Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1111/gcb.13933 |
Spring fasting behavior in a marine apex predator provides an index of ecosystem productivity | |
Rode, Karyn D.1; Wilson, Ryan R.2; Douglas, David C.3; Muhlenbruch, Vanessa1; Atwood, Todd C.1; Regehr, Eric V.2,9; Richardson, Evan S.4; Pilfold, Nicholas W.5; Derocher, Andrew E.6; Durner, George M.1; Stirling, Ian4,6; Amstrup, Steven C.7,8; St Martin, Michelle2; Pagano, Anthony M.1; Simac, Kristin1 | |
2018 | |
发表期刊 | GLOBAL CHANGE BIOLOGY |
ISSN | 1354-1013 |
EISSN | 1365-2486 |
出版年 | 2018 |
卷号 | 24期号:1页码:410-423 |
文章类型 | Article |
语种 | 英语 |
国家 | USA; Canada |
英文摘要 | The effects of declining Arctic sea ice on local ecosystem productivity are not well understood but have been shown to vary inter-specifically, spatially, and temporally. Because marine mammals occupy upper trophic levels in Arctic food webs, they may be useful indicators for understanding variation in ecosystem productivity. Polar bears (Ursus maritimus) are apex predators that primarily consume benthic and pelagic-feeding ice-associated seals. As such, their productivity integrates sea ice conditions and the ecosystem supporting them. Declining sea ice availability has been linked to negative population effects for polar bears but does not fully explain observed population changes. We examined relationships between spring foraging success of polar bears and sea ice conditions, prey productivity, and general patterns of ecosystem productivity in the Beaufort and Chukchi Seas (CSs). Fasting status (>= 7 days) was estimated using serum urea and creatinine levels of 1,448 samples collected from 1,177 adult and subadult bears across three subpopulations. Fasting increased in the Beaufort Sea between 1983-1999 and 2000-2016 and was related to an index of ringed seal body condition. This change was concurrent with declines in body condition of polar bears and observed changes in the diet, condition and/or reproduction of four other vertebrate consumers within the food chain. In contrast, fasting declined in CS polar bears between periods and was less common than in the two Beaufort Sea subpopulations consistent with studies demonstrating higher primary productivity and maintenance or improved body condition in polar bears, ringed seals, and bearded seals despite recent sea ice loss in this region. Consistency between regional and temporal variation in spring polar bear fasting and food web productivity suggests that polar bears may be a useful indicator species. Furthermore, our results suggest that spatial and temporal ecological variation is important in affecting upper trophic-level productivity in these marine ecosystems. |
英文关键词 | Beaufort Sea Chukchi Sea creatinine feeding predation ringed seals sea ice urea |
领域 | 气候变化 ; 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000426506100062 |
WOS关键词 | SOUTHERN BEAUFORT SEA ; POLAR BEARS ; RINGED SEALS ; URSUS-MARITIMUS ; POPULATION STATUS ; SERUM CREATININE ; CLIMATE-CHANGE ; ICE CONDITIONS ; PHOCA-HISPIDA ; HABITAT LOSS |
WOS类目 | Biodiversity Conservation ; Ecology ; Environmental Sciences |
WOS研究方向 | Biodiversity & Conservation ; Environmental Sciences & Ecology |
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/16581 |
专题 | 气候变化 资源环境科学 |
作者单位 | 1.US Geol Survey, Alaska Sci Ctr, Anchorage, AK 99508 USA; 2.US Fish & Wildlife Serv, Marine Mammals Management, Anchorage, AK USA; 3.US Geol Survey, Alaska Sci Ctr, Juneau, AK USA; 4.Environm Canada, Wildlife Res Div, Sci & Technol Branch, Edmonton, AB, Canada; 5.San Diego Zoo Global, Inst Conservat Res, Escondido, CA USA; 6.Univ Alberta, Dept Biol Sci, Edmonton, AB, Canada; 7.Polar Bears Int, Bozeman, MT USA; 8.Univ Wyoming, Dept Zool & Physiol, Laramie, WY USA; 9.Univ Washington, Polar Sci Ctr, Seattle, WA 98195 USA |
推荐引用方式 GB/T 7714 | Rode, Karyn D.,Wilson, Ryan R.,Douglas, David C.,et al. Spring fasting behavior in a marine apex predator provides an index of ecosystem productivity[J]. GLOBAL CHANGE BIOLOGY,2018,24(1):410-423. |
APA | Rode, Karyn D..,Wilson, Ryan R..,Douglas, David C..,Muhlenbruch, Vanessa.,Atwood, Todd C..,...&Simac, Kristin.(2018).Spring fasting behavior in a marine apex predator provides an index of ecosystem productivity.GLOBAL CHANGE BIOLOGY,24(1),410-423. |
MLA | Rode, Karyn D.,et al."Spring fasting behavior in a marine apex predator provides an index of ecosystem productivity".GLOBAL CHANGE BIOLOGY 24.1(2018):410-423. |
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