Articles | Volume 13, issue 8
https://doi.org/10.5194/bg-13-2579-2016
© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.
the Creative Commons Attribution 3.0 License.
Special issue:
https://doi.org/10.5194/bg-13-2579-2016
© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.
the Creative Commons Attribution 3.0 License.
Research article
| 
29 Apr 2016
Research article |
| 29 Apr 2016
Foraging segregation of two congeneric diving seabird species breeding on St. George Island, Bering Sea
Nobuo Kokubun
CORRESPONDING AUTHOR
National Institute of Polar Research 10-3 Midori-cho,
Tachikawa, Tokyo 190-8518, Japan
Department of Polar Science, School of Multidisciplinary Sciences,
SOKENDAI (the Graduate University for Advanced Studies), 10-3 Midori-cho,
Tachikawa, Tokyo 190-8518, Japan
Takashi Yamamoto
National Institute of Polar Research 10-3 Midori-cho,
Tachikawa, Tokyo 190-8518, Japan
Graduate School of Fisheries Sciences, Hokkaido University, 3-1-1
Minato-cho, Hakodate, Hokkaido 040-0821, Japan
present address: Graduate School of Environmental Studies, Nagoya University, Furo-cho, Chikusa-ku, Nagoya,
Aichi 464-8601, Japan
Nobuhiko Sato
Department of Polar Science, School of Multidisciplinary Sciences,
SOKENDAI (the Graduate University for Advanced Studies), 10-3 Midori-cho,
Tachikawa, Tokyo 190-8518, Japan
Yutaka Watanuki
Graduate School of Fisheries Sciences, Hokkaido University, 3-1-1
Minato-cho, Hakodate, Hokkaido 040-0821, Japan
Alexis Will
Institute of Arctic Biology, Department of Biology and Wildlife,
University of Alaska Fairbanks, Irving 311, Alaska 99503, USA
Alexander S. Kitaysky
Institute of Arctic Biology, Department of Biology and Wildlife,
University of Alaska Fairbanks, Irving 311, Alaska 99503, USA
Akinori Takahashi
National Institute of Polar Research 10-3 Midori-cho,
Tachikawa, Tokyo 190-8518, Japan
Department of Polar Science, School of Multidisciplinary Sciences,
SOKENDAI (the Graduate University for Advanced Studies), 10-3 Midori-cho,
Tachikawa, Tokyo 190-8518, Japan
Related authors
Takashi Yamamoto, Nobuo Kokubun, Dale M. Kikuchi, Nobuhiko Sato, Akinori Takahashi, Alexis P. Will, Alexander S. Kitaysky, and Yutaka Watanuki
Biogeosciences, 13, 2405–2414, https://doi.org/10.5194/bg-13-2405-2016, https://doi.org/10.5194/bg-13-2405-2016, 2016
Short summary
Short summary
In the southeastern Bering Sea, red-legged kittiwakes did not change their foraging locations largely in relation to the differences in marine environment between 2 years probably due to their reliance on myctophids, while thick-billed murres showed fluctuations in physiological condition and flexible foraging behavior on the shelf. These results suggest that the responses of ecosystem dynamics and seabirds to climate variability may differ between the oceanic basin and shelf regions.
Bungo Nishizawa, Kohei Matsuno, Elizabeth A. Labunski, Kathy J. Kuletz, Atsushi Yamaguchi, and Yutaka Watanuki
Biogeosciences, 14, 203–214, https://doi.org/10.5194/bg-14-203-2017, https://doi.org/10.5194/bg-14-203-2017, 2017
Short summary
Short summary
To investigate seasonal distribution of short-tailed shearwaters we conducted vessel-based seabird surveys and net samplings of krill, i.e., their main prey, during summer and fall in the Bering Sea and Chukchi Sea. Short-tailed shearwaters in the Bering Sea during summer moved to feed in the Chukchi Sea during fall, which might be associated with the seasonal increase in krill size in the Chukchi Sea.
Hiroko Sasaki, Kohei Matsuno, Amane Fujiwara, Misaki Onuka, Atsushi Yamaguchi, Hiromichi Ueno, Yutaka Watanuki, and Takashi Kikuchi
Biogeosciences, 13, 4555–4567, https://doi.org/10.5194/bg-13-4555-2016, https://doi.org/10.5194/bg-13-4555-2016, 2016
Short summary
Short summary
We constructed the habitat models explaining the spatial patterns of the large and small Arctic copepods and the Pacific copepods of the northern Bering Sea and Chukchi Sea. The adequate models show the importance of water masses and sea ice retreat timing. This finding also indicates that earlier sea ice retreat has positive effects on the abundance of all copepod groups in the northern Bering and Chukchi seas, suggesting a change from a pelagic–benthic-type ecosystem to a pelagic–pelagic type.
Takashi Yamamoto, Nobuo Kokubun, Dale M. Kikuchi, Nobuhiko Sato, Akinori Takahashi, Alexis P. Will, Alexander S. Kitaysky, and Yutaka Watanuki
Biogeosciences, 13, 2405–2414, https://doi.org/10.5194/bg-13-2405-2016, https://doi.org/10.5194/bg-13-2405-2016, 2016
Short summary
Short summary
In the southeastern Bering Sea, red-legged kittiwakes did not change their foraging locations largely in relation to the differences in marine environment between 2 years probably due to their reliance on myctophids, while thick-billed murres showed fluctuations in physiological condition and flexible foraging behavior on the shelf. These results suggest that the responses of ecosystem dynamics and seabirds to climate variability may differ between the oceanic basin and shelf regions.
Related subject area
Biodiversity and Ecosystem Function: Marine
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
Phytoplankton Response to Increased Nickel in the Context of Ocean Alkalinity Enhancement
Impact of deoxygenation and warming on global marine species in the 21st century
Building your own mountain: The effects, limits, and drawbacks of cold-water coral ecosystem engineering
Approaching the diversity and density dilemma of the lebensspuren-tracemaker tandem: a study case from abyssal Northwest Pacific
A critical trade-off between nitrogen quota and growth allows Coccolithus braarudii life cycle phases’ to exploit varying environment
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
Factors controlling the competition between Phaeocystis and diatoms in the Southern Ocean and implications for carbon export fluxes
Characterization of particle-associated and free-living bacterial and archaeal communities along the water columns of the South China Sea
Adult life strategy affects distribution patterns in abyssal isopods – implications for conservation in Pacific nodule areas
Diversity and distribution of nitrogen fixation genes in the oxygen minimum zones of the world oceans
Structure and function of epipelagic mesozooplankton and their response to dust deposition events during the spring PEACETIME cruise in the Mediterranean Sea
Distribution of planktonic foraminifera in the subtropical South Atlantic: depth hierarchy of controlling factors
Technical note: Estimating light-use efficiency of benthic habitats using underwater O2 eddy covariance
Ocean acidification reduces growth and grazing impact of Antarctic heterotrophic nanoflagellates
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.
Xiaoke Xin, Giulia Faucher, and Ulf Riebesell
Biogeosciences Discuss., https://doi.org/10.5194/bg-2023-130, https://doi.org/10.5194/bg-2023-130, 2023
Revised manuscript accepted for BG
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.
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.
Anna-Selma van der Kaaden, Sandra R. Maier, Siluo Chen, Laurence H. De Clippele, Evert de Froe, Theo Gerkema, Johan van de Koppel, Christian Mohn, Max Rietkerk, Karline Soetaert, and Dick van Oevelen
EGUsphere, https://doi.org/10.5194/egusphere-2023-949, https://doi.org/10.5194/egusphere-2023-949, 2023
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 not, which is typically difficult. Around coral mounds hydrodynamic zones 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.
Olmo Miguez-Salas, Angelika Brandt, Henry Knauber, and Torben Riehl
Biogeosciences Discuss., https://doi.org/10.5194/bg-2023-81, https://doi.org/10.5194/bg-2023-81, 2023
Revised manuscript accepted for BG
Short summary
Short summary
In the deep-sea, the interaction between benthic fauna (tracemaker) and substrate can be preserved as traces (i.e., lebensspuren) which are common features of deep seafloor landscapes, rendering them promising proxies to infer biodiversity. No general correlation could be observed between traces and benthic fauna. However, local correlation was observed between specific stations. Density was either positively or negatively correlated with tracemaker densities, depending on the traces.
Joost de Vries, Fanny Monteiro, Gerald Langer, Colin Brownlee, and Glen Wheeler
EGUsphere, https://doi.org/10.5194/egusphere-2023-880, https://doi.org/10.5194/egusphere-2023-880, 2023
Short summary
Short summary
Calcifying phytoplankton (coccolithophores) utilize a life cycle in which they can grow and divide in 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.
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.
Cara Nissen and Meike Vogt
Biogeosciences, 18, 251–283, https://doi.org/10.5194/bg-18-251-2021, https://doi.org/10.5194/bg-18-251-2021, 2021
Short summary
Short summary
Using a regional Southern Ocean ecosystem model, we find that the relative importance of Phaeocystis and diatoms at high latitudes is controlled by iron and temperature variability, with light levels controlling the seasonal succession in coastal areas. Yet, biomass losses via aggregation and grazing matter as well. We show that the seasonal succession of Phaeocystis and diatoms impacts the seasonality of carbon export fluxes with ramifications for nutrient cycling and food web dynamics.
Jiangtao Li, Lingyuan Gu, Shijie Bai, Jie Wang, Lei Su, Bingbing Wei, Li Zhang, and Jiasong Fang
Biogeosciences, 18, 113–133, https://doi.org/10.5194/bg-18-113-2021, https://doi.org/10.5194/bg-18-113-2021, 2021
Short summary
Short summary
Few studies have focused on the particle-attached (PA) and free-living (FL) microbes of the deep ocean. Here we determined PA and FL microbial communities along depth profiles of the SCS. PA and FL fractions accommodated divergent microbial compositions, and most of them are potentially generalists with PA and FL dual lifestyles. A potential vertical connectivity between surface-specific microbes and those in the deep ocean was indicated, likely through microbial attachment to sinking particles.
Saskia Brix, Karen J. Osborn, Stefanie Kaiser, Sarit B. Truskey, Sarah M. Schnurr, Nils Brenke, Marina Malyutina, and Pedro Martinez Arbizu
Biogeosciences, 17, 6163–6184, https://doi.org/10.5194/bg-17-6163-2020, https://doi.org/10.5194/bg-17-6163-2020, 2020
Short summary
Short summary
The Clarion–Clipperton Fracture Zone (CCZ) located in the Pacific is commercially the most important area of proposed manganese nodule mining. Extraction of this will influence the life and distribution of small deep-sea invertebrates like peracarid crustaceans, of which >90 % are undescribed species new to science. We are doing a species delimitation approach as baseline for an ecological interpretation of species distribution and discuss the results in light of future deep-sea conservation.
Amal Jayakumar and Bess B. Ward
Biogeosciences, 17, 5953–5966, https://doi.org/10.5194/bg-17-5953-2020, https://doi.org/10.5194/bg-17-5953-2020, 2020
Short summary
Short summary
Diversity and community composition of nitrogen-fixing microbes in the three main oxygen minimum zones of the world ocean were investigated using nifH clone libraries. Representatives of three main clusters of nifH genes were detected. Sequences were most diverse in the surface waters. The most abundant OTUs were affiliated with Alpha- and Gammaproteobacteria. The sequences were biogeographically distinct and the dominance of a few OTUs was commonly observed in OMZs in this (and other) studies.
Guillermo Feliú, Marc Pagano, Pamela Hidalgo, and François Carlotti
Biogeosciences, 17, 5417–5441, https://doi.org/10.5194/bg-17-5417-2020, https://doi.org/10.5194/bg-17-5417-2020, 2020
Short summary
Short summary
The impact of Saharan dust deposition events on the Mediterranean Sea ecosystem was studied during a basin-scale survey (PEACETIME cruise, May–June 2017). Short-term responses of the zooplankton community were observed after episodic dust deposition events, highlighting the impact of these events on productivity up to the zooplankton level in the poorly fertilized pelagic ecosystems of the southern Mediterranean Sea.
Douglas Lessa, Raphaël Morard, Lukas Jonkers, Igor M. Venancio, Runa Reuter, Adrian Baumeister, Ana Luiza Albuquerque, and Michal Kucera
Biogeosciences, 17, 4313–4342, https://doi.org/10.5194/bg-17-4313-2020, https://doi.org/10.5194/bg-17-4313-2020, 2020
Short summary
Short summary
We observed that living planktonic foraminifera had distinct vertically distributed communities across the Subtropical South Atlantic. In addition, a hierarchic alternation of environmental parameters was measured to control the distribution of planktonic foraminifer's species depending on the water depth. This implies that not only temperature but also productivity and subsurface processes are signed in fossil assemblages, which could be used to perform paleoceanographic reconstructions.
Karl M. Attard and Ronnie N. Glud
Biogeosciences, 17, 4343–4353, https://doi.org/10.5194/bg-17-4343-2020, https://doi.org/10.5194/bg-17-4343-2020, 2020
Short summary
Short summary
Light-use efficiency defines the ability of primary producers to convert sunlight energy to primary production. This report provides a framework to compute hourly and daily light-use efficiency using underwater eddy covariance, a recent technological development that produces habitat-scale rates of primary production for many different habitat types. The approach, tested on measured flux data, provides a useful means to compare habitat productivity across time and space.
Stacy Deppeler, Kai G. Schulz, Alyce Hancock, Penelope Pascoe, John McKinlay, and Andrew Davidson
Biogeosciences, 17, 4153–4171, https://doi.org/10.5194/bg-17-4153-2020, https://doi.org/10.5194/bg-17-4153-2020, 2020
Short summary
Short summary
Our study showed how ocean acidification can exert both direct and indirect influences on the interactions among trophic levels within the microbial loop. Microbial grazer abundance was reduced at CO2 concentrations at and above 634 µatm, while microbial communities increased in abundance, likely due to a reduction in being grazed. Such changes in predator–prey interactions with ocean acidification could have significant effects on the food web and biogeochemistry in the Southern Ocean.
Cited articles
Barger, C. P. and Kitaysky, A. S.: Isotopic segregation between sympatric seabird species increases with nutritional stress, Biol. Lett., 8, 442–445, 2012.
Barger, C. P., Young, R. C., Cable, J. M., Ito, M., and Kitaysky, A. S.: Resource partitioning between sympatric seabird species increases during chick-rearing, Ecosphere, in press, 2016.
Barrett, R. T., Asheim, M., and Bakken, V.: Ecological relationships between two sympatric congeneric species, common murres and thick-billed murres, Uria aalge and U. lomvia, breeding in the Barents Sea, Can. J. Zoolog., 75, 618–631, 1997.
Barrett, R. T., Erikstad, K. E., Sandvik, H., Myksvoll, M., Jenni-Eierlmann, S., Kristensen, D. L., Moum, T., Reiertsen, T. K., and Vikebø, F.: The stress hormone corticosterone in a marine top predator reflects short-term changes in food availability, Ecol. Evol., 5, 1306–1317, 2015.
Benowitz-Fredericks, Z. M., Shultz, M. T., and Kitaysky, A. S.: Stress hormones suggest opposite trends of food availability for planktivorous and piscivorous seabirds in 2 years, Deep-Sea Res. Pt. II, 55, 1868–1876, 2008.
Bryant, R., Jones, I. L., and Hipfner, J. M.: Responses to changes in prey availability by common murres and thick-billed murres at the Gannet Islands, Labrador, Can. J. Zoolog., 77, 1278–1287, 1998.
Clavel, J., Julliard, R., and Devictor, V.: Worldwide decline of specialist species: toward a global functional homogenization?, Front. Ecol. Environ., 9, 222–228, 2011.
Coachman, L. K.: Circulation, water masses and fluxes on the southeastern Bering Sea Shelf, Cont. Shelf Res., 5, 23–108, 1986.
Croll, D. A. and McLaren, E.: Diving metabolism and thermoregulation in common and thick-billed murres, Comp. Physiol., 163, 160–166, 1993.
Croxall, J. P., Prince, P. A., and Reid, K.: Dietary segregation of krill-eating South Georgia seabirds, J. Zool., 242, 531–556, 1997.
Coyle, K. O., Eisner, L. B., Mueter, F. J., Pinchuk, A. I., Janout, M. A., Cieciel, K. D., Farley, E. V., and Andrews, A. G.: Climate change in the southeastern Bering Sea: impacts on pollock stocks and implications for the oscillating control hypothesis, Fish. Oceanogr., 20, 139–156, 2011.
Daunt, F., Peters, G., Scott, B., Gremillet, D., and Wanless, S.: Rapid-response recorders reveal interplay between marine physics and seabird behaviour, Mar. Ecol.-Prog. Ser., 255, 283–288, 2003.
Dragoo, D. E., Renner, H. M., and Irons, D. B.: Breeding status and population trends of seabirds in Alaska, 2014, US Fish and Wildlife Service Report AMNWR 2015/03, Homer, Alaska, 2015.
Elliott, K. H., Woo, K., Gaston, A. J., Benvenuti, S., Dall'Antonia, L., and Davoren, G. K.: Seabird foraging behaviour indicates prey type, Mar. Ecol.-Prog. Ser., 233, 89–103, 2008.
Elliott, K. H., Gaston, A. J., and Crump, D.: Sex-specific behavior by a monomorphic seabird represents risk partitioning, Behav. Ecol., 21, 1024–1032, 2010.
Falk, K., Benvenuti, S., Dall'Antonia, L., Kampp, K., and Ribolini, A.: Time allocation and foraging behaviour of chick rearing Brünnich's guillemots Uria lomvia in high-arctic Greenland, Ibis, 143, 82–92, 2000.
Gallagher, A. J., Hammerschlag, N., Cooke, S. J., Costa, D. P., and Irschick, D. J.: Evolutionary theory as a tool for predicting extinction risk, Trends Ecol. Evol., 30, 61–65, 2015.
Gaston, A. J. and Jones, I. L.: The Auks: Alcidae, Oxford University Press, Oxford, London, 1998.
Griffiths, R., Double, M. C., Orr, K., and Dawson, R. J. G.: A DNA test to sex most birds, Mol. Ecol., 7, 1071–1075, 1998.
Harding, A., Paredes, R., Suryan, R., Roby, D., Irons, D., Orben, R., Renner, H., Young, R., Barger, C., Dorresteijn, I., and Kitaysky, A.: Does location really matter? An inter-colony comparison of seabirds breeding at varying distances from productive oceanographic features in the Bering Sea, Deep-Sea Res. Pt. II, 94, 178–191, 2013.
Hobson, K. A. and Clark, R. G.: Turnover of 13C in cellular and plasma fractions of blood: implications for nondestructive sampling in avian dietary studies, Auk, 110, 638–641, 1993.
Hobson, K. A., Fisk, A., Karnovsky, N., Holst, M., Gagnon, J.-M., and Fortier, M.: A stable isotope (δ13C, δ15N) model for the North Water food web: implications for evaluating trophodynamics and the flow of energy and contaminants, Deep-Sea Res. Pt. II, 49, 5131–5150, 2002.
Hunt Jr., G. L., Burgeson, B., and Sanger, G. A.: Feeding ecology of seabirds of the eastern Bering Sea, in: The Eastern Bering Sea shelf: oceanography and resources, edited by: Hood, D. and Calder, J. A., Juneau, AK: Office of Marine Pollution Assessment, National Oceanographic and Atmospheric Administration, 629–648, 1981a.
Hunt Jr., G. L., Eppley, Z., and Drury, W. H.: Breeding distribution and reproductive biology of marine birds in the eastern Bering Sea, in: The Eastern Bering Sea shelf: oceanography and resources, edited by: Hood, D. and Calder, J. A., Juneau, AK: Office of Marine Pollution Assessment, National Oceanographic and Atmospheric Administration, 649–687, 1981b.
Hunt Jr., G. L., Eppley, Z. A., and Schneider, D. C.: Reproductive performance of seabirds: the importance of population and colony size, Auk, 103, 306–317, 1986.
Hunt Jr., G. L., Coyle, K. O., Eisner, L. B., Farley, E. V., Heintz, R., A., Mueter, F., Napp, J. M., Overland, J. E., Ressler, P. H., Salo, S., and Stabeno. J.: Climate impacts on eastern Bering Sea foodwebs: a synthesis of new data and an assessment of the Oscillating Control Hypothesis, ICES J. Mar. Sci., 68, 1230–1243, 2011.
Hurst, T. P.: Thermal effects on behavior of juvenile walleye pollock (Theragra chalcogramma): implications for energetics and food web models, Can. J. Fish. Aquat. Sci., 64, 449–457, 2007.
Ianelli, J. N., Barbeaux, S., Honkalehto, T., Kotwicki, S., Aydin, K., and Williamson, N.: Assessment of the walleye pollock stock in the Eastern Bering Sea, in: Stock Assessment and Fishery Evaluation Report of the Groundfish Resources of the Bering Sea/Aleutian Islands Regions. Anchorage: North Pacific Fisheries Management Council, section 1, 49–148, 2009.
Irons, D. B., Anker-Nilssen, T., Gaston, A. J., Byrd, G. V., Falk, K., Gilchrist, G., Hario, M., Hjernquist, M., Krasnov, Y. V., Mosvech, A., Olsen, B., Peterson, A., Reid, J. B., Robertson, G. J., Strøm, H., and Wohl, K. D.: Fluctuations in circumpolar seabird populations linked to climate oscillations, Glob. Change Biol., 14, 1455–1463, 2008.
Jones, I. L., Rowe, S., Carr, S. M., Frazer, G., and Taylor, P.: Different patterns of parental effort during chick-rearing by female and male thick-billed murres (Uria lomvia) at a low-arctic colony, Auk, 119, 1064–1074, 2002.
Jones, N. M., Hoover, B. A., Heppel, S. A., and Kuletz, K.: A cross-shelf gradient in δ15N stable isotope values of krill and pollock indicates seabird foraging patterns in the Bering Sea, Deep-Sea Res. Pt. II, 109, 241–250, 2014.
Kinder, T. H., Hunt Jr., G. L., Schneider, D., and Schumacher, J. D.: Correlations between seabirds and oceanic fronts around the Pribilof Islands, Alaska, Estuar. Coast. Shelf S., 16, 309–319, 1983.
Kitaysky, A. S. and Golubova, E. G.: Climate change causes contrasting trends in reproductive performance of planktivorous and piscivorous alcids, J. Anim. Ecol., 69, 248–262, 2000.
Kitaysky, A. S., Piatt. J. F., and Wingfield, J. C.: Stress hormones link food availability and population processes in seabirds, Mar. Ecol.-Prog. Ser., 352, 245–258, 2007.
Kitaysky, A. S., Piatt, J. F., Hatch, S. A., Kitaiskaiya, E. V., Benowitz-Frederics, Z. M., Shultz, M. T., and Wingfield, J. C.: Food availability and population processes: severity of nutritional stress during reproduction predicts survival of long-lived seabirds, Func. Ecol., 24, 625–637, 2010.
Kokubun, N., Takahashi, A., Mori, Y., Watanabe, S., and Shin, H.-C.: Comparison of diving behavior and habitat use between chinstrap and gentoo penguins breeding in the South Shetland Islands, Antarctica, Mar. Biol., 157, 811–825, 2010a.
Kokubun, N., Takahashi, A., Ito, M., Matsumoto, K., Kitaysky, A. S., and Watanuki, Y.: Annual variation in the foraging behaviour of thick-billed murres in relation to upper-ocean thermal structure around St. George Island, Bering Sea, Aquat. Biol., 8, 289–298, 2010b.
Lang, G. M., Brodeur, R. D., Napp, J., M., and Schabetsberger, R.: Variation in groundfish predation on juvenile walleye Pollock relative to hydrographic structure near the Pribilof Islands, Alaska, ICES J. Mar. Sci., 57, 265–271, 2000.
Linnebjerg, J. F., Guilford, T., Reuleaux, A., Mosbech, A., and Frediriksen, M.: Sympatric breeding auks shift between dietary and spatial resource partitioning across the annual cycle, Plos One, 8, e72987, https://doi.org/10.1371/journal.pone.0072987, 2013.
Linnebjerg, J. F., Reuleaux, A., Mouritsen, K. N., and Frederiksen, M.: Foraging ecology of three sympatric breeding alcids in a declining colony in southwest Greenland, Waterbirds, 38, 143–152, 2015.
Lynnes, A. S., Reid, K., Croxall, J. P., and Trathan, P. N.: Conflict or coexistence? Foraging distribution and competition for prey between Adélie and chinstrap penguins, Mar. Biol., 141, 1165–1174, 2002.
Masello, J. F., Hundry, R., Poisbleau, M., Demongin, L., Voigt, C. C., Wiekelski, M., and Quillfeldt, P.: Ecosphere Diving seabirds share foraging space and time within and among species, Ecosphere, 1, 1–28, 2010.
Mori, Y. and Boyd, I.: Segregation of foraging between two sympatric penguin species: does rate maximization make the difference?, Mar. Ecol.-Prog. Ser., 275, 241–249, 2004.
Mudge, M. L., Pietrzak, K. W., Drummond, B. A., and Romano, M. D.: Biological monitoring at St. George Island, Alaska, in 2014, US Fish and Wildl. Serv. Rep., AMNWR 2015/02, Homer, Alaska, 2015.
Navarro, J., Votier, S. C., Aguzzi, J., Chiesa, J. J., Forero, M. G., and Phillips, R. A.: Ecological segregation in space, time and trophic niche of sympatric planktivorous petrels, Plos One, 8, e62897, https://doi.org/10.1371/journal.pone.0062897, 2013.
Niizuma, Y., Takahashi, A., Kuroki, M., and Watanuki, Y.: Sexing by external measurements of adult rhinoceros auklets breeding on Teuri island, Jpn. J. Ornithol., 48, 145–150, 1999.
Ogi, H.: Ecology of murres in subarctic Pacific regions, Aquabiology, 2, 19–26, 1979 (in Japanese with English abstract).
Orben, R. A., Paredes, R., Roby, D. D., Irons, D. D., and Shaffer, S. A.: Body size affects individual winter foraging strategies of thick-billed murres in the Bering Sea, J. Anim. Ecol., 84, 1589–1599, 2015.
Paredes, R., Jones, I. L., Boness, D. J., Trembley, Y., and Renner, M.: Sex-specific differences in diving behaviour of two sympatric Alcini species: thick-billed murres and razorbills, Can. J. Zoolog., 86, 610–622, 2008.
Paredes, R., Orben, R. A., Orben, Roby, D. D., Irons, D. B., Young, R., Renner, H., Tremblay, Y., Will, A., Harding, A. M. A., and Kitaysky, A. S.: Foraging ecology during nesting influences body size in a pursuit-diving seabird, Mar. Ecol.-Prog. Ser., 533, 261–276, 2015.
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.
Pennycuick, C. J.: Modelling the flying bird, Academic Press, Amsterdam, 2008.
Pianka, E.: Competition and niche theory, in: Theoretical ecology: Principles and applications, edited by: May, R. M., Blackwell Scientific Publications, Oxford, London, 167–196, 1981.
R Development Core Team, R: A language and environment for statistical computing, Vienna: R Foundation for Statistical Computing, 2014.
Renner, H. M., Drummond, B. A., Benson, A.-M., and Paredes, R.: Reproductive success of kittiwakes and murres in sequential stages of the nesting period: Relationship with diet and oceanography, Deep-Sea Res. Pt. II, 109, 251–265, 2014.
Ricklefs, R. E.: Some considerations on the reproductive energetics of pelagic seabirds, Stud. Avian Biol.-Ser., 8, 84–94, 1983.
Schabetsberger, R., Brodeur, R. D., Cianelli, L., Napp, J. M., and Swartzman, G. L.: Diel vertical migration and interaction of zooplankton and juvenile walleye pollock (Theragra chalcogramma) at a frontal region near the Pribilof Islands, Bering Sea, ICES J. Mar. Sci., 57, 1283–1295, 2000.
Sowls, A. L., Hatch, S. A., and Lensink, C. J.: Catalog of Alaskan Seabird Colonies, US Fish and Wildlife Service, Washington, DC, 1978.
Spring, L.: A comparison of functional and morphological adaptations in the common murre (Uria aalge) and thick-billed murre (U. lomvia), Condor, 74, 1–27, 1971.
Squibb, R. C. and Hunt Jr., G. L.: A comparison of nesting-ledges used by seabirds on St. George Island, Ecology, 64, 727–734, 1983.
Takahashi, A., Matsumoto, K., Hunt Jr., G. L., Shultz, M. T., and Watanuki, Y.: Thick-billed murres use different diving behaviors in mixed and stratified waters, Deep-Sea Res. Pt. II, 55, 1837–1845, 2008.
Thaxter, C. B., Wanless, S., Daunt, F., Harris, M. P., Benvenuti, S., Watanuki, Y., Grémillet, D., and Hamer, K. C.: Influence of wing loading on the trade-off between pursuit-diving and flight in common guillemots and razorbills, J. Exp. Biol., 213, 1018–1025, 2010.
Trivelpiece, W. Z., Hinke, J. T., Miller, A. K., Reiss, C. S., Trivelpiece, S. Z., and Watters, G. M.: Variability in krill biomass links harvesting and climate warming to penguin population changes in Antarctica, P. Natl. Acad. Sci. USA, 108, 7625–7628, 2011.
Watanuki, Y., Mehlum, F., and Takakashi, A.: Water temperature sampling by Brunnich's guillemots with bird-borne data loggers, J. Avian Biol., 32, 189–193, 2001.
Watanuki, Y., Niizuma, Y., Gabrielsen, G. W., Sato, K., and Naito, Y.: Stroke and glide of wing-propelled divers: deep diving seabirds adjust surge frequency to buoyancy change with depth, P. R. Soc. Lond. B-Conta., 270, 483–388, 2003.
Watanuki, Y., Wanless, S., Harris, M., Lovvorn, J. R., Miyazaki, M., Tanaka, H., and Sato, K.: Swim speeds and stroke patterns in wing-propelled divers: a comparison among alcids and a penguin, J. Exp. Biol., 209, 1217–1230, 2006.
Wyllie-Echeverria, T. and Wooster, W. S.: Year-to-year variations in Bering Sea ice cover and some consequences for fish distribution, Fish. Oceanogr., 7, 159–170, 1998.
Yamamoto, T., Kokubun, N., Kikuchi, D. M., Sato, N., Takahashi, A., Will, A. P., Kitaysky, A. S., and Watanuki, Y.: Differential responses of seabirds to environmental variability over 2 years in the continental shelf and oceanic habitats of southeastern Bering Sea, Biogeosciences, 13, 2405–2414, https://doi.org/10.5194/bg-13-2405-2016, 2016.
Short summary
Subarctic climate changes may affect the foraging ecology of top predators. We studied the foraging characteristics of two diving seabirds: common (COMUs) and thick-billed murres (TBMUs). COMUs had smaller wing area, partly used deeper depths with more frequent wing strokes, and used higher trophic prey than TBMUs. The smaller wing of COMUs may facilitate swimming agility so that they can capture more mobile prey. These may lead to their different responses to local marine environmental changes.
Subarctic climate changes may affect the foraging ecology of top predators. We studied the...
Special issue
Altmetrics
Final-revised paper
Preprint