Contrasting pelagic ecosystem functioning in eastern and western Baffin Bay revealed by trophic network modeling
Baffin Bay, located at the Arctic Ocean’s ‘doorstep’, is a heterogeneous environment where a warm and salty eastern current flows northwards in the opposite direction of a cold and relatively fresh Arctic current flowing along the west coast of the bay. This circulation affects the physical and biog...
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Online Access: | https://pure.iiasa.ac.at/id/eprint/19374/ https://pure.iiasa.ac.at/id/eprint/19374/1/397-6879-1-pb.pdf https://doi.org/10.1525/elementa.397 |
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ftiiasalaxenburg:oai:pure.iiasa.ac.at:19374 2024-01-21T10:03:40+01:00 Contrasting pelagic ecosystem functioning in eastern and western Baffin Bay revealed by trophic network modeling Saint-Béat, B. Fath, B.D. Aubry, C. Colombet, J. Dinasquet, J. Fortier, L. Galindo, V. Grondin, P.-L. Joux, F. Lalande, C. LeBlanc, M. Raimbault, P. Sime-Ngando, T. Tremblay, J.-E. Vaulot, D. Maps, F. Babin, M. Deming, J.W. Bowman, J. 2020-01 text https://pure.iiasa.ac.at/id/eprint/19374/ https://pure.iiasa.ac.at/id/eprint/19374/1/397-6879-1-pb.pdf https://doi.org/10.1525/elementa.397 en eng https://pure.iiasa.ac.at/id/eprint/19374/1/397-6879-1-pb.pdf Saint-Béat, B., Fath, B.D. <https://pure.iiasa.ac.at/view/iiasa/84.html> orcid:0000-0001-9440-6842 , Aubry, C., Colombet, J., Dinasquet, J., Fortier, L., Galindo, V., Grondin, P.-L., et al. (2020). Contrasting pelagic ecosystem functioning in eastern and western Baffin Bay revealed by trophic network modeling. Elem Sci Anth 8 (1) 10.1525/elementa.397 <https://doi.org/10.1525/elementa.397>. doi:10.1525/elementa.397 cc_by_4 Article PeerReviewed 2020 ftiiasalaxenburg https://doi.org/10.1525/elementa.397 2023-12-25T00:34:57Z Baffin Bay, located at the Arctic Ocean’s ‘doorstep’, is a heterogeneous environment where a warm and salty eastern current flows northwards in the opposite direction of a cold and relatively fresh Arctic current flowing along the west coast of the bay. This circulation affects the physical and biogeochemical environment on both sides of the bay. The phytoplanktonic species composition is driven by its environment and, in turn, shapes carbon transfer through the planktonic food web. This study aims at determining the effects of such contrasting environments on ecosystem structure and functioning and the consequences for the carbon cycle. Ecological indices calculated from food web flow values provide ecosystem properties that are not accessible by direct in situ measurement. From new biological data gathered during the Green Edge project, we built a planktonic food web model for each side of Baffin Bay, considering several biological processes involved in the carbon cycle, notably in the gravitational, lipid, and microbial carbon pumps. Missing flow values were estimated by linear inverse modeling. Calculated ecological network analysis indices revealed significant differences in the functioning of each ecosystem. The eastern Baffin Bay food web presents a more specialized food web that constrains carbon through specific and efficient pathways, leading to segregation of the microbial loop from the classical grazing chain. In contrast, the western food web showed redundant and shorter pathways that caused a higher carbon export, especially via lipid and microbial pumps, and thus promoted carbon sequestration. Moreover, indirect effects resulting from bottom-up and top-down control impacted pairwise relations between species differently and led to the dominance of mutualism in the eastern food web. These differences in pairwise relations affect the dynamics and evolution of each food web and thus might lead to contrasting responses to ongoing climate change. Article in Journal/Newspaper Arctic Baffin Bay Baffin Bay Baffin Climate change IIASA PURE (International Institute of Applied Systems Analysis: PUblications REpository) Arctic Baffin Bay Elem Sci Anth 8 |
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Open Polar |
collection |
IIASA PURE (International Institute of Applied Systems Analysis: PUblications REpository) |
op_collection_id |
ftiiasalaxenburg |
language |
English |
description |
Baffin Bay, located at the Arctic Ocean’s ‘doorstep’, is a heterogeneous environment where a warm and salty eastern current flows northwards in the opposite direction of a cold and relatively fresh Arctic current flowing along the west coast of the bay. This circulation affects the physical and biogeochemical environment on both sides of the bay. The phytoplanktonic species composition is driven by its environment and, in turn, shapes carbon transfer through the planktonic food web. This study aims at determining the effects of such contrasting environments on ecosystem structure and functioning and the consequences for the carbon cycle. Ecological indices calculated from food web flow values provide ecosystem properties that are not accessible by direct in situ measurement. From new biological data gathered during the Green Edge project, we built a planktonic food web model for each side of Baffin Bay, considering several biological processes involved in the carbon cycle, notably in the gravitational, lipid, and microbial carbon pumps. Missing flow values were estimated by linear inverse modeling. Calculated ecological network analysis indices revealed significant differences in the functioning of each ecosystem. The eastern Baffin Bay food web presents a more specialized food web that constrains carbon through specific and efficient pathways, leading to segregation of the microbial loop from the classical grazing chain. In contrast, the western food web showed redundant and shorter pathways that caused a higher carbon export, especially via lipid and microbial pumps, and thus promoted carbon sequestration. Moreover, indirect effects resulting from bottom-up and top-down control impacted pairwise relations between species differently and led to the dominance of mutualism in the eastern food web. These differences in pairwise relations affect the dynamics and evolution of each food web and thus might lead to contrasting responses to ongoing climate change. |
format |
Article in Journal/Newspaper |
author |
Saint-Béat, B. Fath, B.D. Aubry, C. Colombet, J. Dinasquet, J. Fortier, L. Galindo, V. Grondin, P.-L. Joux, F. Lalande, C. LeBlanc, M. Raimbault, P. Sime-Ngando, T. Tremblay, J.-E. Vaulot, D. Maps, F. Babin, M. Deming, J.W. Bowman, J. |
spellingShingle |
Saint-Béat, B. Fath, B.D. Aubry, C. Colombet, J. Dinasquet, J. Fortier, L. Galindo, V. Grondin, P.-L. Joux, F. Lalande, C. LeBlanc, M. Raimbault, P. Sime-Ngando, T. Tremblay, J.-E. Vaulot, D. Maps, F. Babin, M. Deming, J.W. Bowman, J. Contrasting pelagic ecosystem functioning in eastern and western Baffin Bay revealed by trophic network modeling |
author_facet |
Saint-Béat, B. Fath, B.D. Aubry, C. Colombet, J. Dinasquet, J. Fortier, L. Galindo, V. Grondin, P.-L. Joux, F. Lalande, C. LeBlanc, M. Raimbault, P. Sime-Ngando, T. Tremblay, J.-E. Vaulot, D. Maps, F. Babin, M. Deming, J.W. Bowman, J. |
author_sort |
Saint-Béat, B. |
title |
Contrasting pelagic ecosystem functioning in eastern and western Baffin Bay revealed by trophic network modeling |
title_short |
Contrasting pelagic ecosystem functioning in eastern and western Baffin Bay revealed by trophic network modeling |
title_full |
Contrasting pelagic ecosystem functioning in eastern and western Baffin Bay revealed by trophic network modeling |
title_fullStr |
Contrasting pelagic ecosystem functioning in eastern and western Baffin Bay revealed by trophic network modeling |
title_full_unstemmed |
Contrasting pelagic ecosystem functioning in eastern and western Baffin Bay revealed by trophic network modeling |
title_sort |
contrasting pelagic ecosystem functioning in eastern and western baffin bay revealed by trophic network modeling |
publishDate |
2020 |
url |
https://pure.iiasa.ac.at/id/eprint/19374/ https://pure.iiasa.ac.at/id/eprint/19374/1/397-6879-1-pb.pdf https://doi.org/10.1525/elementa.397 |
geographic |
Arctic Baffin Bay |
geographic_facet |
Arctic Baffin Bay |
genre |
Arctic Baffin Bay Baffin Bay Baffin Climate change |
genre_facet |
Arctic Baffin Bay Baffin Bay Baffin Climate change |
op_relation |
https://pure.iiasa.ac.at/id/eprint/19374/1/397-6879-1-pb.pdf Saint-Béat, B., Fath, B.D. <https://pure.iiasa.ac.at/view/iiasa/84.html> orcid:0000-0001-9440-6842 , Aubry, C., Colombet, J., Dinasquet, J., Fortier, L., Galindo, V., Grondin, P.-L., et al. (2020). Contrasting pelagic ecosystem functioning in eastern and western Baffin Bay revealed by trophic network modeling. Elem Sci Anth 8 (1) 10.1525/elementa.397 <https://doi.org/10.1525/elementa.397>. doi:10.1525/elementa.397 |
op_rights |
cc_by_4 |
op_doi |
https://doi.org/10.1525/elementa.397 |
container_title |
Elem Sci Anth |
container_volume |
8 |
_version_ |
1788693981812490240 |