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DOI	10.1111/ele.12385
	Measures of precision for dissimilarity-based multivariate analysis of ecological communities
	Anderson M.J.; Santana-Garcon J.
发表日期	2015
ISSN	1461-023X
EISSN	1461-0248
卷号	18 期号:1
英文摘要	Ecological studies require key decisions regarding the appropriate size and number of sampling units. No methods currently exist to measure precision for multivariate assemblage data when dissimilarity-based analyses are intended to follow. Here, we propose a pseudo multivariate dissimilarity-based standard error (MultSE) as a useful quantity for assessing sample-size adequacy in studies of ecological communities. Based on sums of squared dissimilarities, MultSE measures variability in the position of the centroid in the space of a chosen dissimilarity measure under repeated sampling for a given sample size. We describe a novel double resampling method to quantify uncertainty in MultSE values with increasing sample size. For more complex designs, values of MultSE can be calculated from the pseudo residual mean square of a permanova model, with the double resampling done within appropriate cells in the design. R code functions for implementing these techniques, along with ecological examples, are provided. © 2014 The Authors. Ecology Letters published by John Wiley & Sons Ltd and CNRS.
英文关键词	Assemblage data; Community ecology; Dissimilarities; Multivariate analysis; permanova; Precision; Replicates; Sampling design; Standard error; Variability
学科领域	biota; ecology; methodology; multivariate analysis; procedures; theoretical model; Biota; Ecology; Models, Theoretical; Multivariate Analysis; Research Design
语种	英语
scopus关键词	biota; ecology; methodology; multivariate analysis; procedures; theoretical model; Biota; Ecology; Models, Theoretical; Multivariate Analysis; Research Design
来源期刊	Ecology Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/118700
作者单位	New Zealand Institute for Advanced Study (NZIAS), Massey University, Albany Campus, Private Bag 102 904, Auckland, 0745, New Zealand; The UWA Oceans Institute (M470) and School of Plant Biology, The University of Western Australia, Perth, Australia
推荐引用方式 GB/T 7714	Anderson M.J.,Santana-Garcon J.. Measures of precision for dissimilarity-based multivariate analysis of ecological communities[J],2015,18(1).
APA	Anderson M.J.,&Santana-Garcon J..(2015).Measures of precision for dissimilarity-based multivariate analysis of ecological communities.Ecology Letters,18(1).
MLA	Anderson M.J.,et al."Measures of precision for dissimilarity-based multivariate analysis of ecological communities".Ecology Letters 18.1(2015).