DOI: 10.1111/gcb.13171
论文题名: Humpback whale diets respond to variance in ocean climate and ecosystem conditions in the California Current
作者: Fleming A.H. ; Clark C.T. ; Calambokidis J. ; Barlow J.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2016
卷: 22, 期: 3 起始页码: 1214
结束页码: 1224
语种: 英语
英文关键词: Cetacean foraging
; Climate change
; Ecosystem shifts
; Euphausiids
; Forage fish
; North Pacific Gyre Oscillation
; Pacific Decadal Oscillation
; Upwelling
Scopus关键词: Cetacea
; Engraulidae
; Euphausiacea
; Euphausiidae
; Megaptera
; animal
; California
; climate change
; diet
; ecosystem
; female
; food chain
; humpback whale
; male
; Pacific Ocean
; physiology
; sea
; season
; temperature
; Animals
; California
; Climate Change
; Diet
; Ecosystem
; Female
; Food Chain
; Humpback Whale
; Male
; Oceans and Seas
; Pacific Ocean
; Seasons
; Temperature
英文摘要: Large, migratory predators are often cited as sentinel species for ecosystem processes and climate-related changes, but their utility as indicators is dependent upon an understanding of their response to environmental variability. Documentation of the links between climate variability, ecosystem change and predator dynamics is absent for most top predators. Identifying species that may be useful indicators and elucidating these mechanistic links provides insight into current ecological dynamics and may inform predictions of future ecosystem responses to climatic change. We examine humpback whale response to environmental variability through stable isotope analysis of diet over a dynamic 20-year period (1993-2012) in the California Current System (CCS). Humpback whale diets captured two major shifts in oceanographic and ecological conditions in the CCS. Isotopic signatures reflect a diet dominated by krill during periods characterized by positive phases of the North Pacific Gyre Oscillation (NPGO), cool sea surface temperature (SST), strong upwelling and high krill biomass. In contrast, humpback whale diets are dominated by schooling fish when the NPGO is negative, SST is warmer, seasonal upwelling is delayed and anchovy and sardine populations display increased biomass and range expansion. These findings demonstrate that humpback whales trophically respond to ecosystem shifts, and as a result, their foraging behavior is a synoptic indicator of oceanographic and ecological conditions across the CCS. Multi-decadal examination of these sentinel species thus provides insight into biological consequences of interannual climate fluctuations, fundamental to advancing ecosystem predictions related to global climate change. © 2016 John Wiley & Sons Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/61456
Appears in Collections: 影响、适应和脆弱性
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作者单位: Center for Marine Biodiversity and Conservation, Scripps Institution of Oceanography, La Jolla, CA, United States; NOAA, National Marine Fisheries Service, Southwest Fisheries Science Center, La Jolla, CA, United States; School of Fisheries and Ocean Sciences, University of Alaska Fairbanks, PO Box 757220, Fairbanks, AK, United States; Cascadia Research Collective, Olympia, WA, United States
Recommended Citation:
Fleming A.H.,Clark C.T.,Calambokidis J.,et al. Humpback whale diets respond to variance in ocean climate and ecosystem conditions in the California Current[J]. Global Change Biology,2016-01-01,22(3)