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DOI: 10.1371/journal.pone.0098951
论文题名:
Time-Delayed Subsidies: Interspecies Population Effects in Salmon
作者: Michelle C. Nelson; John D. Reynolds
刊名: PLOS ONE
ISSN: 1932-6203
出版年: 2014
发表日期: 2014-6-9
卷: 9, 期:6
语种: 英语
英文关键词: Spawning ; Salmon ; Invertebrates ; Habitats ; Freshwater fish ; Fresh water ; Ecosystems ; Engineering and technology
英文摘要: Cross-boundary nutrient inputs can enhance and sustain populations of organisms in nutrient-poor recipient ecosystems. For example, Pacific salmon (Oncorhynchus spp.) can deliver large amounts of marine-derived nutrients to freshwater ecosystems through their eggs, excretion, or carcasses. This has led to the question of whether nutrients from one generation of salmon can benefit juvenile salmon from subsequent generations. In a study of 12 streams on the central coast of British Columbia, we found that the abundance of juvenile coho salmon was most closely correlated with the abundance of adult pink salmon from previous years. There was a secondary role for adult chum salmon and watershed size, followed by other physical characteristics of streams. Most of the coho sampled emerged in the spring, and had little to no direct contact with spawning salmon nutrients at the time of sampling in the summer and fall. A combination of techniques suggest that subsidies from spawning salmon can have a strong, positive, time-delayed influence on the productivity of salmon-bearing streams through indirect effects from previous spawning events. This is the first study on the impacts of nutrients from naturally-occurring spawning salmon on juvenile population abundance of other salmon species.
URL: http://journals.plos.org/plosone/article/file?id=10.1371/journal.pone.0098951&type=printable
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/19859
Appears in Collections:过去全球变化的重建
影响、适应和脆弱性
科学计划与规划
气候变化与战略
全球变化的国际研究计划
气候减缓与适应
气候变化事实与影响

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作者单位: Earth to Ocean Research Group, Department of Biological Sciences, Simon Fraser University, Burnaby, BC, Canada;Raincoast Conservation Foundation, Sidney, BC, Canada;Earth to Ocean Research Group, Department of Biological Sciences, Simon Fraser University, Burnaby, BC, Canada

Recommended Citation:
Michelle C. Nelson,John D. Reynolds. Time-Delayed Subsidies: Interspecies Population Effects in Salmon[J]. PLOS ONE,2014-01-01,9(6)
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