Upper Chesapeake - CB5.2 - Maryland Chesapeake Bay Latitude:   38.1370     Longitude:   -76.2280 Associated Investigators: Jacqueline Johnson   Related Web Sites: [chesapeakebay.net/]   Related Time Series: [ Maryland Site CB5.2 ]   [ Virginia Site CB6.1 ]   Mesosooplankton monitoring data were collected from over thirty sites in the Chesapeake Bay and its tidal tributaries on a monthly or bimonthly basis, between 1985 and 2002, as part of the Chesapeake Bay Program (CBP) monitoring program. This summary features two of the centrally-located (middle Bay) sites (Figure 1): CB5.2 (located in the upper "Maryland" region of the Bay), and "CB6.1" (located in the lower "Virginia" region of the Bay). In the the Maryland program, zooplankton were collected with a 202 µm mesh bongo net via stepped-oblique tows from 1/2 meter above the bottom to the surface. In the Virginia program, zooplankton were collected with a 202 µm mesh bongo via double-oblique tows from bottom to surface. Abundance and weight methods were different between states, but consistent within individual sites.