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DOI: 10.1371/journal.pone.0102491
论文题名:
Estimation of Density-Dependent Mortality of Juvenile Bivalves in the Wadden Sea
作者: Henrike Andresen; Matthias Strasser; Jaap van der Meer
刊名: PLOS ONE
ISSN: 1932-6203
出版年: 2014
发表日期: 2014-8-8
卷: 9, 期:8
语种: 英语
英文关键词: Bivalves ; Death rates ; Predation ; Confidence intervals ; Population dynamics ; Population density ; Marine biology ; Stochastic processes
英文摘要: We investigated density-dependent mortality within the early months of life of the bivalves Macoma balthica (Baltic tellin) and Cerastoderma edule (common cockle) in the Wadden Sea. Mortality is thought to be density-dependent in juvenile bivalves, because there is no proportional relationship between the size of the reproductive adult stocks and the numbers of recruits for both species. It is not known however, when exactly density dependence in the pre-recruitment phase occurs and how prevalent it is. The magnitude of recruitment determines year class strength in bivalves. Thus, understanding pre-recruit mortality will improve the understanding of population dynamics. We analyzed count data from three years of temporal sampling during the first months after bivalve settlement at ten transects in the Sylt-Rømø-Bay in the northern German Wadden Sea. Analyses of density dependence are sensitive to bias through measurement error. Measurement error was estimated by bootstrapping, and residual deviances were adjusted by adding process error. With simulations the effect of these two types of error on the estimate of the density-dependent mortality coefficient was investigated. In three out of eight time intervals density dependence was detected for M. balthica, and in zero out of six time intervals for C. edule. Biological or environmental stochastic processes dominated over density dependence at the investigated scale.
URL: http://journals.plos.org/plosone/article/file?id=10.1371/journal.pone.0102491&type=printable
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/19824
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: Department of Marine Ecology, Royal Netherlands Institute for Sea Research, Den Burg, The Netherlands;Division Coastal Ecology, Alfred Wegener Institute - Wadden Sea Station Sylt, List, Germany;Department of Marine Ecology, Royal Netherlands Institute for Sea Research, Den Burg, The Netherlands;Department of Theoretical Biology, Vrije Universiteit, Amsterdam, The Netherlands

Recommended Citation:
Henrike Andresen,Matthias Strasser,Jaap van der Meer. Estimation of Density-Dependent Mortality of Juvenile Bivalves in the Wadden Sea[J]. PLOS ONE,2014-01-01,9(8)
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