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"Virginia's climate is changing. Most of the state has warmed about one degree (F) in the last century, and the sea is rising one to two inches every decade. Higher water levels are eroding beaches, submerging low lands, exacerbating coastal flooding, and increasing the salinity of estuaries and aquifers. The southeastern United States has ...
On average, the depth of the bay is 21 feet (6.4 m), including tributaries; [15] over 24 percent of the bay is less than 6 ft (2 m) deep. [16] Because the bay is an estuary, it has fresh water, salt water and brackish water. Brackish water has three salinity zones: oligohaline, mesohaline, and polyhaline.
Most oceanic species (78 per cent, or 44 per cent of all fish species), live near the shoreline. These coastal fish live on or above the relatively shallow continental shelf. Only 13 per cent of all fish species live in the open ocean, off the shelf. Of these, 1 per cent are epipelagic, 5 per cent are pelagic, and 7 per cent are deep water. [16]
"Virginia's climate is changing. Most of the state has warmed about one degree (F) in the last century, and the sea is rising one to two inches every decade. Higher water levels are eroding beaches, submerging low lands, exacerbating coastal flooding, and increasing the salinity of estuaries and aquifers. The southeastern United States has ...
The Dragon Run watershed in the U.S. state of Virginia encompasses 140 square miles (360 km 2) and is home to many flora and fauna species.The brackish water stream, labeled on topographic maps as Dragon Swamp, [1] is fed by underground springs, surface runoff, and numerous feeding swamps. [2]
Several centuries of exploitation and logging reduced the swamp to about 50% of its original size. It was common practice for merchant ships of the time to fill up water casks with the dark-stained water from Lake Drummond. With its high tannin content, the water stayed fresher longer on trans-Atlantic voyages than water from other sources.
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A marine coastal ecosystem is a marine ecosystem which occurs where the land meets the ocean. Worldwide there is about 620,000 kilometres (390,000 mi) of coastline. Coastal habitats extend to the margins of the continental shelves, occupying about 7 percent of the ocean surface area.