim
Biogeosciences, 18, 1793–1801, https://doi.org/10.5194/bg-18-1793-2021, https://doi.org/10.5194/bg-18-1793-2021, 2021
Short summary
Short summary
The main source of excess DOC occurring in coastal seawater off an artificial lake, which is enclosed by a dike along the western coast of South Korea, was determined using a combination of various biogeochemical tools including DOC and nutrient concentrations, stable carbon isotope, and optical properties (absorbance and fluorescence) of dissolved organic matter in two different seasons (March 2017 and September 2018).
Michelle N. Simone, Kai G. Schulz, Joanne M. Oakes, and Bradley D. Eyre
Biogeosciences, 18, 1823–1838, https://doi.org/10.5194/bg-18-1823-2021, https://doi.org/10.5194/bg-18-1823-2021, 2021
Short summary
Short summary
Estuaries are responsible for a large contribution of dissolved organic carbon (DOC) to the global C cycle, but it is unknown how this will change in the future. DOC fluxes from unvegetated sediments were investigated ex situ subject to conditions of warming and ocean acidification. The future climate shifted sediment fluxes from a slight DOC source to a significant sink, with global coastal DOC export decreasing by 80 %. This has global implications for C cycling and long-term C storage.
Sara González-Delgado, David González-Santana, Magdalena Santana-Casiano, Melchor González-Dávila, Celso A. Hernández, Carlos Sangil, and José Carlos Hernández
Biogeosciences, 18, 1673–1687, https://doi.org/10.5194/bg-18-1673-2021, https://doi.org/10.5194/bg-18-1673-2021, 2021
Short summary
Short summary
We describe the carbon system dynamics of a new CO2 seep system located off the coast of La Palma. We explored for over a year, finding points with lower levels of pH and alkalinity; high levels of carbon; and poorer levels of aragonite and calcite, both essential for calcifying species. The seeps are a key feature for robust experimental designs, aimed at comprehending how life has persisted through past eras or at predicting the consequences of ocean acidification in the marine realm.
Cale A. Miller, Christina Bonsell, Nathan D. McTigue, and Amanda L. Kelley
Biogeosciences, 18, 1203–1221, https://doi.org/10.5194/bg-18-1203-2021, https://doi.org/10.5194/bg-18-1203-2021, 2021
Short summary
Short summary
We report here the first year-long high-frequency pH data set for an Arctic lagoon that captures ice-free and ice-covered seasons. pH and salinity correlation varies by year as we observed positive correlation and independence. Photosynthesis is found to drive high pH values, and small changes in underwater solar radiation can result in rapid decreases in pH. We estimate that arctic lagoons may act as sources of CO2 to the atmosphere, potentially offsetting the Arctic Ocean's CO2 sink capacity.
Meike Becker, Are Olsen, Peter Landschützer, Abdirhaman Omar, Gregor Rehder, Christian Rödenbeck, and Ingunn Skjelvan
Biogeosciences, 18, 1127–1147, https://doi.org/10.5194/bg-18-1127-2021, https://doi.org/10.5194/bg-18-1127-2021, 2021
Short summary
Short summary
We developed a simple method to refine existing open-ocean maps towards different coastal seas. Using a multi-linear regression, we produced monthly maps of surface ocean fCO2 in the northern European coastal seas (the North Sea, the Baltic Sea, the Norwegian Coast and the Barents Sea) covering a time period from 1998 to 2016. Based on this fCO2 map, we calculate trends in surface ocean fCO2, pH and the air–sea gas exchange.
Zhengchao Wu, Qian P. Li, Zaiming Ge, Bangqin Huang, and Chunming Dong
Biogeosciences, 18, 1049–1065, https://doi.org/10.5194/bg-18-1049-2021, https://doi.org/10.5194/bg-18-1049-2021, 2021
Short summary
Short summary
Seasonal hypoxia in the nearshore bottom waters frequently occurs in the Pearl River estuary. Aerobic respiration is the ultimate cause of local hypoxia. We found an elevated level of polyunsaturated aldehydes in the bottom water outside the estuary, which promoted the growth and metabolism of special groups of particle-attached bacteria and thus contributed to oxygen depletion in hypoxic waters. Our results may be important for understanding coastal hypoxia and its linkages to eutrophication.
Derara Hailegeorgis, Zouhair Lachkar, Christoph Rieper, and Nicolas Gruber
Biogeosciences, 18, 303–325, https://doi.org/10.5194/bg-18-303-2021, https://doi.org/10.5194/bg-18-303-2021, 2021
Short summary
Short summary
Using a Lagrangian modeling approach, this study provides a quantitative analysis of water and nitrogen offshore transport in the Canary Current System. We investigate the timescales, reach and structure of offshore transport and demonstrate that the Canary upwelling is a key source of nutrients to the open North Atlantic Ocean. Our findings stress the need for improving the representation of the Canary system and other eastern boundary upwelling systems in global coarse-resolution models.
Constance Choquel, Emmanuelle Geslin, Edouard Metzger, Helena L. Filipsson, Nils Risgaard-Petersen, Patrick Launeau, Manuel Giraud, Thierry Jauffrais, Bruno Jesus, and Aurélia Mouret
Biogeosciences, 18, 327–341, https://doi.org/10.5194/bg-18-327-2021, https://doi.org/10.5194/bg-18-327-2021, 2021
Short summary
Short summary
Marine microorganisms such as foraminifera are able to live temporarily without oxygen in sediments. In a Swedish fjord subjected to seasonal oxygen scarcity, a change in fauna linked to the decrease in oxygen and the increase in an invasive species was shown. The invasive species respire nitrate until 100 % of the nitrate porewater in the sediment and could be a major contributor to nitrogen balance in oxic coastal ecosystems. But prolonged hypoxia creates unfavorable conditions to survive.
Haiyan Zhang, Katja Fennel, Arnaud Laurent, and Changwei Bian
Biogeosciences, 17, 5745–5761, https://doi.org/10.5194/bg-17-5745-2020, https://doi.org/10.5194/bg-17-5745-2020, 2020
Short summary
Short summary
In coastal seas, low oxygen, which is detrimental to coastal ecosystems, is increasingly caused by man-made nutrients from land. This is especially so near mouths of major rivers, including the Changjiang in the East China Sea. Here a simulation model is used to identify the main factors determining low-oxygen conditions in the region. High river discharge is identified as the prime cause, while wind and intrusions of open-ocean water modulate the severity and extent of low-oxygen conditions.
Tamar Guy-Haim, Maxim Rubin-Blum, Eyal Rahav, Natalia Belkin, Jacob Silverman, and Guy Sisma-Ventura
Biogeosciences, 17, 5489–5511, https://doi.org/10.5194/bg-17-5489-2020, https://doi.org/10.5194/bg-17-5489-2020, 2020
Short summary
Short summary
The availability of nutrients in oligotrophic marine ecosystems is limited. Following jellyfish blooms, large die-off events result in the release of high amounts of nutrients to the water column and sediment. Our study assessed the decomposition effects of an infamous invasive jellyfish in the ultra-oligotrophic Eastern Mediterranean Sea. We found that jellyfish decomposition favored heterotrophic bacteria and altered biogeochemical fluxes, further impoverishing this nutrient-poor ecosystem.
Chantal Mears, Helmuth Thomas, Paul B. Henderson, Matthew A. Charette, Hugh MacIntyre, Frank Dehairs, Christophe Monnin, and Alfonso Mucci
Biogeosciences, 17, 4937–4959, https://doi.org/10.5194/bg-17-4937-2020, https://doi.org/10.5194/bg-17-4937-2020, 2020
Short summary
Short summary
Major research initiatives have been undertaken within the Arctic Ocean, highlighting this area's global importance and vulnerability to climate change. In 2015, the international GEOTRACES program addressed this importance by devoting intense research activities to the Arctic Ocean. Among various tracers, we used radium and carbonate system data to elucidate the functioning and vulnerability of the hydrographic regime of the Canadian Arctic Archipelago, bridging the Pacific and Atlantic oceans.
Lennart Thomas Bach, Allanah Joy Paul, Tim Boxhammer, Elisabeth von der Esch, Michelle Graco, Kai Georg Schulz, Eric Achterberg, Paulina Aguayo, Javier Arístegui, Patrizia Ayón, Isabel Baños, Avy Bernales, Anne Sophie Boegeholz, Francisco Chavez, Gabriela Chavez, Shao-Min Chen, Kristin Doering, Alba Filella, Martin Fischer, Patricia Grasse, Mathias Haunost, Jan Hennke, Nauzet Hernández-Hernández, Mark Hopwood, Maricarmen Igarza, Verena Kalter, Leila Kittu, Peter Kohnert, Jesus Ledesma, Christian Lieberum, Silke Lischka, Carolin Löscher, Andrea Ludwig, Ursula Mendoza, Jana Meyer, Judith Meyer, Fabrizio Minutolo, Joaquin Ortiz Cortes, Jonna Piiparinen, Claudia Sforna, Kristian Spilling, Sonia Sanchez, Carsten Spisla, Michael Sswat, Mabel Zavala Moreira, and Ulf Riebesell
Biogeosciences, 17, 4831–4852, https://doi.org/10.5194/bg-17-4831-2020, https://doi.org/10.5194/bg-17-4831-2020, 2020
Short summary
Short summary
The eastern boundary upwelling system off Peru is among Earth's most productive ocean ecosystems, but the factors that control its functioning are poorly constrained. Here we used mesocosms, moored ~ 6 km offshore Peru, to investigate how processes in plankton communities drive key biogeochemical processes. We show that nutrient and light co-limitation keep productivity and export at a remarkably constant level while stoichiometry changes strongly with shifts in plankton community structure.
James Z. Sippo, Isaac R. Santos, Christian J. Sanders, Patricia Gadd, Quan Hua, Catherine E. Lovelock, Nadia S. Santini, Scott G. Johnston, Yota Harada, Gloria Reithmeir, and Damien T. Maher
Biogeosciences, 17, 4707–4726, https://doi.org/10.5194/bg-17-4707-2020, https://doi.org/10.5194/bg-17-4707-2020, 2020
Short summary
Short summary
In 2015–2016, a massive mangrove dieback event occurred along ~1000 km of coastline in Australia. Multiple lines of evidence from climate data, wood and sediment samples suggest low water availability within the dead mangrove forest. Wood and sediments also reveal a large increase in iron concentrations in mangrove sediments during the dieback. This study supports the hypothesis that the forest dieback was associated with low water availability driven by a climate-change-related ENSO event.
Markus Huettel, Peter Berg, and Alireza Merikhi
Biogeosciences, 17, 4459–4476, https://doi.org/10.5194/bg-17-4459-2020, https://doi.org/10.5194/bg-17-4459-2020, 2020
Short summary
Short summary
Oxygen fluxes are a valued proxy for organic carbon production and mineralization at the seafloor. These fluxes can be measured non-invasively with the aquatic eddy covariance instrument, but the fast, fragile oxygen sensor it uses often causes questionable flux data. We developed a dual-O2-optode instrument and data evaluation method that allow improved flux measurements. Deployments over carbonate sands in the shallow shelf demonstrate that the instrument can produce reliable oxygen flux data.
Cited articles
91/271/EEC: Directive 91/271/EEC concerning urban waste-water treatment,
Official Journal L, 135, 40–52, 1991.
91/676/EEC: Directive 91/676/EEC concerning the protection of waters against
pollution caused by nitrates from agricultural sources, Official Journal L,
375, 1–8, 1991.
Abril, G., Riou, S. A., Etcheber, H., Frankignoulle, M., de Wit, R., and
Middelburg, J. J.: Transient, tidal time-scale, nitrogen transformations in
an estuarine turbidity maximum – fluid mud system (The Gironde, South-west
France), Estuar. Coast. Shelf S., 50, 703–715, https://doi.org/10.1006/ecss.1999.0598,
2000.
Aquilina, L., Vergnaud-Ayraud, V., Labasque, T., Bour, O., Molenat, J., Ruiz,
L., de Montety, V., De Ridder, J., Roques, C., and Longuevergne, L.: Nitrate
dynamics in agricultural catchments deduced from groundwater dating and
long-term nitrate monitoring in surface- and groundwaters, Sci. Total
Environ., 435–436, 167–178, https://doi.org/10.1016/j.scitotenv.2012.06.028, 2012.
Belin, C. and Neaud-Masson, N.: Cahier de Procédures REPHY, Document de
prescription, Version 1, 61 pp., Ifremer, Nantes, France, 2017 (in French).
Belin, C. and Soudant, D.: Trente années d'observation des micro-algues
et des toxines d'algues sur le littoral, Éditions Quæ, Versailles,
258 pp., 2018 (in French).
Beusen, A. H. W., Bouwman, A. F., Van Beek, L. P. H., Mogollón, J. M.,
and Middelburg, J. J.: Global riverine N and P transport to ocean increased
during the 20th century despite increased retention along the aquatic
continuum, Biogeosciences, 13, 2441–2451,
https://doi.org/10.5194/bg-13-2441-2016, 2016.
Billen, G. and Garnier, J.: River basin nutrient delivery to the coastal sea:
Assessing its potential to sustain new production of non-siliceous algae,
Mar. Chem., 106, 148–160, https://doi.org/10.1016/j.marchem.2006.12.017, 2007.
Billen, G., Garnier, J., Nemery, J., Sebilo, M., Sferratore, A., Barles, S.,
Benoit, P., and Benoit, M.: A long-term view of nutrient transfers through
the Seine river continuum, Sci. Total Environ., 375, 80–97,
https://doi.org/10.1016/j.scitotenv.2006.12.005, 2007.
Bizzozero, L., Gohin, F., Lampert, L., Fortune, M., and Cochennec-Laureau,
N.: Apport des images satellite à l'évaluation de la qualité des
masses d'eau DCE. Analyse des données de Chlorophylle a sur la
période 2011–2016 dans les masses d'eau côtière du bassin
versant Loire-Bretagne, 50 pp., Ifremer, Nantes, France, 2018 (in French).
Blomqvist, S., Gunnars, A., and Elmgren, R.: Why the limiting nutrient
differs between temperate coastal seas and freshwater lakes: A matter of
salt, Limnol. Oceanogr., 49, 2236–2241, https://doi.org/10.4319/lo.2004.49.6.2236, 2004.
Bouraoui, F. and Grizzetti, B.: An integrated modelling framework to estimate
the fate of nutrients: Application to the Loire (France), Ecol. Model., 212,
450–459, https://doi.org/10.1016/j.ecolmodel.2007.10.037, 2008.
Bouraoui, F. and Grizzetti, B.: Long term change of nutrient concentrations
of rivers discharging in European seas, Sci. Total Environ., 409, 4899–4916,
https://doi.org/10.1016/j.scitotenv.2011.08.015, 2011.
Bouwman, A. F., Bierkens, M. F. P., Griffioen, J., Hefting, M. M.,
Middelburg, J. J., Middelkoop, H., and Slomp, C. P.: Nutrient dynamics,
transfer and retention along the aquatic continuum from land to ocean:
towards integration of ecological and biogeochemical models, Biogeosciences,
10, 1–22, https://doi.org/10.5194/bg-10-1-2013, 2013.
Bowes, M. J., Ings, N. L., McCall, S. J., Warwick, A., Barrett, C., Wickham,
H. D., Harman, S. A., Armstrong, L. K., Scarlett, P. M., Roberts, C.,
Lehmann, K., and Singer, A. C.: Nutrient and light limitation of periphyton
in the River Thames: implications for catchment management, Sci. Total
Environ., 434, 201–212, https://doi.org/10.1016/j.scitotenv.2011.09.082, 2012.
Boyce, D. G., Lewis, M. R., and Worm, B.: Global phytoplankton decline over
the past century, Nature, 466, 591–596, https://doi.org/10.1038/nature09268, 2010.
Brzezinski, M. A.: The
Caddy, J. F.: Marine catchment basin effects versus impacts of fisheries on
semi-enclosed seas, ICES J. Mar. Sci., 57, 628–640,
https://doi.org/10.1006/jmsc.2000.0739, 2000.
Caraco, N., Cole, J. J., and Likens, G. E.: A comparison of phosphorus
immobilization in sediments of freshwater and coastal marine systems,
Biogeochemistry, 9, 277–290, https://doi.org/10.1007/bf00000602, 1990.
Chaalali, A., Brind'Amour, A., Dubois, S. F., and Le Bris, H.: Functional
roles of an engineer species for coastal benthic invertebrates and demersal
fish, Ecol. Evol., 7, 5542–5559, https://doi.org/10.1002/ece3.2857, 2017.
Chapelle, A.: Modélisation d'un écosystème marin côtier
soumis à l'eutrophisation: la Baie de Vilaine (Sud Bretagne). Etude du
phytoplancton et du bilan en oxygène, PhD thesis, Université Paris
VI, 214 pp., 1991 (in French).
Chapelle, A., Lazure, P., and Menesguen, A.: Modelling eutrophication events
in a coastal ecosystem. Sensitivity analysis, Estuar. Coast. Shelf S., 39,
529–548, https://doi.org/10.1016/S0272-7714(06)80008-9, 1994.
Cloern, J. E.: Does the benthos control phytoplankton biomass in south San
Francisco Bay?, Mar. Ecol.-Prog. Ser., 9, 191–202, 1982.
Cloern, J. E.: Our evolving conceptual model of the coastal eutrophication
problem, Mar. Ecol.-Prog. Ser., 210, 223–253, https://doi.org/10.3354/meps210223, 2001.
Cloern, J. E., Foster, S. Q., and Kleckner, A. E.: Phytoplankton primary
production in the world's estuarine-coastal ecosystems, Biogeosciences, 11,
2477–2501, https://doi.org/10.5194/bg-11-2477-2014, 2014.
Collos, Y., Souchu, P., and Tréguer, P.: Relationships between different
forms of inorganic nitrogen in rainwater of a coastal area and ground-level
gaseous nitrogen oxides, Atmos. Res., 23, 97–104,
https://doi.org/10.1016/0169-8095(89)90001-x, 1989.
Collos, Y., Bec, B., Jauzein, C., Abadie, E., Laugier, T., Lautier, J.,
Pastoureaud, A., Souchu, P., and Vaquer, A.: Oligotrophication and emergence
of picocyanobacteria and a toxic dinoflagellate in Thau lagoon, southern
France, J. Sea Res., 61, 68–75, https://doi.org/10.1016/j.seares.2008.05.008, 2009.
Conley, D. J.: Biogeochemical nutrient cycles and nutrient management
strategies, Hydrobiologia, 410, 87–96, https://doi.org/10.1023/a:1003784504005, 2000.
Conley, D. J., Schelske, C. L., and Stoermer, E. F.: Modification of the
biogeochemical cycle of silica with eutrophication, Mar. Ecol.-Prog. Ser.,
101, 179–192, https://doi.org/10.3354/meps101179, 1993.
Conley, D. J., Paerl, H. W., Howarth, R. W., Boesch, D. F., Seitzinger, S.
P., Havens, K. E., Lancelot, C., and Likens, G. E.: Controlling
Eutrophication: Nitrogen and phosphorus, Science, 323, 1014–1015,
https://doi.org/10.1126/science.1167755, 2009.
Correll, D. L.: Phosphorus: a rate limiting nutrient in surface waters,
Poultry Sci., 78, 674–682, https://doi.org/10.1093/ps/78.5.674, 1999.
Cowan, J. L. W. and Boynton, W. R.: Sediment-water oxygen and nutrient
exchanges along the longitudinal axis of Chesapeake Bay: Seasonal patterns,
controlling factors and ecological significance, Estuaries, 19, 562–580,
https://doi.org/10.2307/1352518, 1996.
Crouzet, P.: L'eutrophisation de la Loire, Water Supp., 1, 131–144, 1983 (in
French).
Deborde, J., Anschutz, P., Chaillou, G., Etcheber, H., Commarieu, M. V.,
Lecroart, P., and Abril, G.: The dynamics of phosphorus in turbid estuarine
systems: Example of the Gironde estuary (France), Limnol. Oceanogr., 52,
862–872, https://doi.org/10.4319/lo.2007.52.2.0862, 2007.
Del Amo, Y., Le Pape, O., Tréguer, P., Quéguiner, B., Ménesguen,
A., and Aminot, A.: Impacts of high-nitrate freshwater inputs on macrotidal
ecosystems. I. Seasonal evolution of nutrient limitation for the
diatom-dominated phytoplankton of the Bay of Brest (France), Mar. Ecol.-Prog.
Ser., 161, 213–224, https://doi.org/10.3354/meps161213, 1997.
Derolez, V., Bec, B., Munaron, D., Fiandrino, A., Pete, R., Simier, M.,
Souchu, P., Laugier, T., Aliaume, C., and Malet, N.: Recovery trajectories
following the reduction of urban nutrient inputs along the eutrophication
gradient in French Mediterranean lagoons, Ocean Coast. Manage., 171, 1–10,
https://doi.org/10.1016/j.ocecoaman.2019.01.012, 2019.
Désaunay, Y., Guérault, D., Le Pape, O., and Poulard, J.-C.: Changes
in occurrence and abundance of northern/southern flatfishes over a 20-year
period in a coastal nursery area (Bay of Vilaine) and on the eastern
continental shelf of the Bay of Biscay, Sci. Mar., 70, 193–200,
https://doi.org/10.3989/scimar.2006.70s1193, 2006.
Descy, J. P., Leitao, M., Everbecq, E., Smitz, J. S., and Deliege, J. F.:
Phytoplankton of the River Loire, France: a biodiversity and modelling study,
J. Plankton Res., 34, 120–135, https://doi.org/10.1093/plankt/fbr085, 2012.
Desmit, X., Thieu, V., Billen, G., Campuzano, F., Duliere, V., Garnier, J.,
Lassaletta, L., Menesguen, A., Neves, R., Pinto, L., Silvestre, M., Sobrinho,
J. L., and Lacroix, G.: Reducing marine eutrophication may require a
paradigmatic change, Sci. Total Environ., 635, 1444–1466,
https://doi.org/10.1016/j.scitotenv.2018.04.181, 2018.
Dintheer, C.: La pêche de Quiberon à la Vilaine, Vol. 1223, 93–98,
La Pêche Maritime, Paris, France, 1980.
Doney, S. C.: Oceanography: Plankton in a warmer world, Nature, 444,
695–696, https://doi.org/10.1038/444695a, 2006.
Downing, J. A.: Limnology and oceanography: Two estranged twins reuniting by
global change, Inland Waters, 4, 215–232, https://doi.org/10.5268/iw-4.2.753, 2014.
Duarte, C. M., Conley, D. J., Carstensen, J., and Sanchez-Camacho, M.: Return
to neverland: Shifting baselines affect eutrophication restoration targets,
Estuar. Coast., 32, 29–36, https://doi.org/10.1007/s12237-008-9111-2, 2009.
Dupas, R., Minaudo, C., Gruau, G., Ruiz, L., and Gascuel-Odoux, C.:
Multidecadal trajectory of riverine nitrogen and phosphorus dynamics in rural
catchments, Water Resour. Res., 54, 5327–5340, https://doi.org/10.1029/2018wr022905,
2018.
Edwards, M. and Richardson, A. J.: Impact of climate change on marine pelagic
phenology and trophic mismatch, Nature, 430, 881–884,
https://doi.org/10.1038/nature02808, 2004.
EEA: State of Europe's seas, 178 pp., European Environment Agency,
Luxembourg, 2017.
Egge, J. K. and Aksnes, D. L.: Silicate as regulating nutrient in
phytoplankton competition, Mar. Ecol.-Prog. Ser., 83, 281–289, 1992.
European Communities: Common implementation strategy for the Water Framework
Directive (2000/60/EC), Guidance Document No. 23, Guidance document on
eutrophication assessment in the context of European Water Policies, European
Communities, Luxembourg, 2009.
Feuchtmayr, H., Thackeray, S. J., Jones, I. D., De Ville, M., Fletcher, J.,
James, B. E. N., and Kelly, J.: Spring phytoplankton phenology – are
patterns and drivers of change consistent among lakes in the same
climatological region?, Freshwater Biol., 57, 331–344,
https://doi.org/10.1111/j.1365-2427.2011.02671.x, 2012.
Fisher, T. R., Peele, E. R., Ammerman, J. W., and Harding Jr., L. W.:
Nutrient limitation of phytoplankton in Chesapeake Bay, Mar. Ecol.-Prog.
Ser., 82, 51–63, 1992.
Floury, M., Delattre, C., Ormerod, S. J., and Souchon, Y.: Global versus
local change effects on a large European river, Sci. Total Environ., 441,
220–229, https://doi.org/10.1016/j.scitotenv.2012.09.051, 2012.
Garnier, J., Ramarson, A., Billen, G., Thery, S., Thiery, D., Thieu, V.,
Minaudo, C., and Moatar, F.: Nutrient inputs and hydrology together determine
biogeochemical status of the Loire River (France): Current situation and
possible future scenarios, Sci. Total Environ., 637–638, 609–624,
https://doi.org/10.1016/j.scitotenv.2018.05.045, 2018.
Glibert, P. M., Fullerton, D., Burkholder, J. M., Cornwell, J. C., and Kana,
T. M.: Ecological stoichiometry, biogeochemical cycling, invasive species,
and aquatic food webs: San Francisco Estuary and comparative systems, Rev.
Fish. Sci., 19, 358–417, https://doi.org/10.1080/10641262.2011.611916, 2011.
Gohin, F.: Répartition spatio-temporelle de la chlorophylle a.
Sous-région marine Golfe de Gascogne, Evaluation initiale DCSMM, 13 pp.,
Ifremer, Brest, France, 2012 (in French).
Goubert, E., Frenod, E., Peeters, P., Thuillier, P., Vested, H. J., and
Bernard, N.: The use of altimetric data (Altus) in the characterization of
hydrodynamic climates controlling hydrosedimentary processes of intertidal
mudflat: the Vilaine estuary case (Brittany, France), Revue Paralia, 3,
6.17–6.31, https://doi.org/10.5150/revue-paralia.2010.0066.1-6.15, 2010.
Greening, H. and Janicki, A.: Toward reversal of eutrophic conditions in a
subtropical estuary: water quality and seagrass response to nitrogen loading
reductions in Tampa Bay, Florida, USA, Environ. Manage., 38, 163–178,
https://doi.org/10.1007/s00267-005-0079-4, 2006.
Grimvall, A., von Bromssen, C., and Lindstrom, G.: Using process-based models
to filter out natural variability in observed concentrations of nitrogen and
phosphorus in river water, Environ. Monit. Assess., 186, 5135–5152,
https://doi.org/10.1007/s10661-014-3765-y, 2014.
Grizzetti, B., Bouraoui, F., and Aloe, A.: Changes of nitrogen and phosphorus
loads to European seas, Glob. Change Biol., 18, 769–782,
https://doi.org/10.1111/j.1365-2486.2011.02576.x, 2012.
Guillaud, J.-F., Aminot, A., Delmas, D., Gohin, F., Lunven, M., Labry, C.,
and Herbland, A.: Seasonal variation of riverine nutrient inputs in the
northern Bay of Biscay (France), and patterns of marine phytoplankton
response, J. Marine Syst., 72, 309–319, https://doi.org/10.1016/j.jmarsys.2007.03.010,
2008.
Harvey, A., Jan Koopman, S., and Penzer, J.: Messy Time Series: A Unified
Approach, in: Messy Data, 103–143, Emerald Group Publishing Limited,
Bingley, UK, 1998.
Helsel, D. R. and Hirsch, R. M.: Statistical Methods in Water Resources,
Hydrologic analysis and interpretation: Techniques of Water-Resources
Investigations of the U.S. Geological Survey, Chapter A3, 510 pp., US
Geological Survey, Reston, VA, 2002.
Hernández-Fariñas, T., Soudant, D., Barillé, L., Belin, C.,
Lefebvre, A., and Bacher, C.: Temporal changes in the phytoplankton community
along the French coast of the eastern English Channel and the southern Bight
of the North Sea, ICES J. Mar. Sci., 71, 821–833,
https://doi.org/10.1093/icesjms/fst192, 2014.
Howarth, R., Chan, F., Conley, D. J., Garnier, J., Doney, S. C., Marino, R.,
and Billen, G.: Coupled biogeochemical cycles: eutrophication and hypoxia in
temperate estuaries and coastal marine ecosystems, Front. Ecol. Environ., 9,
18–26, https://doi.org/10.1890/100008, 2011.
INSEE: En Pays de la Loire, une densification de la population plus loin des
villes, Étude no. 74, INSEE Pays de la Loire, Nantes, France, 2009 (in
French).
Istvánovics, V. and Honti, M.: Efficiency of nutrient management in
controlling eutrophication of running waters in the Middle Danube Basin,
Hydrobiologia, 686, 55–71, https://doi.org/10.1007/s10750-012-0999-y, 2012.
Jarvie, H. P., Sharpley, A. N., Withers, P. J., Scott, J. T., Haggard, B. E.,
and Neal, C.: Phosphorus mitigation to control river eutrophication: murky
waters, inconvenient truths, and “postnormal” science, J. Environ. Qual.,
42, 295–304, https://doi.org/10.2134/jeq2012.0085, 2013.
Jeppesen, E., Sondergaard, M., Jensen, J. P., Havens, K. E., Anneville, O.,
Carvalho, L., Coveney, M. F., Deneke, R., Dokulil, M. T., Foy, B. O. B.,
Gerdeaux, D., Hampton, S. E., Hilt, S., Kangur, K., Kohler, J. A. N.,
Lammens, E. H. H. R., Lauridsen, T. L., Manca, M., Miracle, M. R., Moss, B.,
Noges, P., Persson, G., Phillips, G., Portielje, R. O. B., Romo, S.,
Schelske, C. L., Straile, D., Tatrai, I., Willen, E. V. A., and Winder, M.:
Lake responses to reduced nutrient loading – an analysis of contemporary
long-term data from 35 case studies, Freshwater Biol., 50, 1747–1771,
https://doi.org/10.1111/j.1365-2427.2005.01415.x, 2005.
Justić, D., Rabalais, N. N., Turner, R. E., and Dortch, Q.: Changes in
nutrient structure of river-dominated coastal waters: stoichiometric nutrient
balance and its consequences, Estuar. Coast. Shelf S., 40, 339–356,
https://doi.org/10.1016/s0272-7714(05)80014-9, 1995.
Kalman, R. E.: A new approach to linear filtering and prediction problems, J.
Basic Eng.-T. ASME, 82, 35–45, https://doi.org/10.1115/1.3662552, 1960.
Lair, N.: Regards croisés sur l'état de la Loire Moyenne:
potamoplancton et qualité de l'eau, quel enseignement tirer de 20
années d'études?, Hydroécol. Appl., 13, 3–41,
https://doi.org/10.1051/hydro:2001002, 2001.
Lancelot, C., Gypens, N., Billen, G., Garnier, J., and Roubeix, V.: Testing
an integrated river–ocean mathematical tool for linking marine
eutrophication to land use: The Phaeocystis-dominated Belgian coastal zone
(Southern North Sea) over the past 50 years, J. Marine Syst., 64, 216–228,
https://doi.org/10.1016/j.jmarsys.2006.03.010, 2007.
Larroudé, S., Massei, N., Reyes-Marchant, P., Delattre, C., and Humbert,
J. F.: Dramatic changes in a phytoplankton community in response to local and
global pressures: a 24-year survey of the river Loire (France), Glob. Change
Biol., 19, 1620–1631, https://doi.org/10.1111/gcb.12139, 2013.
Lazure, P. and Jegou, A.-M.: 3D modelling of seasonal evolution of Loire and
Gironde plumes on Biscay Bay continental shelf, Oceanol. Acta, 21, 165–177,
https://doi.org/10.1016/s0399-1784(98)80006-6, 1998.
Lazure, P. and Salomon, J. C.: Etude par modèles mathématiques de la
circulation marine entre Quiberon et Noirmoutier, Oceanol. Acta, Vol. Sp.,
93–99, 1991 (in French).
Le Bihan, V., Morineau, B., and Ollivier, P.: Recensement de la
conchyliculture entre 2001 et 2012, résultats et analyses, 177 pp.,
Agreste, Ministère de l'Agriculture et de l'Alimentation, 2013 (in
French).
Lehtoranta, J., Ekholm, P., and Pitkanen, H.: Coastal eutrophication
thresholds: a matter of sediment microbial processes, Ambio, 38, 303–308,
https://doi.org/10.1579/09-A-656.1, 2009.
Leruste, A., Malet, N., Munaron, D., Derolez, V., Hatey, E., Collos, Y., De
Wit, R., and Bec, B.: First steps of ecological restoration in Mediterranean
lagoons: Shifts in phytoplankton communities, Estuar. Coast. Shelf S., 180,
190–203, https://doi.org/10.1016/j.ecss.2016.06.029, 2016.
Lie, A. A., Wong, C. K., Lam, J. Y., Liu, J. H., and Yung, Y. K.: Changes in
the nutrient ratios and phytoplankton community after declines in nutrient
concentrations in a semi-enclosed bay in Hong Kong, Mar. Environ. Res., 71,
178–188, https://doi.org/10.1016/j.marenvres.2011.01.001, 2011.
Loyer, S., Lampert, L., Menesguen, A., Cann, P., and Labasque, T.: Seasonal
evolution of the nutrient pattern on Biscay Bay continental shelf over the
years 1999-2000, Sci. Mar., 70, 31–46, 2006.
Lunven, M., Guillaud, J. F., Youénou, A., Crassous, M. P., Berric, R., Le
Gall, E., Kérouel, R., Labry, C., and Aminot, A.: Nutrient and
phytoplankton distribution in the Loire River plume (Bay of Biscay, France)
resolved by a new Fine Scale Sampler, Estuar. Coast. Shelf S., 65, 94–108,
https://doi.org/10.1016/j.ecss.2005.06.001, 2005.
Ménesguen, A. and Dussauze, M.: Détermination des “bassins
récepteurs” marins des principaux fleuves français de la façade
Manche-Atlantique, et de leurs rôles respectifs dans l'eutrophisation
phyto-planctonique des masses d'eau DCE et des sous-régions DCSMM. Phase
1 (2013): Calcul de scénarios optimaux à partir des “bassins
récepteurs”. Phase 2 (2014): Simulation de scénarios imposés et
des scénarios optimaux, 334 pp., Ifremer, Brest, France, 2015 (in
French).
Ménesguen, A., Desmit, X., Duliere, V., Lacroix, G., Thouvenin, B.,
Thieu, V., and Dussauze, M.: How to avoid eutrophication in coastal seas? A
new approach to derive river-specific combined nitrate and phosphate maximum
concentrations, Sci. Total Environ., 628–629, 400–414,
https://doi.org/10.1016/j.scitotenv.2018.02.025, 2018a.
Ménesguen, A., Dussauze, M., and Dumas, F.: Designing optimal scenarios
of nutrient loading reduction in a WFD/MSFD perspective by using passive
tracers in a biogeochemical-3D model of the English Channel/Bay of Biscay
area, Ocean Coast. Manage., 163, 37–53, https://doi.org/10.1016/j.ocecoaman.2018.06.005,
2018b.
Ménesguen, A., Dussauze, M., Dumas, F., Thouvenin, B., Garnier, V.,
Lecornu, F., and Répécaud, M.: Ecological model of the Bay of Biscay
and English Channel shelf for environmental status assessment part 1:
Nutrients, phytoplankton and oxygen, Ocean Model., 133, 56–78,
https://doi.org/10.1016/j.ocemod.2018.11.002, 2019.
Merceron, M.: Impact du barrage d'Arzal sur la qualité des eaux de
l'estuaire et de la baie de la Vilaine, 31 pp., Ifremer, Brest, France, 1985
(in French).
Meybeck, M., Cauwet, G., Dessery, S., Somville, M., Gouleau, D., and Billen,
G.: Nutrients (organic C, P, N, Si) in the eutrophic River Loire (France) and
its estuary, Estuar. Coast. Shelf S., 27, 595–624,
https://doi.org/10.1016/0272-7714(88)90071-6, 1988.
Middelburg, J. J. and Nieuwenhuize, J.: Uptake of dissolved inorganic
nitrogen in turbid, tidal estuaries, Mar. Ecol.-Prog. Ser., 192, 79–88,
https://doi.org/10.3354/meps192079, 2000.
Middelburg, J. J., Klaver, G., Nieuwenhuize, J., Wielemaker, A., de Haas, W.,
Vlug, T., and van der Nat, J.: Organic matter mineralization in intertidal
sediments along an estuarine gradient, Mar. Ecol.-Prog. Ser., 132, 157–168,
https://doi.org/10.3354/meps132157, 1996.
Minaudo, C., Meybeck, M., Moatar, F., Gassama, N., and Curie, F.:
Eutrophication mitigation in rivers: 30 years of trends in spatial and
seasonal patterns of biogeochemistry of the Loire River (1980–2012),
Biogeosciences, 12, 2549–2563, https://doi.org/10.5194/bg-12-2549-2015,
2015.
Moatar, F. and Dupont, N.: La Loire Fluviale et Estuarienne – Un Milieu en
Évolution, 320 pp., Éditions Quae, Versailles, France, 2016.
Molenat, J. and Gascuel-Odoux, C.: Modelling flow and nitrate transport in
groundwater for the prediction of water travel times and of consequences of
land use evolution on water quality, Hydrol. Process., 16, 479–492,
https://doi.org/10.1002/hyp.328, 2002.
OSPAR: Eutrophication Status of the OSPAR Maritime Area, 166 pp., OSPAR
Commission, London, UK, 2017.
Paerl, H. W.: Controlling eutrophication along the freshwater–marine
continuum: dual nutrient (N and P) reductions are essential, Estuar. Coast.,
32, 593–601, https://doi.org/10.1007/s12237-009-9158-8, 2009.
Paerl, H. W.: Why does N-limitation persist in the world's marine waters?,
Mar. Chem., 206, 1–6, https://doi.org/10.1016/j.marchem.2018.09.001, 2018.
Paerl, H. W., Valdes, L. M., Joyner, A. R., Piehler, M. F., and Lebo, M. E.:
Solving problems resulting from solutions: evolution of a dual nutrient
management strategy for the eutrophying Neuse River Estuary, North Carolina,
Environ. Sci. Technol., 38, 3068–3073, https://doi.org/10.1021/es0352350, 2004.
Paerl, H. W., Scott, J. T., McCarthy, M. J., Newell, S. E., Gardner, W. S.,
Havens, K. E., Hoffman, D. K., Wilhelm, S. W., and Wurtsbaugh, W. A.: It
takes two to tango: When and where dual nutrient (N & P) reductions are
needed to protect lakes and downstream ecosystems, Environ. Sci. Technol.,
50, 10805–10813, https://doi.org/10.1021/acs.est.6b02575, 2016.
Petris, G.: An R package for dynamic linear models, J. Stat. Softw., 36,
1–16, https://doi.org/10.18637/jss.v036.i12, 2010.
Pitkänen, H., Lehtoranta, J., and Raike, A.: Internal nutrient fluxes
counteract decreases in external load: the case of the estuarial eastern Gulf
of Finland, Baltic Sea, Ambio, 30, 195–201,
https://doi.org/10.1579/0044-7447-30.4.195, 2001.
Poisvert, C., Curie, F., and Moatar, F.: Annual agricultural N surplus in
France over a 70-year period, Nutr. Cycl. Agroecosys., 107, 63–78,
https://doi.org/10.1007/s10705-016-9814-x, 2016.
Racault, M. F., Sathyendranath, S., Menon, N., and Platt, T.: Phenological
responses to ENSO in the global oceans, Surv. Geophys., 38, 277–293,
https://doi.org/10.1007/s10712-016-9391-1, 2017.
Radach, G. and Pätsch, J.: Variability of continental riverine freshwater
and nutrient inputs into the North Sea for the years 1977–2000 and its
consequences for the assessment of eutrophication, Estuar. Coast., 30,
66–81, https://doi.org/10.1007/bf02782968, 2007.
Ratmaya, W.: Rôle des sédiments dans le cycle des nutriments et
impacts sur l'eutrophisation des écosystèmes côtiers, PhD Thesis,
Université de Nantes, 212 pp., 2018 (in French).
R Development Core Team: R: A Language and Environment for Statistical
Computing. R Foundation for Statistical Computing, Vienna, Austria, available
at: https://www.R-project.org/ (last access: 15 June 2016), 2016.
Redfield, A. C.: The biological control of chemical factors in the
environment, Am. Sci., 46, 205–221, 1958.
REPHY: REPHY dataset – French Observation and Monitoring program for
Phytoplankton and Hydrology in coastal waters, 1987–2016 Metropolitan data,
https://doi.org/10.17882/47248, 2017.
Rochet, M., Trenkel, V., Bellail, R., Coppin, F., Lepape, O., Mahe, J.,
Morin, J., Poulard, J., Schlaich, I., and Souplet, A.: Combining indicator
trends to assess ongoing changes in exploited fish communities: diagnostic of
communities off the coasts of France, ICES J. Mar. Sci., 62, 1647–1664,
https://doi.org/10.1016/j.icesjms.2005.06.009, 2005.
Romero, E., Garnier, J., Lassaletta, L., Billen, G., Le Gendre, R., Riou, P.,
and Cugier, P.: Large-scale patterns of river inputs in southwestern Europe:
seasonal and interannual variations and potential eutrophication effects at
the coastal zone, Biogeochemistry, 113, 481–505,
https://doi.org/10.1007/s10533-012-9778-0, 2013.
Romero, E., Le Gendre, R., Garnier, J., Billen, G., Fisson, C., Silvestre,
M., and Riou, P.: Long-term water quality in the lower Seine: Lessons learned
over 4 decades of monitoring, Environ. Sci. Policy, 58, 141–154,
https://doi.org/10.1016/j.envsci.2016.01.016, 2016.
Ryther, J. H. and Dunstan, W. M.: Nitrogen, phosphorus, and eutrophication in
the coastal marine environment, Science, 171, 1008–1013,
https://doi.org/10.1126/science.171.3975.1008, 1971.
Scheuerell, M. D., Schindler, D. E., Litt, A. H., and Edmondson, W. T.:
Environmental and algal forcing of Daphnia production dynamics,
Limnol. Oceanogr., 47, 1477–1485, https://doi.org/10.4319/lo.2002.47.5.1477, 2002.
Schindler, D. W.: The dilemma of controlling cultural eutrophication of
lakes, P. Roy. Soc. B-Biol. Sci., 279, 4322–4333,
https://doi.org/10.1098/rspb.2012.1032, 2012.
Schindler, D. W., Hecky, R. E., Findlay, D. L., Stainton, M. P., Parker, B.
R., Paterson, M. J., Beaty, K. G., Lyng, M., and Kasian, S. E.:
Eutrophication of lakes cannot be controlled by reducing nitrogen input:
results of a 37-year whole-ecosystem experiment, P. Natl. Acad. Sci. USA,
105, 11254–11258, https://doi.org/10.1073/pnas.0805108105, 2008.
Schindler, D. W., Carpenter, S. R., Chapra, S. C., Hecky, R. E., and Orihel,
D. M.: Reducing phosphorus to curb lake eutrophication is a success, Environ.
Sci. Technol., 50, 8923–8929, https://doi.org/10.1021/acs.est.6b02204, 2016.
Seitzinger, S., Harrison, J. A., Bohlke, J. K., Bouwman, A. F., Lowrance, R.,
Peterson, B., Tobias, C., and Van Drecht, G.: Denitrification across
landscapes and waterscapes: a synthesis, Ecol. Appl., 16, 2064–2090,
https://doi.org/10.1890/1051-0761(2006)016[2064:DALAWA]2.0.CO;2, 2006.
Soetaert, K. and Middelburg, J. J.: Modeling eutrophication and
oligotrophication of shallow-water marine systems: the importance of
sediments under stratified and well-mixed conditions, in: Eutrophication in
Coastal Ecosystems, edited by: Andersen, J. H. and Conley, D. J.,
Developments in Hydrobiology, Springer, the Netherlands, 239–254, 2009.
Søndergaard, M., Jeppesen, E., Lauridsen, T. L., Skov, C., Van Nes, E. H.,
Roijackers, R., Lammens, E., and Portielje, R. O. B.: Lake restoration:
successes, failures and long-term effects, J. Appl. Ecol., 44, 1095–1105,
https://doi.org/10.1111/j.1365-2664.2007.01363.x, 2007.
Souchu, P., Vaquer, A., Collos, Y., Landrein, S., Deslous-Paoli, J. M., and
Bibent, B.: Influence of shellfish farming activities on the biogeochemical
composition of the water column in Thau lagoon, Mar. Ecol.-Prog. Ser., 218,
141–152, https://doi.org/10.3354/meps218141, 2001.
Soudant, D., Beliaeff, B., and Thomas, G.: Explaining Dinophysis cf.
acuminata abundance in Antifer (Normandy, France) using dynamic linear
regression, Mar. Ecol.-Prog. Ser., 156, 67–74, https://doi.org/10.3354/meps156067, 1997.
Sournia, A., Chrdtiennot-Dinet, M. J., and Ricard, M.: Marine phytoplankton:
how many species in the world ocean?, J. Plankton. Res., 13, 1093–1099,
https://doi.org/10.1093/plankt/13.5.1093, 1991.
Statham, P. J.: Nutrients in estuaries – an overview and the potential
impacts of climate change, Sci. Total Environ., 434, 213–227,
https://doi.org/10.1016/j.scitotenv.2011.09.088, 2012.
Tamminen, T. and Andersen, T.: Seasonal phytoplankton nutrient limitation
patterns as revealed by bioassays over Baltic Sea gradients of salinity and
eutrophication, Mar. Ecol.-Prog. Ser., 340, 121–138, https://doi.org/10.3354/meps340121,
2007.
Taylor, C., Pedregal, D., Young, P., and Tych, W.: Environmental time series
analysis and forecasting with the Captain toolbox, Environ. Modell. Softw.,
22, 797–814, https://doi.org/10.1016/j.envsoft.2006.03.002, 2007.
Thackeray, S. J., Jones, I. D., and Maberly, S. C.: Long-term change in the
phenology of spring phytoplankton: species-specific responses to nutrient
enrichment and climatic change, J. Ecol., 96, 523–535,
https://doi.org/10.1111/j.1365-2745.2008.01355.x, 2008.
Traini, C., Proust, J. N., Menier, D., and Mathew, M. J.: Distinguishing
natural evolution and human impact on estuarine morpho-sedimentary
development: A case study from the Vilaine Estuary, France, Estuar. Coast.
Shelf S., 163, 143–155, https://doi.org/10.1016/j.ecss.2015.06.025, 2015.
Utermöhl, H.: Zur Vervollkommnung der quantitativen
Phytoplankton-Methodik, Mitteilungen Internationale Vereinigung Theoretische
und Angewandte Limnologie, 9, 1–38, 1958.
Vannote, R. L., Minshall, G. W., Cummins, K. W., Sedell, J. R., and Cushing,
C. E.: The river continuum concept, Can. J. Fish Aquat. Sci., 37, 130–137,
https://doi.org/10.1139/f80-017, 1980.
Wang, B., Xin, M., Wei, Q., and Xie, L.: A historical overview of coastal
eutrophication in the China Seas, Mar. Pollut. Bull., 136, 394–400,
https://doi.org/10.1016/j.marpolbul.2018.09.044, 2018.
Weckström, K., Korhola, A., and Weckström, J.: Impacts of
eutrophication on diatom life forms and species richness in coastal waters of
the Baltic Sea, Ambio, 36, 155–160, 2007.
West, M. and Harrison, J.: Bayesian Forecasting and Dynamic Models, 2nd Edn.,
Springer Series in Statistics, Springer-Verlag, New York, 682 pp., 1997.
Yamamoto, T.: The Seto Inland Sea – eutrophic or oligotrophic?, Mar. Pollut.
Bull., 47, 37–42, https://doi.org/10.1016/S0025-326X(02)00416-2, 2003.
Yue, S. and Wang, C. Y.: The Mann-Kendall test modified by effective sample
size to detect trend in serially correlated hydrological series, Water
Resour. Manag., 18, 201–218, https://doi.org/10.1023/B:Warm.0000043140.61082.60, 2004.
Yung, Y. K., Wong, C. K., Broom, M. J., Ogden, J. A., Chan, S. C. M., and
Leung, Y.: Long-term changes in hydrography, nutrients and phytoplankton in
Tolo Harbour, Hong Kong, Hydrobiologia, 352, 107–115,
https://doi.org/10.1023/a:1003021831076, 1997.
Short summary
This work reports the consequences of nutrient management strategy, an example from southwestern Europe focused mainly on P reduction. Upstream rivers reveal indices of recoveries following the significant diminution of P, while eutrophication continues to increase downstream, especially when N is the limiting factor. This long-term ecosystem-scale analysis provides more arguments for a dual-nutrient (N and P) management strategy to mitigate eutrophication along the freshwater–marine continuum.
This work reports the consequences of nutrient management strategy, an example from southwestern...
Altmetrics
Final-revised paper
Preprint