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This layer includes tidal Benthic Index of Biotic Integrity (B-IBI) data for randomly selected stations in the Choptank River (1995-2014). Data were collected by the Chesapeake Bay Program/Versar (http://www.versar.com/, http://www.chesapeakebay.net/data/downloads/baywide_benthic_database). A probability based sampling component was added in 1994 to assess benthic community condition at randomly selected sites throughout the Chesapeake Bay mainstream and tributaries to assess bay-wide patterns and spatial variability. In each of ten strata, 25 randomly selected sites are allocated each year, with one sample collected at each site. This layer displays randomly selected stations that have been sampled within the Choptank by year. |