Supplementary material from "A temporal shift in trophic diversity among a predator assemblage in a warming Arctic"
Climate change is leading to northward shifts in species distributions that is altering interspecific interactions at low- and mid-trophic levels. However, little attention has been focused on the effects of redistributions of such climate-driven species on the trophic ecology of a high trophic-leve...
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ftdatacite:10.6084/m9.figshare.c.4238651 2023-05-15T14:54:15+02:00 Supplementary material from "A temporal shift in trophic diversity among a predator assemblage in a warming Arctic" Yurkowski, David J. Hussey, Nigel E. Ferguson, Steven H. Fisk, Aaron T. 2018 https://dx.doi.org/10.6084/m9.figshare.c.4238651 https://figshare.com/collections/Supplementary_material_from_A_temporal_shift_in_trophic_diversity_among_a_predator_assemblage_in_a_warming_Arctic_/4238651 unknown Figshare https://dx.doi.org/10.1098/rsos.180259 CC BY 4.0 https://creativecommons.org/licenses/by/4.0 CC-BY Environmental Science Ecology FOS Biological sciences Collection article 2018 ftdatacite https://doi.org/10.6084/m9.figshare.c.4238651 https://doi.org/10.1098/rsos.180259 2021-11-05T12:55:41Z Climate change is leading to northward shifts in species distributions that is altering interspecific interactions at low- and mid-trophic levels. However, little attention has been focused on the effects of redistributions of such climate-driven species on the trophic ecology of a high trophic-level predator assemblage. Here, during a 22-year period (1990–2012) of increasing sea temperature (1.0°C) and decreasing sea ice extent (12%) in Cumberland Sound, Nunavut, Canada, we examined the trophic structure of a near-apex predator assemblage before (1990–2002) and after (2005–2012) an increase in the availability of capelin—generally an indicator species in colder marine environments for a warming climate. Stable isotopes (δ 13 C and δ 15 N) were used in a Bayesian framework to assess shifts in diet, niche size and community-wide metrics for beluga whales ( Delphinapterus leucas ), ringed seals ( Pusa hispida ), Greenland halibut ( Reinhardtius hippoglossoides ) and anadromous Arctic char ( Salvelinus alpinus ). After 2005, consumption of forage fish increased for all predator species, suggesting diet flexibility with changing abiotic and biotic conditions. An associated temporal shift from a trophically diverse to a trophically redundant predator assemblage occurred where predators now play similar trophic roles by consuming prey primarily from the pelagic energy pathway. Overall, these long-term ecological changes signify that trophic shifts of a high trophic-level predator assemblage associated with climate change have occurred in the Arctic food web. Article in Journal/Newspaper Arctic Beluga Beluga* Climate change Cumberland Sound Delphinapterus leucas Greenland Nunavut Pusa hispida Salvelinus alpinus Sea ice DataCite Metadata Store (German National Library of Science and Technology) Arctic Canada Cumberland Sound ENVELOPE(-66.014,-66.014,65.334,65.334) Greenland Nunavut |
institution |
Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
unknown |
topic |
Environmental Science Ecology FOS Biological sciences |
spellingShingle |
Environmental Science Ecology FOS Biological sciences Yurkowski, David J. Hussey, Nigel E. Ferguson, Steven H. Fisk, Aaron T. Supplementary material from "A temporal shift in trophic diversity among a predator assemblage in a warming Arctic" |
topic_facet |
Environmental Science Ecology FOS Biological sciences |
description |
Climate change is leading to northward shifts in species distributions that is altering interspecific interactions at low- and mid-trophic levels. However, little attention has been focused on the effects of redistributions of such climate-driven species on the trophic ecology of a high trophic-level predator assemblage. Here, during a 22-year period (1990–2012) of increasing sea temperature (1.0°C) and decreasing sea ice extent (12%) in Cumberland Sound, Nunavut, Canada, we examined the trophic structure of a near-apex predator assemblage before (1990–2002) and after (2005–2012) an increase in the availability of capelin—generally an indicator species in colder marine environments for a warming climate. Stable isotopes (δ 13 C and δ 15 N) were used in a Bayesian framework to assess shifts in diet, niche size and community-wide metrics for beluga whales ( Delphinapterus leucas ), ringed seals ( Pusa hispida ), Greenland halibut ( Reinhardtius hippoglossoides ) and anadromous Arctic char ( Salvelinus alpinus ). After 2005, consumption of forage fish increased for all predator species, suggesting diet flexibility with changing abiotic and biotic conditions. An associated temporal shift from a trophically diverse to a trophically redundant predator assemblage occurred where predators now play similar trophic roles by consuming prey primarily from the pelagic energy pathway. Overall, these long-term ecological changes signify that trophic shifts of a high trophic-level predator assemblage associated with climate change have occurred in the Arctic food web. |
format |
Article in Journal/Newspaper |
author |
Yurkowski, David J. Hussey, Nigel E. Ferguson, Steven H. Fisk, Aaron T. |
author_facet |
Yurkowski, David J. Hussey, Nigel E. Ferguson, Steven H. Fisk, Aaron T. |
author_sort |
Yurkowski, David J. |
title |
Supplementary material from "A temporal shift in trophic diversity among a predator assemblage in a warming Arctic" |
title_short |
Supplementary material from "A temporal shift in trophic diversity among a predator assemblage in a warming Arctic" |
title_full |
Supplementary material from "A temporal shift in trophic diversity among a predator assemblage in a warming Arctic" |
title_fullStr |
Supplementary material from "A temporal shift in trophic diversity among a predator assemblage in a warming Arctic" |
title_full_unstemmed |
Supplementary material from "A temporal shift in trophic diversity among a predator assemblage in a warming Arctic" |
title_sort |
supplementary material from "a temporal shift in trophic diversity among a predator assemblage in a warming arctic" |
publisher |
Figshare |
publishDate |
2018 |
url |
https://dx.doi.org/10.6084/m9.figshare.c.4238651 https://figshare.com/collections/Supplementary_material_from_A_temporal_shift_in_trophic_diversity_among_a_predator_assemblage_in_a_warming_Arctic_/4238651 |
long_lat |
ENVELOPE(-66.014,-66.014,65.334,65.334) |
geographic |
Arctic Canada Cumberland Sound Greenland Nunavut |
geographic_facet |
Arctic Canada Cumberland Sound Greenland Nunavut |
genre |
Arctic Beluga Beluga* Climate change Cumberland Sound Delphinapterus leucas Greenland Nunavut Pusa hispida Salvelinus alpinus Sea ice |
genre_facet |
Arctic Beluga Beluga* Climate change Cumberland Sound Delphinapterus leucas Greenland Nunavut Pusa hispida Salvelinus alpinus Sea ice |
op_relation |
https://dx.doi.org/10.1098/rsos.180259 |
op_rights |
CC BY 4.0 https://creativecommons.org/licenses/by/4.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.6084/m9.figshare.c.4238651 https://doi.org/10.1098/rsos.180259 |
_version_ |
1766325977907986432 |