01553naa a2200241 a 450000100080000000500110000800800410001910000190006024500670007926000090014652008910015565000130104665000130105965000110107265300250108365300260110865300270113465300290116170000180119070000290120870000180123777300560125517931872017-03-30       1992    bl ---       0--  u    #d1 aKESSLER, W. B.  aNew perspectives for sustainable natural resources management.  c1992  aThe USDA Forest Service is taking a new direction in its research and management programs in response to changing views of land natural resources. The changes reflect the complexity of socierty's concerns and expectations for national forest management, including biological diversity, ecological function and balance, product yields, social values and the beauty and integrity of natural environments. The new direction involves a shift in management focus from sustaining yields of competing resource outputs to sustaining ecosystems. More than ever, management of public lands and resources requires knowledge about ecosystems, including relationships to human values, activities, and patterns of resource use. Also required are new roles for scientits, including closer partnerships with managers to achieve large-scale studies and adaptive management of public lands and resources.  aforestry  aFloresta  aManejo  aBiological diversity  aDiversidade biologica  aEcossistema sustentado  aEcosystem sustainability1 aSALWASSER, H.1 aCARTWRIGHT JUNIOR, C. W.1 aCAPLAN, J. A.  tEcological Applicationsgv.2, n.3, p.221-225, 1992.