Inland Fisheries

9.1.2 Ways by which exotic species affect native species

Non indigenous species

• eliminate native species through competition or predation
• contribute to a reduction in local biodiversity
• bring with them novel parasites and pathogens into the invaded area
• erode or dilute local genetic diversity by hybridising with the indigenous species
• alter habitat in ways that render it unsuitable for the local species
• reduce ecosystem productivity and thus cause economic losses