Oral Session #9: Respiration and Isotopes.

Presiding: R.D. Yanai, SUNY, Syracuse.
Sunday, August 6, 2000
8:45 AM to 11:30 AM
Alpine North - Sports Event Center

8:45 AM	Differences in carbon isotope values between above and belowground plant material for 15 semidesert grassland species. BIEDENBENDER, S.H. , M.P. MCCLARAN, J. QUADE, M.A. WELTZ
9:00 AM	Stable isotope composition of water vapor and CO2 of air in mesquite-C4 grass vegetation. WILLIAMS, D.G. , G. LIN, J. BRUNEL
9:15 AM	Why is a grass blade like a tree ring? An isotopic model for recording environmental data in grass blades. HELLIKER, B.R , J.R EHLERINGER
9:30 AM	Respiration and growth characteristics in subpopulations of Great Basin cheatgrass have adapted to local microclimates. MCCARLIE, V.W. , B.N. SMITH, L.D. HANSEN, S.E. MEYER
9:45 AM	Seasonal and interannual variations in the isotopic composition of carbon fluxes in a tallgrass prairie ecosystem. STILL, C. , J. BERRY, M. RIBAS-CARBO, B. HELLIKER and S. VERMA
10:00 AM	Break
10:15 AM	Topographic consideration on evapotranspiration, primary production, and soil respiration: An integrated spatially explicit ecosystem model. KANG, S. , S. KIM, D. LEE
10:30 AM	Modeling tree stem temperature to estimate wood respiration. KLOEPPEL, B.D. , M.C. FREEMAN, P.V. BOLSTAD
10:45 AM	Can trees grown in the shade benefit from low respiration rates at elevated CO2? GONZàLEZ-MELER, M.A. , E. NAUMBURG, D. ELLSWORTH, J.N. SIEDOW and W.H. SCHLESINGER
11:00 AM	13C discrimination during biospheric-atmospheric CO2 exchange: Sources of variation in field studies and models. BUCHMANN, N. , J. KAPLAN
11:15 AM	The isotopic composition of ecosystem respiratory fluxes. FESSENDEN, J.E. , J.R. EHLERINGER