The Bay’s oxygen-poor “dead zone” was back down to average size in late August– after reaching near-record size earlier in the summer. About Michigan News, Office of the Vice President for Communications Views expressed here do not necessarily reflect those of ScienceDaily, its staff, its contributors, or its partners. Questions?

Measurements of the Chesapeake Bay’s dead zone go back to 1950, and the 30-year mean maximum dead zone volume is 1.74 cubic miles. ScienceDaily, 24 October 2018. The Annual Chesapeake Bay Hypoxia Report Card is the brainchild of Dr. Marjy Friedrichs of the Virginia Institute of Marine Science and Dr. Aaron Bever of Anchor QEA, an environmental and engineering consulting firm. Chesapeake Bay: Larger-than-average summer 'dead zone' forecast for 2018 after wet spring Jun 18, 2018 Penn State researchers to boost endangered Chesapeake logperch population “The bay is rebounding and responding, as seen by record submerged aquatic vegetation totals. Spring rains contributed more nutrient pollution to the Bay, While blue crabs can survive in areas with dissolved oxygen levels of 3 mg/L, white perch, American shad and striped bass need 5 to 6 mg/L. This year’s above-average rainfall washed nutrients from the upper watershed into the Bay. Tel: (800) YOUR-BAY (968-7229) “Despite the forecast, bottom dissolved oxygen concentrations in Maryland’s portion of the Chesapeake Bay mainstem have continued to increase since 2014, and last year we recorded the second-smallest hypoxic volume ever,” said Bruce Michael, director of the Resource Assessment Service at the Maryland Department of Natural Resources. This year’s findings will be released in the fall. Scientists predict the Chesapeake Bay will see an above-average dead zone this summer, due to this spring’s increased amount of rain. The excess nutrients stimulate an overgrowth of algae, which then sinks and decomposes in the water. Blue crabs, underwater grasses and other aquatic life rely on dissolved oxygen to survive. Comet Found to Have Its Own Northern Lights, Ocean Carbon: Humans Outpace Ancient Volcanoes, Patterns in 66 Million Years of Earth's Climate, How Coronavirus Took Hold in N. America, Europe, Missing Ingredient in Dark Matter Theories, Strict Social Distancing, Lower COVID-19 Risk. This year, above-average spring rainfall and streamflow is transporting nitrogen to tidal waters in amounts slightly above the long-term average, according to the U.S. Geological Survey, which provides the nitrogen-loading estimates used to generate the annual hypoxia forecast. This summer’s Chesapeake Bay hypoxic or dead zone, an area of low to no oxygen that can kill fish and other aquatic life, is expected to be about 1.9 cubic miles (7.9 cubic kilometers), according to the forecast released today by the two universities.


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