39

ECOM II

For each sample there are two sets of scores and both are presented in the grid. The

upper set of scores, labelled  Scores derived from the species scores  are calculated

using the species data. The lower set labelled  Scores that are linear combinations of

environmental variables and weights  are derived from the linear combinations of the

environmental variables. The column labelled  Row sum weights  is the total sum of

the observations for each environmental variable and gives the weighting applied to

each environmental variable during the calculations.

These results can be printed or exported from the File menu and copied from the Edit

menu. See 

Export Active Grid

7.11

Ordination Plot

This tab shows the ordination plot of the species and site scores. The graph can also

show the environmental vectors. It will produce a figure that can be used to interpret

the similarity between sites in terms of their species composition and species in terms

of their habitat requirements. When the tab is first selected the graph will show

species, sites and environmental vectors plus their labels.

Copyright 2004  PISCES Conservation Ltd