The Cost of Conservation: The National Wildlife Refuge System
نویسندگان
چکیده
منابع مشابه
Climate change adaptation for the US National Wildlife Refuge System.
Since its establishment in 1903, the National Wildlife Refuge System (NWRS) has grown to 635 units and 37 Wetland Management Districts in the United States and its territories. These units provide the seasonal habitats necessary for migratory waterfowl and other species to complete their annual life cycles. Habitat conversion and fragmentation, invasive species, pollution, and competition for w...
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Forests and rangelands are the most important natural ecosystems which provide many economic benefits to the society due to their biodiversity and ecological functionalities. Dashtenaz wildlife refuge, Sari, is a sylvan region, covering 55 ha of rangeland with abundant diversity, is refuge of an endangered species of deer called Dama mesopotamica. In this study, Contingent Valuation Method (CVM...
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15 صفحه اولRecreational Carrying Capacity of Lake Umbagog National Wildlife Refuge
Recreational carrying capacity addresses the issue of how much and what types of recreation can be accommodated in parks and related areas without unacceptable impacts. Contemporary approaches to carrying capacity rely on formulation, monitoring, and management of indicators and standards of quality. Recreational carrying capacity of Lake Umbagog National Wildlife Refuge, located in northern Ne...
متن کاملSediment quality in freshwater impoundments at Savannah National Wildlife Refuge.
Freshwater impoundments at Savannah National Wildlife Refuge (NWR), South Carolina, provide an important habitat for wildlife species, but degraded sediment quality in the Savannah River downstream of the discharge from two impoundments have caused concern about potential contaminant problems within the impoundments. The quality of sediments from five impoundments (impoundments no. 1, 2, 6, 7, ...
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ژورنال
عنوان ژورنال: BioScience
سال: 2008
ISSN: 0006-3568
DOI: 10.1641/b581104