DOI: 10.1111/1365-2656.13090
论文题名: Disentangling the relative influences of global drivers of change in biodiversity: A study of the twentieth-century red fox expansion into the Canadian Arctic
作者: Gallant D. ; Lecomte N. ; Berteaux D.
刊名: Journal of Animal Ecology
ISSN: 218790
出版年: 2020
卷: 89, 期: 2 语种: 英语
英文关键词: anthropocene
; biogeography
; climate change
; distribution
; food subsidies
; fur trade
; human activity
; Vulpes vulpes
Scopus关键词: anthropogenic effect
; biodiversity
; biological invasion
; bottom-up approach
; canid
; climate change
; cooling
; human activity
; population distribution
; range expansion
; research work
; twentieth century
; twenty first century
; warming
; winter
; Baffin Island
; Canada
; Canadian Arctic
; Nunavut
; Alopex lagopus
; Mammalia
; Vulpes
; Vulpes lagopus
; Vulpes vulpes
; Arctic
; article
; biodiversity
; biogeography
; biome
; chronology
; climate change
; cooling
; driver
; ecology
; Hudson Bay
; human
; information center
; major clinical study
; nonhuman
; predator
; productivity
; summer
; temperature stress
; tundra
; velocity
; Vulpes vulpes
; warming
; winter
英文摘要: The poleward range shift of the red fox (Vulpes vulpes) > 1,700 km into the Arctic is one of the most remarkable distribution changes of the early twentieth century. While this expansion threatens a smaller arctic ecological equivalent, the arctic fox (Vulpes lagopus), the case became a textbook example of climate-driven range shifts. We tested this classical climate change hypothesis linked to an important range shift which has attracted little research thus far. We analysed Canadian fur harvest data from the Hudson's Bay Company Archives (14 trading posts; 1926–1950), testing hypotheses based on changes in summer and winter climates. Summer warming might have triggered a bottom-up increase in ecosystem productivity, while winter warming might have lowered thermal stress, both favouring red fox expansion. Additionally, we evaluated the hypothesis that red fox expansion was driven by the appearance of human sedentary sites (n = 110) likely bringing food subsidies into the unproductive tundra. Analysis of red fox expansion chronologies showed that expansion speed was higher during warmer winters. However, the expansions occurred under both cooling and warming trends, being faster during cooler summers in the Baffin Island region. The increasing proportion of red fox in fox fur harvests was best explained by human activity, while generalized linear mixed models also revealed a marginal effect of warmer winters. Generalized additive models confirmed human presence as the most important factor explaining rates of change in the proportion of red fox in fox fur harvests. Using historical ecology, we disentangled the relative influences of climate change and anthropogenic habitat change, two global drivers that transformed arctic biodiversity during the last century and will likely continue to do so during this century. Anthropogenic food subsidies, which constitute stable food sources, facilitated the invasion of the tundra biome by a new mammalian predator and competitor, with long-term consequences that still remain to be understood. © 2019 The Authors. Journal of Animal Ecology © 2019 British Ecological Society Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/159406
Appears in Collections: 气候变化与战略
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作者单位: Chaire de recherche du Canada en biodiversité nordique and Centre d'Études Nordiques, Université du Québec à Rimouski, Rimouski, QC, Canada; Chaire de recherche du Canada en écologie polaire et boréale and Centre d'Études Nordiques, Université de Moncton, Moncton, NB, Canada; Kouchibouguac National Park of Canada, Kouchibouguac, NB, Canada
Recommended Citation:
Gallant D.,Lecomte N.,Berteaux D.. Disentangling the relative influences of global drivers of change in biodiversity: A study of the twentieth-century red fox expansion into the Canadian Arctic[J]. Journal of Animal Ecology,2020-01-01,89(2)