Anthropogenic nitrogen contributes to water quality degradation, but it is difficult to distinguish sources once they are mixed in coastal ecosystems. Natural abundances of stable nitrogen isotopes (delta N-15) were measured in oyster (Crassostrea virginica) tissues (muscle, gills, and mantle) during summer 2006 to summer 2008 to identify nitrogen sources in Monie Bay (a subestuary of Chesapeake Bay) receiving freshwater inputs from three tributary creeks. The creeks (estimated flushing times:

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The America's Watershed Initiative Report Card project began with a regional workshop for the Upper Mississippi River Sub-Basin, held in Moline, Illinois on September 11–12, 2013. At the workshop, stakeholders and experts from social, economic, and environmental sectors identified easily understood and transparent ways to measure status and trends for the Upper Mississippi River Sub-Basin in relation to six broad goals.

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"Climate change is real. Scientists agree. It's happening now. It's harmful and human-caused.

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"Climate change is real. Scientists agree. It's happening now. It's harmful and human-caused.

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This report card provides a transparent, timely, and geographically detailed assessment of Chesapeake Bay. In 2012, the methods for the report card have changed to include five water quality indicators and two biotic indicators. In 2012, the overall grade for Chesapeake Bay is a 47%, a C. This means the Bay is in moderate health. Fisheries indicators as well as trajectories of reporting region health are also presented. For further details, visit the Report Card website .

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The aim of this report card is to provide a transparent, timely, and geographically detailed assessment of 2012 Coastal Bays health. Coastal Bays health is defined as the progress of four water quality indicators (total nitrogen, total phosphorus, chlorophyll a, dissolved oxygen) and two biotic indicators (seagrass, hard clams) toward scientifically derived ecological thresholds or goals.

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Restoring and expanding coastal and estuarine habitat leads to increases in fish populations, which have a positive impact on the communities and the industries that depend on thriving and sustainable fisheries. This report makes a powerful case that investing in our nation’s coastlines and estuaries leads to healthy habitat and strong fisheries, which has a positive impact on the businesses and industries, both recreational and commercial, that need healthy fisheries to survive and thrive.

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Native to the Gulf of Mexico, Karenia brevis is a toxic dinoflagellate that blooms almost annually off the west coast of Florida. K. brevis blooms are not a new phenomenon on the west Florida shelf, and ships' logs suggest bloom-related events (fish kills) dating back to the 1500s. Coastal regions of Florida have experienced some of the most rapid population growth and development in the United States.

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Native to the Gulf of Mexico, Karenia brevis is a toxic dinoflagellate that blooms almost annually off the west coast of Florida. K. brevis blooms are not a new phenomenon on the west Florida shelf, and ships' logs suggest bloom-related events (fish kills) dating back to the 1500s. Coastal regions of Florida have experienced some of the most rapid population growth and development in the United States.

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Long-term non-linear ecosystem-scale changes in water quality and biotic communities in coastal lagoons have been associated with intensification of anthropogenic pressures. In light of incipient changes in Johnson Bay (an embayment of Chincoteague Bay, Maryland-Virginia, USA), examination of nitrogen sources was conducted through synoptic water quality monitoring, stable nitrogen isotope signatures (deltaN-15) of in situ bioindicators, and denitrification estimates.

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