PiscesLogoSmallerStill Methods offered by ECOM

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ECOM offers a range of related techniques for analysing the structure of communities and the distribution of individual species in relation to environmental variables. These are multiple regression, Redundancy Analysis (RA) and Canonical Correspondence Analysis (CCA). For more information about these techniques see Canonical Correspondence Analysis, Multiple Regression Forward and Backward Stepwise Regression and Redundancy Analysis. The program also offers a range of simple statistics and a scatter plotting option.


There are a number of different ways in which the output from Redundancy Analysis and Canonical Correspondence Analysis can be scaled for plotting. The output from RA can be chosen to scale to produce either a distance or correlation biplot, while for CCA it can be scaled with sites at the species centroids or vice versa.