Partitioning the variation among spatial, temporal and environmental components in a multivariate data set

Wiley - Tập 23 Số 2 - Trang 158-167 - 1998
Marti J. Anderson1, N. A. Cribble2
1Centre for Research on Ecological Impacts of Coastal Cities and School of Biological Sciences, Marine Ecology Laboratories All, University of Sydney, Sydney, NSW 2006
2Queensland Department of Primary Industry Fisheries, Northern Fisheries Centre, PO Box 5396, Cairns, QLD 4870, Australia

Tóm tắt

Abstract We propose a method of partitioning the variation in a multivariate set of data according to (i) environmental variables, (ii) variables describing the spatial structure in the data and (iii) temporal variables. This method is an extension of an existing method for partialling out the spatial component of environmental variation, using canonical analysis. Our proposed method extends this approach by including temporal variables in the analysis. Thus, the partitioning of variation for a data matrix of species’abundances or biomass can include, by our methodology, the following components: (1) pure environmental, (2) pure spatial, (3) pure temporal, (4) pure spatial component of environmental, (5) pure temporal component of environmental, (6) pure combined spatial/temporal component, (7) combined spatial/temporal component of environmental and (8) unexplained. In addition, permutation testing accompanying the analyses allows tests of significance for the relationship between the different components and the species data. We illustrate the method with a set of survey data of penaeid species (prawns) obtained on the far northern Great Barrier Reef, Australia. This extension is a useful tool for multivariate analysis of ecological data from surveys, where space, time and environment commonly overlap and are important influences on observed variation.

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Wiley

Tập 23 Số 2

158-167

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