Beta diversity reconsidered

Giovanni Bacaro; Margherita Gioria; Carlo Ricotta

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Beta diversity reconsidered

机译：重新考虑Beta多样性

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摘要

A simple analytical procedure to test for differences in beta diversity among sets of plots has been recently presented. Here, we describe an improved randomization procedure that replaces the one previously proposed. This procedure consists of shuffling within-group dissimilarities among groups and disregarding between-group dissimilarities. By repeating this operation many times, a distribution of the test statistics under the null hypothesis of no differences in the mean plot-to-plot dissimilarities within groups is obtained. This procedure ensures that the correct null model is selected. To describe this new procedure, we used plant and water beetle (Coleoptera) data collected from 45 permanent ponds. Beta diversity was compared between plant and water beetle (Coleoptera) assemblages.

机译：最近已经提出了一种简单的分析程序来测试各组图之间的β多样性差异。在这里，我们描述了一种改进的随机程序，它取代了先前提出的程序。该过程包括改组组间的组内差异和忽略组间的差异。通过多次重复此操作，可以获得在组内平均图间差异不存在差异的零假设下检验统计量的分布。此过程可确保选择正确的空模型。为了描述这一新程序，我们使用了从45个永久性池塘收集的植物和水甲虫（鞘翅目）数据。在植物和水甲虫（鞘翅目）组合之间比较了Beta多样性。

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来源
《Ecological research》 |2013年第3期|537-540|共4页
作者
Giovanni Bacaro; Margherita Gioria; Carlo Ricotta;
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作者单位

CNR-IRPI, Istituto di Ricerca per la Protezione Idrogeologica, Via Madonna Alta 126, 06128 Perugia, Italy,BIOCONNET, Biodiversity and Conservation Network,Department of Environmental Science "G. Sarfatti",University of Siena, Via P. A. Mattioli 4, 53100 Siena, Italy;

Institute of Plant Ecology, Justus-Liebig University Giessen,Heinrich-Buff Ring 26, 35392 Giessen, Germany;

Department of Plant Biology, University of Rome 'La Sapienza',Piazzale Aldo Moro 5, 00185 Rome, Italy;

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原文格式 PDF
正文语种 eng
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关键词
Dissimilarities; Matrix randomization Multivariate dispersion; Null model;

机译：差异;矩阵随机化多元分散空模型;

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Beta diversity reconsidered

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