Global warming impacts on lake trout in arctic lakes
Arctic freshwater ecosystems may be sensitive indicators of climatic warming trends because they have relatively few species and simple food webs. Many of these systems are dominated by lake trout, which act as keystone predators. For arctic Alaska Toolik Lake, we have a 16‐yr record of physical, ch...
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crwiley:10.4319/lo.1996.41.5.1102 2024-03-24T08:58:55+00:00 Global warming impacts on lake trout in arctic lakes McDonald, Michael E. Hershey, Anne E. Miller, Michael C. 1996 http://dx.doi.org/10.4319/lo.1996.41.5.1102 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.4319%2Flo.1996.41.5.1102 https://aslopubs.onlinelibrary.wiley.com/doi/pdf/10.4319/lo.1996.41.5.1102 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Limnology and Oceanography volume 41, issue 5, page 1102-1108 ISSN 0024-3590 1939-5590 Aquatic Science Oceanography journal-article 1996 crwiley https://doi.org/10.4319/lo.1996.41.5.1102 2024-02-28T02:11:15Z Arctic freshwater ecosystems may be sensitive indicators of climatic warming trends because they have relatively few species and simple food webs. Many of these systems are dominated by lake trout, which act as keystone predators. For arctic Alaska Toolik Lake, we have a 16‐yr record of physical, chemical, and biological data. Our temperature data show a 3°C increase in mean July epilimnetic temperatures. An individual‐based bioenergetics model for young‐of‐year (YOY) lake trout in the lake was used to examine the effects of climate warming on growth of YOY lake trout. Our simulation models predicted that with a July temperature increase, YOY lake trout would need to consume >8‐fold more food (>10‐fold with seasonally increased temperatures) to achieve the same end‐of‐year size as historically surviving YOY lake trout. We have observed no increase in food availability in the lake, and recent analysis shows that primary productivity has actually decreased. If recent changes in the lake foreshadow a long‐term trend, our model results suggest that YOY lake trout will not survive their first winter. Such changes, coupled with other current anthropogenic impacts in the arctic, may disrupt lake trout control of the trophic structure in arctic lakes. Article in Journal/Newspaper Arctic Global warming Alaska Wiley Online Library Arctic Limnology and Oceanography 41 5 1102 1108 |
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Wiley Online Library |
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language |
English |
topic |
Aquatic Science Oceanography |
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Aquatic Science Oceanography McDonald, Michael E. Hershey, Anne E. Miller, Michael C. Global warming impacts on lake trout in arctic lakes |
topic_facet |
Aquatic Science Oceanography |
description |
Arctic freshwater ecosystems may be sensitive indicators of climatic warming trends because they have relatively few species and simple food webs. Many of these systems are dominated by lake trout, which act as keystone predators. For arctic Alaska Toolik Lake, we have a 16‐yr record of physical, chemical, and biological data. Our temperature data show a 3°C increase in mean July epilimnetic temperatures. An individual‐based bioenergetics model for young‐of‐year (YOY) lake trout in the lake was used to examine the effects of climate warming on growth of YOY lake trout. Our simulation models predicted that with a July temperature increase, YOY lake trout would need to consume >8‐fold more food (>10‐fold with seasonally increased temperatures) to achieve the same end‐of‐year size as historically surviving YOY lake trout. We have observed no increase in food availability in the lake, and recent analysis shows that primary productivity has actually decreased. If recent changes in the lake foreshadow a long‐term trend, our model results suggest that YOY lake trout will not survive their first winter. Such changes, coupled with other current anthropogenic impacts in the arctic, may disrupt lake trout control of the trophic structure in arctic lakes. |
format |
Article in Journal/Newspaper |
author |
McDonald, Michael E. Hershey, Anne E. Miller, Michael C. |
author_facet |
McDonald, Michael E. Hershey, Anne E. Miller, Michael C. |
author_sort |
McDonald, Michael E. |
title |
Global warming impacts on lake trout in arctic lakes |
title_short |
Global warming impacts on lake trout in arctic lakes |
title_full |
Global warming impacts on lake trout in arctic lakes |
title_fullStr |
Global warming impacts on lake trout in arctic lakes |
title_full_unstemmed |
Global warming impacts on lake trout in arctic lakes |
title_sort |
global warming impacts on lake trout in arctic lakes |
publisher |
Wiley |
publishDate |
1996 |
url |
http://dx.doi.org/10.4319/lo.1996.41.5.1102 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.4319%2Flo.1996.41.5.1102 https://aslopubs.onlinelibrary.wiley.com/doi/pdf/10.4319/lo.1996.41.5.1102 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Global warming Alaska |
genre_facet |
Arctic Global warming Alaska |
op_source |
Limnology and Oceanography volume 41, issue 5, page 1102-1108 ISSN 0024-3590 1939-5590 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.4319/lo.1996.41.5.1102 |
container_title |
Limnology and Oceanography |
container_volume |
41 |
container_issue |
5 |
container_start_page |
1102 |
op_container_end_page |
1108 |
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1794398605513064448 |