Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Canonical correspondence analyses (CCAs) biplots of alien and indigenous species assemblages of the four groups: (a) isopods, (b) gastropods, (c) bivalvs, (d) amphipods. For abbreviations of the species see Table 1. Black symbols indicate alien species and gray symbols indicate indigenous species. Significant environmental variables tested by forward selection and 999 Monte Carlo permutations under full model conditions are given.
