Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1111/gcb.13776 |
Decadal changes in habitat characteristics influence population trajectories of southern elephant seals | |
Hindell, Mark A.1,2; Sumner, Michael2,3; Bestley, Sophie1,3; Wotherspoon, Simon1,3; Harcourt, Robert G.4; Lea, Mary-Anne1; Alderman, Rachael5; McMahon, Clive R.1,6 | |
2017-12-01 | |
发表期刊 | GLOBAL CHANGE BIOLOGY |
ISSN | 1354-1013 |
EISSN | 1365-2486 |
出版年 | 2017 |
卷号 | 23期号:12 |
文章类型 | Article |
语种 | 英语 |
国家 | Australia |
英文摘要 | Understanding divergent biological responses to climate change is important for predicting ecosystem level consequences. We use species habitat models to predict the winter foraging habitats of female southern elephant seals and investigate how changes in environmental variables within these habitats may be related to observed decreases in the Macquarie Island population. There were three main groups of seals that specialized in different ocean realms (the sub-Antarctic, the Ross Sea and the Victoria Land Coast). The physical and climate attributes (e.g. wind strength, sea surface height, ocean current strength) varied amongst the realms and also displayed different temporal trends over the last two to four decades. Most notably, sea ice extent increased on average in the Victoria Land realm while it decreased overall in the Ross Sea realm. Using a species distribution model relating mean residence times (time spent in each 50 x 50 km grid cell) to 9 climate and physical co-variates, we developed spatial predictions of residence time to identify the core regions used by the seals across the Southern Ocean from 120 degrees E to 120 degrees W. Population size at Macquarie Island was negatively correlated with ice concentration within the core habitat of seals using the Victoria Land Coast and the Ross Sea. Sea ice extent and concentration is predicted to continue to change in the Southern Ocean, having unknown consequences for the biota of the region. The proportion of Macquarie Island females (40%) utilizing the relatively stable sub-Antarctic region, may buffer this population against longer-term regional changes in habitat quality, but the Macquarie Island population has persistently decreased (-1.45% per annum) over seven decades indicating that environmental changes in the Antarctic are acting on the remaining 60% of the population to impose a long-term population decline in a top Southern Ocean predator. |
英文关键词 | bio-telemetry climate change environmental variability integrated marine observing system Macquarie Island population trends species distribution models |
领域 | 气候变化 ; 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000414969000016 |
WOS关键词 | MIROUNGA-LEONINA ; CLIMATE-CHANGE ; KING PENGUINS ; AUSTRAL SUMMER ; TRENDS ; ICE ; VARIABILITY ; TILETAMINE ; MOVEMENTS ; TRACKING |
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/17857 |
专题 | 气候变化 资源环境科学 |
作者单位 | 1.Inst Marine & Antarctic Studies, Hobart, Tas, Australia; 2.Univ Tasmania, Antarctic Climate & Ecosyst CRC, Hobart, Tas, Australia; 3.Australian Antarctic Div, Kingston, Tas, Australia; 4.Macquarie Univ, Fac Sci & Engn, Dept Biol Sci, Sydney, NSW, Australia; 5.Dept Primary Ind Pk Water & Environm, Hobart, Tas, Australia; 6.Sydney Inst Marine Sci, Mosman, Australia |
推荐引用方式 GB/T 7714 | Hindell, Mark A.,Sumner, Michael,Bestley, Sophie,et al. Decadal changes in habitat characteristics influence population trajectories of southern elephant seals[J]. GLOBAL CHANGE BIOLOGY,2017,23(12). |
APA | Hindell, Mark A..,Sumner, Michael.,Bestley, Sophie.,Wotherspoon, Simon.,Harcourt, Robert G..,...&McMahon, Clive R..(2017).Decadal changes in habitat characteristics influence population trajectories of southern elephant seals.GLOBAL CHANGE BIOLOGY,23(12). |
MLA | Hindell, Mark A.,et al."Decadal changes in habitat characteristics influence population trajectories of southern elephant seals".GLOBAL CHANGE BIOLOGY 23.12(2017). |
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