نتایج جستجو برای: protected areas
تعداد نتایج: 447537 فیلتر نتایج به سال:
Declines in marine harvests, wildlife, and habitats have prompted calls at both the 2002 World Summit on Sustainable Development and the 2003 World Parks Congress for the establishment of a global system of marine protected areas (MPAs). MPAs that restrict fishing and other human activities conserve habitats and populations and, by exporting biomass, may sustain or increase yields of nearby fis...
1 HOW THE LOCATION OF ROADS AND PROTECTED AREAS AFFECTS DEFORESTATION IN NORTH THAILAND Maureen Cropper World Bank, MC2-521, 1818 H Street NW, Washington, DC, 20433. Email [email protected], tel. 202-473-1277, fax 202-522-3230 Jyotsna Puri World Bank, MC2-524, 1818 H Street NW, Washington, DC, 20433. Email [email protected], tel. 202-458-4799, fax 202-522-3230 Charles Griffiths U.S. EPA,...
about the substantial risks associated with efforts to conserve nature by fulfilling human needs and appealing to corporate responsibility. Further shifting the limited capacity of conservation towards efforts that prioritize embracing development and advancing human prosperity will come at the expense of other approaches and still leave much of nature imperiled. We remain unclear on whether th...
The benefits of protected areas (PAs) for biodiversity have been questioned in the context of climate change because PAs are static, whereas the distributions of species are dynamic. Current PAs may, however, continue to be important if they provide suitable locations for species to colonize at their leading-edge range boundaries, thereby enabling spread into new regions. Here, we present an em...
This article addresses climate-tipping points in the Amazon Basin resulting from deforestation. It applies a regional climate model to assess whether the system of protected areas in Brazil is able to avoid such tipping points, with massive conversion to semiarid vegetation, particularly along the south and southeastern margins of the basin. The regional climate model produces spatially distrib...
Models provide useful insights into conservation and resource management issues and solutions. Their use to date has highlighted conditions under which no-take marine protected areas (MPAs) may help us to achieve the goals of ecosystem-based management by reducing pressures, and where they might fail to achieve desired goals. For example, static reserve designs are unlikely to achieve desired o...
Overfishing can lead to the reduction or elimination of fish populations and the degradation or even destruction of their habitats. This can be prevented by introducing Marine Protected Areas (MPA’s), regions in the ocean or along coastlines where fishing is controlled. MPA’s can also lead to larger fish densities outside the protected area through spill-over, which in turn may increase the fis...
1. All reserve designs must be guided by an understanding of natural history and habitat variability. 2. Differences in scale and predictability set aside highly dynamic pelagic systems from terrestrial and nearshore ecosystems, where wildlife reserves were first implemented. Yet, as in static systems, many pelagic species use predictable habitats to breed and forage. Marine protected areas (MP...
BACKGROUND Protected areas are the first, and often only, line of defense in efforts to conserve biodiversity. They might be detrimental or beneficial to rural communities depending on how they alter economic opportunities and access to natural resources. As such, protected areas may attract or repel human settlement. Disproportionate increases in population growth near protected area boundarie...
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