Beaver (Castor Canadensis) Impacts on Herbaceous and Woody Vegetation in Southeastern Georgia

North American beavers are considered ecosystem engineers. Their activities can quickly and drastically alter habitat properties and perhaps permit highly aggressive colonizing plants, notably non-native species, to invade and potentially dominate. This study examined if beavers in southeastern Georgia have an effect on the terrestrial plant community. Sampling areas included beaver modified (N=9) and nearby but relatively non-impacted riparian habitat (N=9) in a matched pairs design. Vegetation surveys were performed in spring and summer. Species richness was calculated for herbs, vines, woody seedlings, and woody vegetation. Richness of herbaceous vegetation was higher at distances closer to shore while richness of large woody vegetation increased with distance from shore. Woody vegetation also was more abundant in beaver sites. Composition was not different between the two site types. The presence of exotic species was rare and did not differ by site type. This study provides evidence that beavers may play an important role in determining the vegetative structure of their community.

Name thesis:degree_name

Master of Science in Biology (M.S.)

Level thesis:degree_level

Thesis (open access)

Discipline thesis:degree_discipline

Department of Biology

Year dc:date.available

2005

Author dc:creator

• Brzyski, Jessica R.

Contributors dc:contributor

• Lissa M. Leege
• Lorne M. Wolfe
• Michelle L. Zjhra

• ETD
• Castor canadensis
• Beaver
• Herbaceous
• Vegetation
• Exotics
• Ecosystem engineers
• Non-native
• Beavers

Repository record dc:identifier

https://digitalcommons.georgiasouthern.edu/etd/707

OAI identifier oai:identifier

oai:digitalcommons.georgiasouthern.edu:etd-1707