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 species on the trophic ecology of a high trophic-level predator assemblag...
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ftdoajarticles:oai:doaj.org/article:e080dc470b96405b9d8cfb1ad89e39d8 2023-05-15T14:54:18+02:00 A temporal shift in trophic diversity among a predator assemblage in a warming Arctic David J. Yurkowski Nigel E. Hussey Steven H. Ferguson Aaron T. Fisk 2018-01-01T00:00:00Z https://doi.org/10.1098/rsos.180259 https://doaj.org/article/e080dc470b96405b9d8cfb1ad89e39d8 EN eng The Royal Society https://royalsocietypublishing.org/doi/pdf/10.1098/rsos.180259 https://doaj.org/toc/2054-5703 2054-5703 doi:10.1098/rsos.180259 https://doaj.org/article/e080dc470b96405b9d8cfb1ad89e39d8 Royal Society Open Science, Vol 5, Iss 10 (2018) climate change community-wide metrics fishes food web structure marine mammals stable isotopes Science Q article 2018 ftdoajarticles https://doi.org/10.1098/rsos.180259 2022-12-31T12:51:21Z 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 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 (δ13C and δ15N) 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 Directory of Open Access Journals: DOAJ Articles Arctic Canada Cumberland Sound ENVELOPE(-66.014,-66.014,65.334,65.334) Greenland Nunavut Royal Society Open Science 5 10 180259 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
climate change community-wide metrics fishes food web structure marine mammals stable isotopes Science Q |
spellingShingle |
climate change community-wide metrics fishes food web structure marine mammals stable isotopes Science Q David J. Yurkowski Nigel E. Hussey Steven H. Ferguson Aaron T. Fisk A temporal shift in trophic diversity among a predator assemblage in a warming Arctic |
topic_facet |
climate change community-wide metrics fishes food web structure marine mammals stable isotopes Science Q |
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 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 (δ13C and δ15N) 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 |
David J. Yurkowski Nigel E. Hussey Steven H. Ferguson Aaron T. Fisk |
author_facet |
David J. Yurkowski Nigel E. Hussey Steven H. Ferguson Aaron T. Fisk |
author_sort |
David J. Yurkowski |
title |
A temporal shift in trophic diversity among a predator assemblage in a warming Arctic |
title_short |
A temporal shift in trophic diversity among a predator assemblage in a warming Arctic |
title_full |
A temporal shift in trophic diversity among a predator assemblage in a warming Arctic |
title_fullStr |
A temporal shift in trophic diversity among a predator assemblage in a warming Arctic |
title_full_unstemmed |
A temporal shift in trophic diversity among a predator assemblage in a warming Arctic |
title_sort |
temporal shift in trophic diversity among a predator assemblage in a warming arctic |
publisher |
The Royal Society |
publishDate |
2018 |
url |
https://doi.org/10.1098/rsos.180259 https://doaj.org/article/e080dc470b96405b9d8cfb1ad89e39d8 |
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_source |
Royal Society Open Science, Vol 5, Iss 10 (2018) |
op_relation |
https://royalsocietypublishing.org/doi/pdf/10.1098/rsos.180259 https://doaj.org/toc/2054-5703 2054-5703 doi:10.1098/rsos.180259 https://doaj.org/article/e080dc470b96405b9d8cfb1ad89e39d8 |
op_doi |
https://doi.org/10.1098/rsos.180259 |
container_title |
Royal Society Open Science |
container_volume |
5 |
container_issue |
10 |
container_start_page |
180259 |
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1766326022271139840 |