Chesapeake Bay supports a diverse assemblage of marine and freshwater species of submersed aquatic vegetation (SAV) whose broad distributions are generally constrained by salinity. An annual aerial SAV monitoring program and a bi-monthly to monthly water quality monitoring program have been conducted throughout Chesapeake Bay since 1984. We performed an analysis of SAV abundance and up to 22 environmental variables potentially influencing SAV growth and abundance (1984-2006).

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We analyzed trends in a 23-year period of water quality and biotic data for Chesapeake Bay. Indicators were used to detect trends of improving and worsening environmental health in 15 regions and 70 segments of the bay and to assess the estuarine ecosystem's responses to reduced nutrient loading from point (i.e., sewage treatment facilities) and nonpoint (e.g., agricultural and urban land use) sources.

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Rock Creek Park (ROCR) is a forest and wetland oasis in the heart of Washington, D.C. A National Park Service natural resource condition assessment (NPS NRCA) was conducted using two synthetic frameworks: 1) an ecological monitoring framework, and 2) a habitat monitoring framework. Data metrics and thresholds were determined and monitoring data applied.

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Referring to both the dynamic nature of the barrier islands forming the coastal lagoons of Maryland’s Atlantic Ocean coastline and also the changing cultural landscape, Shifting Sands is a richly illustrated, multi-authored introduction to Assawoman Bay, Isle of Wight Bay, St. Martin River, Sinepuxent Bay, Newport Bay, and Chincoteague Bay.

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The Florida Department of Environmental Protection (DEP) is developing a new transparency standard for marine waters that will protect the seagrass species found throughout the state. The current transparency standard does not sufficiently protect seagrasses, and the new standard will help DEP identify waters in which transparency is too low for healthy seagrass beds.

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The central Kura River basin is a large river basin in the mountainous South Caucasus region of Eurasia. It contains important water resources for three countries—Georgia, Armenia, and Azerbaijan—and has a combined population of some 17 million people. There are many threats to these shared water resources, including nutrient inputs, heavy metal pollution, and sediment erosion.

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The central Kura River basin is a large river basin in the mountainous South Caucasus region of Eurasia. It contains important water resources for three countries—Georgia, Armenia, and Azerbaijan—and has a combined population of some 17 million people. There are many threats to these shared water resources, including nutrient inputs, heavy metal pollution, and sediment erosion.

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The Chesapeake Bay Program and its partners developed an improved stream health indicator that provides a regional assessment of benthic (bottom-dwelling) macroinvertebrate community health. Benthic data collected in different ways by various natural resource agencies were incorporated into a Benthic Index of Biotic Integrity that rates stream health across the entire 64,000 square miles of watershed that drain into Chesapeake Bay.

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This newsletter describes the second annual Chester River report card. The Chester River Estuary received an overall grade of D and the Chester River creeks received an overall grade of C+. In addition to the grades, the newsletter includes information on increased monitoring, provides a comparison of a healthy and unhealthy Chester River, and suggests actions that citizens can take to improve the health of the Chester River.

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This newsletter is the second annual Patuxent River ecosystem health report card. The report card provides grades for the three tidal regions of the Patuxent River estuary. The grades are based on the frequency that the river is able to meet six ecological targets. The results show the river is generally in poor condition despite a small improvement in the health in 2008 (compared to 2007).

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