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Showing 1 to 20 of 42 for “"natural wetlands"”.
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Hydrologic Variations Within Created and Natural Wetlands in Southeastern Virginia
<p>The hydrology of wetlands, particularly how wetland soils collect, store, and redistribute water strongly affects how wetland systems function. In created wetlands, construction processes and materials influence the hydrology and consequently, the potential for successful reestablishment of …
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Distribution and Importance of Stockdams, Dugouts, and Natural Wetlands To Breeding Waterfowl In South Dakota
… by breeding waterfowl of stockdams, dugouts, and natural wetlands were investigated in South Dakota during 1973 and 1974. Wetlands in South Dakota were estimated to encompass 590,499 ha and to total 631,557 basins. Natural ponds and lakes comprised 74.7 percent of the wetland area and 46.0 percent …
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Effects of seasonal changes on the depletion of microflora in natural wetlands in Northern KwaZulu Natal
Natural wetlands are known for their ability to improve water quality through purification and sinking of nutrients and carbon in the sediments. The interactions occurring between microorganism and macrophytes at the rhizosphere also aid in water quality improvement in natural wetlands. In some …
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Functional Equivalency of Created and Natural Wetlands in the Central Appalachians: Reproductive Success, Call Phenology, and Diet Composition of Amphibians
Evaluating the adequacy of created wetlands to replace the functions of lost natural wetlands is important because wetland mitigation is a major tool used to offset wetland losses. However, measurements such as vegetative cover and presence of wildlife may not provide sufficient evidence that …
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Biological Diversity of Natural and Created Wetlands in Three Physiographic Regions of South Dakota
… United States since European settlement. Because wetlands continue to be destroyed and degraded, mitigation through restoration, creation or enhancement is required to maintain wetlands and the species they support. Therefore, this project was designed to compare biological diversity between …
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The status and distribution of rails and other marsh birds in natural and restored wetlands in northern Indiana
… little doubt, however, that the loss of Indiana wetlands during historic times has caused a dramatic decline in rail populations.Using tape-recorded calls to elicit vocalizations, the status and distribution of five species of rails were studied in a 25,900 km2 area in northern Indiana in 1993 …
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Wetland mitigation banking in the Chicago area: an assessment of ecological outcomes and compliance with performance standards
… development projects causing negative impacts to wetlands must provide compensation for wetland losses through the wetland mitigation process. The Army Corps prefers that compensation is provided through the purchase of credits from wetland mitigation banks, which are large wetland restoration …
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Four-Toed Salamander (hemidactylium Scutatum) Nest Site Characteristics In Natural And Constructed Wetlands In Eastern Kentucky
<p>Forested freshwater wetlands have undergone loss and alteration more than other types of wetlands. Wetland creation has slowed wetland losses, but many created wetlands do not functionally replace natural wetlands. Plant and animal communities and wetland drying cycles often differ between …
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Amphibian Community Composition And Disease Susceptibility In Ridge-Top Wetlands Of The Daniel Boone National Forest
<p>Ephemeral wetlands are a natural feature of the ridge-top ecosystem in the Daniel Boone National Forest (DBNF) in eastern Kentucky, and support a diverse amphibian assemblage characterized by species with short larval periods. However, hundreds of hydrologically permanent ponds have been …
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Assessment of Wetland Mitigation in South Dakota
… among restored, created, enhanced and natural wetlands in eastern South Dakota. Almost 500 Section 404 permit applications were submitted in South Dakota from 1996 through 1999. All eligible applications were approved and nearly half of the permits issued included a provision for …
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Efficacy Of Constructed Wetlands Of Various Depths For Natural Amphibian Community Conservation
<p>Wetlands provide critical habitat for a diverse group of amphibians and provide important ecosystem functions and services to humans. Despite this, most natural wetlands have been lost to land use practices. Consequently, constructing wetlands has become a common practice to mitigate for removed …
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A Perceptual Study of Wetlands: Implications for Wetland Restoration in the Urban Area in Malaysia
The restoration of natural wetlands is a wonderful, noble and pragmatic idea, but such efforts often meet resistance from certain segments of society. One reason for this is that the public perceives the environment in different ways than do the experts, such as landscape architects and land …
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Taxonomic homogenization of plant communities in Illinois wetlands and the role of wetland compensation
… represents a severe threat to biodiversity. Wetlands are especially susceptible to biotic homogenization; however, this process has rarely been documented and represents just one of many possible outcomes of compositional change. Additionally, it has been suggested that the practice of …
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Amphibian and plant communities of natural and constructed upland-embedded wetlands in the Daniel Boone National Forest
<p>Wetlands fulfill many vital ecological functions, including providing habitat for amphibians and plants. Some wetlands, known as upland-embedded wetlands (UEWs), are depressional wetlands surrounded completely by upland habitat. This wetland type has been constructed in many areas for …
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An Analysis of Palustrine Mitigation Wetlands in the Virginia Coastal Plain
… projects and their ability to function as natural systems has been questioned. This study was conducted (i) to characterize and examine differences between mitigation and natural wetlands, (ii) to examine differences in soil morphology along a wetness gradient in mitigation and natural …
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Population genetics of wood frogs (Lithobates sylvaticus) in a forested ridge-top wetland ecosystem
… land-use changes impact biodiversity. Ridge-top wetlands are unique habitat for pond-breeding amphibians and the Daniel Boone National Forest (DBNF) contains natural forested ridge-top wetlands in close proximity to constructed wetlands intermixed across the same landscape. Genetic data can be …
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Strategies for systemic urban constructed wetlands
… infrastructure, and the resultant degradation of natural hydrologic networks, most American urban areas have suffered severely compromised hydrological function and health, particularly related to stormwater and its storage, treatment, and flow. Negative externalities exist at multiple scales: …
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Evaluation of Continuous Flow Constructed Wetlands Treating Swine Waste
The ability for wetlands to purify contaminated water is not a new concept. Natural wetlands have been cleansing water within our environment for ages. After studying the process of natural wetlands the same concept was applied to municipal waste. It is the success of constructed wetlands treating …
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Prevalence assessment of the amphibian chytrid fungus Batrachochytrium dendrobatidis across two habitat types in East Tennessee
… investigate how prevalence of Bd varies between natural wetlands and urban retention ponds in East Tennessee while also examining relevant habitat factors and morphometrics. A total of 373 frogs were sampled across six retention ponds and six wetlands distributed evenly between two basin level …
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