Articles | Volume 15, issue 7
https://doi.org/10.5194/bg-15-2055-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/bg-15-2055-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
09 Apr 2018
Research article |
| 09 Apr 2018
| 09 Apr 2018
Variability in copepod trophic levels and feeding selectivity based on stable isotope analysis in Gwangyang Bay of the southern coast of the Korean Peninsula
Mianrun Chen
South China Sea Institute of Planning and Environmental Research,
South China Sea Branch, SOA, Guangzhou, P.R. China
School of Earth Sciences & Environmental Engineering, Gwangju
Institute of Science and Technology, Gwangju 61005, Republic of Korea
Dongyoung Kim
School of Earth Sciences & Environmental Engineering, Gwangju
Institute of Science and Technology, Gwangju 61005, Republic of Korea
Hongbin Liu
Division of Life Science, The Hong Kong University of Science and
Technology, Clear Water Bay, Kowloon, Hong Kong SAR, China
Chang-Keun Kang
CORRESPONDING AUTHOR
School of Earth Sciences & Environmental Engineering, Gwangju
Institute of Science and Technology, Gwangju 61005, Republic of Korea
Related authors
No articles found.
Zhibo Shao, Yangchun Xu, Hua Wang, Weicheng Luo, Lice Wang, Yuhong Huang, Nona Sheila R. Agawin, Ayaz Ahmed, Mar Benavides, Mikkel Bentzon-Tilia, Ilana Berman-Frank, Hugo Berthelot, Isabelle C. Biegala, Mariana B. Bif, Antonio Bode, Sophie Bonnet, Deborah A. Bronk, Mark V. Brown, Lisa Campbell, Douglas G. Capone, Edward J. Carpenter, Nicolas Cassar, Bonnie X. Chang, Dreux Chappell, Yuh-ling Lee Chen, Matthew J. Church, Francisco M. Cornejo-Castillo, Amália Maria Sacilotto Detoni, Scott C. Doney, Cecile Dupouy, Marta Estrada, Camila Fernandez, Bieito Fernández-Castro, Debany Fonseca-Batista, Rachel A. Foster, Ken Furuya, Nicole Garcia, Kanji Goto, Jesús Gago, Mary R. Gradoville, M. Robert Hamersley, Britt A. Henke, Cora Hörstmann, Amal Jayakumar, Zhibing Jiang, Shuh-Ji Kao, David M. Karl, Leila R. Kittu, Angela N. Knapp, Sanjeev Kumar, Julie LaRoche, Hongbin Liu, Jiaxing Liu, Caroline Lory, Carolin R. Löscher, Emilio Marañón, Lauren F. Messer, Matthew M. Mills, Wiebke Mohr, Pia H. Moisander, Claire Mahaffey, Robert Moore, Beatriz Mouriño-Carballido, Margaret R. Mulholland, Shin-ichiro Nakaoka, Joseph A. Needoba, Eric J. Raes, Eyal Rahav, Teodoro Ramírez-Cárdenas, Christian Furbo Reeder, Lasse Riemann, Virginie Riou, Julie C. Robidart, Vedula V. S. S. Sarma, Takuya Sato, Himanshu Saxena, Corday Selden, Justin R. Seymour, Dalin Shi, Takuhei Shiozaki, Arvind Singh, Rachel E. Sipler, Jun Sun, Koji Suzuki, Kazutaka Takahashi, Yehui Tan, Weiyi Tang, Jean-Éric Tremblay, Kendra Turk-Kubo, Zuozhu Wen, Angelicque E. White, Samuel T. Wilson, Takashi Yoshida, Jonathan P. Zehr, Run Zhang, Yao Zhang, and Ya-Wei Luo
Earth Syst. Sci. Data, 15, 3673–3709, https://doi.org/10.5194/essd-15-3673-2023, https://doi.org/10.5194/essd-15-3673-2023, 2023
Short summary
Short summary
N2 fixation by marine diazotrophs is an important bioavailable N source to the global ocean. This updated global oceanic diazotroph database increases the number of in situ measurements of N2 fixation rates, diazotrophic cell abundances, and nifH gene copy abundances by 184 %, 86 %, and 809 %, respectively. Using the updated database, the global marine N2 fixation rate is estimated at 223 ± 30 Tg N yr−1, which triplicates that using the original database.
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.
Yanhong Lu, Shunyan Cheung, Ling Chen, Shuh-Ji Kao, Xiaomin Xia, Jianping Gan, Minhan Dai, and Hongbin Liu
Biogeosciences, 17, 6017–6032, https://doi.org/10.5194/bg-17-6017-2020, https://doi.org/10.5194/bg-17-6017-2020, 2020
Short summary
Short summary
Through a comprehensive investigation, we observed differential niche partitioning among diverse ammonia-oxidizing archaea (AOA) sublineages in a typical subtropical estuary. Distinct AOA communities observed at DNA and RNA levels suggested that a strong divergence in ammonia-oxidizing activity among different AOA groups occurs. Our result highlights the importance of identifying major ammonia oxidizers at RNA level in future studies.
Juan Yao, Juying Wang, Hongbin Liu, and Kedong Yin
Biogeosciences Discuss., https://doi.org/10.5194/bg-2020-188, https://doi.org/10.5194/bg-2020-188, 2020
Preprint withdrawn
Short summary
Short summary
Our study finds that winds appear to be a dominant regulating force on the formation of hypoxia in the Pearl River estuarine waters. The wind speed > 6 m/s appears to a threshold above which the water column stratification is destroyed and the formation of bottom hypoxia is interrupted. The frequency of such the above-threshold wind events decreases significantly, implying that climate change induced variability in wind speeds can exasperate the coastal formation of bottom hypoxia in the region.
Jang Han Lee, Dabin Lee, Jae Joong Kang, Hui Tae Joo, Jae Hyung Lee, Ho Won Lee, So Hyun Ahn, Chang Keun Kang, and Sang Heon Lee
Biogeosciences, 14, 1903–1917, https://doi.org/10.5194/bg-14-1903-2017, https://doi.org/10.5194/bg-14-1903-2017, 2017
Short summary
Short summary
Based on the seasonal biochemical compositions in this study, the calorific contents of the food material were 1.0–6.1 Kcal m−3. We found that a major governing factor in the biochemical composition of POM was dissolved inorganic nitrogen loading from river input. The relatively larger amount of food material and the higher calorific content of the POM found in this study reflected good nutritive conditions for sustaining productive shellfish and fish populations in Gwangyang Bay, South Korea.
Hongbin Liu and Chih-Jung Wu
Biogeosciences, 13, 4767–4775, https://doi.org/10.5194/bg-13-4767-2016, https://doi.org/10.5194/bg-13-4767-2016, 2016
Short summary
Short summary
The transport of organic C from the surface to the deep ocean by sinking particles composed of remains of dead cells and zooplankton fecal pellets can reduce the atmospheric CO2. Study of the effect of the silica content of diatoms, one of the most important primary products, on the production, degradation and sinking of its fecal pellets provides a better understanding of the complexity and variability of the planktonic food web and its implication on the vertical flux of C in the global ocean.
H. Jing, E. Rocke, L. Kong, X. Xia, H. Liu, and M. R. Landry
Biogeosciences Discuss., https://doi.org/10.5194/bgd-12-13483-2015, https://doi.org/10.5194/bgd-12-13483-2015, 2015
Manuscript not accepted for further review
Short summary
Short summary
Photosynthetic Dinoflagellates predominated in the surface, while potential parasitic Dinoflagellates and Ciliates dominated in the OMZ and deeper water in Costa Rica Dome. Total and active protists in the anoxic core were distinct from those in others depths. Reduced community diversity and presence of parasitic/symbiotic trophic lifestyles in the suboxic/anoxic OMZ suggests that oxygen deficiency could cause a change of protist community and the associated microbial food web as well.
K.-K. Liu, C.-K. Kang, T. Kobari, H. Liu, C. Rabouille, and K. Fennel
Biogeosciences, 11, 7061–7075, https://doi.org/10.5194/bg-11-7061-2014, https://doi.org/10.5194/bg-11-7061-2014, 2014
Short summary
Short summary
This paper provides background info on the East China Sea, Japan/East Sea and South China Sea and highlights major findings in the special issue on their biogeochemical conditions and ecosystem functions. The three seas are subject to strong impacts from human activities and/or climate forcing. Because these continental margins sustain arguably some of the most productive marine ecosystems in the world, changes in these stressed ecosystems may threaten the livelihood of a large human population.
K. Suzuki, A. Hattori-Saito, Y. Sekiguchi, J. Nishioka, M. Shigemitsu, T. Isada, H. Liu, and R. M. L. McKay
Biogeosciences, 11, 2503–2517, https://doi.org/10.5194/bg-11-2503-2014, https://doi.org/10.5194/bg-11-2503-2014, 2014
C. Guo, H. Liu, L. Zheng, S. Song, B. Chen, and B. Huang
Biogeosciences, 11, 1847–1862, https://doi.org/10.5194/bg-11-1847-2014, https://doi.org/10.5194/bg-11-1847-2014, 2014
Y.-T. Son, K.-I. Chang, S.-T. Yoon, T. Rho, J. H. Kwak, C. K. Kang, and K.-R. Kim
Biogeosciences, 11, 1319–1329, https://doi.org/10.5194/bg-11-1319-2014, https://doi.org/10.5194/bg-11-1319-2014, 2014
C.-C. Lai, Y.-W. Fu, H.-B. Liu, H.-Y. Kuo, K.-W. Wang, C.-H. Lin, J.-H. Tai, G. T. F. Wong, K.-Y. Lee, T.-Y. Chen, Y. Yamamoto, M.-F. Chow, Y. Kobayashi, C.-Y. Ko, and F.-K. Shiah
Biogeosciences, 11, 147–156, https://doi.org/10.5194/bg-11-147-2014, https://doi.org/10.5194/bg-11-147-2014, 2014
J. H. Kwak, S. H. Lee, H. J. Park, E. J. Choy, H. D. Jeong, K. R. Kim, and C. K. Kang
Biogeosciences, 10, 4405–4417, https://doi.org/10.5194/bg-10-4405-2013, https://doi.org/10.5194/bg-10-4405-2013, 2013
Related subject area
Biodiversity and Ecosystem Function: Marine
Reefal ostracod assemblages from the Zanzibar Archipelago (Tanzania)
Composite calcite and opal test in Foraminifera (Rhizaria)
Influence of oxygen minimum zone on macrobenthic community structure in the northern Benguela Upwelling System: a macro-nematode perspective
Simulated terrestrial runoff shifts the metabolic balance of a coastal Mediterranean plankton community towards heterotrophy
Contrasting carbon cycling in the benthic food webs between a river-fed, high-energy canyon and an upper continental slope
A critical trade-off between nitrogen quota and growth allows Coccolithus braarudii life cycle phases to exploit varying environment
Structural complexity and benthic metabolism: resolving the links between carbon cycling and biodiversity in restored seagrass meadows
Planktic foraminifera assemblage composition and flux dynamics inferred from an annual sediment trap record in the Central Mediterranean Sea
Building your own mountain: the effects, limits, and drawbacks of cold-water coral ecosystem engineering
Viability of coastal fish larvae under ocean alkalinity enhancement: from organisms to communities
Phytoplankton response to increased nickel in the context of ocean alkalinity enhancement
Diversity and density relationships between lebensspuren and tracemaking organisms: a study case from abyssal northwest Pacific
Technical note: An autonomous flow-through salinity and temperature perturbation mesocosm system for multi-stressor experiments
Reviews and syntheses: The clam before the storm – a meta-analysis showing the effect of combined climate change stressors on bivalves
A step towards measuring connectivity in the deep sea: elemental fingerprints of mollusk larval shells discriminate hydrothermal vent sites
Spawner weight and ocean temperature drive Allee effect dynamics in Atlantic cod, Gadus morhua: inherent and emergent density regulation
Bacterioplankton dark CO2 fixation in oligotrophic waters
The bottom mixed layer depth as an indicator of subsurface Chlorophyll a distribution
Ideas and perspectives: The fluctuating nature of oxygen shapes the ecology of aquatic habitats and their biogeochemical cycles – the aquatic oxyscape
Impact of deoxygenation and warming on global marine species in the 21st century
Ecological divergence of a mesocosm in an eastern boundary upwelling system assessed with multi-marker environmental DNA metabarcoding
Unique benthic foraminiferal communities (stained) in diverse environments of sub-Antarctic fjords, South Georgia
Upwelled plankton community modulates surface bloom succession and nutrient availability in a natural plankton assemblage
First phytoplankton community assessment of the Kong Håkon VII Hav, Southern Ocean, during austral autumn
Early life stages of a Mediterranean coral are vulnerable to ocean warming and acidification
Mediterranean seagrasses as carbon sinks: methodological and regional differences
Contrasting vertical distributions of recent planktic foraminifera off Indonesia during the southeast monsoon: implications for paleoceanographic reconstructions
The onset of the spring phytoplankton bloom in the coastal North Sea supports the Disturbance Recovery Hypothesis
Species richness and functional attributes of fish assemblages across a large-scale salinity gradient in shallow coastal areas
Modeling the growth and sporulation dynamics of the macroalga Ulva in mixed-age populations in cultivation and the formation of green tides
Spatial changes in community composition and food web structure of mesozooplankton across the Adriatic basin (Mediterranean Sea)
Predicting mangrove forest dynamics across a soil salinity gradient using an individual-based vegetation model linked with plant hydraulics
Will daytime community calcification reflect reef accretion on future, degraded coral reefs?
Modeling polar marine ecosystem functions guided by bacterial physiological and taxonomic traits
Quantifying functional consequences of habitat degradation on a Caribbean coral reef
Enhanced chlorophyll-a concentration in the wake of Sable Island, eastern Canada, revealed by two decades of satellite observations: a response to grey seal population dynamics?
Population dynamics and reproduction strategies of planktonic foraminifera in the open ocean
The Bouraké semi-enclosed lagoon (New Caledonia) – a natural laboratory to study the lifelong adaptation of a coral reef ecosystem to extreme environmental conditions
Atypical, high-diversity assemblages of foraminifera in a mangrove estuary in northern Brazil
Permanent ectoplasmic structures in deep-sea Cibicides and Cibicidoides taxa – long-term observations at in situ pressure
Ideas and perspectives: Ushering the Indian Ocean into the UN Decade of Ocean Science for Sustainable Development (UNDOSSD) through marine ecosystem research and operational services – an early career's take
Persistent effects of sand extraction on habitats and associated benthic communities in the German Bight
Spatial patterns of ectoenzymatic kinetics in relation to biogeochemical properties in the Mediterranean Sea and the concentration of the fluorogenic substrate used
A 2-decade (1988–2009) record of diatom fluxes in the Mauritanian coastal upwelling: impact of low-frequency forcing and a two-step shift in the species composition
Review and syntheses: Impacts of turbidity flows on deep-sea benthic communities
Ideas and perspectives: When ocean acidification experiments are not the same, repeatability is not tested
The effect of the salinity, light regime and food source on carbon and nitrogen uptake in a benthic foraminifer
Changes in population depth distribution and oxygen stratification are involved in the current low condition of the eastern Baltic Sea cod (Gadus morhua)
Effects of spatial variability on the exposure of fish to hypoxia: a modeling analysis for the Gulf of Mexico
Plant genotype determines biomass response to flooding frequency in tidal wetlands
Skye Yunshu Tian, Martin Langer, Moriaki Yasuhara, and Chih-Lin Wei
Biogeosciences, 21, 3523–3536, https://doi.org/10.5194/bg-21-3523-2024, https://doi.org/10.5194/bg-21-3523-2024, 2024
Short summary
Short summary
Through the first large-scale study of meiobenthic ostracods from the diverse and productive reef ecosystem in the Zanzibar Archipelago, Tanzania, we found that the diversity and composition of ostracod assemblages as controlled by benthic habitats and human impacts were indicative of overall reef health, and we highlighted the usefulness of ostracods as a model proxy to monitor and understand the degradation of reef ecosystems from the coral-dominated phase to the algae-dominated phase.
Julien Richirt, Satoshi Okada, Yoshiyuki Ishitani, Katsuyuki Uematsu, Akihiro Tame, Kaya Oda, Noriyuki Isobe, Toyoho Ishimura, Masashi Tsuchiya, and Hidetaka Nomaki
Biogeosciences, 21, 3271–3288, https://doi.org/10.5194/bg-21-3271-2024, https://doi.org/10.5194/bg-21-3271-2024, 2024
Short summary
Short summary
We report the first benthic foraminifera with a composite test (i.e. shell) made of opal, which coats the inner part of the calcitic layer. Using comprehensive techniques, we describe the morphology and the composition of this novel opal layer and provide evidence that the opal is precipitated by the foraminifera itself. We explore the potential precipitation process and function(s) of this composite test and further discuss the possible implications for palaeoceanographic reconstructions.
Said Mohamed Hashim, Beth Wangui Waweru, and Agnes Muthumbi
Biogeosciences, 21, 2995–3006, https://doi.org/10.5194/bg-21-2995-2024, https://doi.org/10.5194/bg-21-2995-2024, 2024
Short summary
Short summary
The study investigates the impact of decreasing oxygen in the ocean on macrofaunal communities using the BUS as an example. It identifies distinct shifts in community composition and feeding guilds across oxygen zones, with nematodes dominating dysoxic areas. These findings underscore the complex responses of benthic organisms to oxygen gradients, crucial for understanding ecosystem dynamics in hypoxic environments and their implications for marine biodiversity and sustainability.
Tanguy Soulié, Francesca Vidussi, Justine Courboulès, Marie Heydon, Sébastien Mas, Florian Voron, Carolina Cantoni, Fabien Joux, and Behzad Mostajir
Biogeosciences, 21, 1887–1902, https://doi.org/10.5194/bg-21-1887-2024, https://doi.org/10.5194/bg-21-1887-2024, 2024
Short summary
Short summary
Due to climate change, it is projected that extreme rainfall events, which bring terrestrial matter into coastal seas, will occur more frequently in the Mediterranean region. To test the effects of runoffs of terrestrial matter on plankton communities from Mediterranean coastal waters, an in situ mesocosm experiment was conducted. The simulated runoff affected key processes mediated by plankton, such as primary production and respiration, suggesting major consequences of such events.
Chueh-Chen Tung, Yu-Shih Lin, Jian-Xiang Liao, Tzu-Hsuan Tu, James T. Liu, Li-Hung Lin, Pei-Ling Wang, and Chih-Lin Wei
Biogeosciences, 21, 1729–1756, https://doi.org/10.5194/bg-21-1729-2024, https://doi.org/10.5194/bg-21-1729-2024, 2024
Short summary
Short summary
This study contrasts seabed food webs between a river-fed, high-energy canyon and the nearby slope. We show higher organic carbon (OC) flows through the canyon than the slope. Bacteria dominated the canyon, while seabed fauna contributed more to the slope food web. Due to frequent perturbation, the canyon had a lower faunal stock and OC recycling. Only 4 % of the seabed OC flux enters the canyon food web, suggesting a significant role of the river-fed canyon in transporting OC to the deep sea.
Joost de Vries, Fanny Monteiro, Gerald Langer, Colin Brownlee, and Glen Wheeler
Biogeosciences, 21, 1707–1727, https://doi.org/10.5194/bg-21-1707-2024, https://doi.org/10.5194/bg-21-1707-2024, 2024
Short summary
Short summary
Calcifying phytoplankton (coccolithophores) utilize a life cycle in which they can grow and divide into two different phases. These two phases (HET and HOL) vary in terms of their physiology and distributions, with many unknowns about what the key differences are. Using a combination of lab experiments and model simulations, we find that nutrient storage is a critical difference between the two phases and that this difference allows them to inhabit different nitrogen input regimes.
Theodor Kindeberg, Karl Michael Attard, Jana Hüller, Julia Müller, Cintia Organo Quintana, and Eduardo Infantes
Biogeosciences, 21, 1685–1705, https://doi.org/10.5194/bg-21-1685-2024, https://doi.org/10.5194/bg-21-1685-2024, 2024
Short summary
Short summary
Seagrass meadows are hotspots for biodiversity and productivity, and planting seagrass is proposed as a tool for mitigating biodiversity loss and climate change. We assessed seagrass planted in different years and found that benthic oxygen and carbon fluxes increased as the seabed developed from bare sediments to a mature seagrass meadow. This increase was partly linked to the diversity of colonizing algae which increased the light-use efficiency of the seagrass meadow community.
Thibauld M. Béjard, Andrés S. Rigual-Hernández, Javier P. Tarruella, José A. Flores, Anna Sanchez Vidal, Irene Llamas Cano, and Francisco J. Sierro
EGUsphere, https://doi.org/10.5194/egusphere-2023-3101, https://doi.org/10.5194/egusphere-2023-3101, 2024
Short summary
Short summary
The Mediterranean Sea is considered a climate change hotspot. Documenting planktic foraminifera population is crucial. In the Sicily Strait, fluxes are higher during winter and positively linked with chlorophyll-a concentration and cool temperatures. A comparison with other Mediterranean sites shows the transitional aspect of the studied zone. Finally, modern populations significantly differ from those in the sediment, highlighting a possible effect of environmental change.
Anna-Selma van der Kaaden, Sandra R. Maier, Siluo Chen, Laurence H. De Clippele, Evert de Froe, Theo Gerkema, Johan van de Koppel, Furu Mienis, Christian Mohn, Max Rietkerk, Karline Soetaert, and Dick van Oevelen
Biogeosciences, 21, 973–992, https://doi.org/10.5194/bg-21-973-2024, https://doi.org/10.5194/bg-21-973-2024, 2024
Short summary
Short summary
Combining hydrodynamic simulations and annotated videos, we separated which hydrodynamic variables that determine reef cover are engineered by cold-water corals and which are not. Around coral mounds, hydrodynamic zones seem to create a typical reef zonation, restricting corals from moving deeper (the expected response to climate warming). But non-engineered downward velocities in winter (e.g. deep winter mixing) seem more important for coral reef growth than coral engineering.
Silvan Urs Goldenberg, Ulf Riebesell, Daniel Brüggemann, Gregor Börner, Michael Sswat, Arild Folkvord, Maria Couret, Synne Spjelkavik, Nicolás Sánchez, Cornelia Jaspers, and Marta Moyano
EGUsphere, https://doi.org/10.5194/egusphere-2024-286, https://doi.org/10.5194/egusphere-2024-286, 2024
Short summary
Short summary
Ocean alkalinity enhancement (OAE) is being evaluated as carbon dioxide removal technology for climate change mitigation. With experiments on single species and species communities, we show that fish larvae can be resilient to the resulting perturbation of seawater. Larvae may hence recruit successfully and continue to support fisheries production in regions of OAE. Our findings for fish and marine food webs help to establish an environmentally safe operating space for this ocean-based solution.
Xiaoke Xin, Giulia Faucher, and Ulf Riebesell
Biogeosciences, 21, 761–772, https://doi.org/10.5194/bg-21-761-2024, https://doi.org/10.5194/bg-21-761-2024, 2024
Short summary
Short summary
Ocean alkalinity enhancement (OAE) is a promising approach to remove CO2 by accelerating natural rock weathering. However, some of the alkaline substances contain trace metals which could be toxic to marine life. By exposing three representative phytoplankton species to Ni released from alkaline materials, we observed varying responses of phytoplankton to nickel concentrations, suggesting caution should be taken and toxic thresholds should be avoided in OAE with Ni-rich materials.
Olmo Miguez-Salas, Angelika Brandt, Henry Knauber, and Torben Riehl
Biogeosciences, 21, 641–655, https://doi.org/10.5194/bg-21-641-2024, https://doi.org/10.5194/bg-21-641-2024, 2024
Short summary
Short summary
In the deep sea, the interaction between benthic fauna (tracemakers) and substrate can be preserved as traces (i.e. lebensspuren), which are common features of seafloor landscapes, rendering them promising proxies for inferring biodiversity from marine images. No general correlation was observed between traces and benthic fauna. However, a local correlation was observed between specific stations depending on unknown tracemakers, tracemaker behaviour, and lebensspuren morphotypes.
Cale A. Miller, Pierre Urrutti, Jean-Pierre Gattuso, Steeve Comeau, Anaïs Lebrun, Samir Alliouane, Robert W. Schlegel, and Frédéric Gazeau
Biogeosciences, 21, 315–333, https://doi.org/10.5194/bg-21-315-2024, https://doi.org/10.5194/bg-21-315-2024, 2024
Short summary
Short summary
This work describes an experimental system that can replicate and manipulate environmental conditions in marine or aquatic systems. Here, we show how the temperature and salinity of seawater delivered from a fjord is manipulated to experimental tanks on land. By constantly monitoring temperature and salinity in each tank via a computer program, the system continuously adjusts automated flow valves to ensure the seawater in each tank matches the targeted experimental conditions.
Rachel A. Kruft Welton, George Hoppit, Daniela N. Schmidt, James D. Witts, and Benjamin C. Moon
Biogeosciences, 21, 223–239, https://doi.org/10.5194/bg-21-223-2024, https://doi.org/10.5194/bg-21-223-2024, 2024
Short summary
Short summary
We conducted a meta-analysis of known experimental literature examining how marine bivalve growth rates respond to climate change. Growth is usually negatively impacted by climate change. Bivalve eggs/larva are generally more vulnerable than either juveniles or adults. Available data on the bivalve response to climate stressors are biased towards early growth stages (commercially important in the Global North), and many families have only single experiments examining climate change impacts.
Vincent Mouchi, Christophe Pecheyran, Fanny Claverie, Cécile Cathalot, Marjolaine Matabos, Yoan Germain, Olivier Rouxel, Didier Jollivet, Thomas Broquet, and Thierry Comtet
Biogeosciences, 21, 145–160, https://doi.org/10.5194/bg-21-145-2024, https://doi.org/10.5194/bg-21-145-2024, 2024
Short summary
Short summary
The impact of deep-sea mining will depend critically on the ability of larval dispersal of hydrothermal mollusks to connect and replenish natural populations. However, assessing connectivity is extremely challenging, especially in the deep sea. Here, we investigate the potential of using the chemical composition of larval shells to discriminate larval origins between multiple hydrothermal sites in the southwest Pacific. Our results confirm that this method can be applied with high accuracy.
Anna-Marie Winter, Nadezda Vasilyeva, and Artem Vladimirov
Biogeosciences, 20, 3683–3716, https://doi.org/10.5194/bg-20-3683-2023, https://doi.org/10.5194/bg-20-3683-2023, 2023
Short summary
Short summary
There is an increasing number of fish in poor state, and many do not recover, even when fishing pressure is ceased. An Allee effect can hinder population recovery because it suppresses the fish's productivity at low abundance. With a model fitted to 17 Atlantic cod stocks, we find that ocean warming and fishing can cause an Allee effect. If present, the Allee effect hinders fish recovery. This shows that Allee effects are dynamic, not uncommon, and calls for precautionary management measures.
Afrah Alothman, Daffne López-Sandoval, Carlos M. Duarte, and Susana Agustí
Biogeosciences, 20, 3613–3624, https://doi.org/10.5194/bg-20-3613-2023, https://doi.org/10.5194/bg-20-3613-2023, 2023
Short summary
Short summary
This study investigates bacterial dissolved inorganic carbon (DIC) fixation in the Red Sea, an oligotrophic ecosystem, using stable-isotope labeling and spectroscopy. The research reveals that bacterial DIC fixation significantly contributes to total DIC fixation, in the surface and deep water. The study demonstrates that as primary production decreases, the role of bacterial DIC fixation increases, emphasizing its importance with photosynthesis in estimating oceanic carbon dioxide production.
Arianna Zampollo, Thomas Cornulier, Rory O'Hara Murray, Jacqueline Fiona Tweddle, James Dunning, and Beth E. Scott
Biogeosciences, 20, 3593–3611, https://doi.org/10.5194/bg-20-3593-2023, https://doi.org/10.5194/bg-20-3593-2023, 2023
Short summary
Short summary
This paper highlights the use of the bottom mixed layer depth (BMLD: depth between the end of the pycnocline and the mixed layer below) to investigate subsurface Chlorophyll a (a proxy of primary production) in temperate stratified shelf waters. The strict correlation between subsurface Chl a and BMLD becomes relevant in shelf-productive waters where multiple stressors (e.g. offshore infrastructure) will change the stratification--mixing balance and related carbon fluxes.
Marco Fusi, Sylvain Rigaud, Giovanna Guadagnin, Alberto Barausse, Ramona Marasco, Daniele Daffonchio, Julie Régis, Louison Huchet, Capucine Camin, Laura Pettit, Cristina Vina-Herbon, and Folco Giomi
Biogeosciences, 20, 3509–3521, https://doi.org/10.5194/bg-20-3509-2023, https://doi.org/10.5194/bg-20-3509-2023, 2023
Short summary
Short summary
Oxygen availability in marine water and freshwater is very variable at daily and seasonal scales. The dynamic nature of oxygen fluctuations has important consequences for animal and microbe physiology and ecology, yet it is not fully understood. In this paper, we showed the heterogeneous nature of the aquatic oxygen landscape, which we defined here as the
oxyscape, and we addressed the importance of considering the oxyscape in the modelling and managing of aquatic ecosystems.
Anne L. Morée, Tayler M. Clarke, William W. L. Cheung, and Thomas L. Frölicher
Biogeosciences, 20, 2425–2454, https://doi.org/10.5194/bg-20-2425-2023, https://doi.org/10.5194/bg-20-2425-2023, 2023
Short summary
Short summary
Ocean temperature and oxygen shape marine habitats together with species’ characteristics. We calculated the impacts of projected 21st-century warming and oxygen loss on the contemporary habitat volume of 47 marine species and described the drivers of these impacts. Most species lose less than 5 % of their habitat at 2 °C of global warming, but some species incur losses 2–3 times greater than that. We also calculate which species may be most vulnerable to climate change and why this is the case.
Markus A. Min, David M. Needham, Sebastian Sudek, Nathan Kobun Truelove, Kathleen J. Pitz, Gabriela M. Chavez, Camille Poirier, Bente Gardeler, Elisabeth von der Esch, Andrea Ludwig, Ulf Riebesell, Alexandra Z. Worden, and Francisco P. Chavez
Biogeosciences, 20, 1277–1298, https://doi.org/10.5194/bg-20-1277-2023, https://doi.org/10.5194/bg-20-1277-2023, 2023
Short summary
Short summary
Emerging molecular methods provide new ways of understanding how marine communities respond to changes in ocean conditions. Here, environmental DNA was used to track the temporal evolution of biological communities in the Peruvian coastal upwelling system and in an adjacent enclosure where upwelling was simulated. We found that the two communities quickly diverged, with the open ocean being one found during upwelling and the enclosure evolving to one found under stratified conditions.
Wojciech Majewski, Witold Szczuciński, and Andrew J. Gooday
Biogeosciences, 20, 523–544, https://doi.org/10.5194/bg-20-523-2023, https://doi.org/10.5194/bg-20-523-2023, 2023
Short summary
Short summary
We studied foraminifera living in the fjords of South Georgia, a sub-Antarctic island sensitive to climate change. As conditions in water and on the seafloor vary, different associations of these microorganisms dominate far inside, in the middle, and near fjord openings. Assemblages in inner and middle parts of fjords are specific to South Georgia, but they may become widespread with anticipated warming. These results are important for interpretating fossil records and monitoring future change.
Allanah Joy Paul, Lennart Thomas Bach, Javier Arístegui, Elisabeth von der Esch, Nauzet Hernández-Hernández, Jonna Piiparinen, Laura Ramajo, Kristian Spilling, and Ulf Riebesell
Biogeosciences, 19, 5911–5926, https://doi.org/10.5194/bg-19-5911-2022, https://doi.org/10.5194/bg-19-5911-2022, 2022
Short summary
Short summary
We investigated how different deep water chemistry and biology modulate the response of surface phytoplankton communities to upwelling in the Peruvian coastal zone. Our results show that the most influential drivers were the ratio of inorganic nutrients (N : P) and the microbial community present in upwelling source water. These led to unexpected and variable development in the phytoplankton assemblage that could not be predicted by the amount of inorganic nutrients alone.
Hanna M. Kauko, Philipp Assmy, Ilka Peeken, Magdalena Różańska-Pluta, Józef M. Wiktor, Gunnar Bratbak, Asmita Singh, Thomas J. Ryan-Keogh, and Sebastien Moreau
Biogeosciences, 19, 5449–5482, https://doi.org/10.5194/bg-19-5449-2022, https://doi.org/10.5194/bg-19-5449-2022, 2022
Short summary
Short summary
This article studies phytoplankton (microscopic
plantsin the ocean capable of photosynthesis) in Kong Håkon VII Hav in the Southern Ocean. Different species play different roles in the ecosystem, and it is therefore important to assess the species composition. We observed that phytoplankton blooms in this area are formed by large diatoms with strong silica armors, which can lead to high silica (and sometimes carbon) export to depth and be important prey for krill.
Chloe Carbonne, Steeve Comeau, Phoebe T. W. Chan, Keyla Plichon, Jean-Pierre Gattuso, and Núria Teixidó
Biogeosciences, 19, 4767–4777, https://doi.org/10.5194/bg-19-4767-2022, https://doi.org/10.5194/bg-19-4767-2022, 2022
Short summary
Short summary
For the first time, our study highlights the synergistic effects of a 9-month warming and acidification combined stress on the early life stages of a Mediterranean azooxanthellate coral, Astroides calycularis. Our results predict a decrease in dispersion, settlement, post-settlement linear extention, budding and survival under future global change and that larvae and recruits of A. calycularis are stages of interest for this Mediterranean coral resistance, resilience and conservation.
Iris E. Hendriks, Anna Escolano-Moltó, Susana Flecha, Raquel Vaquer-Sunyer, Marlene Wesselmann, and Núria Marbà
Biogeosciences, 19, 4619–4637, https://doi.org/10.5194/bg-19-4619-2022, https://doi.org/10.5194/bg-19-4619-2022, 2022
Short summary
Short summary
Seagrasses are marine plants with the capacity to act as carbon sinks due to their high primary productivity, using carbon for growth. This capacity can play a key role in climate change mitigation. We compiled and published data showing that two Mediterranean seagrass species have different metabolic rates, while the study method influences the rates of the measurements. Most communities act as carbon sinks, while the western basin might be more productive than the eastern Mediterranean.
Raúl Tapia, Sze Ling Ho, Hui-Yu Wang, Jeroen Groeneveld, and Mahyar Mohtadi
Biogeosciences, 19, 3185–3208, https://doi.org/10.5194/bg-19-3185-2022, https://doi.org/10.5194/bg-19-3185-2022, 2022
Short summary
Short summary
We report census counts of planktic foraminifera in depth-stratified plankton net samples off Indonesia. Our results show that the vertical distribution of foraminifera species routinely used in paleoceanographic reconstructions varies in hydrographically distinct regions, likely in response to food availability. Consequently, the thermal gradient based on mixed layer and thermocline dwellers also differs for these regions, suggesting potential implications for paleoceanographic reconstructions.
Ricardo González-Gil, Neil S. Banas, Eileen Bresnan, and Michael R. Heath
Biogeosciences, 19, 2417–2426, https://doi.org/10.5194/bg-19-2417-2022, https://doi.org/10.5194/bg-19-2417-2022, 2022
Short summary
Short summary
In oceanic waters, the accumulation of phytoplankton biomass in winter, when light still limits growth, is attributed to a decrease in grazing as the mixed layer deepens. However, in coastal areas, it is not clear whether winter biomass can accumulate without this deepening. Using 21 years of weekly data, we found that in the Scottish coastal North Sea, the seasonal increase in light availability triggers the accumulation of phytoplankton biomass in winter, when light limitation is strongest.
Birgit Koehler, Mårten Erlandsson, Martin Karlsson, and Lena Bergström
Biogeosciences, 19, 2295–2312, https://doi.org/10.5194/bg-19-2295-2022, https://doi.org/10.5194/bg-19-2295-2022, 2022
Short summary
Short summary
Understanding species richness patterns remains a challenge for biodiversity management. We estimated fish species richness over a coastal salinity gradient (3–32) with a method that allowed comparing data from various sources. Species richness was 3-fold higher at high vs. low salinity, and salinity influenced species’ habitat preference, mobility and feeding type. If climate change causes upper-layer freshening of the Baltic Sea, further shifts along the identified patterns may be expected.
Uri Obolski, Thomas Wichard, Alvaro Israel, Alexander Golberg, and Alexander Liberzon
Biogeosciences, 19, 2263–2271, https://doi.org/10.5194/bg-19-2263-2022, https://doi.org/10.5194/bg-19-2263-2022, 2022
Short summary
Short summary
The algal genus Ulva plays a major role in coastal ecosystems worldwide and is a promising prospect as an seagriculture crop. A substantial hindrance to cultivating Ulva arises from sudden sporulation, leading to biomass loss. This process is not yet well understood. Here, we characterize the dynamics of Ulva growth, considering the potential impact of sporulation inhibitors, using a mathematical model. Our findings are an essential step towards understanding the dynamics of Ulva growth.
Emanuela Fanelli, Samuele Menicucci, Sara Malavolti, Andrea De Felice, and Iole Leonori
Biogeosciences, 19, 1833–1851, https://doi.org/10.5194/bg-19-1833-2022, https://doi.org/10.5194/bg-19-1833-2022, 2022
Short summary
Short summary
Zooplankton play a key role in marine ecosystems, forming the base of the marine food web and a link between primary producers and higher-order consumers, such as fish. This aspect is crucial in the Adriatic basin, one of the most productive and overexploited areas of the Mediterranean Sea. A better understanding of community and food web structure and their response to water mass changes is essential under a global warming scenario, as zooplankton are sensitive to climate change.
Masaya Yoshikai, Takashi Nakamura, Rempei Suwa, Sahadev Sharma, Rene Rollon, Jun Yasuoka, Ryohei Egawa, and Kazuo Nadaoka
Biogeosciences, 19, 1813–1832, https://doi.org/10.5194/bg-19-1813-2022, https://doi.org/10.5194/bg-19-1813-2022, 2022
Short summary
Short summary
This study presents a new individual-based vegetation model to investigate salinity control on mangrove productivity. The model incorporates plant hydraulics and tree competition and predicts unique and complex patterns of mangrove forest structures that vary across soil salinity gradients. The presented model does not hold an empirical expression of salinity influence on productivity and thus may provide a better understanding of mangrove forest dynamics in future climate change.
Coulson A. Lantz, William Leggat, Jessica L. Bergman, Alexander Fordyce, Charlotte Page, Thomas Mesaglio, and Tracy D. Ainsworth
Biogeosciences, 19, 891–906, https://doi.org/10.5194/bg-19-891-2022, https://doi.org/10.5194/bg-19-891-2022, 2022
Short summary
Short summary
Coral bleaching events continue to drive the degradation of coral reefs worldwide. In this study we measured rates of daytime coral reef community calcification and photosynthesis during a reef-wide bleaching event. Despite a measured decline in coral health across several taxa, there was no change in overall daytime community calcification and photosynthesis. These findings highlight potential limitations of these community-level metrics to reflect actual changes in coral health.
Hyewon Heather Kim, Jeff S. Bowman, Ya-Wei Luo, Hugh W. Ducklow, Oscar M. Schofield, Deborah K. Steinberg, and Scott C. Doney
Biogeosciences, 19, 117–136, https://doi.org/10.5194/bg-19-117-2022, https://doi.org/10.5194/bg-19-117-2022, 2022
Short summary
Short summary
Heterotrophic marine bacteria are tiny organisms responsible for taking up organic matter in the ocean. Using a modeling approach, this study shows that characteristics (taxonomy and physiology) of bacteria are associated with a subset of ecological processes in the coastal West Antarctic Peninsula region, a system susceptible to global climate change. This study also suggests that bacteria will become more active, in particular large-sized cells, in response to changing climates in the region.
Alice E. Webb, Didier M. de Bakker, Karline Soetaert, Tamara da Costa, Steven M. A. C. van Heuven, Fleur C. van Duyl, Gert-Jan Reichart, and Lennart J. de Nooijer
Biogeosciences, 18, 6501–6516, https://doi.org/10.5194/bg-18-6501-2021, https://doi.org/10.5194/bg-18-6501-2021, 2021
Short summary
Short summary
The biogeochemical behaviour of shallow reef communities is quantified to better understand the impact of habitat degradation and species composition shifts on reef functioning. The reef communities investigated barely support reef functions that are usually ascribed to conventional coral reefs, and the overall biogeochemical behaviour is found to be similar regardless of substrate type. This suggests a decrease in functional diversity which may therefore limit services provided by this reef.
Emmanuel Devred, Andrea Hilborn, and Cornelia Elizabeth den Heyer
Biogeosciences, 18, 6115–6132, https://doi.org/10.5194/bg-18-6115-2021, https://doi.org/10.5194/bg-18-6115-2021, 2021
Short summary
Short summary
A theoretical model of grey seal seasonal abundance on Sable Island (SI) coupled with chlorophyll-a concentration [chl-a] measured by satellite revealed the impact of seal nitrogen fertilization on the surrounding waters of SI, Canada. The increase in seals from about 100 000 in 2003 to about 360 000 in 2018 during the breeding season is consistent with an increase in [chl-a] leeward of SI. The increase in seal abundance explains 8 % of the [chl-a] increase.
Julie Meilland, Michael Siccha, Maike Kaffenberger, Jelle Bijma, and Michal Kucera
Biogeosciences, 18, 5789–5809, https://doi.org/10.5194/bg-18-5789-2021, https://doi.org/10.5194/bg-18-5789-2021, 2021
Short summary
Short summary
Planktonic foraminifera population dynamics has long been assumed to be controlled by synchronous reproduction and ontogenetic vertical migration (OVM). Due to contradictory observations, this concept became controversial. We here test it in the Atlantic ocean for four species of foraminifera representing the main clades. Our observations support the existence of synchronised reproduction and OVM but show that more than half of the population does not follow the canonical trajectory.
Federica Maggioni, Mireille Pujo-Pay, Jérome Aucan, Carlo Cerrano, Barbara Calcinai, Claude Payri, Francesca Benzoni, Yves Letourneur, and Riccardo Rodolfo-Metalpa
Biogeosciences, 18, 5117–5140, https://doi.org/10.5194/bg-18-5117-2021, https://doi.org/10.5194/bg-18-5117-2021, 2021
Short summary
Short summary
Based on current experimental evidence, climate change will affect up to 90 % of coral reefs worldwide. The originality of this study arises from our recent discovery of an exceptional study site where environmental conditions (temperature, pH, and oxygen) are even worse than those forecasted for the future.
While these conditions are generally recognized as unfavorable for marine life, we found a rich and abundant coral reef thriving under such extreme environmental conditions.
Nisan Sariaslan and Martin R. Langer
Biogeosciences, 18, 4073–4090, https://doi.org/10.5194/bg-18-4073-2021, https://doi.org/10.5194/bg-18-4073-2021, 2021
Short summary
Short summary
Analyses of foraminiferal assemblages from the Mamanguape mangrove estuary (northern Brazil) revealed highly diverse, species-rich, and structurally complex biotas. The atypical fauna resembles shallow-water offshore assemblages and are interpreted to be the result of highly saline ocean waters penetrating deep into the estuary. The findings contrast with previous studies, have implications for the fossil record, and provide novel perspectives for reconstructing mangrove environments.
Jutta E. Wollenburg, Jelle Bijma, Charlotte Cremer, Ulf Bickmeyer, and Zora Mila Colomba Zittier
Biogeosciences, 18, 3903–3915, https://doi.org/10.5194/bg-18-3903-2021, https://doi.org/10.5194/bg-18-3903-2021, 2021
Short summary
Short summary
Cultured at in situ high-pressure conditions Cibicides and Cibicidoides taxa develop lasting ectoplasmic structures that cannot be retracted or resorbed. An ectoplasmic envelope surrounds their test and may protect the shell, e.g. versus carbonate aggressive bottom water conditions. Ectoplasmic roots likely anchor the specimens in areas of strong bottom water currents, trees enable them to elevate themselves above ground, and twigs stabilize and guide the retractable pseudopodial network.
Kumar Nimit
Biogeosciences, 18, 3631–3635, https://doi.org/10.5194/bg-18-3631-2021, https://doi.org/10.5194/bg-18-3631-2021, 2021
Short summary
Short summary
The Indian Ocean Rim hosts many of the underdeveloped and emerging economies that depend on ocean resources for the livelihood of millions. Operational ocean information services cater to the requirements of resource managers and end-users to efficiently harness resources, mitigate threats and ensure safety. This paper outlines existing tools and explores the ongoing research that has the potential to convert the findings into operational services in the near- to midterm.
Finn Mielck, Rune Michaelis, H. Christian Hass, Sarah Hertel, Caroline Ganal, and Werner Armonies
Biogeosciences, 18, 3565–3577, https://doi.org/10.5194/bg-18-3565-2021, https://doi.org/10.5194/bg-18-3565-2021, 2021
Short summary
Short summary
Marine sand mining is becoming more and more important to nourish fragile coastlines that face global change. We investigated the largest sand extraction site in the German Bight. The study reveals that after more than 35 years of mining, the excavation pits are still detectable on the seafloor while the sediment composition has largely changed. The organic communities living in and on the seafloor were strongly decimated, and no recovery is observable towards previous conditions.
France Van Wambeke, Elvira Pulido, Philippe Catala, Julie Dinasquet, Kahina Djaoudi, Anja Engel, Marc Garel, Sophie Guasco, Barbara Marie, Sandra Nunige, Vincent Taillandier, Birthe Zäncker, and Christian Tamburini
Biogeosciences, 18, 2301–2323, https://doi.org/10.5194/bg-18-2301-2021, https://doi.org/10.5194/bg-18-2301-2021, 2021
Short summary
Short summary
Michaelis–Menten kinetics were determined for alkaline phosphatase, aminopeptidase and β-glucosidase in the Mediterranean Sea. Although the ectoenzymatic-hydrolysis contribution to heterotrophic prokaryotic needs was high in terms of N, it was low in terms of C. This study points out the biases in interpretation of the relative differences in activities among the three tested enzymes in regard to the choice of added concentrations of fluorogenic substrates.
Oscar E. Romero, Simon Ramondenc, and Gerhard Fischer
Biogeosciences, 18, 1873–1891, https://doi.org/10.5194/bg-18-1873-2021, https://doi.org/10.5194/bg-18-1873-2021, 2021
Short summary
Short summary
Upwelling intensity along NW Africa varies on the interannual to decadal timescale. Understanding its changes is key for the prediction of future changes of CO2 sequestration in the northeastern Atlantic. Based on a multiyear (1988–2009) sediment trap experiment at the site CBmeso, fluxes and the species composition of the diatom assemblage are presented. Our data help in establishing the scientific basis for forecasting and modeling future states of this ecosystem and its decadal changes.
Katharine T. Bigham, Ashley A. Rowden, Daniel Leduc, and David A. Bowden
Biogeosciences, 18, 1893–1908, https://doi.org/10.5194/bg-18-1893-2021, https://doi.org/10.5194/bg-18-1893-2021, 2021
Short summary
Short summary
Turbidity flows – underwater avalanches – are large-scale physical disturbances believed to have profound impacts on productivity and diversity of benthic communities in the deep sea. We reviewed published studies and found that current evidence for changes in productivity is ambiguous at best, but the influence on regional and local diversity is clearer. We suggest study design criteria that may lead to a better understanding of large-scale disturbance effects on deep-sea benthos.
Phillip Williamson, Hans-Otto Pörtner, Steve Widdicombe, and Jean-Pierre Gattuso
Biogeosciences, 18, 1787–1792, https://doi.org/10.5194/bg-18-1787-2021, https://doi.org/10.5194/bg-18-1787-2021, 2021
Short summary
Short summary
The reliability of ocean acidification research was challenged in early 2020 when a high-profile paper failed to corroborate previously observed impacts of high CO2 on the behaviour of coral reef fish. We now know the reason why: the
replicatedstudies differed in many ways. Open-minded and collaborative assessment of all research results, both negative and positive, remains the best way to develop process-based understanding of the impacts of ocean acidification on marine organisms.
Michael Lintner, Bianca Lintner, Wolfgang Wanek, Nina Keul, and Petra Heinz
Biogeosciences, 18, 1395–1406, https://doi.org/10.5194/bg-18-1395-2021, https://doi.org/10.5194/bg-18-1395-2021, 2021
Short summary
Short summary
Foraminifera are unicellular marine organisms that play an important role in the marine element cycle. Changes of environmental parameters such as salinity or temperature have a significant impact on the faunal assemblages. Our experiments show that changes in salinity immediately influence the foraminiferal activity. Also the light regime has a significant impact on carbon or nitrogen processing in foraminifera which contain no kleptoplasts.
Michele Casini, Martin Hansson, Alessandro Orio, and Karin Limburg
Biogeosciences, 18, 1321–1331, https://doi.org/10.5194/bg-18-1321-2021, https://doi.org/10.5194/bg-18-1321-2021, 2021
Short summary
Short summary
In the past 20 years the condition of the eastern Baltic cod has dropped, with large implications for the fishery. Our results show that simultaneously the cod population has moved deeper while low-oxygenated waters detrimental for cod growth have become shallower. Cod have thus dwelled more in detrimental waters, explaining the drop in its condition. This study, using long-term fish and hydrological monitoring data, evidences the impact of deoxygenation on fish biology and fishing.
Elizabeth D. LaBone, Kenneth A. Rose, Dubravko Justic, Haosheng Huang, and Lixia Wang
Biogeosciences, 18, 487–507, https://doi.org/10.5194/bg-18-487-2021, https://doi.org/10.5194/bg-18-487-2021, 2021
Short summary
Short summary
The hypoxic zone is an area of low dissolved oxygen (DO) in the Gulf of Mexico. Fish can be killed by exposure to hypoxia and can be negatively impacted by exposure to low, nonlethal DO concentrations (sublethal DO). We found that high sublethal area resulted in higher exposure and DO variability had a small effect on exposure. There was a large variation in exposure among individuals, which when combined with spatial variability of DO, can result in an underestimation of exposure when averaged.
Svenja Reents, Peter Mueller, Hao Tang, Kai Jensen, and Stefanie Nolte
Biogeosciences, 18, 403–411, https://doi.org/10.5194/bg-18-403-2021, https://doi.org/10.5194/bg-18-403-2021, 2021
Short summary
Short summary
By conducting a flooding experiment with two genotypes of the salt-marsh grass Elymus athericus, we show considerable differences in biomass response to flooding within the same species. As biomass production plays a major role in sedimentation processes and thereby salt-marsh accretion, we emphasise the importance of taking intraspecific differences into account when evaluating ecosystem resilience to accelerated sea level rise.
Cited articles
Ambler, J. W. and Frost, B. W.: The feeding behavior of a predatory
planktonic copepod, Torlanus discaudatus, Limnol. Oceanogr., 19,
446–451, 1974.
Antonio, E. S., Kasai, A., Ueno, M., Kurikawa, Y., Tsuchiya, K., Toyohara,
H., Inshihi, Y., Yokoyama, H., and Yamashita, Y.: Consumption of terrestrial
organic matter by estuarine molluscs determined by analysis of their stable
isotopes and cellulase activity, Estuar. Coast. Shelf S., 86, 401–407, 2010.
Baek, S. H., Kim, D., Son, M., Yun, S. M., and Kim, Y. O.: Seasonal
distribution of phytoplankton assemblages and nutrient-enriched bioassays as
indicators of nutrient limitation of phytoplankton growth in Gwangyang Bay,
Korea, Estuar. Coast. Shelf S., 163, 265–278, 2015.
Berk, S. G., Brownlee, D. C., Heinle, D. R., Kling, H. J., and Colwell, R.
R.: Ciliates as a food source for marine planktonic copepods, Microb. Ecol.,
4, 27–40, 1977.
Calbet, A. and Saiz, E.: The ciliate-copepod link in marine ecosystems,
Aquat. Microb. Ecol., 38, 157–167, 2005.
Checkley, D. M. and Entzeroth, L. C.: Elemental and isotopic fractionation of
carbon and nitrogen by marine, planktonic copepods and implications to the
marine nitrogen cycle, J. Plankton Res., 7, 553–568, 1985.
Checkley, D. M. and Miller, C. A.: Nitrogen isotope fractionation by oceanic
zooplankton, Deep-Sea Res. Pt. I, 36, 1449–1456, 1989.
Chen, M. and Liu, H.: Experimental simulation of trophic interactions among
omnivorous copepods, heterotrophic dinoflagellates and diatoms, J. Exp. Mar.
Biol. Ecol., 403, 65–74, 2011.
Chen, M., Liu, H., and Li, H.: Effect of mesozooplankton feeding selectivity
on the dynamics of algae in the presence of intermediate grazers a laboratory
simulation, Mar. Ecol.-Prog. Ser., 486, 47–58, 2013.
Chen, M., Liu, H., and Chen, B.: Seasonal variability of mesozooplankton
feeding rates on phytoplankton in subtropical coastal and estuarine waters,
Front. Mar. Sci., 4, 186, https://doi.org/10.3389/fmars.2017.00186, 2017.
Choy, E. J., An, S., and Kang, C. K.: Pathways of organic matter through food
webs of diverse habitats in the regulated Nakdong River estuary (Korea),
Estuar. Coast. Shelf S., 78, 215–226, 2008.
Cifuentes, L. A., Sharp, J. H., and Fogel, M. L.: Stable carbon and nitrogen
isotope biogeochemistry in the Delaware estuary, Limnol. Oceanogr., 33,
1102–1115, 1988.
Conley, W. J. and Turner, J. T.: Omnivory by the coastal marine copepods
Centropages hamatus and Labidocera aestiva, Mar.
Ecol.-Prog. Ser., 241, 113–120, 1985.
Deegan, L. A. and Garritt, R. H.: Evidence for spatial variability in
estuarine food webs, Mar. Ecol.-Prog. Ser., 147, 31–47, 1997.
Fessenden, L. and Cowles, T. J.: Copepod predation on phagotrophic ciliates
in Oregon coastal waters, Mar. Ecol.-Prog. Ser., 107, 103–111, 1994.
Fogel, M. L. and Cifuentes, L. A.: Isotope fractionation during primary
production, in: Organic Geochemistry, edited by: Engel, M. H. and Macko, S.
A., Plenum Press, New York, 73–98, 1993.
Francis, T. B., Schindler, D. E., Holtgrieve, G. W., Larson, E. R.,
Scheuerell, M. D., Semmens, B. X., and Ward, E. J.: Habitat structure
determines resource use by zooplankton in temperate lakes, Ecol. Lett., 14,
364–372, 2011.
Froneman, P. W.: In situ feeding rates of the copepods,
Pseudodiaptomus hessei and Acartia longipatella, in a
temperate, temporarily open/closed Eastern Cape estuary, S. Afr. J. Sci.,
100, 577–583, 2004.
Fry, B.: Conservative mixing of stable isotopes across estuarine salinity
gradients: a conceptual framework for monitoring watershed influences on
downstream fisheries production, Estuar. Coast., 25, 264–271, 2002.
Fry, B.: Stable Isotope Ecology, Springer Science & Business Media, New
York, USA, 2007.
Gearing, J. N., Gearing, P. J., Rudnick, D. T., Requejo, A. G., and Hutchins,
M. J.: Isotopic variability of organic carbon in a phytoplankton-based,
temperate estuary, Geochim. Cosmochim. Ac., 48, 1089–1098, 1984.
Gifford, S. M., Rollwagen-Bollens, G., and Bollens, S. M.: Mesozooplankton
omnivory in the upper San Francisco Estuary, Mar. Ecol.-Prog. Ser., 348,
33–46, 2007.
Gophen, M. and Harris, R. P.: Visual predation by a marine cyclopoid copepod,
Corycaeus anglicus, J. Mar. Biol. Assoc. UK, 61, 391–399, 1981.
Graeve, M., Hagen, W., and Kattner, G.: Herbivorous or omnivorous? On the
significance of lipid compositions as trophic markers in Antarctic copepods,
Deep-Sea Res. Pt. I, 41, 915–924, 1994.
Granger, J., Sigman, D. M., Needoba, J. A., and Harrison, P. J.: Coupled
nitrogen and oxygen isotope fractionation of nitrate during assimilation by
cultures of marine phytoplankton, Limnol. Oceanogr., 49, 1763–1773, 2004.
Grey, J., Jones, R. I., and Sleep, D.: Seasonal changes in the importance of
the source of organic matter to the diet of zooplankton in Loch Ness, as
indicated by stable isotope analysis, Limnol. Oceanogr., 46, 505–513, 2001.
Hada, A. and Uye, S.: Cannibalistic feeding behavior of the brackish-water
copepod Sinocalanus tenellus, J. Plankton. Res., 13, 155–166, 1991.
Hannides, C., Popp, B. N., Landry, M. R., and Graham, B. S.: Quantification
of zooplankton trophic position in the North Pacific Subtropical Gyre using
stable nitrogen isotopes, Limnol. Oceanogr., 54, 50–61, 2009.
Hemminga, M. A. and Mateo, M. A.: Stable carbon isotopes in seagrasses:
variability in ratios and use in ecological studies, Mar. Ecol.-Prog. Ser.,
140, 285–298, 1996.
Herzka, S. Z.: Assessing connectivity of estuarine fishes based on stable
isotope ratio analysis, Estuar. Coast. Shelf S., 64, 58–69, 2005.
Hooff, R. C. and Bollens, S. M.: Functional response and potential predatory
impact of Tortanus dextrilobatus, a carnivorous copepod recently
introduced to the San Francisco Estuary, Mar. Ecol.-Prog. Ser., 277,
167–179, 2004.
Jang, M.-C., Shin, K., Lee, T., and Noh, I.: Feeding selectivity of calanoid
copepods on phytoplankton in Jangmok Bay, South Coast of Korea, Ocean Sci.
J., 45, 101–111, 2010.
Jeffrey, S. W.: Application of pigment methods to oceanography, in:
Phytoplankton Pigments in Oceanography: Guidelines to Modern Methods, edited
by: Jeffery, S. W., Mantoura, R. F. C., and Wright, S. W., UNESCO Publishing,
Paris, France, 127–166, 1997.
Kang, C. K., Kim, J. B., Lee, K. S., Kim, J. B., Lee, P. Y., and Hong, J. S.:
Trophic importance of benthic microalgae to macrozoobenthos in coastal bay
systems in Korea: dual stable C and N isotope analyses, Mar. Ecol.-Prog.
Ser., 259, 79–92, 2003.
Kang, C. K., Choy, E. J., Hur, Y. B., and Myeong, J. I.: Isotopic evidence of
particle size-dependent food partitioning in cocultured sea squirt
Halocynthia roretzi and Pacific oyster Crassostrea gigas,
Aquat. Biol., 6, 289–302, 2009.
Kim, B. J., Ro, Y. J., Jung, K. Y., and Park, K. S.: Numerical modeling of
circulation characteristics in the Kwangyang Bay estuarine system, J. Korean
Soc. Coast. Ocean Eng., 26, 253–266, 2014.
Kim, S. Y., Moon, C. H., Cho, H. J., and Lim, D. I.: Dinoflagellate cysts in
coastal sediments as indicators of eutrophication: a case of Gwangyang Bay,
South Sea of Korea, Estuar. Coast., 32, 1225–233, 2009.
Kiørboe, T., Saiz, E., and Viitasalo, M.: Prey switching behaviour in the
planktonic copepod Acartia tonsa, Mar. Ecol.-Prog. Ser., 143,
65–75, 1996.
Kürten, B., Painting, S. J., Struck, U., Polunin, N. V., and Middelburg,
J. J.: Tracking seasonal changes in North Sea zooplankton trophic dynamics
using stable isotopes, Biogeochemistry, 113, 1–21, 2013.
Kwak, J. H., Han, E., Lee, S. H., Park, H. J., Kim, K. R., and Kang, C. K.: A
consistent structure of phytoplankton communities across the warm–cold
regions of the water mass on a meridional transect in the East/Japan Sea,
Deep-Sea Res. Pt. II, 143, 36–44, 2017.
Kwon, K. Y., Moon, C. H., Kang, C. K., and Kim, Y. N.: Distribution of
particulate organic matters along the salinity gradients in the Seomjin River
estuary, Korean J. Fish. Aquat. Sci., 35, 86–96, 2002.
Kwon, K. Y., Moon, C. H., Lee, J. S., Yang, S. R., Park, M. O., and Lee, P.
Y.: Estuarine behavior and flux of nutrients in the Seomjin River estuary,
The Sea J. Korean Soc. Oceanogr., 9, 153–163, 2004.
Landry, M. R.: Predatory feeding behavior of a marine copepod,
Labidocera trispinosa, Limnol. Oceanogr., 23, 1103–1113, 1978.
Landry, M. R., Lehner-Fournier, J. M., and Fagerness, V. L.: Predatory
feeding behavior of the marine cyclopoid copepod Corycaeus anglicus,
Mar. Biol., 85, 163–169, 1985.
Layman, C. A., Araujo, M. S., Boucek, R., Hammerschlag-Peyer, C. M.,
Harrison, E., Jud, Z. R., and Post, D. M.: Applying stable isotopes to
examine food-web structure: an overview of analytical tools, Biol. Rev., 87,
545–562, 2012.
Lee, S. Y.: Carbon dynamics of Deep Bay, eastern Pearl River estuary, China.
II: Trophic relationship based on carbon-and nitrogen-stable isotopes, Mar.
Ecol.-Prog. Ser., 205, 1–10, 2000.
Lee, Y. W., Park, M. O., Kim, Y. S., Kim, S. S., and Kang, C. K.: Application
of photosynthetic pigment analysis using a HPLC and CHEMTAX program to
studies of/ phytoplankton community composition, The Sea J. Korean Soc.
Oceanogr., 16, 117–124, 2011.
Liu, G. M., Sun, J., Wang, H., Zhang, Y., Yang, B., and Ji, B.: Abundance of
Calanus sinicus across the tidal front in the Yellow Sea, China,
Fish. Oceanogr., 12, 291–298, 2003.
Liu, H., Dagg, M. J., and Strom, S.: Grazing by the calanoid copepod
Neocalanus cristatus on the microbial food web in the coastal Gulf
of Alaska, J. Plankton Res., 27, 647–662, 2005a.
Liu, H., Dagg, M., Wu, C., and Chiang, K.: Mesozooplankton consumption of
microplankton in the Mississippi River plume, with special emphasis on
planktonic ciliates, Mar. Ecol.-Prog. Ser., 286, 133–144, 2005b.
Matson, E. A. and Brinson, M. M.: Stable carbon isotopes and the C : N
ratio in the estuaries of the Pamlico and Neuse Rivers. North Carolina,
Limnol. Oceanogr., 35, 1290–1300, 1990.
McClelland, J. W., Valiela, I., Michener, R. H.: Nitrogen-stable isotope
signatures in estuarine food webs: A record of increasing urbanization in
coastal watersheds, Limnol. Oceanogr., 42, 930–937, 1997.
Melville, A. J. and Connolly, R. M.: Spatial analysis of stable isotope data
to determine primary sources of nutrition for fish, Oecologia, 136, 499–507,
2003.
Michener, R. H. and Kaufman, L.: Stable isotope ratios as tracers in marine
food webs: an update, Stable Isotopes in Ecology and Environmental Science,
2, 238–282, 2007.
Montoya, J. P., Horrigan, S. G., and McCarthy, J. J.: Rapid, storm-induced
changes in the natural abundance of 15N in a planktonic ecosystem,
Chesapeake Bay, USA, Geochim. Cosmochim. Ac., 55, 3627–3638, 1991.
Montoya, J. P., Carpenter, E. J., and Capone, D. G.: Nitrogen fixation and
nitrogen isotope abundances in zooplankton of the oligotrophic North
Atlantic, Limnol. Oceanogr., 47, 1617–1628, 2002.
Moore, J. W. and Semmens, B. X.: Incorporating uncertainty and prior
information into stable isotope mixing models, Ecol. Lett., 11, 470–480,
2008.
Mullin, M. M.: Differential predation by the carnivorous marine copepod
Tortanus discautus, Limnol. Oceanogr., 24, 774–777, 1979.
Needoba, J. A., Waser, N. A., Harrison, P. J., and Calvert, S. E.: Nitrogen
isotope fractionation in 12 species of marine phytoplankton during growth on
nitrate, Mar. Ecol.-Prog. Ser., 255, 81–91, 2003.
Nejstgaard, J. C., Naustvoll, L. J., and Sazhin, A.: Correcting for
underestimation of microzooplankton grazing in bottle incubation experiments
with mesozooplankton, Mar. Ecol.-Prog. Ser., 221, 59–75, 2001.
Park, E. O., Suh, H. L., and Soh, H. Y.: Spatio-temporal distribution of
Acartia (Copepoda: Calanoida) species along a salinity gradient in
the Seomjin River estuary, South Korea, J. Nat. Hist., 49, 2799–2812, 2015.
Park, H. J., Han, E., Lee, Y. J., and Kang, C. K.: Trophic linkage of a
temperate intertidal macrobenthic food web under opportunistic macroalgal
blooms: A stable isotope approach, Mar. Pollut. Bull., 111, 86–94, 2016.
Parnell, A. C., Inger, R., Bearhop, S., and Jackson, A. L.: Source
partitioning using stable isotopes: coping with too much variation, PloS One,
5, e9672, https://doi.org/10.1371/journal.pone.0009672, 2010.
Parnell, A. C., Phillips, D. L., Bearhop, S., Semmens, B. X., Ward, E. J.,
Moore, J. W., Jackson, A. L., Grey, J., Kelly, D. J., and Inger, R.: Bayesian
stable isotope mixing models, Environmetrics, 24, 387–399, 2013.
Phillips, D. L. and Gregg, J. W.: Source partitioning using stable isotopes:
coping with too many sources, Oecologia, 136, 261–269, 2003.
Phillips, D. L. and Koch, P. L.: Incorporating concentration dependence in
stable isotope mixing models, Oecologia, 130, 114–125, 2002.
Post, D. M.: Using stable isotopes to estimate trophic position: models,
methods, and assumptions, Ecology, 83, 703–718, 2002.
Rau, G. H., Teyssie, J. L., Rassoulzadegan, F., and Fowler, S. W.:
13C/12C and 15N/14N variations among size-fractionated
marine particles: implications for their origin and trophic relationships,
Mar. Ecol.-Prog. Ser., 59, 33–38, 1990.
Rolff, C.: Seasonal variation in δ13C and δ15N of
size-fractionated plankton at a coastal station in the northern Baltic
proper, Mar. Ecol.-Prog. Ser., 203, 47–65, 2000.
Rollwagen-Bollens, G. C. and Penry, D. L.: Feeding dynamics of
Acartia spp. copepods in a large, temperate estuary (San Francisco
Bay, CA), Mar. Ecol.-Prog. Ser., 257, 139–158, 2003.
Sato, T., Miyajima, T., Ogawa, H., Umezawa, Y., and Koike, I.: Temporal
variability of stable carbon and nitrogen isotopic composition of
size-fractionated particulate organic matter in the hypertrophic Sumida River
Estuary of Tokyo Bay, Japan, Estuar. Coast. Shelf S., 68, 245–258, 2006.
Sautour, B. and Castel, J.: Feeding behaviour of the coastal copepod
Euterpina acutifrons on small particles, Cah. Biol. Mar., 34,
239–251, 1993.
Schmidt, K., Atkinson, A., Stübing, D., McClelland, J. W., Montoya, J.
P., and Voss, M.: Trophic relationships among Southern Ocean copepods and
krill: some uses and limitations of a stable isotope approach, Limnol.
Oceanogr., 48, 277–289, 2003.
Sell, A. F., van Keuren, D., and Madin, L. P.: Predation by omnivorous
copepods on early developmental stages of Calanus finmarchicus and
Pseudocalanus spp., Limnol. Oceanogr., 46, 953–959, 2001.
Sommer, F., Saage, A., Santer, B., Hansen, T., and Sommer, U.: Linking
foraging strategies of marine calanoid copepods to patterns of nitrogen
stable isotope signatures in a mesocosm study. Mar. Ecol.-Prog. Ser., 286,
99–106, 2005.
Sommer, U. and Sommer, F.: Cladocerans versus copepods: the cause of
contrasting top–down controls on freshwater and marine phytoplankton,
Oecologia, 147, 183–194, 2006.
Stibor, H., Vadstein, O., Diehl, S., Gelzleichter, A., Hansen, T., Hantzsche,
F., Katechakis, A., Lippert, B., Løseth, K., Peters, C., Roederer, W.,
Sandow, M., Sundt-Hansen, L., and Olsen, Y.: Copepods act as a switch between
alternative trophic cascades in marine pelagic food webs, Ecol. Lett., 7,
321–328, 2004.
Tamelander, T., Søreide, J. E., Hop, H., and Carroll, M. L.: Fractionation
of stable isotopes in the Arctic marine copepod Calanus glacialis:
effects on the isotopic composition of marine particulate organic matter, J.
Exp. Mar. Biol. Ecol., 333, 231–240, 2006.
Thornton, S. F. and McManus, J.: Application of organic carbon and nitrogen
stable isotope and C ∕ N ratios as source indicators of organic matter
provenance in estuarine systems: evidence from the Tay Estuary, Scotland,
Estuar. Coast. Shelf S., 38, 219–233, 1994.
Turner, J. T.: Zooplankton feeding ecology: contents of fecal pellets of the
copepods Acartia tonsa and Labidocera aestiva from
continental shelf waters near the mouth of the Mississippi River, Mar. Ecol.,
5, 265–282, 1984.
Turner, J. T.: Zooplankton feeding ecology: contents of fecal pellets of the
cyclopoid copepods Oncaea venusta, Corycaeus amazonicus,
Oithona plumifera, and O. simplex from the northern Gulf of
Mexico, Mar. Ecol., 7, 289–302, 1986.
Turner, J. T.: The importance of small planktonic copepods and their roles in
pelagic marine food webs, Zool. Stud., 43, 255–266, 2004.
Uye, S.: Why does Calanus sinicus prosper in the shelf ecosystem of
the Northwest Pacific Ocean?, ICES J. Mar. Sci, 57, 1850–1855, 2000.
Uye, S. and Kayano, Y.: Predatory feeding behavior of Tortanus (Copepoda:
Calanoida): life-stage differences and the predation impact on small
planktonic crustaceans, J. Crustacean Biol., 14, 473–483, 1994.
Vadstein, O., Stibor, H., Lippert, B., Løseth, K., Roederer, W.,
Sundt-Hansen, L., and Olsen, Y.: Moderate increase in the biomass of
omnivorous copepods may ease grazing control of planktonic algae, Mar.
Ecol.-Prog. Ser., 270, 199–207, 2004.
Ward, E. J., Semmens, B. X., and Schindler, D. E.: Including source
uncertainty and prior information in the analysis of stable isotope mixing
models, Environ. Sci. Technol., 44, 4645–4650, 2010.
Waser, N. A. D., Harrison, P. J., Nielsen, B., Calvert, S. E., and Turpin, D.
H.: Nitrogen isotope fractionation during the uptake and assimilation of
nitrate, nitrite, ammonium, and urea by a marine diatom, Limnol. Oceanogr.,
43, 215–224, 1998.
Wiadnyana, N. N. and Rassoulzadegan, F.: Selective feeding of Acartia clause and Centropages typicus on microzooplankton, Mar.
Ecol.-Prog. Ser., 53, 37–45, 1989.
Wood, S. and Wood, M. S.: Package “mgcv”, R Package Version 1.7–29, 2015.
Zapata, M., Rodríguez, F., and Garrido, J. L.: Separation of
chlorophylls and carotenoids from marine phytoplankton: a new HPLC method
using a reversed phase C8 column and pyridine-containing mobile phases, Mar.
Ecol.-Prog. Ser., 195, 29–45, 2000.
Zöllner, E., Hoppe, H. G., Sommer, U., and Jürgens, K.: Effect of
zooplankton-mediated trophic cascades on marine microbial food web components
(bacteria, nanoflagellates, ciliates), Limnol. Oceanogr., 54, 262–275, 2009.
Short summary
The trophic preference (i.e., food resources and trophic levels) of different copepod groups was assessed along a salinity gradient in the temperate estuarine Gwangyang Bay of Korea, based on a seasonal investigation of taxonomic results in 2015 and stable isotope analysis incorporating multiple linear regression models. Our results depict a simple energy flow of the planktonic food web of Gwangyang Bay.
The trophic preference (i.e., food resources and trophic levels) of different copepod groups was...
Altmetrics
Final-revised paper
Preprint