Articles | Volume 15, issue 6
https://doi.org/10.5194/bg-15-1843-2018
© 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-15-1843-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
29 Mar 2018
Research article |
| 29 Mar 2018
| 29 Mar 2018
Coccolithophore populations and their contribution to carbonate export during an annual cycle in the Australian sector of the Antarctic zone
Andrés S. Rigual Hernández
CORRESPONDING AUTHOR
Área de Paleontología, Departamento de Geología, Universidad
de Salamanca, 37008 Salamanca, Spain
José A. Flores
Área de Paleontología, Departamento de Geología, Universidad
de Salamanca, 37008 Salamanca, Spain
Francisco J. Sierro
Área de Paleontología, Departamento de Geología, Universidad
de Salamanca, 37008 Salamanca, Spain
Miguel A. Fuertes
Área de Paleontología, Departamento de Geología, Universidad
de Salamanca, 37008 Salamanca, Spain
Lluïsa Cros
Institut de Ciències del Mar, CSIC, Passeig Marítim 37-49, 08003
Barcelona, Spain
Thomas W. Trull
Antarctic Climate and Ecosystems Cooperative Research Centre, University
of Tasmania, Hobart, Tasmania 7001, Australia
CSIRO Oceans and Atmosphere Flagship, Hobart, Tasmania 7001, Australia
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Paula Conde Pardo, Bronte Tilbrook, Clothilde Langlais, Thomas William Trull, and Stephen Rich Rintoul
Biogeosciences, 14, 5217–5237, https://doi.org/10.5194/bg-14-5217-2017, https://doi.org/10.5194/bg-14-5217-2017, 2017
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O. Rama-Corredor, B. Martrat, J. O. Grimalt, G. E. López-Otalvaro, J. A. Flores, and F. Sierro
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Biogeosciences, 12, 5309–5337, https://doi.org/10.5194/bg-12-5309-2015, https://doi.org/10.5194/bg-12-5309-2015, 2015
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F. Planchon, D. Ballas, A.-J. Cavagna, A. R. Bowie, D. Davies, T. Trull, E. C. Laurenceau-Cornec, P. Van Der Merwe, and F. Dehairs
Biogeosciences, 12, 3831–3848, https://doi.org/10.5194/bg-12-3831-2015, https://doi.org/10.5194/bg-12-3831-2015, 2015
M. Grenier, A. Della Penna, and T. W. Trull
Biogeosciences, 12, 2707–2735, https://doi.org/10.5194/bg-12-2707-2015, https://doi.org/10.5194/bg-12-2707-2015, 2015
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Four bio-profilers were deployed in the high-biomass plume downstream of the Kerguelen Plateau (KP; Southern Ocean) to examine the conditions favouring phytoplankton accumulation. Regions of very high Chla accumulation were mainly associated with surface waters from the northern KP. Light limitation seems to have a limited influence on production. A cyclonic eddy was associated with a significant export of organic matter and a subsequent dissolved inorganic carbon storage in the ocean interior.
I. Hernández-Almeida, F.-J. Sierro, I. Cacho, and J.-A. Flores
Clim. Past, 11, 687–696, https://doi.org/10.5194/cp-11-687-2015, https://doi.org/10.5194/cp-11-687-2015, 2015
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This manuscript presents new Mg/Ca and previously published δ18O measurements of Neogloboquadrina pachyderma sinistral for MIS 31-19, from a sediment core from the subpolar North Atlantic. The mechanism proposed here involves northward subsurface transport of warm and salty subtropical waters during periods of weaker AMOC, leading to ice-sheet instability and IRD discharge. This is the first time that these rapid climate oscillations are described for the early Pleistocene.
M. Fourquez, I. Obernosterer, D. M. Davies, T. W. Trull, and S. Blain
Biogeosciences, 12, 1893–1906, https://doi.org/10.5194/bg-12-1893-2015, https://doi.org/10.5194/bg-12-1893-2015, 2015
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In this manuscript, we present the results of iron uptake measured in the naturally iron-fertilized area during the Kerguelen Ocean and Plateau compared Study 2 cruise (KEOPS2). Iron uptake by bulk community and several size fractions (microplankton, pico-nanoplankton and bacteria) are presented, compared and discussed in the present paper. This work also presents first investigations on the potential competition between bacteria and phytoplankton for access to iron.
T. W. Trull, D. M. Davies, F. Dehairs, A.-J. Cavagna, M. Lasbleiz, E. C. Laurenceau-Cornec, F. d'Ovidio, F. Planchon, K. Leblanc, B. Quéguiner, and S. Blain
Biogeosciences, 12, 1029–1056, https://doi.org/10.5194/bg-12-1029-2015, https://doi.org/10.5194/bg-12-1029-2015, 2015
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The KEOPS2 oceanographic study surveyed more than 30 sites downstream from the Kerguelen Islands in the Southern Ocean to examine the degree of variation in phytoplankton community responses to natural iron inputs. Our observations of community structure based on the chemical compositions of six microbial size fractions suggest that early spring trophodynamic and export responses differed between regions with persistently low levels versus punctually high levels of iron fertilisation.
E. C. Laurenceau-Cornec, T. W. Trull, D. M. Davies, S. G. Bray, J. Doran, F. Planchon, F. Carlotti, M.-P. Jouandet, A.-J. Cavagna, A. M. Waite, and S. Blain
Biogeosciences, 12, 1007–1027, https://doi.org/10.5194/bg-12-1007-2015, https://doi.org/10.5194/bg-12-1007-2015, 2015
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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
Anaïs Lebrun, Cale A. Miller, Marc Meynadier, Steeve Comeau, Pierre Urrutti, Samir Alliouane, Robert Schlegel, Jean-Pierre Gattuso, and Frédéric Gazeau
Biogeosciences, 21, 4605–4620, https://doi.org/10.5194/bg-21-4605-2024, https://doi.org/10.5194/bg-21-4605-2024, 2024
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We tested the effects of warming, low salinity, and low irradiance on Arctic kelps. We show that growth rates were similar across species and treatments. Alaria esculenta is adapted to low-light conditions. Saccharina latissima exhibited nitrogen limitation, suggesting coastal erosion and permafrost thawing could be beneficial. Laminaria digitata did not respond to the treatments. Gene expression of Hedophyllum nigripes and S. latissima indicated acclimation to the experimental treatments.
Silvan Urs Goldenberg, Ulf Riebesell, Daniel Brüggemann, Gregor Börner, Michael Sswat, Arild Folkvord, Maria Couret, Synne Spjelkavik, Nicolás Sánchez, Cornelia Jaspers, and Marta Moyano
Biogeosciences, 21, 4521–4532, https://doi.org/10.5194/bg-21-4521-2024, https://doi.org/10.5194/bg-21-4521-2024, 2024
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Ocean alkalinity enhancement (OAE) is being evaluated as a carbon dioxide removal technology for climate change mitigation. With an experiment on species communities, we show that larval and juvenile fish can be resilient to the resulting perturbation of seawater. Fish may hence recruit successfully and continue to support fisheries' production in regions of OAE. Our findings help to establish an environmentally safe operating space for this ocean-based solution.
Thibauld M. Béjard, Andrés S. Rigual-Hernández, Javier P. Tarruella, José-Abel Flores, Anna Sanchez-Vidal, Irene Llamas-Cano, and Francisco J. Sierro
Biogeosciences, 21, 4051–4076, https://doi.org/10.5194/bg-21-4051-2024, https://doi.org/10.5194/bg-21-4051-2024, 2024
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The Mediterranean Sea is regarded as a climate change hotspot. Documenting the population of planktonic foraminifera is crucial. In the Sicily Channel, 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.
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
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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
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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
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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.
Isabell Hochfeld and Jana Hinners
EGUsphere, https://doi.org/10.5194/egusphere-2024-1246, https://doi.org/10.5194/egusphere-2024-1246, 2024
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Ecosystem models disagree on future changes in marine ecosystem functioning. We suspect that the lack of phytoplankton adaptation represents a major uncertainty factor, given the key role that phytoplankton play in marine ecosystems. Using an evolutionary ecosystem model, we found that phytoplankton adaptation can notably change simulated ecosystem dynamics. Future models should include phytoplankton adaptation, otherwise they can systematically overestimate future ecosystem-level changes.
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
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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
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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
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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
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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.
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
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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.
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
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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.
Evert de Froe, Igor Yashayaev, Christian Mohn, Johanne Vad, Furu Mienis, Gerard Duineveld, Ellen Kenchington, Erica Head, Steve Ross, Sabena Blackbird, George Wolff, Murray Roberts, Barry MacDonald, Graham Tulloch, and Dick van Oevelen
EGUsphere, https://doi.org/10.31223/X58968, https://doi.org/10.31223/X58968, 2024
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Deep-sea sponge grounds are distributed globally and are considered hotspots of biological diversity and biogeochemical cycling. To date, little is known about the environmental constraints that control where deep-sea sponge grounds occur and what conditions favor high sponge biomass. Here, we characterize oceanographic conditions at two contrasting sponge grounds. Our results imply that sponges and associated fauna benefit from strong tidal currents and favorable regional ocean currents.
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
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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
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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
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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
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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.
Hyunjae Chung, Jikang Park, Mijin Park, Yejin Kim, Unyoung Chun, Sukyoung Yun, Won Sang Lee, Seung-Tae Yoon, and Won Young Lee
EGUsphere, https://doi.org/10.5194/egusphere-2023-2757, https://doi.org/10.5194/egusphere-2023-2757, 2024
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Understanding how marine animals adapt to spatial and temporal shifts in oceanographic conditions is of utmost importance. In this paper, we investigated the influence of changes in seawater properties on the seasonal behavior of Weddell seals in the Ross Sea, Antarctica. Our findings could serve as a baseline and establish a foundational understanding for future research, particularly concerning the impact of marine environmental changes on the ecosystem of the Ross Sea Marine Protected Area.
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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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.
Cited articles
Acker, J. G. and Leptoukh, G.: Online Analysis Enhances Use of NASA Earth
Science Data, EOS T. Am. Geophys. Un., 88, 14–17, 2007.
Anderson, R. F., Ali, S., Bradtmiller, L. I., Nielsen, S. H. H., Fleisher, M.
Q., Anderson, B. E., and Burckle, L. H.: Wind-Driven Upwelling in the
Southern Ocean and the Deglacial Rise in Atmospheric CO2, Science, 323,
1443–1448, https://doi.org/10.1126/science.1167441, 2009.
Andersson, A. J. and Gledhill, D.: Ocean acidification and coral reefs:
effects on breakdown, dissolution, and net ecosystem calcification, Annu.
Rev. Mar. Sci., 5, 321–348, 2013.
Antonov, J. I., Locarnini, R. A., Boyer, T. P., Mishonov, A. V., and Garcia,
H. E.: World Ocean Atlas 2005, Volume 2: Salinity. S. Levitus, Ed. NOAA Atlas
NESDIS 62, U.S. Government Printing Office, Washington, D.C., 182 pp., 2006.
Archer, D. and Maier-Reimer, E.: Effect of deep-sea sedimentary calcite
preservation on atmospheric CO2 concentration, Nature, 367, 260–263,
1994.
Armstrong, R. A., Lee, C., Hedges, J. I., Honjo, S., and Wakeham, S. G.: A
new, mechanistic model for organic carbon fluxes in the ocean based on the
quantitative association of POC with ballast minerals, Deep-Sea Res. Pt. II,
49, 219–236, https://doi.org/10.1016/S0967-0645(01)00101-1, 2002.
Arrigo, K. R., Robinson, D. H., Worthen, D. L., Dunbar, R. B., DiTullio, G.
R., VanWoert, M., and Lizotte, M. P.: Phytoplankton Community Structure and
the Drawdown of Nutrients and CO2 in the Southern Ocean, Science, 283,
365–367, https://doi.org/10.1126/science.283.5400.365, 1999.
Arrigo, K. R., DiTullio, G. R., Dunbar, R. B., Robinson, D. H., VanWoert, M.,
Worthen, D. L., and Lizotte, M. P.: Phytoplankton taxonomic variability in
nutrient utilization and primary production in the Ross Sea, J. Geophys.
Res.-Oceans, 105, 8827–8846, https://doi.org/10.1029/1998JC000289, 2000.
Bach, L. T., Riebesell, U., Gutowska, M. A., Federwisch, L., and Schulz, K.
G.: A unifying concept of coccolithophore sensitivity to changing carbonate
chemistry embedded in an ecological framework, Prog. Oceanogr., 135,
125–138, https://doi.org/10.1016/j.pocean.2015.04.012, 2015.
Balch, W. M.: Re-evaluation of the physiological ecology of coccolithophores,
in: Coccolithophores. From Molecular Processes to Global Impact, edited by:
Thierstein, H. R. and Young, J. R., Springer-Verlag, Berlin, 165–190, 2004.
Balch, W. M., Drapeau, D. T., Bowler, B. C., Lyczskowski, E., Booth, E. S.,
and Alley, D.: The contribution of coccolithophores to the optical and
inorganic carbon budgets during the Southern Ocean Gas Exchange Experiment:
New evidence in support of the “Great Calcite Belt” hypothesis, J. Geophys.
Res.-Oceans, 116, C00F06, https://doi.org/10.1029/2011JC006941, 2011.
Balch, W. M., Bates, N. R., Lam, P. J., Twining, B. S., Rosengard, S. Z.,
Bowler, B. C., Drapeau, D. T., Garley, R., Lubelczyk, L. C., Mitchell, C.,
and Rauschenberg, S.: Factors regulating the Great Calcite Belt in the
Southern Ocean and its biogeochemical significance, Global Biogeochem. Cy.,
30, 1124–1144, https://doi.org/10.1002/2016GB005414, 2016.
Barber, R. T. and Hiscock, M. R.: A rising tide lifts all phytoplankton:
Growth response of other phytoplankton taxa in diatom-dominated blooms,
Global Biogeochem. Cy., 20, GB4S03, https://doi.org/10.1029/2006GB002726, 2006.
Barnett, T. P., Pierce, D. W., AchutaRao, K. M., Gleckler, P. J., Santer, B.
D., Gregory, J. M., and Washington, W. M.: Penetration of Human-Induced
Warming into the World's Oceans, Science, 309, 284–287,
https://doi.org/10.1126/science.1112418, 2005.
Beaufort, L.: Weight estimates of coccoliths using the optical properties
(birefringence) of calcite, Micropaleontology, 51, 289–297,
https://doi.org/10.2113/gsmicropal.51.4.289, 2005.
Beaufort, L., Couapel, M., Buchet, N., Claustre, H., and Goyet, C.: Calcite
production by coccolithophores in the south east Pacific Ocean,
Biogeosciences, 5, 1101–1117, https://doi.org/10.5194/bg-5-1101-2008, 2008.
Beaufort, L., Probert, I., de Garidel-Thoron, T., Bendif, E. M., Ruiz-Pino,
D., Metzl, N., Goyet, C., Buchet, N., Coupel, P., Grelaud, M., Rost, B.,
Rickaby, R. E. M., and de Vargas, C.: Sensitivity of coccolithophores to
carbonate chemistry and ocean acidification, Nature, 476, 80–83, 2011.
Bollmann, J. and Herrle, J. O.: Morphological variation of Emiliania huxleyi
and sea surface salinity, Earth Planet. Sc. Lett., 255, 273–288,
https://doi.org/10.1016/j.epsl.2006.12.029, 2007.
Bopp, L., Monfray, P., Aumont, O., Dufresne, J.-L., Le Treut, H., Madec, G.,
Terray, L., and Orr, J. C.: Potential impact of climate change on marine
export production, Global Biogeochem. Cy., 15, 81–99,
https://doi.org/10.1029/1999GB001256, 2001.
Bostock, H. C., Hayward, B. W., Neil, H. L., Currie, K. I., and Dunbar, G.
B.: Deep-water carbonate concentrations in the southwest Pacific, Deep-Sea
Res. Pt. I, 58, 72–85, https://doi.org/10.1016/j.dsr.2010.11.010, 2011.
Boyd, P. and Newton, P.: Evidence of the potential influence of planktonic
community structure on the interannual variability of particulate organic
carbon flux, Deep-Sea Res. Pt. I, 42, 619–639,
https://doi.org/10.1016/0967-0637(95)00017-Z, 1995.
Boyd, P. W. and Trull, T. W.: Understanding the export of biogenic particles
in oceanic waters: Is there consensus?, Prog. Oceanogr., 72, 276–312,
https://doi.org/10.1016/j.pocean.2006.10.007, 2007.
Boyd, P. W., LaRoche, J., Gall, M. P., Frew, R., and McKay, R. M. L.: Role of
iron, light, and silicate in controlling algal biomass in subantarctic waters
SE of New Zealand, J. Geophys. Res.-Oceans, 104, 13395–13408,
https://doi.org/10.1029/1999JC900009, 1999.
Boyd, P., Watson, A., Law, C., Abraham, E., Trull, T., Murdoch, R., Bakker,
D., Bowie, A., Buesseler, K., and Chang, H.: Phytoplankton bloom upon
mesoscale iron fertilisation of polar Southern Ocean waters, Nature, 407,
695–702, 2000a.
Boyd, P. W., Watson, A. J., Law, C. S., Abraham, E. R., Trull, T., Murdoch,
R., Bakker, D. C. E., Bowie, A. R., Buesseler, K. O., Chang, H., Charette,
M., Croot, P., Downing, K., Frew, R., Gall, M., Hadfield, M., Hall, J.,
Harvey, M., Jameson, G., LaRoche, J., Liddicoat, M., Ling, R., Maldonado, M.
T., McKay, R. M., Nodder, S., Pickmere, S., Pridmore, R., Rintoul, S., Safi,
K., Sutton, P., Strzepek, R., Tanneberger, K., Turner, S., Waite, A., and
Zeldis, J.: A mesoscale phytoplankton bloom in the polar Southern Ocean
stimulated by iron fertilization, Nature, 407, 695–702, 2000b.
Boyd, P. W., Strzepek, R., Fu, F., and Hutchins, D. A.: Environmental control
of open-ocean phytoplankton groups: Now and in the future, Limnol. Oceanogr.,
55, 1353–1376, https://doi.org/10.4319/lo.2010.55.3.1353, 2010.
Brand, L. E., Sunda, W. G., and Guillard, R. R. L.: Limitation of marine
phytoplankton reproductive rates by zinc, manganese, and iron 1, Limnol.
Oceanogr., 28, 1182–1198, https://doi.org/10.4319/lo.1983.28.6.1182, 1983.
Brzezinski, M. A., Nelson, D. M., Franck, V. M., and Sigmon, D. E.: Silicon
dynamics within an intense open-ocean diatom bloom in the Pacific sector of
the Southern Ocean, Deep-Sea Res. Pt. II, 48, 3997–4018,
https://doi.org/10.1016/S0967-0645(01)00078-9, 2001.
Buesseler, K. O., Antia, A. N., Chen, M., Fowler, S. W., Gardner, W. D.,
Gustafsson, O., Harada, K., Michaels, A. F., der Loeff, M. R. v., and Sarin,
M.: An assessment of the use of sediment traps for estimating upper ocean
particle fuxes, J. Marine Res., 65, 345–416, 2007.
CARINA group: Temperature, salinity,
nutrients, carbon, and other profile data collected worldwide as part of the
CARINA project (NODC Accession 0057766), Version 2.2.,
https://doi.org/10.3334/CDIAC/OTG.NDP091, 2011.
Cermeño, P., Dutkiewicz, S., Harris, R. P., Follows, M., Schofield, O.,
and Falkowski, P. G.: The role of nutricline depth in regulating the ocean
carbon cycle, P. Natl. Acad. Sci. USA, 105, 20344–20349,
https://doi.org/10.1073/pnas.0811302106, 2008.
Closset, I., Cardinal, D., Bray, S. G., Thil, F., Djouraev, I.,
Rigual-Hernández, A. S., and Trull, T. W.: Seasonal variations, origin,
and fate of settling diatoms in the Southern Ocean tracked by silicon isotope
records in deep sediment traps, Global Biogeochem. Cy., 29, 1495–1510,
https://doi.org/10.1002/2015GB005180, 2015.
Cook, S. S., Whittock, L., Wright, S. W., and Hallegraeff, G. M.:
Photosynthetic pigment and genetic differences between two southern ocean
morphotypes of Emiliania huxleyi (haptophyta), J. Phycol., 47,
615–626, 2011.
Cook, S. S., Jones, R. C., Vaillancourt, R. E., and Hallegraeff, G. M.:
Genetic differentiation among Australian and Southern Ocean populations of
the ubiquitous coccolithophore Emiliania huxleyi (Haptophyta),
Phycologia, 52, 368–374, https://doi.org/10.2216/12-111.1, 2013.
Cubillos, J., Wright, S., Nash, G., De Salas, M., Griffiths, B., Tilbrook,
B., Poisson, A., and Hallegraeff, G.: Calcification morphotypes of the
coccolithophorid Emiliania huxleyi in the Southern Ocean: changes in
2001 to 2006 compared to historical data, Mar. Ecol.-Prog. Ser., 348, 47–54,
2007.
Deppeler, S. L. and Davidson, A. T.: Southern Ocean Phytoplankton in a
Changing Climate, Front. Mar. Sci., 4, https://doi.org/10.3389/fmars.2017.00040,
2017.
Ebersbach, F., Trull, T. W., Davies, D. M., and Bray, S. G.: Controls on
mesopelagic particle fluxes in the Sub-Antarctic and Polar Frontal Zones in
the Southern Ocean south of Australia in summer – Perspectives from
free-drifting sediment traps, Deep-Sea Res. Pt. II, 58, 2260–2276,
https://doi.org/10.1016/j.dsr2.2011.05.025, 2011.
Falkowski, P. G., Katz, M. E., Knoll, A. H., Quigg, A., Raven, J. A.,
Schofield, O., and Taylor, F. J. R.: The Evolution of Modern Eukaryotic
Phytoplankton, Science, 305, 354–360, https://doi.org/10.1126/science.1095964, 2004.
Feely, R. A., Doney, S. C., and Cooley, S. R.: Ocean acidification: present
conditions and future changes in a high-CO2 world, Oceanography, 22, 36–47, 2009.
Feng, Y., Roleda, M. Y., Armstrong, E., Boyd, P. W., and Hurd, C. L.:
Environmental controls on the growth, photosynthetic and calcification rates
of a Southern Hemisphere strain of the coccolithophore Emiliania huxleyi, Limnol. Oceanogr., 62, 519–540, https://doi.org/10.1002/lno.10442, 2017.
Fetterer, F., Knowles, K., Meier, W., Savoie, M., and Windnagel, A. K.: Sea
Ice Index, Version 3 [Sea Ice Extent], https://doi.org/10.7265/N5K072F8, 2017.
Flores, J. A. and Sierro, F. J.: A revised technique for the calculation of
calcareous nannofossil accumulation rates, Micropaleontology, 43, 321–324,
1997.
Freeman, N. M. and Lovenduski, N. S.: Decreased calcification in the Southern
Ocean over the satellite record, Geophys. Res. Lett., 42, 1834–1840,
https://doi.org/10.1002/2014GL062769, 2015.
Frölicher, T. L., Sarmiento, J. L., Paynter, D. J., Dunne, J. P.,
Krasting, J. P., and Winton, M.: Dominance of the Southern Ocean in
Anthropogenic Carbon and Heat Uptake in CMIP5 Models, J. Climate, 28,
862–886, https://doi.org/10.1175/jcli-d-14-00117.1, 2015.
Fuertes, M.-Á., Flores, J.-A., and Sierro, F. J.: The use of circularly
polarized light for biometry, identification and estimation of mass of
coccoliths, Mar. Micropaleontol., 113, 44–55,
https://doi.org/10.1016/j.marmicro.2014.08.007, 2014.
Gafar, N. A., Eyre, B. D., and Schulz, K. G.: A Conceptual Model for
Projecting Coccolithophorid Growth, Calcification and Photosynthetic Carbon
Fixation Rates in Response to Global Ocean Change, Front. Mar. Sci., 4,
https://doi.org/10.3389/fmars.2017.00433, 2018.
Gal, A., Wirth, R., Kopka, J., Fratzl, P., Faivre, D., and Scheffel, A.:
Macromolecular recognition directs calcium ions to coccolith mineralization
sites, Science, 353, 590–593, https://doi.org/10.1126/science.aaf7889, 2016.
Giraudeau, J. and Beaufort, L.: Coccolithophores: from extant populations to
fossil assemblages, Proxies in Late Cenozoic paleoceanography–Developments
in Marine Geology, edited by: Hillaire-Marcel, C. and De Vernal, A.,
Elsevier, 409–439, 2007.
Gladstone, R. M., Bigg, G. R., and Nicholls, K. W.: Iceberg trajectory
modeling and meltwater injection in the Southern Ocean, J. Geophys.
Res.-Oceans, 106, 19903–19915, https://doi.org/10.1029/2000JC000347, 2001.
Hagino, K., Bendif, E. M., Young, J. R., Kogame, K., Probert, I., Takano, Y.,
Horiguchi, T., de Vargas, C., and Okada, H.: New evidence for morphological
and genetic variation in the cosmopolitan coccolithophore Emiliania huxleyi (prymnesiophyceae) from the COX1b-ATP4 genes1, J. Phycol., 47,
1164–1176, https://doi.org/10.1111/j.1529-8817.2011.01053.x, 2011.
Hall, J. A. and Safi, K.: The impact of in situ Fe fertilisation on the
microbial food web in the Southern Ocean, Deep-Sea Res. Pt. II, 48,
2591–2613, https://doi.org/10.1016/S0967-0645(01)00010-8, 2001.
Henderiks, J., Winter, A., Elbrächter, M., Feistel, R., van der Plas, A.,
Nausch, G., and Barlow, R.: Environmental controls on Emiliania huxleyi morphotypes in the Benguela coastal upwelling system (SE Atlantic),
Mar. Ecol.-Prog. Ser., 448, 51–66, 2012.
Holligan, P. M., Viollier, M., Harbour, D. S., Camus, P., and
Champagne-Philippe, M.: Satellite and ship studies of coccolithophore
production along a continental shelf edge, Nature, 304, 339–342, 1983.
Holligan, P. M., Charalampopoulou, A., and Hutson, R.: Seasonal distributions
of the coccolithophore, Emiliania huxleyi, and of particulate
inorganic carbon in surface waters of the Scotia Sea, J. Marine Syst., 82,
195–205, https://doi.org/10.1016/j.jmarsys.2010.05.007, 2010.
Honjo, S. and Doherty, K. W.: Large aperture time-series sediment traps;
design objectives, construction and application, Deep-Sea Res. Pt. A, 35,
133–149, 1988.
Hopkins, J., Henson, S. A., Painter, S. C., Tyrrell, T., and Poulton, A. J.:
Phenological characteristics of global coccolithophore blooms, Global
Biogeochem. Cy., 29, 239–253, https://doi.org/10.1002/2014GB004919, 2015.
Kemp, A. E. S., Pike, J., Pearce, R. B., and Lange, C. B.: The “Fall dump”
– a new perspective on the role of a “shade flora” in the annual cycle of
diatom production and export flux, Deep-Sea Res. Pt. II, 47, 2129–2154,
2000.
Khatiwala, S., Primeau, F., and Hall, T.: Reconstruction of the history of
anthropogenic CO2 concentrations in the ocean, 462, 346–349, https://doi.org/10.1038/nature08526, 2009.
Klaas, C. and Archer, D. E.: Association of sinking organic matter with
various types of mineral ballast in the deep sea: Implications for the rain
ratio, Global Biogeochem. Cy., 16, 63-1–63-14, https://doi.org/10.1029/2001GB001765,
2002.
Knappertsbusch, M., Cortes, M. Y., and Thierstein, H. R.: Morphologic
variability of the coccolithophorid Calcidiscus leptoporus in the
plankton, surface sediments and from the Early Pleistocene, Marine
Micropaleontology, 30, 293–317, https://doi.org/10.1016/S0377-8398(96)00053-9, 1997.
Langer, G. and Benner, I.: Effect of elevated nitrate concentration on
calcification in Emiliania huxleyi, Journal of Nannoplankton Research, 30,
77–80, 2009.
Lee, R. B. Y., Mavridou, D. A. I., Papadakos, G., McClelland, H. L. O., and
Rickaby, R. E. M.: The uronic acid content of coccolith-associated
polysaccharides provides insight into coccolithogenesis and past climate,
Nat. Commun., 7, 13144, https://doi.org/10.1038/ncomms13144, 2016.
Levitus, S., Antonov, J. I., Boyer, T. P., and Stephens, C.: Warming of the
World Ocean, Science, 287, 2225–2229, https://doi.org/10.1126/science.287.5461.2225,
2000.
Litchman, E., Edwards, K. F., Klausmeier, C. A., and Thomas, M. K.:
Phytoplankton niches, traits and eco-evolutionary responses to global
environmental change, Mar. Ecol.-Prog. Ser., 470, 235–248, 2012.
Locarnini, R. A., Mishonov, A. V., Antonov, J. I., Boyer, T. P., Garcia, H.
E., Baranova, O. K., Zweng, M. M., and Johnson, D. R.: World Ocean Atlas
2009, Volume 1: Temperature, NOAA Atlas NESDIS 68, edited by: Levitus, S.,
U.S. Government Printing Office, Washington, D.C., 2010.
Locarnini, R. A., Mishonov, A. V., Antonov, J. I., Boyer, T. P., Garcia, H. E.,
Baranova, O. K., Zweng, M. M., Paver, C. R., Reagan, J. R., Johnson, D. R., Hamilton, M., and Seidov, D.:
World Ocean Atlas 2013, Volume 1: Temperature, S. Levitus, edited by: Mishonov,
A., NOAA Atlas NESDIS 73, 40 pp.,
2013.
Lochte, K., Ducklow, H. W., Fasham, M. J. R., and Stienen, C.: Plankton
succession and carbon cycling at 47∘ N 20∘ W during the
JGOFS North Atlantic Bloom Experiment, Deep-Sea Res. Pt. II, 40, 91–114,
https://doi.org/10.1016/0967-0645(93)90008-B, 1993.
Lombard, F., da Rocha, R. E., Bijma, J., and Gattuso, J.-P.: Effect of
carbonate ion concentration and irradiance on calcification in planktonic
foraminifera, Biogeosciences, 7, 247–255,
https://doi.org/10.5194/bg-7-247-2010, 2010.
Malinverno, E., Triantaphyllou, M. V., and Dimiza, M. D.: Coccolithophore
assemblage distribution along a temperate to polar gradient in theWest
Pacific sector of the Southern Ocean (January 2005), Micropaleontology, 61,
489–506, 2015.
Margalef, R.: Life-forms of phytoplankton as survival alternatives in an
unstable environment, Oceanol. Acta, 1, 493–509, 1978.
Massom, R., Reid, P., Stammerjohn, S., Raymond, B., Fraser, A., and Ushio,
S.: Change and Variability in East Antarctic Sea Ice Seasonality,
1979/80–2009/10, PLOS ONE, 8, e64756, https://doi.org/10.1371/journal.pone.0064756,
2013.
McNeil, B. I. and Matear, R. J.: Southern Ocean acidification: A tipping
point at 450-ppm atmospheric CO2, P. Natl. Acad. Sci., 105, 18860–18864,
2008.
Meier, K. J. S., Beaufort, L., Heussner, S., and Ziveri, P.: The role of
ocean acidification in Emiliania huxleyi coccolith thinning in the
Mediterranean Sea, Biogeosciences, 11, 2857–2869,
https://doi.org/10.5194/bg-11-2857-2014, 2014.
Merico, A., Tyrrell, T., Lessard, E. J., Oguz, T., Stabeno, P. J., Zeeman, S.
I., and Whitledge, T. E.: Modelling phytoplankton succession on the Bering
Sea shelf: role of climate influences and trophic interactions in
generating Emiliania huxleyi blooms 1997–2000, Deep-Sea Res. Pt. I,
51, 1803–1826, https://doi.org/10.1016/j.dsr.2004.07.003, 2004.
Milliman, J. D., Troy, P. J., Balch, W. M., Adams, A. K., Li, Y. H., and
Mackenzie, F. T.: Biologically mediated dissolution of calcium carbonate
above the chemical lysocline?, Deep-Sea Res. Pt. I, 46, 1653–1669,
https://doi.org/10.1016/S0967-0637(99)00034-5, 1999.
Moy, A. D., Howard, W. R., Bray, S. G., and Trull, T. W.: Reduced
calcification in modern Southern Ocean planktonic foraminifera, Nat. Geosci.,
2, 276–280, 2009.
Muggli, D. L. and Harrison, P. J.: Effects of iron on two oceanic
phytoplankters grown in natural NE subarctic pacific seawater with no
artificial chelators present, J. Exp. Mar. Biol. Ecol., 212, 225–237,
https://doi.org/10.1016/S0022-0981(96)02752-9, 1997.
Orr, J. C., Fabry, V. J., Aumont, O., Bopp, L., Doney, S. C., Feely, R. A.,
Gnanadesikan, A., Gruber, N., Ishida, A., and Joos, F.: Anthropogenic ocean
acidification over the twenty-first century and its impact on calcifying
organisms, Nature, 437, 681–686, 2005.
Orsi, A. H., Whitworth Iii, T., and Nowlin Jr., W. D.: On the meridional
extent and fronts of the Antarctic Circumpolar Current, Deep-Sea Res. Pt. I,
42, 641–673, https://doi.org/10.1016/0967-0637(95)00021-W, 1995.
Paasche, E.: Reduced coccolith calcite production under light-limited growth:
a comparative study of three clones of Emiliania huxleyi
(Prymnesiophyceae), Phycologia, 38, 508–516,
https://doi.org/10.2216/i0031-8884-38-6-508.1, 1999.
Paasche, E.: A review of the coccolithophorid Emiliania huxleyi
(Prymnesiophyceae), with particular reference to growth, coccolith formation,
and calcification-photosynthesis interactions, Phycologia, 40, 503–529,
https://doi.org/10.2216/i0031-8884-40-6-503.1, 2002.
Paasche, E. and Brubak, S.: Enhanced calcification in the coccolithophorid
Emiliania huxleyi (Haptophyceae) under phosphorus limitation, Phycologia, 33,
324–330, https://doi.org/10.2216/i0031-8884-33-5-324.1, 1994.
Pardo, P. C., Tilbrook, B., Langlais, C., Trull, T. W., and Rintoul, S. R.:
Carbon uptake and biogeochemical change in the Southern Ocean, south of
Tasmania, Biogeosciences, 14, 5217–5237,
https://doi.org/10.5194/bg-14-5217-2017, 2017.
Parslow, J. S., Boyd, P. W., Rintoul, S. R., and Griffiths, F. B.: A
persistent subsurface chlorophyll maximum in the Interpolar Frontal Zone
south of Australia: Seasonal progression and implications for
phytoplankton-light-nutrient interactions, J. Geophys. Res.-Oceans, 106,
31543–31557, https://doi.org/10.1029/2000JC000322, 2001.
Passow, U. and De La Rocha, C. L.: Accumulation of mineral ballast on organic
aggregates, Global Biogeochem. Cy., 20, GB1013, https://doi.org/10.1029/2005GB002579,
2006.
Patil, S. M., Mohan, R., Shetye, S. S., Gazi, S., Baumann, K.-H., and Jafar,
S.: Biogeographic distribution of extant Coccolithophores in the Indian
sector of the Southern Ocean, Mar. Micropaleontol., 137, 16–30,
https://doi.org/10.1016/j.marmicro.2017.08.002, 2017.
Poulton, A. J., Young, J. R., Bates, N. R., and Balch, W. M.: Biometry of
detached Emiliania huxleyi coccoliths along the Patagonian Shelf,
Mar. Ecol.-Prog. Ser., 443, 1–17, 2011.
Quéguiner, B.: Iron fertilization and the structure of planktonic
communities in high nutrient regions of the Southern Ocean, Deep-Sea Res. Pt.
II, 90, 43–54, https://doi.org/10.1016/j.dsr2.2012.07.024, 2013.
Rembauville, M., Meilland, J., Ziveri, P., Schiebel, R., Blain, S., and
Salter, I.: Planktic foraminifer and coccolith contribution to carbonate
export fluxes over the central Kerguelen Plateau, Deep-Sea Res. Pt. I, 111,
91–101, https://doi.org/10.1016/j.dsr.2016.02.017, 2016.
Reynolds, R. W., Rayner, N. A., Smith, T. M., Stokes, D. C., and Wang, W.: An
Improved In Situ and Satellite SST Analysis for Climate, J. Climate, 15,
1609–1625, https://doi.org/10.1175/1520-0442(2002)015<1609:aiisas>2.0.co;2, 2002.
Ridgwell, A. and Zeebe, R. E.: The role of the global carbonate cycle in the
regulation and evolution of the Earth system, Earth Planet. Sc. Lett., 234,
299–315, https://doi.org/10.1016/j.epsl.2005.03.006, 2005.
Rigual-Hernandez, A. S. and Trull, T. W.: Coccolithophore species fluxes in the Australian sector of the southern Antarctic Zone, Australian Antarctic Data
Centre,
https://doi.org/10.4225/15/5ab86f35e277e, 2018.
Rigual-Hernández, A. S., Trull, T. W., Bray, S. G., Closset, I., and
Armand, L. K.: Seasonal dynamics in diatom and particulate export fluxes to
the deep sea in the Australian sector of the southern Antarctic Zone, J.
Marine Syst., 142, 62–74, https://doi.org/10.1016/j.jmarsys.2014.10.002, 2015a.
Rigual-Hernández, A. S., Trull, T. W., Bray, S. G., Cortina, A., and
Armand, L. K.: Latitudinal and temporal distributions of diatom populations
in the pelagic waters of the Subantarctic and Polar Frontal zones of the
Southern Ocean and their role in the biological pump, Biogeosciences, 12,
5309–5337, https://doi.org/10.5194/bg-12-5309-2015, 2015b.
Rost, B. and Riebesell, U.: Coccolithophores and the biological pump:
responses to environmental changes, in: Coccolithophores: From Molecular
Processes to Global Impact, edited by: Thierstein, H. R. and Young, J. R.,
Springer Berlin Heidelberg, Berlin, Heidelberg, 99–125, 2004.
Saavedra-Pellitero, M., Baumann, K.-H., Flores, J.-A., and Gersonde, R.:
Biogeographic distribution of living coccolithophores in the Pacific sector
of the Southern Ocean, Mar. Micropaleontol., 109, 1–20, 2014.
Salter, I., Schiebel, R., Ziveri, P., Movellan, A., Lampitt, R., and Wolff,
G. A.: Carbonate counter pump stimulated by natural iron fertilization in the
Polar Frontal Zone, Nat. Geosci., 7, 885–889, https://doi.org/10.1038/ngeo2285, 2014.
Sarmiento, J. L., Gruber, N., Brzezinski, M. A., and Dunne, J. P.:
High-latitude controls of thermocline nutrients and low latitude biological
productivity, Nature, 427, 56–60, 2004a.
Sarmiento, J. L., Slater, R., Barber, R., Bopp, L., Doney, S. C., Hirst, A.
C., Kleypas, J., Matear, R., Mikolajewicz, U., Monfray, P., Soldatov, V.,
Spall, S. A., and Stouffer, R.: Response of ocean ecosystems to climate
warming, Global Biogeochem. Cy., 18, GB3003, https://doi.org/10.1029/2003GB002134, 2004b.
Saruwatari, K., Satoh, M., Harada, N., Suzuki, I., and Shiraiwa, Y.: Change
in coccolith size and morphology due to response to temperature and salinity
in coccolithophore Emiliania huxleyi (Haptophyta) isolated from the Bering
and Chukchi seas, Biogeosciences, 13, 2743–2755,
https://doi.org/10.5194/bg-13-2743-2016, 2016.
Schulz, K., Zondervan, I., Gerringa, L., Timmermans, K., Veldhuis, M., and
Riebesell, U.: Effect of trace metal availability on coccolithophorid
calcification, Nature, 430, 673–676, 2004.
Shadwick, E. H., Trull, T., Thomas, H., and Gibson, J. A. E.: Vulnerability of
Polar Oceans to Anthropogenic Acidification: Comparison of Arctic and Antarctic Seasonal Cycles, Scientific
Reports,
3, 1–7, 2013.
Shadwick, E. H., Tilbook, B., Cassar, N., Trull, T. W., and Rintoul, S. R.: Summertime physical and biological controls on O2 and CO2 in the Australian Sector of the Southern Ocean, J. Marine
Syst.,
147, 21–28, 2015a.
Shadwick, E. H., Trull, T. W., Tilbrook, B., Sutton, A. J., Schulz, E., and Sabine, C. L.:
Seasonality of biological and physical controls on surface ocean CO2 from hourly
observations at the Southern Ocean Time Series site south of Australia,
Global Biogeochem. Cy., 29, 223–238, https://doi.org/10.1002/2014GB004906, 2015b.
Siegel, D. A. and Deuser, W. G.: Trajectories of sinking particles in the
Sargasso Sea: modeling of statistical funnels above deep-ocean sediment
traps, Deep-Sea Res. Pt. I, 44, 1519–1541,
https://doi.org/10.1016/S0967-0637(97)00028-9, 1997.
Siegel, D. A., Fields, E., and Buesseler, K. O.: A bottom-up view of the
biological pump: Modeling source funnels above ocean sediment traps, Deep-Sea
Res. Pt. I, 55, 108–127, https://doi.org/10.1016/j.dsr.2007.10.006, 2008.
Sieracki, M. E., Verity, P. G., and Stoecker, D. K.: Plankton community
response to sequential silicate and nitrate depletion during the 1989 North
Atlantic spring bloom, Deep-Sea Res. Pt. II, 40, 213–225,
https://doi.org/10.1016/0967-0645(93)90014-E, 1993.
Sigman, D. M. and Boyle, E. A.: Glacial/interglacial variations in
atmospheric carbon dioxide, Nature, 407, 859–869, 2000.
Smith, H. E. K., Tyrrell, T., Charalampopoulou, A., Dumousseaud, C., Legge,
O. J., Birchenough, S., Pettit, L. R., Garley, R., Hartman, S. E., Hartman,
M. C., Sagoo, N., Daniels, C. J., Achterberg, E. P., and Hydes, D. J.:
Predominance of heavily calcified coccolithophores at low CaCO3 saturation
during winter in the Bay of Biscay, P. Natl. Acad. Sci. USA, 109, 8845–8849,
https://doi.org/10.1073/pnas.1117508109, 2012.
Sohrin, Y., Iwamoto, S., Matsui, M., Obata, H., Nakayama, E., Suzuki, K.,
Handa, N., and Ishii, M.: The distribution of Fe in the Australian sector of
the Southern Ocean, Deep-Sea Res. Pt. I, 47, 55–84,
https://doi.org/10.1016/S0967-0637(99)00049-7, 2000.
Tagliabue, A., Sallee, J.-B., Bowie, A. R., Levy, M., Swart, S., and Boyd, P.
W.: Surface-water iron supplies in the Southern Ocean sustained by deep
winter mixing, Nat. Geosci., 7, 314–320, https://doi.org/10.1038/ngeo2101, 2014.
Takahashi, T., Sutherland, S. C., Wanninkhof, R., Sweeney, C., Feely, R. A.,
Chipman, D. W., Hales, B., Friederich, G., Chavez, F., Sabine, C., Watson,
A., Bakker, D. C. E., Schuster, U., Metzl, N., Yoshikawa-Inoue, H., Ishii,
M., Midorikawa, T., Nojiri, Y., Körtzinger, A., Steinhoff, T., Hoppema,
M., Olafsson, J., Arnarson, T. S., Tilbrook, B., Johannessen, T., Olsen, A.,
Bellerby, R., Wong, C. S., Delille, B., Bates, N. R., and de Baar, H. J. W.:
Climatological mean and decadal change in surface ocean pCO2, and net
sea–air CO2 flux over the global oceans, Deep-Sea Res. Pt. II, 56,
554–577, https://doi.org/10.1016/j.dsr2.2008.12.009, 2009.
Thunell, R., Pride, C., Ziveri, P., Muller-Karger, F., Sancetta, C., and
Murray, D.: Plankton response to physical forcing in the Gulf of California,
J. Plankton Res., 18, 2017–2026, https://doi.org/10.1093/plankt/18.11.2017, 1996.
Trull, T. W., Bray, S. G., Manganini, S. J., Honjo, S., and François, R.:
Moored sediment trap measurements of carbon export in the Subantarctic and
Polar Frontal zones of the Southern Ocean, south of Australia, J. Geophys.
Res.-Oceans, 106, 31489–31509, https://doi.org/10.1029/2000JC000308, 2001a.
Trull, T. W., Rintoul, S. R., Hadfield, M., and Abraham, E. R.: Circulation
and seasonal evolution of polar waters south of Australia: implications for
iron fertilization of the Southern Ocean, Deep-Sea Res. Pt. II, 48,
2439–2466, https://doi.org/10.1016/S0967-0645(01)00003-0, 2001b.
Trull, T. W., Sedwick, P. N., Griffiths, F. B., and Rintoul, S. R.:
Introduction to special section: SAZ Project, J. Geophys. Res.-Oceans, 106,
31425–31429, https://doi.org/10.1029/2001JC001008, 2001c.
Trull, T. W., Passmore, A., Davies, D. M., Smit, T., Berry, K., and Tilbrook,
B.: Distribution of planktonic biogenic carbonate organisms in the Southern
Ocean south of Australia: a baseline for ocean acidification impact
assessment, Biogeosciences, 15, 31–49,
https://doi.org/10.5194/bg-15-31-2018, 2018.
Turner, J. T.: Zooplankton fecal pellets, marine snow and sinking
phytoplankton blooms, Aquat. Microb. Ecol., 27, 57–102, 2002.
Turner, J. T.: Zooplankton fecal pellets, marine snow, phytodetritus and the
ocean's biological pump, Prog. Oceanogr., 130, 205–248,
https://doi.org/10.1016/j.pocean.2014.08.005, 2015.
Wilks, J. V., Rigual-Hernández, A. S., Trull, T. W., Bray, S. G., Flores,
J.-A., and Armand, L. K.: Biogeochemical flux and phytoplankton succession: A
year-long sediment trap record in the Australian sector of the Subantarctic
Zone, Deep-Sea Res. Pt. I, 121, 143–159, https://doi.org/10.1016/j.dsr.2017.01.001,
2017.
Winter, A., Henderiks, J., Beaufort, L., Rickaby, R. E., and Brown, C. W.:
Poleward expansion of the coccolithophore Emiliania huxleyi, J.
Plankton Res., 36, 316–325, 2014.
Young, J., Geisen, M., Cross, L., Kleijne, A., Sprengel, C., Probert, I., and
Østergaard, J.: A guide to extant coccolithophore taxonomy, Journal of
Nanoplankton Research Special Issue 1, International Nannoplankton
Association, 124 pp., 2003.
Young, J. R. and Westbroek, P.: Genotypic variation in the coccolithophorid
species Emiliania huxleyi, Mar. Micropaleontol., 18, 5–23,
https://doi.org/10.1016/0377-8398(91)90004-P, 1991.
Young, J. R. and Ziveri, P.: Calculation of coccolith volume and it use in
calibration of carbonate flux estimates, Deep-Sea Res. Pt. II, 47,
1679–1700, https://doi.org/10.1016/S0967-0645(00)00003-5, 2000.
Zeebe, R. E.: History of Seawater Carbonate Chemistry, Atmospheric CO2,
and Ocean Acidification, Annu. Rev. Earth Planet. Sc., 40, 141–165,
https://doi.org/10.1146/annurev-earth-042711-105521, 2012.
Zeldis, J.: Mesozooplankton community composition, feeding, and export
production during SOIREE, Deep-Sea Res. Pt. II, 48, 2615–2634,
https://doi.org/10.1016/S0967-0645(01)00011-X, 2001.
Zhang, X., Lewis, M., Lee, M., Johnson, B., and Korotaev, G.: The volume
scattering function of natural bubble populations, Limnol. Oceanogr., 47,
1273–1282, 2002.
Zondervan, I.: The effects of light, macronutrients, trace metals and CO2
on the production of calcium carbonate and organic carbon in coccolithophores
– A review, Deep-Sea Res. Pt. II, 54, 521–537,
https://doi.org/10.1016/j.dsr2.2006.12.004, 2007.
Short summary
Long-term and annual field observations on key organisms are a critical basis for predicting changes in Southern Ocean ecosystems. Coccolithophores are the most abundant calcium-carbonate-producing phytoplankton and play an important role in Southern Ocean biogeochemical cycles. In this study we document the composition, degree of calcification and annual cycle of coccolithophore communities in one of the largest unexplored regions of the world oceans: the Antarctic zone.
Long-term and annual field observations on key organisms are a critical basis for predicting...
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