Исследование биотопов австралийских раков

Ecologists from The Australian National University (ANU) have found that Murray crayfish numbers plunged 90 per cent in a high country river after their habitat was lost. Although alpine streams can be hotspots for crayfish, the population crashed after their preferred habitat, deeper pools containing boulders and overhanging shade trees, was impacted by vegetation clearing and sedimentation. “Murray crayfish have been in decline in lowland rivers such as the Murrumbidgee and Murray, so these mountain str