Environment News Service: In support of watershed protection plans for Florida’s Caloosahatchee and St. Lucie rivers, the South Florida Water Management District Governing Board has approved a contract with the University of Massachusetts to study changes in nutrient levels in the rivers’ estuaries during the 2009 wet season. June through September are Florida’s wettest months. Under the $260,000 agreement, university scientists will take measurements at 50 locations in each estuary for benthic fluxes – …