Chesapeake Bay Benthic Monitoring Program

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Maryland Mid-Bay Mainstem

The upper portion of the Maryland Mid-Bay mainstem sampling stratum includes the main part of the Bay from a point just south of the Severn River to Cove Point, plus Eastern Bay and the mouths of the Choptank and Little Choptank Rivers.  The mainstem segment probabilities of observing degraded benthos are given in Table 1, below. 

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Benthic community condition for upper
Maryland Mid-Bay mainstem sites.
All sites sampled to date (1994-2003) shown.



Table 1.  Total number of sites, degraded sites, and probabilities (90% confidence limits) of observing degraded benthos, non-degraded benthos, or benthos of indeterminate condition for the Maryland Mid Bay mainstem, 1999-2003.

* Probabilities adjusted according to Agresti and Caffo (2000).  Confidence limits adjusted for segments with ≥ 5 sites.  Exact confidence limits used for segments with < 5 sites.
Note: This latest assessment for the Tributary Teams uses only 5 years of data (1999-2003); methods are described in Llansσ et al. 2003.  Segments are Chesapeake Bay Program subunits having similar salinity and hydrographic characteristics.

 

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URL http://esm.versar.com/vcb/benthos/basins/main_mh4.htm

Revised: May 12, 2005.