globalchange  > 过去全球变化的重建
DOI: 10.1002/ecs2.2743
WOS ID: WOS:000477912900027
Title:
Modeling composite effects of marine and freshwater processes on migratory species
Author: Friedman, Whitney R.1,2,4; Martin, Benjamin T.2; Wells, Brian K.2; Warzybok, Pete3; Michel, Cyril J.1,2; Danner, Eric M.2; Lindley, Steven T.2
Corresponding Author: Friedman, Whitney R.
Source Publication: ECOSPHERE
ISSN: 2150-8925
Publishing Year: 2019
Volume: 10, Issue:7
Language: 英语
Keyword: anadromous fishes ; California Current ; climate change ; composite effects ; ecological interactions ; ecosystem-based fisheries management ; life-cycle model ; migratory ; salmon
WOS Keyword: SALMON ONCORHYNCHUS-TSHAWYTSCHA ; JUVENILE CHINOOK SALMON ; CALIFORNIA CENTRAL VALLEY ; ENVIRONMENTAL-CONDITIONS ; LIFE-HISTORY ; POPULATION ; CLIMATE ; SURVIVAL ; GROWTH ; SIZE
WOS Category: Ecology
WOS Research Area: Environmental Sciences & Ecology
English Abstract:

Life histories of migratory species such as anadromous fishes make them particularly susceptible to composite effects of processes experienced across distinct habitats and life stages. Therefore, their population dynamics are difficult to quantify and manage without tools such as life-cycle models. As a model species for which life-cycle modeling is particularly useful, we provide an analysis of influential processes affecting dynamics of the Central Valley fall-run Chinook salmon (CVFC) population (Oncorhynchus tshawytscha). This analysis demonstrates how, through identification of covariates that affect this population at each life stage and their relationship to one another, it is possible to identify actions that best promote sustainability for this anadromous species. We developed a life-cycle model for CVFC examining primary processes influencing variability in observed patterns of escapement from 1988 to 2016. CVFC are a valuable fishery along the US West Coast; however, their natural population is a fraction of its historic size, and recent low escapements have resulted in substantial restrictions on the fishery. Our model explains 68.3% of variability in historic escapement values. The most influential processes include temperatures experienced during egg incubation, freshwater flow during juvenile outmigration, and environmentally mediated predation during early marine residence. This work demonstrates the need, and methodology, for considering the interactions between freshwater and marine dynamics when evaluating the efficacy of managerial practices in freshwater and the ocean, especially in the context of increased environmental variability, climate change, and dynamic predator populations. The methodology developed in this study can be used toward improved conservation and management of other anadromous fishes and migratory species.


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Document Type: 期刊论文
Identifier: http://119.78.100.158/handle/2HF3EXSE/141336
Appears in Collections:过去全球变化的重建

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Affiliation: 1.Univ Calif Santa Cruz, Inst Marine Sci, 100 McAllister Way, Santa Cruz, CA 95064 USA
2.Natl Ocean Atmospher Adm, Southwest Fisheries Sci Ctr, Fisheries Ecol Div, 110 McAllister Way, Santa Cruz, CA 95060 USA
3.Point Blue Conservat Sci, Petaluma, CA USA
4.Univ Calif Santa Barbara, Natl Ctr Ecol Anal & Synth, Santa Barbara, CA 93106 USA

Recommended Citation:
Friedman, Whitney R.,Martin, Benjamin T.,Wells, Brian K.,et al. Modeling composite effects of marine and freshwater processes on migratory species[J]. ECOSPHERE,2019-01-01,10(7)
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