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Stream/Watershed Service Learning curriculum.
This guide is designed for Grades 3-8 and provides educators and students the opportunity to gain hands-on experiences with water quality monitoring.
Recent online publications
 An
Examination of the Factors that Control Methylmercury Production and Bioaccumulation in Maryland Reservoirs.
The overall study objective is to provide the state of Maryland with information to aid in management of MeHg bioaccumulation in fish in Maryland reservoirs. The concentration of mercury
in fish (normalized by size and species)varies substantially among Maryland lakes and reservoirs. The objective of this study was to determine which characteristics of Maryland lakes and
their watersheds contribute most to this variability. A broad suite of characteristics were examined, including land use in the watershed, watershed size, the physical structure of the
water bodies, water and sediment chemistry, and mercury concentrations and deposition rates.(1.6 MB pdf file)
 Methylmercury Concentrations in Fish from Tidal Waters of the Chesapeake Bay.
A methylmercury (MeHg)-based fish consumption advisory was issued by Maryland Department of the Environment in late 2001 based on measurements of MeHg in largemouth bass from MD
reservoirs. The current study described in this report was designed to examine in more detail the concentration of MeHg in fish that inhabit the tidal portion of the Chesapeake Bay,
specifically striped bass, white perch, and largemouth bass, all recreationally important species. Furthermore, the comparison of data for largemouth bass between the reservoirs and this
study allowed the examination of the potential differences in Hg concentration between reservoir and estuarine fish of the same species. The study also examines the variability in fish
total Hg and MeHg concentration and investigate potential influential factors controlling MeHg in fish.(410KB pdf file)
 MARYLAND BIOLOGICAL STREAM
SURVEY 2000-2004, Volume III: Ecological Assessment of Watersheds Sampled in 2002.
A major goal of the MBSS is to assess the ecological condition of Maryland's streams. This annual report presents results from watersheds sampled in 2002 and includes a history of the
program, a description of methods and survey design, comparative assessments by watershed, detailed results for individual watersheds, and comparisons with Round One results
(1995-1997).
See this summary page for some highlights of this document, or download the full document (12.2 MB pdf file)
 "Mercury
and Methylmercury Concentrations in Water and Largemouth Bass in Maryland Reservoirs" is now online. This technical report examines the concentrations of mercury in
muscle tissue of largemouth bass, and how these concentrations vary with fish size. In addition the study was designed to probe between-lake variability in fish concentration and
investigate potential influential factors controlling mercury in fish. (598 KB pdf file)
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