Oral Session #44: Terrestrial Invertebrates: Foodwebs and Plant Responses.

Presiding: S.W. Seagle, University of Maryland.
Tuesday, August 8, 2000
8:00 AM to 12:00 PM
Cottonwood Room IV - Sports Event Center

8:00 AM	Ecosystem response to hemlock decline from hemlock woolly adelgid in southern New England. ORWIG, D.A. and R.C. COBB, M.L. KIZLINSKI, S.J. CURRIE, D.R. FOSTER
8:15 AM	True-blue, or blue and untrue? Use and misuse of Folin assays of polyphenols in ecological studies. APPEL, H.M. and H.L. GOVENOR, M. D'ASCENZO, E. SISKA, J.C. SCHULTZ
8:30 AM	Variable biochemical responses by oaks to diverse environmental stimuli. SCHULTZ, J.C. and S.D. ALLISON, T. SCHAEFFER
8:45 AM	Associational susceptibility of cottonwood to a box elder herbivore. WHITE, J.A. and T.G. WHITHAM
9:00 AM	Long-term induction, soil nutrient availability and plant genotype: Quaking aspen growth, foliar chemistry and effects on a generalist herbivore. OSIER, T.L. and R.L. LINDROTH
9:15 AM	The effect of water availability on growth, reproduction, and mortality in Plumeria alba: A field experiment in the dry forest of Puerto Rico. SLOAN, S.A.
9:30 AM	Climatic sensitivity of pinyon pine as a predictor of resistance to insect herbivory: An integration of dendrochronology and a long-term insect removal experiment. TROTTER III, R.T. and N.S. COBB, T.G. WHITHAM
9:45 AM	Mechanisms and implications of herbivory-induced decrease in litter C/N ratio in pinyon pine. CHAPMAN, S.K. and G.W. KOCH, N.S. COBB
10:00 AM	Break
10:15 AM	Host plant manipulation of arthropod communities: Acarodomatia mediate antagonistic interactions between beneficial mites. NORTON, A.P. and G. ENGLISH-LOEB
10:30 AM	Keystone species and community structure: Interactions among herbivores determine patterns of arthropod biodiversity. WIMP, G.M. and T.G. WHITHAM
10:45 AM	Comparisons among the arthropod community found at the leaf litter, aerial space under the canopy and on box elder Acer negundo saplings in a hardwood forest in Maryland. MEDINA, R.F. and P. BARBOSA
11:00 AM	Differential responses of forest-floor arthropod predators and prey to long-term detrital subsidy. LAWRENCE, K.L. and D.H. WISE
11:15 AM	Impact of spider predation on densities of forest-floor Collembola. CHEN, B. and K.L. LAWRENCE, D.H. WISE
11:30 AM	Temporal variability in the role of prey availability in the population dynamics of an orb-weaving spider, Tetragnatha versicolor. SMYTH, A.P.
11:45 AM	Testing the multichannel omnivory model: Impact of detrital subsidies on top-down control in a terrestrial grazing food web. HALAJ, J. and D.H. WISE