An econometric model of private land-use decisions is used to project land use to 2030 for each county in the continental U.S. On a nat. scale, forest area is projected to increase overall between 0.1 & 0.2% per year between now & 2030. However, forest area is projected to decrease in a majority of regions, including the key forestry regions of the South & the Pacific Northwest Westside. Urban area is projected to increase by 68 million acres, & cropland, pasture, rangeland, & Conservation Reserve Program land is projected to decline in area. Regional econometric models are needed to better represent region-specific economic relationships. County-level models of forest fragmentation indices are estimated for the Western U.S. Illus.
The Hymenoptera is one of the largest orders of terrestrial anthropods and compromises the sawflies, wasps, ants, bees and parasitic wasps. This book examines the current state of all major areas of research for this important group of insects, including systematics, biological control, behaviour and use in education.
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