Publications about Chesapeake Bay

IAN is committed to producing practical, user-centered communications that foster a better understanding of science and enable readers to pursue new opportunities in research, education, and environmental problem-solving. Our publications synthesize scientific findings using effective science communication techniques.

Nitrogen in the Chesapeake Bay: A Retrospective (Page 1)

Nitrogen in the Chesapeake Bay: A Retrospective

Emily Benson, Heath Kelsey, Jane Hawkey ·
18 August 2010

Nitrogen pollution has been a primary cause of a degraded Chesapeake Bay ecosystem for over a century. Since the Clean Water Act of 1972, Bay monitoring programs have measured the amount of nitrogen coming from human activities and on land (urban, suburban, rural, and industrial) and from natural cycling in the water column. This information is used to evaluate management actions for nutrient reduction.

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Chesapeake Bay Report Card 2009 (Page 1)

Chesapeake Bay Report Card 2009

Caroline Donovan, Heath Kelsey, Sara Powell ·
18 May 2010

This report card provides a transparent, timely, and geographically detailed assessment of 2009 Chesapeake Bay habitat health. The overall health of Chesapeake Bay, assessed using water quality and biotic indicators, was the best it has been since 2002. The overall grade improved from C- in 2008 to C in 2009. Eight reporting regions had improved grades in 2009, four were unchanged, and two had slightly worse grades.

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A Guide to the Mid-Atlantic Tributary Report Cards (Page 1)

A Guide to the Mid-Atlantic Tributary Report Cards

Heath Kelsey, Emily Nauman, Sara Powell, Christine Thurber, Caroline Donovan ·
29 April 2010

A variety of organizations, both government and citizen-led, monitor the health of streams, rivers, and other waterbodies in the mid-Atlantic region. Recently, a number of groups concerned with the health of watersheds in the Chesapeake Bay region have begun to produce ecosystem health report cards much like EcoCheck’s annual Chesapeake Bay report card.

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Eastern oyster (Crassostrea virginica) [delta]15N as a bioindicator of nitrogen sources: Observations and modeling (Page 1)

Eastern oyster (Crassostrea virginica) [delta]15N as a bioindicator of nitrogen sources: Observations and modeling

Fertig BM, Carruthers TJB, Dennison WC, Fertig EJ, and Altabet MA ·
2010

Stable nitrogen isotopes ([delta]15N) in bioindicators are increasingly employed to identify nitrogen sources in many ecosystems and biological characteristics of the eastern oyster (Crassostrea virginica) make it an appropriate species for this purpose. To assess nitrogen isotopic fractionation associated with assimilation and baseline variations in oyster mantle, gill, and muscle tissue [delta]15N, manipulative fieldwork in Chesapeake Bay and corresponding modeling exercises were conducted.

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Long-Term Trends in Submersed Aquatic Vegetation (SAV) in Chesapeake Bay, USA, Related to Water Quality (Page 1)

Long-Term Trends in Submersed Aquatic Vegetation (SAV) in Chesapeake Bay, USA, Related to Water Quality

Orth RJ, Williams MR, Marion SR, Wilcox DJ, Carruthers TJB, Moore KA, Kemp WM, Dennison WC, Rybicki N, Bergstrom P, and Batiuk RA ·
2010

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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Long-Term Trends of Water Quality and Biotic Metrics in Chesapeake Bay: 1986 to 2008 (Page 1)

Long-Term Trends of Water Quality and Biotic Metrics in Chesapeake Bay: 1986 to 2008

Williams MR, Filoso S, Longstaff BJ, and Dennison WC ·
2010

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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Research findings for key bay fisheries species (Page 1)

Research findings for key bay fisheries species

Emily Nauman, Heath Kelsey, Jane Hawkey, Howard Townsend ·
30 September 2009

Fisheries research funded by the NOAA Chesapeake Bay Office (NCBO) provides science and information to enable natural resource managers to make informed decisions. The NCBO Fisheries Science Symposium is a chance for fisheries scientists in the Bay area to present their research findings and create collaborations. This document is an EcoCheck/NCBO collaboration and summarizes some of the key topics presented at the 2009 symposium.

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2008 Chesapeake Bay Report Card (Page 1)

2008 Chesapeake Bay Report Card

Ben Longstaff, Michael Williams, Caroline Donovan, Emily Nauman, Heath Kelsey ·
2 April 2009

This report card provides a transparent, timely, and geographically detailed annual assessment of 2008 Chesapeake Bay habitat health. This is the third year that the report card has been released. This report card rates 15 reporting regions of the Bay using six indicators that are combined into a single overarching index of habitat health. The overall health of Chesapeake Bay was poor in 2008, obtaining a grade of C-.

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New Stream Health Indicator Being Developed (Page 1)

New Stream Health Indicator Being Developed

Katie Foreman, Caroline Donovan, Emily Nauman, Bill Dennison ·
2 April 2009

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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Development and evaluation of a spatially-explicit index of Chesapeake Bay health (Page 1)

Development and evaluation of a spatially-explicit index of Chesapeake Bay health

Williams MR, Longstaff BJ, Buchanan C, Llanso R, Dennison WC ·
2009

In an effort to better portray changing health conditions in Chesapeake Bay and support restoration efforts, a Bay Health Index (BHI) was developed to assess the ecological effects of nutrient and sediment loading on 15 regions of the estuary. Three water quality and three biological measures were combined to formulate the BHI.

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