DOI: 10.1111/gcb.13054
论文题名: The impact of El Niño events on the pelagic food chain in the northern California Current
作者: Fisher J.L. ; Peterson W.T. ; Rykaczewski R.R.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2015
卷: 21, 期: 12 起始页码: 4401
结束页码: 4414
语种: 英语
英文关键词: ENSO
; Climate change
; Copepod
; Eastern Pacific and Central Pacific El Niño
; Food chain
; Northern California Current
; Pacific Decadal Oscillation
; Trophic transfer
; Zooplankton
Scopus关键词: abundance
; climate change
; climate variation
; El Nino
; El Nino-Southern Oscillation
; food chain
; Pacific Decadal Oscillation
; pelagic environment
; temperature anomaly
; zooplankton
; California Current
; Pacific Ocean
; Aves
; Copepoda
; Mammalia
; animal
; biodiversity
; California
; copepod
; El Nino
; food chain
; heat
; Pacific Ocean
; physiology
; season
; zooplankton
; Animals
; Biodiversity
; California
; Copepoda
; El Nino-Southern Oscillation
; Food Chain
; Hot Temperature
; Pacific Ocean
; Seasons
; Zooplankton
英文摘要: The zooplankton of the northern California Current are typically characterized by an abundance of lipid-rich copepods that support rapid growth and survival of ecologically, commercially, and recreationally valued fish, birds, and mammals. Disruption of this food chain and reduced ecosystem productivity are often associated with climatic variability such as El Niño events. We examined the variability in timing, magnitude, and duration of positive temperature anomalies and changes in copepod species composition in the northern California Current in relation to 10 tropical El Niño events. Measurable impacts on mesozooplankton of the northern California Current were observed during seven of 10 of these events. The occurrence of anomalously warm water and the response of the copepod community was rapid (lag of zero to 2 months) following the initiation of canonical Eastern Pacific (EP) events, but delayed (lag of 2-8 months) following 'Modoki' Central Pacific (CP) events. The variable lags in the timing of a physical and biological response led to impacts in the northern California Current peaking in winter during EP events and in the spring during CP events. The magnitude and duration of the temperature and copepod anomalies were strongly and positively related to the magnitude and duration of El Niño events, but were also sensitive to the phase of the lower frequency Pacific Decadal Oscillation. When fisheries managers and biological oceanographers are faced with the prospect of a future El Niño event, prudent management and observation will require consideration of the background oceanographic conditions, the type of event, and both the magnitude and duration of the event when assessing the potential physical and biological impacts on the northern California Current. © 2015 John Wiley & Sons Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/61568
Appears in Collections: 影响、适应和脆弱性
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作者单位: Cooperative Institute for Marine Resources Studies, Hatfield Marine Science Center, Oregon State University, Newport, OR, United States; NOAA-Fisheries, Northwest Fisheries Science Center, Hatfield Marine Science Center, Newport, OR, United States; Department of Biological Sciences and Marine Science Program, University of South Carolina, Columbia, SC, United States
Recommended Citation:
Fisher J.L.,Peterson W.T.,Rykaczewski R.R.. The impact of El Niño events on the pelagic food chain in the northern California Current[J]. Global Change Biology,2015-01-01,21(12)