A recent report by the Biodiversity Research Institute, the Great Lakes Commission and the University of Wisconsin-LaCrosse claims that mercury contamination across the Great Lakes region has declined in recent decades. Summarizing the findings of 35 research papers, the report found that although mercury pollution affects a broader range of species than previously known, efforts to control mercury pollution have been successful. According to the report, mercury emissions in the region declined by about 50 percent between 1900 and 2005, yet, during that same time, concentrations of mercury in some fish species and birds increased. The report calls for continued efforts to control regional mercury emissions.