DOI: 10.1111/gcb.12829
论文题名: Temporal patterns in adult salmon migration timing across southeast Alaska
作者: Kovach R.P. ; Ellison S.C. ; Pyare S. ; Tallmon D.A.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2015
卷: 21, 期: 5 起始页码: 1821
结束页码: 1833
语种: 英语
英文关键词: Climate change
; Heterogeneity
; Migration timing
; Phenology
; Phenotypic variation
; Salmon
; Synchrony
; Temperature
Scopus关键词: climate change
; heterogeneity
; long-term change
; migration
; phenology
; salmonid
; synchrony
; temporal variation
; Alaska
; United States
; Oncorhynchus
; animal
; biological model
; climate change
; ecosystem
; physiology
; population migration
; salmonine
; species difference
; time
; United States
; Alaska
; Animal Migration
; Animals
; Climate Change
; Ecosystem
; Models, Biological
; Salmon
; Species Specificity
; Time Factors
英文摘要: Pacific salmon migration timing can drive population productivity, ecosystem dynamics, and human harvest. Nevertheless, little is known about long-term variation in salmon migration timing for multiple species across broad regions. We used long-term data for five Pacific salmon species throughout rapidly warming southeast Alaska to describe long-term changes in salmon migration timing, interannual phenological synchrony, relationships between climatic variation and migratory timing, and to test whether long-term changes in migration timing are related to glaciation in headwater streams. Temporal changes in the median date of salmon migration timing varied widely across species. Most sockeye populations are migrating later over time (11 of 14), but pink, chum, and especially coho populations are migrating earlier than they did historically (16 of 19 combined). Temporal trends in duration and interannual variation in migration timing were highly variable across species and populations. The greatest temporal shifts in the median date of migration timing were correlated with decreases in the duration of migration timing, suggestive of a loss of phenotypic variation due to natural selection. Pairwise interannual correlations in migration timing varied widely but were generally positive, providing evidence for weak region-wide phenological synchrony. This synchrony is likely a function of climatic variation, as interannual variation in migration timing was related to climatic phenomenon operating at large- (Pacific decadal oscillation), moderate- (sea surface temperature), and local-scales (precipitation). Surprisingly, the presence or the absence of glaciers within a watershed was unrelated to long-term shifts in phenology. Overall, there was extensive heterogeneity in long-term patterns of migration timing throughout this climatically and geographically complex region, highlighting that future climatic change will likely have widely divergent impacts on salmon migration timing. Although salmon phenological diversity will complicate future predictions of migration timing, this variation likely acts as a major contributor to population and ecosystem resiliency in southeast Alaska. © 2014 John Wiley & Sons Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/61606
Appears in Collections: 影响、适应和脆弱性
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作者单位: U.S. Geological Survey, Northern Rocky Mountain Science Center, Glacier Field Station, West Glacier, MT, United States; Biology and Marine Biology Program, University of Alaska Southeast, Juneau, AK, United States; University of Alaska Southeast, Juneau, AK, United States
Recommended Citation:
Kovach R.P.,Ellison S.C.,Pyare S.,et al. Temporal patterns in adult salmon migration timing across southeast Alaska[J]. Global Change Biology,2015-01-01,21(5)