Publisher: USGS | Science Center: Columbia Environmental Research Center (CERC, Columbia) | Format: URL
www.cerc.usgs.gov — The ultraviolet radiation (UV) component of sunlight can pose a direct threat to aquatic flora and fauna. This issue overview describes the interactive effects of ultraviolet radiation on vertebrate and invertebrate organisms from freshwater and coastal habitats, and interactive effects of ultraviolet radiation on vertebrate and invertebrate More...
Publisher: USGS | Science Center: Western Ecological Research Center (WERC, Sacramento) | Format: URL
www.werc.usgs.gov — Once an abundant frog throughout much of central and southern California, the California red-legged frog (Rana draytonii) is now rare in the Sierra Nevada foothills and the southern portion of its range. In parts of the central Coast Range, however, large, vigorous populations do remain. Most protection efforts for this threatened species have More...