The temperate climate, productive soils, and lush forests of the South support an abundant and diverse wildlife community. But these forests and the wildlife that inhabit them have never been stable. They have continually been molded by a variety of forces. Early, during the Pleistocene period, drastic periodic climatic shifts wrought wholesale changes to the nature of southern forests. And more recently, floods, ice and wind storms, insects and diseases, and interactions of the vertebrate species themselves have played a continual role in the dynamics of these forests.
Dickson, James G. 2003. Wildlife of southern forests habitat & management: Introduction. In: Dickson, James G., comp. ed. Wildlife of southern forests habitat & management. Blaine, WA. Chapter 4. Hancock House Publishers: 17-19