Charles Drost's work focuses on biological inventory studies and on the population status, population dynamics, and population genetics of a wide variety of animal species.
Most of this work has been on threatened or rare species on lands managed by Federal agencies in the southwest U.S., including the southern California Channel Islands and on National Park lands in California, Arizona, New Mexico, and Utah. Many of the concerns of conservation and land management are focused on the population status, habitat relationships and, ultimately, long-term protection and restoration of plant and animal species. Charles Drost works on biological inventory studies and on the population status, population dynamics, and population genetics of a wide variety of animal species. Most of these studies are on threatened or rare species on lands managed by Federal agencies. Inventory studies have covered the southern California Channel Islands, National Park lands in the Southwest, and the southwestern states as a whole, as part of the National GAP program. Current studies include:
- Amphibian populations and amphibian declines, particularly the northern leopard frog, in the U.S. Southwest.
- Population ecology and population trends of the island night lizard on the California Channel Islands.
- Inventories, population status and distribution, and habitat relationships of rare land snails in the southern California coastal region and offshore islands.
Science and Products
Status of Northern Leopard Frogs in the Southwest
Science and Products
- Publications
- Science
Status of Northern Leopard Frogs in the Southwest
Although it is not listed on the Federal Endangered Species list, there is considerable concern over northern leopard frog declines in western North America. It is listed as a “special concern” species by some state wildlife agencies (e.g., Arizona Game and Fish Department 1996) and declines have been reported in Arizona, Colorado, New Mexico, and other areas across the west. Leopard frogs have... - Data