Habitat biologists play a leading role in managing and protecting wildlife, fish and their habitats.
Also known as conservation biologists , fish biologists or wildlife biologists , they try to prevent the degradation of natural habitats and restore ecosystems, such as forested areas where over-cutting of trees has led to erosion and silted up streams. They also work to prevent the extinction of species by promoting sustainable land and water management. Studying fish populations is the domain of fishery biologists. They are interested in how currents, tides, water temperature, pollution and over-fishing impact aquatic life habitat and health. To protect fish populations, they test for contaminants, estimate fish supply and develop management plans.