Our Living RL'S(mrcc's 



Amphibians 124 



A Success Story: The Barton Springs Salamander 125 



American Alligators in Florida 127 



Reptiles and Amphibians in the Endangered Longleaf Pine Ecosystem 129 



Native Ranid Frogs in Calitornia 131 



Desert Tortoises in the Mojave and Colorado Deserts 135 



Coachella Valley Fringe-toed Lizards 137 



Disappearance of the Tarahumara Frog 138 



Fishes 



Overview 141 



Imperiled Freshwater Fishes 142 



Southeastern Freshwater Fishes 144 



Loss of Genetic Diversity Among Managed Populations 147 



Colorado River Basin Fishes 149 



Cutthroat Trout in Glacier National Park. Montana 153 



Columbia River Basin White Sturgeon 154 



Invertebrates 



Overview 159 



Diversity and Abundance of Insects 161 



Grasshoppers 163 



The Changing Insect Fauna of Albany's Pine Banens 166 



Lepidoptera in North America 168 



Fourth of July Buttertly Count 171 



Species Richness and Trends of Western Butterflies and Moths 172 



The Tall-grass Prairie Butterfly Community 174 



The Biota of Illinois Caves and Springs 176 



Freshwater Mussels: A Neglected and Declining Aquatic Resource 177 



Freshwater Mussels in Lake Huron-Lake Erie Corridor 179 



Aquatic Insects As Indicators of Environmental Quality 182 



Biodiversity Degradation in Illinois Stonellies 184 



Plants 



Overview 189 



Microfungi: Molds, Mildews. Rusts, and Smuts 190 



Macrofungi 192 



Truffles. Trees, and Biodiversity 193 



Lichens 194 



Bryophytes 197 



Floiistic Inventories of U.S. Bryophytes 198 



Vascular Plants of the United States 200 



Environmental Change and the Florida Torreya 205 



Native Vascular Plants 205 



Tracking the Mosses and Vascular Plants of New York (1836- 1994) 209 



Ecosystems . 



Terrestrial Ecosystems 



Overview 213 



U.S. Forest Resources 214 



Southern Forested Wetlands 216 



Rare Terrestrial Ecological Communities of the United States 218 



Altered Fire Regimes Within Fire-adapted Ecosystems 222 



Vegetation Change in National Parks 224 



Air Pollution Effects on Forest Ecosystems in North America 227 



Air Quality in the National Park System 228 



Whitebark Pine: Ecosystem in Peril 228 



Oak Savannas in Wisconsin 230 



Aquatic Ecosystems 



Overview 233 



Habitat Changes in the Upper Mississippi River Floodplain 234 



Biota of the Upper Mississippi River Ecosystem 236 



