Standard mist nets and Anabat acoustical monitoring devices were used to explore species diversity in a tornado-disturbed forest as well as the surrounding undisturbed forest within Mermet Lake State Forest and Wildlife Area (MLSFWA), located in southern Illinois. Preliminary data on bat species do not exist for the area. On 6 May 2003, a class four tornado touched down in Southern Illinois, partially affecting the Mermet Lake State Forest and Wildlife Area. The landscape was changed creating an alternate environment, one of broken trees and a dense growth of underbrush surrounded by untouched areas of thick canopy and agricultural fields. I examined bat species diversity within the tornado disturbed area and within the undisturbed areas. To make comparisons, mist nets and Anabat acoustical monitoring devices were used to determine species diversity within the disturbed and undisturbed sites. The data were gathered during the summers of 2004 and 2005. Ten species of bats were caught using mist nets. The Anabat system documented 11 species. Of the species of bats captured, two are considered endangered or threatened: the southeastern bat, Myotis austroriparius (state threatened), and the Indiana bat, Myotis sodalis (federally endangered). Additionally, the eastern small-footed bat, Myotis leibii recently documented in Illinois, was recorded. Overall, mist net results suggest a higher diversity in the undisturbed forest (H' = 1.69) than the tornado-disturbed forest (H' = 1.12). The Anabat system results suggest a similarity of bat species in both habitats (Jaccard coefficient = 0.818). From a conservation viewpoint, the tornado-disturbed area should remain unsalvaged; bats are using the area because it provides habitat with alternative structural characteristics such as snags for possible roosting sites.Within temperate regions most bats produce a litter of a single pup, though some species are reported to have twins ... one of the leading factors responsible for the decline of many bat species in North America (Kunz and Fenton, 2003). Body size, linked to the amount of expendable energy that can be used for foraging or hunting, is in linear proportion to an animala#39;s metabolic rate (Lindstedt et al., 1986 ).
|Title||:||Differences in Bat Communities Between a Tornado Disturbed and Undisturbed Site at Mermet Lake State Forest and Wildlife Area|
|Author||:||Jennifer Marie Wolff|
|Publisher||:||ProQuest - 2007|