Life Sciences Commons^™

Predicting The Viability Of Fish Populations In A Modified Riverine Environment, Henriette I. Jager

Doctoral Dissertations

Riverine fishes evolved to life in a highly variable, flow-driven environment. During the two past centuries, large rivers have been substantially altered by human activities. This has resulted in declines of fish populations that depend on the large river environment.

The research described here uses models to evaluate the effects of human activities on the viability of fish populations in rivers. I focused on five modifications of the river environment associated with impoundment: (1) seasonal allocation of river flow; (2) diversion of river flow; (3) fragmentation of the river habitat by dams; (4) conversion of free-flowing river to reservoir habitat; …

Analyses Of The Effects Of An Exotic Lizard (Anolis Sagrei) On A Native Lizard (Anolis Carolinensis) In Florida, Using Islands As Experimental Units, Todd S. Campbell

Doctoral Dissertations

The green anole, Anolis carolinensis (Sauria: Polychrotidae), North America's only native anole, was abundant in even the most disturbed urban environs of Florida until recently. The Cuban brown anole, A. sagrei, was introduced to six Florida ports in the 1940s. Since then, it has become the most abundant lizard in peninsular Florida, has spread into Georgia and two other southeastern states, and has been blamed for the decline of A. carolinensis. Because A. carolinensis declines soon after the arrival of A. sagrei, it has been difficult to identify the mechanisms involved. I studied the effect of A. …