Nicholas G. Aumen

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Everglades National Park (ENP) is the last hydrologic unit in the series of impounded marsh units that make up the present-day Everglades. The ENP receives water from upstream Water Conservation Areas via canals and water control structures that are highly regulated for flood control, water supply, wildlife management, concerns about poor water quality and(More)
The discharge of nutrient and ion-enriched agricultural and urban runoff into perimeter canals surrounding the Arthur R. Marshall Loxahatchee National Wildlife Refuge and subsequent intrusion into a natural soft-water marsh is causing ecosystem alterations. Because this habitat is among the last remaining rainfall-driven areas of the Florida Everglades,(More)
Agricultural and urban runoff pumped into the perimeter canals of the Arthur R. Marshall Loxahatchee National Wildlife Refuge (Refuge), a 58,320-ha soft-water wetland, has elevated nutrients which impact the Refuge interior marsh. To best manage the Refuge, linkages between inflows to the perimeter canals and environmental conditions within the marsh need(More)
Everglades restoration is dependent on constructed wetlands to treat agricultural phosphorus (P)-enriched runoff prior to delivery to the Everglades. Over the last 5 years, P concentrations delivered to the northern boundary of Everglades National Park (Park) have remained higher than the 8 μg L(-1)-target identified to be protective of flora and fauna.(More)
The role of woody debris in nutrient cycling was investigated in two catastrophically disturbed streams in the Pacific Northwest that had been subjected to large inputs of wood. One study site in each catchment had all woody debris removed (take section), while the debris in the other study site was left intact (leave section). Nitrate, phosphate and(More)
Plate counts, scanning electron microscopy, and direct observations were utilized to determine successional trends of different groups of microorganisms onProcambarus versutus (Hagen) exoskeletons incubatedin situ in a second-order, acidic woodland stream in Northwest Florida. Plate counts and SEM observations indicated a definite successional pattern(More)
Florida's Everglades stretch from the headwaters of the Kissimmee River near Orlando to Florida Bay. Under natural conditions in this flat landscape, water flowed slowly downstream as broad, shallow sheet flow. The ecosystem is markedly different now, altered by nutrient pollution and construction of canals, levees, and water control structures designed for(More)
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