Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1073/pnas.1702584114 |
Behavioral responses to annual temperature variation alter the dominant energy pathway, growth, and condition of a cold-water predator | |
Guzzo, Matthew M.1; Blanchfield, Paul J.1,2; Rennie, Michael D.1,3,4 | |
2017-09-12 | |
发表期刊 | PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA |
ISSN | 0027-8424 |
出版年 | 2017 |
卷号 | 114期号:37页码:9912-9917 |
文章类型 | Article |
语种 | 英语 |
国家 | Canada |
英文摘要 | There is a pressing need to understand how ecosystems will respond to climate change. To date, no long-term empirical studies have confirmed that fish populations exhibit adaptive foraging behavior in response to temperature variation and the potential implications this has on fitness. Here, we use an unparalleled 11-y acoustic telemetry, stable isotope, and mark-recapture dataset to test if a population of lake trout (Salvelinus namaycush), a cold-water stenotherm, adjusted its use of habitat and energy sources in response to annual variations in lake temperatures during the open-water season and how these changes translated to the growth and condition of individual fish. We found that climate influenced access to littoral regions in spring (data from telemetry), which in turn influenced energy acquisition (data from isotopes), and growth (mark-recapture data). In more stressful years, those with shorter springs and longer summers, lake trout had reduced access to littoral habitat and assimilated less littoral energy, resulting in reduced growth and condition. Annual variation in prey abundance influenced lake trout foraging tactics (i.e., the balance of the number and duration of forays) but not the overall time spent in littoral regions. Lake trout greatly reduced their use of littoral habitat and occupied deep pelagic waters during the summer. Together, our results provide clear evidence that climate-mediated behavior can influence the dominant energy pathways of top predators, with implications ranging from individual fitness to food web stability. |
英文关键词 | food web climate change habitat coupling lake trout north-temperate lake |
领域 | 地球科学 ; 气候变化 ; 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000410293400056 |
WOS关键词 | TROUT SALVELINUS-NAMAYCUSH ; EXPERIMENTAL LAKES AREA ; CANADIAN SHIELD LAKES ; PELAGIC FOOD WEBS ; CLIMATE-CHANGE ; DISSOLVED-OXYGEN ; FISH POPULATIONS ; HABITAT USE ; BIOENERGETICS ; STABILITY |
WOS类目 | Multidisciplinary Sciences |
WOS研究方向 | Science & Technology - Other Topics |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/204779 |
专题 | 地球科学 资源环境科学 气候变化 |
作者单位 | 1.Univ Manitoba, Dept Biol Sci, Winnipeg, MB R3T 2N2, Canada; 2.Fisheries & Oceans Canada, Freshwater Inst, Winnipeg, MB R3T 2N6, Canada; 3.Lakehead Univ, Dept Biol, Thunder Bay, ON P7B 5E1, Canada; 4.IISD Expt Lakes Area Inc, Winnipeg, MB R3B 0T4, Canada |
推荐引用方式 GB/T 7714 | Guzzo, Matthew M.,Blanchfield, Paul J.,Rennie, Michael D.. Behavioral responses to annual temperature variation alter the dominant energy pathway, growth, and condition of a cold-water predator[J]. PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,2017,114(37):9912-9917. |
APA | Guzzo, Matthew M.,Blanchfield, Paul J.,&Rennie, Michael D..(2017).Behavioral responses to annual temperature variation alter the dominant energy pathway, growth, and condition of a cold-water predator.PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,114(37),9912-9917. |
MLA | Guzzo, Matthew M.,et al."Behavioral responses to annual temperature variation alter the dominant energy pathway, growth, and condition of a cold-water predator".PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA 114.37(2017):9912-9917. |
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