Oral Session #13: N Fixation and Biochemical Patterns.

Presiding: D.E. Hibbs, Oregon State University.
Sunday, August 6, 2000
1:00 PM to 3:45 PM
Maybird Room - Cliff Lodge

1:00 PM	Erosion and the regeneration of nutrient supply on an old tropical landscape. VITOUSEK, P.M. , O.A. CHADWICK, L. DERRY, P.A. MATSON, E. MECKING, V.M. MONASTRA
1:15 PM	Biogeochemical patterns along gradients in soil type and land use history in southwestern Costa Rica: Comparisons to the central Amazon. TOWNSEND, A.R. , C.C. CLEVELAND, M.E. LEFER, G.P. ASNER, B. CONSTANCE
1:30 PM	Nitrous oxide mole ratio during denitrification in soil: Evidence for an interaction of ecosystem and recent moisture history. BERGSMA, T.T. , N.E. OSTROM, G.P. ROBERTSON
1:45 PM	Effects of drawdown on phosphorus dynamics of a subtropical wetland. WHITE, J.R. , K.R. REDDY, I. CALZADA-BUJAK
2:00 PM	What makes the desert bloom? The contribution of dust and crusts to soil fertility on the Colorado Plateau. BELNAP, J. , R.L. REYNOLDS, M. REHEIS, S.L. PHILLIPS
2:15 PM	A modeled analysis of N and P limitation in disturbed tropical forests. HERBERT, D.A. , M. WILLIAMS, E.B. RASTETTER
2:30 PM	Nitrogen limitation and ecosystem self-organization: The effects of spatial heterogeneity. JENERETTE, G.D. , J. WU, N.B. GRIMM
2:45 PM	Effects of introduced trees on soils in a Hawaiian montane rainforest. LEVY, E.T. , P.M. VITOUSEK
3:00 PM	Break
3:15 PM	A theoretical examination of symbiotic N fixation. RASTETTER, E.B. , P. VITOUSEK, C. FIELD, G. SHAVER, D. HERBERT
3:30 PM	Do pines fix nitrogen? MH KNOPS, J.