The Thin End

New research reveals that many lakes in the continental United States are becoming murkier, with potentially negative consequences for water quality and aquatic life. These are the findings of a study published in Limnology and Oceanography. From blue, clear lakes to greenish brown In the 5 years between 2007 and 2012, the dominant lake type in the United States shifted from clear, blue lakes to greenish-brown, murky lakes. Blue lakes declined by 18% while murky lakes increased by 12%.  Overall, “blue” lakes decreased by ~ 18% (46% of lakes in 2007 to 28% in 2012) while “murky” lakes increased by almost 12% (24% of lakes in 2007 to 35.4% in 2012).  So, the majority of lakes are now murky. Regionally, murky lakes significantly increased in the Northern Appalachian, Southern Plains, and Xeric ecoregions. In the Northern Appalachians, blue lakes decreased by 41.4%, brown lakes increased by 17.8%, and murky lakes increased by 26.8%. In the Northern Plains, gr...