hydrosere

During the pluvial periods when hydrosere-loving shrews populated the Great Basin, that region may have been a treeless grassland.

Vagrant shrews, then as now, probably depended on hydrosere communities, while red squirrels required trees.

The jumping mouse also is limited in its distribution by hydrosere communities, not by forests.

Sorex palustris is tied closely in its distribution to hydrosere communities and is not dependent upon the presence of forests.

These hydrosere situations are the habitat of Sorex vagrans.