Gloeotrichia echinulata density at four nearshore sites in Lake Sunapee, NH, USA from 2005-2016

Surface densities of Gloeotrichia echinulata, a filamentous colonial cyanobacterium, were collected at four nearshore sites in Lake Sunapee, NH, USA from 2005-2016. Lake Sunapee is a large (1667 hectare surface area), oligotrophic, north temperate lake used for drinking water and recreation with a primarily forested watershed and a moderately-developed shoreline. Samples were collected approximately weekly at Herrick Cove South and Newbury mid-July to September in 2005 and at Herrick Cove South late June to mid-September in 2006. Data collection at Herrick Cove South, Newbury, South of the Fells, and Sunapee Harbor occurred from mid-June to mid-September in 2007-2008 and from May to October in 2009-2016.