ERIE , PADozens of biologists will study Lake Erie starting next month in whats being called one of the largest research projects ever on the Great Lakes. The two-year international project, which is being led by the U.S. Department of Commerces National Oceanic and Atmospheric Administration (NOAA), will focus on the lakes food chain. Research will start at the microscopic level and (will encompass everything up to predator species, such as walleyes and bass. As part of the study, approximately 10 research ships will concentrate on the lakes Central Basin, an area from Huron to Erie, Pennsylvania, that has seen fluctuating levels of phosphorus and lower levels of oxygen during the past decade. Researchers say theyll attempt to learn why low oxygen levels recur in the Central Basin and whether they affect fish and other aquatic creatures. A number of federal, state and local government agencies in the United States and Canada, plus 15 universities, will be part of the multimillion-dollar study.