• American Society of Limnology and Oceanography -- June 11-15, University of Nevada, Reno. Co-sponsored by the UC Davis Lake Tahoe Research Group, this year's annual meeting focuses on extreme conditions in marine and fresh-water environments, such as the impacts of ultraviolet radiation. Media contacts: ASLO executive director Susan Weiler, (509) 527-5948, weiler@whitman.edu (scientific highlights) or Judy Arellano, (702) 784-4046 (program and registration). • Ecological Society of America -- July 30 - Aug. 3, Snowbird, Utah. Focusing on the transdisciplinary nature of ecology, this year's annual meeting includes new findings and perspectives on urban ecosystems, plant ecology and evolution, ecosystem processes in rivers and estuaries, ecology and conservation of fragmented tropical forest communities, global change, wetlands, and endangered species report. Media contacts: Nadine Cavender, (202) 416-6182, or Gabriel Paal, 416-6181, ESA Public Affairs.