DOI: 10.1111/gcb.14332
Scopus记录号: 2-s2.0-85053864242
论文题名: Tundra be dammed: Beaver colonization of the Arctic
作者: Tape K.D. ; Jones B.M. ; Arp C.D. ; Nitze I. ; Grosse G.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2018
卷: 24, 期: 10 起始页码: 4478
结束页码: 4488
语种: 英语
英文关键词: arctic tundra
; beaver
; climate change
; permafrost
; population recovery
; salmon
; shrub expansion
; stream
Scopus关键词: Castor canadensis
; Castoridae
英文摘要: Increasing air temperatures are changing the arctic tundra biome. Permafrost is thawing, snow duration is decreasing, shrub vegetation is proliferating, and boreal wildlife is encroaching. Here we present evidence of the recent range expansion of North American beaver (Castor canadensis) into the Arctic, and consider how this ecosystem engineer might reshape the landscape, biodiversity, and ecosystem processes. We developed a remote sensing approach that maps formation and disappearance of ponds associated with beaver activity. Since 1999, 56 new beaver pond complexes were identified, indicating that beavers are colonizing a predominantly tundra region (18,293 km2) of northwest Alaska. It is unclear how improved tundra stream habitat, population rebound following overtrapping for furs, or other factors are contributing to beaver range expansion. We discuss rates and likely routes of tundra beaver colonization, as well as effects on permafrost, stream ice regimes, and freshwater and riparian habitat. Beaver ponds and associated hydrologic changes are thawing permafrost. Pond formation increases winter water temperatures in the pond and downstream, likely creating new and more varied aquatic habitat, but specific biological implications are unknown. Beavers create dynamic wetlands and are agents of disturbance that may enhance ecosystem responses to warming in the Arctic. © 2018 John Wiley & Sons Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/110234
Appears in Collections: 影响、适应和脆弱性 气候变化事实与影响
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作者单位: Water and Environmental Research Center, University of Alaska, Fairbanks, AK, United States; U.S. Geological Survey, Alaska Science Center, Anchorage, AK, United States; Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Potsdam, Germany; Institute of Earth and Environmental Science, University of Potsdam, Potsdam, Germany
Recommended Citation:
Tape K.D.,Jones B.M.,Arp C.D.,et al. Tundra be dammed: Beaver colonization of the Arctic[J]. Global Change Biology,2018-01-01,24(10)