globalchange  > 气候变化事实与影响
DOI: 10.1002/ecs2.2672
WOS记录号: WOS:000472716600017
论文题名:
Reindeer turning maritime: Ice-locked tundra triggers changes in dietary niche utilization
作者: Hansen, Brage Bremset1; Lorentzen, Jon Runar1,2; Welker, Jeffrey M.3,4,5; Varpe, Oystein2,6; Aanes, Ronny1,7; Beumer, Larissa Teresa2,8; Pedersen, Ashild Onvik7
通讯作者: Hansen, Brage Bremset
刊名: ECOSPHERE
ISSN: 2150-8925
出版年: 2019
卷: 10, 期:4
语种: 英语
英文关键词: adaptation ; Arctic ; behavior ; caribou ; diet ; ground-ice ; herbivore ; meta-ecosystem ; niche ; rain-on-snow ; Rangifer tarandus platyrhynchus ; ungulate
WOS关键词: CLIMATE-CHANGE ; NORTH RONALDSAY ; MARINE ; EVOLUTIONARY ; DYNAMICS ; SEAWEED ; EVENTS ; SHEEP ; POPULATION ; RESPONSES
WOS学科分类: Ecology
WOS研究方向: Environmental Sciences & Ecology
英文摘要:

The rapid warming of the Arctic may not only alter species' abundances and distributions, but likely also the trophic interactions within and between ecosystems. On the high-arctic tundra, extreme warm spells and associated rain-on-snow events in winter can encapsulate the vegetation entirely in ground-ice (i.e., basal ice) and directly or indirectly affect plants, herbivores, and carnivores. However, the implications of such extreme events for trophic interactions and food-web ecology are generally far from understood. Here, we show that wild Svalbard reindeer populations increasingly isolated by lack of sea-ice respond to rain-on-snow and ice-locked pastures by increased kelp consumption. Based on annual population surveys in late winters 2006-2015, the proportion of individual reindeer feeding along the shoreline increased the icier the winter. Stable isotope values (delta S-34, delta C-13, delta N-15) of plants, washed-ashore kelp, and fresh reindeer feces collected along coast-inland gradients, confirmed ingestion of marine biomass by the reindeer in the shoreline habitat. Thus, even on remote islands and peninsulas increasingly isolated by sea-ice loss, effects of climate change may be buffered in part by behavioral plasticity and increased use of resource subsidies. This marine dimension of a terrestrial herbivore's realized foraging niche adds to evidence that global warming significantly alters trophic interactions as well as meta-ecosystem processes.


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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/133030
Appears in Collections:气候变化事实与影响

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作者单位: 1.Norwegian Univ Sci & Technol, Ctr Biodivers Dynam, Dept Biol, N-7491 Trondheim, Norway
2.Univ Ctr Svalbard, Dept Arctic Biol, N-9171 Longyearbyen, Norway
3.UArctic, Oulu 90014, Finland
4.Univ Oulo, Oulu 90014, Finland
5.Univ Alaska Anchorage, Anchorage, AK 99516 USA
6.Akvaplan Niva Fram Ctr, N-9296 Tromso, Norway
7.Norwegian Polar Res Inst, Fram Ctr, N-9296 Tromso, Norway
8.Aarhus Univ, Dept Biosci, Frederiksborgvej 399, DK-4000 Roskilde, Denmark

Recommended Citation:
Hansen, Brage Bremset,Lorentzen, Jon Runar,Welker, Jeffrey M.,et al. Reindeer turning maritime: Ice-locked tundra triggers changes in dietary niche utilization[J]. ECOSPHERE,2019-01-01,10(4)
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