In this paper, we present a statistical method called STATICO that can be used to analyze series of pairs of ecological tables. The objective of this method is to find the stable part in the dynamics of the relationships between the species and their environment. The treated data are a sequence of pairs of ecological tables. Each pair is made of a species abundance table (species in columns) and an environmental variables table (variables in columns). The sampling sites (in rows) must be the same for the two tables of one pair, but they may be different among the pairs. The environmental variables must be the same in all the environmental tables, and the list of species must be the same in all the species tables too, although some species may be absent from some tables (the corresponding columns will contain all zeros). From a statistical point of view, STATICO is a multitable analysis (partial triadic analysis) performed on the series of cross-tables resulting from the co-inertia analysis of each pair of tables. A small ecological example data set is analyzed and the results are discussed to show how this method can be used to extract the stable part of species––environment relationships. All computations and graphical displays can be performed with free software available on Internet.
Ecology – Ecological Society of America
Published: Jan 1, 2004
Keywords: ADE-4 ; canonical correspondence analysis ; co-inertia analysis ; compromise ; interstructure ; partial triadic analysis ; redundancy analysis ; series of paired ecological tables ; STATICO ; STATIS ; three-way table
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