Realm: Freshwater
Climate: Temperate
Biome: Large river ecosystems
Central latitude: 38.901000
Central longitude: -77.069000
Duration: 14 years, from 1990 to 2007

196 records

14 distinct species

Across the time series Chara sp is the most frequently occurring species

Methods

Units are in square kilometers denoting area of submersed aquatic vegetation (SAV) Unit of abundance = NA, Unit of biomass = Cover. See also http://www.pnas.org/content/107/38/16566.full.pdf. Note- no SAV species data for 1991, 1992, 2002, 2006. Areal coverage of SAV is based on aerial photography and species coverage is based on ground data acquired by US Geological Survey personel. Black and white aerial photographs (1:24,000 scale) of the Chesapeake Bay have been acquired annually by the Virginia Institute of Marine Sciences (VIMS). Additionally, methods are detailed in N. B. Rybicki, J. M. Landwehr, Limnol. Oceanog. 52, 1195 (2007). Scientists annually monitored the shoreline by boat and mapped the submerged aquatic vegetation (SAV) in the shallow water (less than 2 m deep; 115 square km), see Campbell, S.H., Rybicki, N.B., and Schenk, E.R., 2015, The distribution of submersed aquatic vegetation and water lettuce in the fresh and oligohaline tidal Potomac River, 2007: U.S. Geological Survey Open-FileReport 2014–1259, 33 p. http://dx.doi.org/10.3133/ofr20141259.

Citation(s)

Ruhl, H. A. & Rybicki, N. B. (2010) Long-term reductions in anthropogenic nutrients link to improvements in Chesapeake Bay habitat. Proceedings of the National Academy of Sciences, 107 (38), 16566–16570. doi:10.1073/pnas.1003590107.