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Showing items 38629 through 38637 of 73379.Pest control that results from the activity of naturally occurring parasitoids is an important service that could help reduce pesticide use.
Shrub cover has increased in semi-arid regions worldwide. This change has generally been viewed as land degradation, due to shrub-induced declines in pastoral productivity. As a consequence, widespread management treatments to reduce shrub density have been applied in many pastoral areas.
A hedonic property value model, derived from a dynamic game theoretic framework, is estimated using data obtained for 211 subdivisions including 4628 building lots in five Maryland counties.
Low-input farming practices in many parts of the developing world have pushed cultivation onto marginal lands. Sustainability of already fragile ecosystems is threatened. Farmers place a high priority on satisfying subsistence food needs with on-farm production.
Largeâscale monitoring of avian species is often conducted by observers driving rural roads and highways. Surveys along roads allow for easy and reliable access over time and the ability to survey large geographic areas in a relatively short period of time.
Although spatial scale is important for understanding ecological processes and guiding conservation planning, studies combining a range of scales are rare.
Larch tree species (Larix Mill.) are both ecologically and commercially valuable in their native range and are the focus of many restoration, afforestation, and commercial reforestation efforts in the boreal forests of the northern hemisphere.
Tropical coastal wetlands form complex and dynamic ecosystems based on a mixture of vegetation, soil, and water components.
Water is critical to protecting wetlands in arid regions, especially in agriculture-dominated watersheds. This comparative case study analyzes three federal wildlife refuges in the Bear River Basin of the U.S.
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