The Canadian Beaufort Shelf trophic structure: evaluating an ecosystem modelling approach by comparison with observed stable isotopic structure
Climate-driven impacts on marine trophic pathways worldwide are compounded by sea-ice loss at northern latitudes. For the Arctic, current information describing food web linkages is fragmented, and there is a need for tools that can describe overarching trophic structure despite limited species-spec...
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Online Access: | https://hal.science/hal-04203562 https://doi.org/10.1139/AS-2020-0035 |
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ftccsdartic:oai:HAL:hal-04203562v1 2023-10-09T21:47:27+02:00 The Canadian Beaufort Shelf trophic structure: evaluating an ecosystem modelling approach by comparison with observed stable isotopic structure Hoover, Carie Giraldo, Carolina Ehrman, Ashley Suchy, Karyn D. Macphee, Shannon A. Brewster, Jasmine D Reist, Jim D. Power, Michael Swanson, Heidi Loseto, Lisa L. Laboratoire Ressources halieutiques Boulogne sur mer (LRHBL) Halieutique Manche Mer du Nord (HMMN) Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER) 2022-03 https://hal.science/hal-04203562 https://doi.org/10.1139/AS-2020-0035 en eng HAL CCSD NRC Research Press info:eu-repo/semantics/altIdentifier/doi/10.1139/AS-2020-0035 hal-04203562 https://hal.science/hal-04203562 doi:10.1139/AS-2020-0035 ISSN: 2368-7460 Arctic Science https://hal.science/hal-04203562 Arctic Science, 2022, 8 (1), pp.292-312. ⟨10.1139/AS-2020-0035⟩ [SDV]Life Sciences [q-bio] info:eu-repo/semantics/article Journal articles 2022 ftccsdartic https://doi.org/10.1139/AS-2020-0035 2023-09-23T22:53:06Z Climate-driven impacts on marine trophic pathways worldwide are compounded by sea-ice loss at northern latitudes. For the Arctic, current information describing food web linkages is fragmented, and there is a need for tools that can describe overarching trophic structure despite limited species-specific data. Here, we tested the ability of a mass-balanced ecosystem model (Ecopath with Ecosim, EwE) to reconstruct the trophic hierarchy of 31 groups, from primary producers to polar bears, in the Canadian Beaufort Sea continental shelf. Trophic level (TL) estimates from EwE were compared with those derived from two nitrogen stable isotope (SI) modelling approaches (SI linear and scaled) to assess EwE accuracy, using a dataset of 642 δ15N observations across 282 taxa. TLs from EwE were strongly, positively related to those from both SI models (R2 > 0.80). EwE performed well (within 0.2 TL) for groups with relatively well-known diets or for taxa characterized by fewer trophic connections (e.g., primary consumers). Performance was worse (> 0.5 TL) for species groups aggregated at coarse taxonomic levels, those with poorly documented diets, and for anadromous fishes. Comparisons with SI models suggested that the scaled approach can overestimate the TL of top predators if ecosystem-specific information is not considered. Article in Journal/Newspaper Arctic Arctic Beaufort Sea Sea ice Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Arctic Beaufort Shelf ENVELOPE(-142.500,-142.500,70.000,70.000) Arctic Science 8 1 292 312 |
institution |
Open Polar |
collection |
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
op_collection_id |
ftccsdartic |
language |
English |
topic |
[SDV]Life Sciences [q-bio] |
spellingShingle |
[SDV]Life Sciences [q-bio] Hoover, Carie Giraldo, Carolina Ehrman, Ashley Suchy, Karyn D. Macphee, Shannon A. Brewster, Jasmine D Reist, Jim D. Power, Michael Swanson, Heidi Loseto, Lisa L. The Canadian Beaufort Shelf trophic structure: evaluating an ecosystem modelling approach by comparison with observed stable isotopic structure |
topic_facet |
[SDV]Life Sciences [q-bio] |
description |
Climate-driven impacts on marine trophic pathways worldwide are compounded by sea-ice loss at northern latitudes. For the Arctic, current information describing food web linkages is fragmented, and there is a need for tools that can describe overarching trophic structure despite limited species-specific data. Here, we tested the ability of a mass-balanced ecosystem model (Ecopath with Ecosim, EwE) to reconstruct the trophic hierarchy of 31 groups, from primary producers to polar bears, in the Canadian Beaufort Sea continental shelf. Trophic level (TL) estimates from EwE were compared with those derived from two nitrogen stable isotope (SI) modelling approaches (SI linear and scaled) to assess EwE accuracy, using a dataset of 642 δ15N observations across 282 taxa. TLs from EwE were strongly, positively related to those from both SI models (R2 > 0.80). EwE performed well (within 0.2 TL) for groups with relatively well-known diets or for taxa characterized by fewer trophic connections (e.g., primary consumers). Performance was worse (> 0.5 TL) for species groups aggregated at coarse taxonomic levels, those with poorly documented diets, and for anadromous fishes. Comparisons with SI models suggested that the scaled approach can overestimate the TL of top predators if ecosystem-specific information is not considered. |
author2 |
Laboratoire Ressources halieutiques Boulogne sur mer (LRHBL) Halieutique Manche Mer du Nord (HMMN) Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER) |
format |
Article in Journal/Newspaper |
author |
Hoover, Carie Giraldo, Carolina Ehrman, Ashley Suchy, Karyn D. Macphee, Shannon A. Brewster, Jasmine D Reist, Jim D. Power, Michael Swanson, Heidi Loseto, Lisa L. |
author_facet |
Hoover, Carie Giraldo, Carolina Ehrman, Ashley Suchy, Karyn D. Macphee, Shannon A. Brewster, Jasmine D Reist, Jim D. Power, Michael Swanson, Heidi Loseto, Lisa L. |
author_sort |
Hoover, Carie |
title |
The Canadian Beaufort Shelf trophic structure: evaluating an ecosystem modelling approach by comparison with observed stable isotopic structure |
title_short |
The Canadian Beaufort Shelf trophic structure: evaluating an ecosystem modelling approach by comparison with observed stable isotopic structure |
title_full |
The Canadian Beaufort Shelf trophic structure: evaluating an ecosystem modelling approach by comparison with observed stable isotopic structure |
title_fullStr |
The Canadian Beaufort Shelf trophic structure: evaluating an ecosystem modelling approach by comparison with observed stable isotopic structure |
title_full_unstemmed |
The Canadian Beaufort Shelf trophic structure: evaluating an ecosystem modelling approach by comparison with observed stable isotopic structure |
title_sort |
canadian beaufort shelf trophic structure: evaluating an ecosystem modelling approach by comparison with observed stable isotopic structure |
publisher |
HAL CCSD |
publishDate |
2022 |
url |
https://hal.science/hal-04203562 https://doi.org/10.1139/AS-2020-0035 |
long_lat |
ENVELOPE(-142.500,-142.500,70.000,70.000) |
geographic |
Arctic Beaufort Shelf |
geographic_facet |
Arctic Beaufort Shelf |
genre |
Arctic Arctic Beaufort Sea Sea ice |
genre_facet |
Arctic Arctic Beaufort Sea Sea ice |
op_source |
ISSN: 2368-7460 Arctic Science https://hal.science/hal-04203562 Arctic Science, 2022, 8 (1), pp.292-312. ⟨10.1139/AS-2020-0035⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1139/AS-2020-0035 hal-04203562 https://hal.science/hal-04203562 doi:10.1139/AS-2020-0035 |
op_doi |
https://doi.org/10.1139/AS-2020-0035 |
container_title |
Arctic Science |
container_volume |
8 |
container_issue |
1 |
container_start_page |
292 |
op_container_end_page |
312 |
_version_ |
1779310554578419712 |