英皇棋牌

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                    Dead Zones

                    fish kill 695x352

                    Dead zones and algal blooms, which rob our waters of oxygen, often result in devastating "fish kills" like this.

                    Photo Credit: Dave Harp

                    英皇棋牌There were dead fish on the boat ramp eight inches thick. It's just awful.

                    英皇棋牌–Judy Bowie, Mattox Creek Homeowner

                    What are they?

                    英皇棋牌Excessive nitrogen and phosphorus pollution from human activities cause "dead zones"—or areas with low amounts of oxygen in the Bay. With little or no oxygen, fish, crabs, oysters, and other aquatic animals literally suffocate. Further, an excess in these nutrients also fuels the growth of dense algae blooms that block sunlight that underwater grasses need to grow in order to continue providing food for waterfowl and shelter for blue crabs and juvenile fish.

                    What do they do?

                    Judy Bowie recounts a devastating summer just a few years ago when oxygen-deprived waters killed 296,000 fish in Mattox Creek, Virginia. Most of the dead fish were vital menhaden, white perch, and croaker; other species included gizzard shad, catfish, American eel, largemouth bass, and blue crabs. This particular "fish kill" resulted from a Potomac River algal bloom that quickly grew and extended more than 30 miles between Mathias Point and Nomini Bay at the Maryland-Virginia line.

                    英皇棋牌When there are excessive loads of nitrogen and phosphorus in the water, algae can "bloom" to harmful levels, changing water color, and eventually stripping dissolved oxygen from the water when they die, fall to the bottom, and decay. This dissolved oxygen is critical to the health of Chesapeake critters and waters.

                    Where do excessive nutrients come from?

                    • Wastewater treatment plants release treated water—often still containing large amounts of nutrients—into streams and rivers, which eventually flow into the Chesapeake Bay.
                    • Runoff from farmland, urban and suburban areas empty into our streams and rivers carry nutrients from fertilizers, septic systems, boat discharges, and animal manure.
                    • Air pollution from our cars, factories, gas-powered tools, etc. contribute nearly 30 percent of the total nitrogen load to the Bay's waterways.

                    What can we do about them?

                    • Drive less, walk/bike more!
                    • Don't over-fertilize your lawn (or don't fertilize at all!).
                    • Grow oysters.
                    • Buy local food.
                    • Turn off the water when you brush your teeth!
                    • Get more ideas here.

                    英皇棋牌See the on the Virginia Institute of Marine Sciences website.

                    Decades of Success: The 1970s

                    英皇棋牌Even as a young organization, our work was effective and got noticed. Find out what we did.

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