Lake Tahoe's internationally famed water clarity has been declining steadily for the past 25 years, and scientific studies are beginning to reveal a clear story about how and why the lake is changing. The UC Davis Tahoe Research Group will discuss long-term trends and work-in-progress at a meeting beginning at 9 a.m. Wednesday, Sept. 15, in the Lake View Suite of the North Tahoe Conference Center, Kings Beach. The one-day meeting is free and open to the public. Sponsored by the UC Davis Center for Ecological Health Research, the meeting will address how nutrients entering the California resort lake from the watershed and atmosphere are contributing to declining water clarity, the increasing importance of phosphorus in stimulating the growth of algae, historical evidence for changes in whole-lake sediment accumulation, and other issues related to fish and marine operations. "We want to give regulatory agencies and other interested parties the latest scientific evidence to make real-world decisions concerning watershed management and land-use policy," says John Reuter, a UC Davis researcher and director of the Lake Tahoe Interagency Monitoring Program.