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ECOM II

The fitted equation is of the form:

Species abundance (y) = b0 + b1*Environment 1 + b2*Environment 2 +............

bk*Environment k,

where b0, b1,b2.....bk are the fitted parameters.

The upper part of the output grid gives the estimated parameters, their standard

error, the Student t value and its estimated probability. To be significant at the 5%

level a parameter should have a probability < 0.05.

The lower part of the grid gives the Analysis of variance table, the F value and its

probability. The regression explains a significant part of the variation in species

number at the 5% level if the probability value is < 0.05.

Pearson correlations between any two variables (biological or environmental) can be

obtained from the scatter plot tab   see 

Scatter Plot

.

8.1

Scatter Plot

The scatter plot allows you to plot two and three dimensional graphs of any variables

from either the biological or environmental working data grids.

The variables for plotting are selected using the panel below the graph. For each axis,

radio buttons are offered to allow the selection of variables from either the biological

or environmental working array. The variable is selected from the drop down lists.

Copyright 2004  PISCES Conservation Ltd