Oral Session #51: Disturbance Ecology: Harvesting, Grazing and Roads.

Presiding: M.A. Hawke, University of Washington, Seattle.
Tuesday, August 8, 2000
1:00 PM to 5:15 PM
Cottonwood Room II - Sports Event Center

1:00 PM	Population-level effects of defoliation in the tropical understory palm Chamaedorea elegans. ANTEN, N.P.R. , M. MARTINEZ-RAMOS, D.D. ACKERLY
1:15 PM	Sugar maple mortality on the Allegheny National Forest from 1990-1999 in relation to management and defoliation. LONG, R.P. , J. OMER, R. WHITE
1:30 PM	Highway impacts on animal populations and a way to reduce mortality and fragmentation. BOARMAN, W.I. , M. SAZAKI
1:45 PM	Modeling the ecological consequences of an alternative management regime for northern hardwoods. BRAGG, D.C. , D.W. ROBERTS, T.R. CROW
2:00 PM	The effect of windthrow disturbance and salvage logging on nitrogen cycling in a coniferous forest ecosystem. RUMBAITIS-DEL RIO, C. , C.A. WESSMAN
2:15 PM	Predicting the impacts of harvesting using structured population models: An example based on tropical trees. WATKINSON, A. , R. FRECKLETON
2:30 PM	Four-year response of the herbaceous layer to harvesting in a mixed coniferous-deciduous forest. ROBERTS, M.R.
2:45 PM	Comparative effects of Gunnison's prairie dogs and banner-tailed kangaroo rats on plants and grasshoppers in a semi-arid grassland. DAVIDSON, A.D. , D.C. LIGHTFOOT, J.R. GOSZ
3:00 PM	Break
3:15 PM	Effects of grazing on the spatial heterogeneity of vegetation. ADLER, P.B. , D.A. RAFF, W.K. LAUENROTH
3:30 PM	Nitrogen and phosphorus cycling in relation to grazing and land use in subtropical rangelands. BOHLEN, P.J.
3:45 PM	The effects of livestock grazing and climate variation on vegetation and grasshoppers in the northern Chihuahuan Desert. LIGHTFOOT, D.C. , L.F. HUENNEKE
4:00 PM	Regional conservation planning in Australian rangelands JAMES, C.D. , A. FISHER, M.S. SMITH, J. LONGWORTH, J. MACONOCHIE, R. TYNAN, J. LANDSBERG
4:15 PM	Modeling the effects of livestock densities with the Savanna ecosystem model. CHRISTENSEN, L. , M.B. COUGHENOUR, J.E. ELLIS
4:30 PM	Factors affecting the permeability of wildlife passages in Banff National Park, Alberta, Canada. WALTHO, N. , A.P. CLEVENGER, K. GUNSON, B. CHRUSZCZ
4:45 PM	Consequences of road construction: The threat of increasing hybridization to a rare plant species. BAGGS, J.E. , J. MASCHINSKI
5:00 PM	Spatial models as an emerging foundation of road system ecology and a handle for transportation planning. FORMAN, R.T.T.