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Name: Robert B. McKane

Organizational Affiliation:National Health and Environmental Effects Research Laboratory

Research interests:
Modeling the effects of anthropogenic stressors on terrestrial ecosystem carbon, nitrogen and water dynamics.

Publications:
McKane, R., D. Tingey, H. Lux, P. Beedlow, M. Johnson. Biomass and production budgets for low- and high-elevation Douglas-fir forests in western Oregon. In review.

Homann, P.S., R.B. McKane, P. Sollins. 2000. Belowground processes in forest-ecosystem biogeochemical simulation models. Forest Ecology and Management, in press.

J.D. Lewis, R.B. McKane, D.T. Tingey, P.A. Beedlow. 2000. Vertical gradients in photosynthetic light response within an old-growth Douglas-fir and western hemlock canopy. Tree Physiology, in press.

McKane, R.B., E.B. Rastetter, G.R. Shaver, K.J. Nadelhoffer, A.E. Giblin, J.A. Laundre and F.S. Chapin III. 1997. Climatic effects on tundra carbon storage inferred from experimental data and a model. Ecology 78:1170-1187.

McKane, R.B., E.B. Rastetter, G.R. Shaver, K.J. Nadelhoffer, A.E. Giblin, J.A. Laundre and F.S. Chapin III. 1997. Reconstruction and analysis of historical changes in carbon storage in arctic tundra. Ecology 78:1188-1198.

Rastetter, E.B., R.B. McKane, G.R. Shaver, K.J. Nadelhoffer and A.E. Giblin. Analysis of CO2, temperature and moisture effects on C storage in Alaskan arctic tundra using a general ecosystem model. 1997. In Global Change and Arctic Terrestrial Ecosystems, edited by W. Oechel, T. Callaghan, T. Giomanov, J. Holten, B. Maxwell, O. Molau, and B. Sveingjornsson, pp. 437-451, Springer, New York.

Name: Marirosa Molina

Organizational Affiliation:National Exposure Research Laboratory/Ecosystems Research Division

Research Interests:
Interactions of ecosystem health and water quality with changing climate and land use change: Microbial indicators of change in soils and sediments.

Recent Publications:
Shi, W., M-Y Suhn, M Molina, and R. E. Hodson. 2000. "Deposition of particulate organic matter from various sources in Altamaha estuarine sediments: Evidences from lipid biomarkers and their molecular isotopic composition". Limnol. Oceaonog. In press.

Burke, R. A., M. Molina and J. E. Cox. 1999. "Use of stable carbon isotope ratios of fatty acids to evaluate microbial carbon sources in terrestrial environments", presented at the 1999 Soil Science Society of America National Meeting, Salt Lake City, UT, November, 1999.

Burke, R.A., M. Molina, J. E. Cox, and L. J. Osher. 1998. Abstract. "Effects of land use on the composition and stable carbon isotopic ratio of bacterial fatty acids", presented at the 1998 Soil Science Society of America National Meeting, Baltimore, MD, October 19 - 22, 1998.

Name: Dr.David R. Mount

Organizational Affiliation:National Health and Environmental Effects Research Laboratory

Research Interests:
Interactions of chemical stressors with UV light, particularly the photo-activated toxicity of polycyclic aromatic hydrocarbons. Occurrence of photo-activated toxicity under field conditions. Estimation of ecological risk from photo-activated toxicity. Sediments as a source of exposure to photo-activated toxicants.

Publications:
Diamond, S.A., D.R. Mount, L.P. Burkhard, G.T. Ankley, E.A. Makynen, and E.N. Leonard. 2000. The effect of irradiance spectra on the photo-induced toxicity of three polycyclic aromatic hydrocarbons. (In press)

West, C.W., P.A. Kosian, D.R. Mount, E.A. Makynen, M.S. Pasha, P.K. Sibley, and G.T. Ankley. 2000. Amendment of sediments with a carbonaceous resin reduces bioavailability of polycyclic aromatic hydrocarbons. Environ. Toxicol. Chem. (submitted)

Kosian, P.A, E.A. Makynen, P.D. Monson, D.R. Mount, A. Spacie, O.G. Mekenyan, and G.T. Ankley. 1998. Application of toxicity-based fractionation techniques and structure-activity relationship models for the identification of phototoxic polycyclic aromatic hydrocarbons in sediment pore water. Environ. Toxicol. Chem. 17:1021-1033.

Ankley, G.T., O.G. Mekenyan, P.A. Kosian, D.R. Mount, and E.A. Makynen. 1996. Identification of phototoxic polycyclic aromatic hydrocarbons in sediments through sample fractionation and QSAR analysis. SAR QSAR Environ. Res. 5:177-183.

Name: David M. Olszyk

Organizational Affiliation:National Health and Environmental Effects Research Laboratory

Research Interests:
My research goals are to better define risks to vegetation from specific stresses that that are part of global change such as O3, UV-B, temperature, and CO2;, and to gain a deeper understanding of the fundamental physiological mechanisms by which vegetation responds to these stresses. My research is in four areas: (1) plant growth and developmental responses, (2) physiological and biochemical bases for the responses, (3) methodology used to evaluate ecosystem responses, and (4) modeling and risk assessment. Previouly I studied effects of CO2 and climate change (air temperature) on physiology, phenology and growth of Douglas-fir(Pseudotsuga menziesii), and effects of global climate change and stratospheric ozone depletion on agroecosystems, focusing on Asian rice (Oryza sativa) production. The rice research involved extensive collaboration with the International Rice Research Institute in Los Baños, the Philippines, and with other international scientists including the Global Change and Terrestrial Ecosystems program of the International Geosphere-Biosphere Programme.
Currently I am the leader of a project to determine the interactive effects of O3 and CO2 on a Ponderosa pine plant/litter/soil system. The study tests three hypotheses in terms of key ecosystem function: 1) elevated O3 decreases C, N and H2O cycling.; 2) elevated CO2 increases C, N, and decreases H2O cycling; and 3) elevated CO2 eliminates negative effects of O3 on C and N cycling and has an additive negative effect on H2O cycling. In this study I am evaluating the effects of CO2 and O3 on ponderosa pine seedling biomass allocation, allometry, morphology and phenology. I am working with other researchers at WED to determine the relationship between plant gas exchange and response to pollutants and climatic factors. I am interested in the time course for responses such photosynthesis in relation to O3 flux and sap flow. In conjunction with outside collaborators, I am investigating the role of free radicals in the response of ponderosa pine to O3, and in hydrocarbon emissions from ponderosa pine needles with CO2 and O3 exposure. I will am working with other scientists at WED and elsewhere to obtain experimental data needed for modeling tree growth and productivity on different scales ranging from the single plant to region. I am also evaluating any effects on the chambers on plant growth and gas exchange which need to be considered if the data are to be used for assessment purposes.

Publications:
Guak,S.-H. D.M. Olszyk, L.H. Fuchigami, and D.T. Tingey. 1998. Effects of elevated CO2 and temperature on cold hardiness and bud burst in Douglas-fir (Pseudotsuga menziesii). Tree Physiol. 18:671-679.

Moya, T., O.S. Namuco, L.H. Ziska, and D. Olszyk. 1998. Growth dynamics and genotypic variation in tropical, field-grown paddy rice (Oryza sativa L.) with increasing carbon dioxide and temperature. Global Change Biol. 4:645-656.

Ziska, L.H., T. Moya, O.S. Namuco, R. Levine, R. Wassman, and D. Olszyk. 1998. Elevated carbon dioxide stimulates methane emission in tropical paddy rice. Global Change Biol 4:657-665.

Apple, M.E., M.S. Lucash, D.M. Olszyk, and D. T. Tingey. 1998. Morphogenesis of Douglas-fir buds is altered at elevated temperature but not at elevated CO2. Environ. Exp. Bot. Environ. Exp. Bot. 40:159-172.

Olszyk, D.M., C. Wise, E. VanEss, and D. Tingey. 1998. Elevated temperature but not elevated CO2 affects stem diameter and height of Douglas-fir seedlings: results over three growing seasons. Can. J. For. Res. 28:1046-1054.

Olszyk,D.M., C. Wise, E. VanEss, M. Apple, and D. Tingey. 1998. Phenology and growth of shoots, needles, and buds of Douglas-fir seedlings with elevated CO2 and/or temperature. Can.J. Bot. 76:1991-2001.

Weerakoon, W. M., D.M. Olszyk, and D.N. Moss. 1999. Effects of Nitrogen Nutrition on Responses of Rice Seedlings to Carbon Dioxide. Agric. Ecos. Environ. 72:1-8.

Apple, M.E., M.S. Lucash, D.L. Phillips, D.M. Olszyk, and D. T. Tingey. 1999. Internal temperature of Douglas-fir buds is altered at elevated temperature. Environ. Exp. Bot. 41:25-30

Lewis, J.D., D. Olszyk, and D.T. Tingey. 1999. Seasonal patterns of photosynthetic light response in Douglas-fir seedlings subjected to elevated atmospheric CO2 and temperature . Tree Physiol.19:243-252.

Ormrod, D.P., V.M. Lesser, D.M. Olszyk, and D.T. Tingey. 1999. Douglas-fir needle pigment responses to elevated CO2 and/or temperature and correlations with needle weight and seedling growth. Intl. J. Plant Sci. 160:529-534.

Olszyk, D.M., H.G.S. Centeno, L.H. Ziska, J.S.Kern, and R.B. Matthews. 1999. Global Change, Rice Productivity and Methane Emissions: Comparison of Predicted and Experimental Results. Agric. For. Meteorol. 97:87-101

Name: Carol R. Purvis

Organizational Affiliation:National Risk Management Research Laboratory/Air Pollution Prevention and Control Division

Research Interests:
Co-control evaluations of utilization of biomass as a fuel for small scale power production technologies.

Recent Publications:
Craig, J.D. and C.R. Purvis, "A Small Scale Biomass Fueled Gas Turbine Engine", ASME (IGTI) Turbo Expo '98, Stockholm, Sweden, June 2-5,1998.

Cleland, J.G. and C.R. Purvis, "Demonstration of a 1 MWe Biomass Power Plant at USMC Base Camp Lejeune", Tenth European Biomass for Energy and Industry Conference and Exhibition, Wurzburg, Germany, June 8-11, 1998.

Craig, J.D. and C.R. Purvis, "A Small Scale Biomass Fueled Gas Turbine Power Plant", Tenth European Biomass for Energy and Industry Conference and Exhibition, Wurzburg, Germany, June 8-11,1998.

Schmidt, D.D., C.R. Purvis, and J.G. Cleland, "Biomass Power Plant Demonstration at Camp Lejeune", Bioenergy '98 - The Eight Biennial National Bioenergy Conference, Madison, WI, October 4-8, 1998.

Craig, J.D. and C.R. Purvis, "A Small Scale Biomass Fueled Gas Turbine Power Plant", Bioenergy '98 - The Eight Biennial National Bioenergy Conference, Madison, WI, October 4-8, 1998. http://www.epa.gov/appcdwww/crb/apb/biomass.htm#biomass.

Craig, J.D. and C.R. Purvis, "A Small Scale Biomass Fueled Gas Turbine Engine", Transactions of the ASME - Journal of Engineering For Gas Turbines and Power, Vol 121, Nos 1, pp. 64, Jan 1999.

Cleland, J.G. and C.R. Purvis, "Camp Lejeune Energy from Wood (CLEW) Project", Fourth Biomass Conference of the Americas, Oakland, CA August 29-September 2, 1999. http://www.epa.gov/appcdwww/crb/apb/biomass.htm#biomass.

Purvis, C.R., McCrillis, R.C., and P.H. Kariher, "Fine Pariculate Matter (PM) and Organic Speciation of Fireplace Emissions", Engineering Science and Technology, Vol __, Nos __, pp. __, __ 1999.

Name: Chris Pyke, Ph.D.

Organizational Affiliation:National Center for Environmental Assessment/Global Change Research Program Research Interests:
Assessing the implications of climate and land use change for environmental management and biological conservation. Current projects include research on the effects of combinations of grazing, habitat loss, and climate change for ephemeral wetland ecosystems, development of strategies for the placement and management of biological reserves subject to climate and land-use change, and assessment of the implications of conservation easements for biological conservation, ecosystem services, and regional land-use patterns. These projects involve the extensive use of Geographic Information Systems, spatial analysis, and dynamic, spatially-explicit simulation modeling.

Recent Publications:
Pyke, C.R. In press. Assessing suitability for conservation action: prioritizing interpond linkages for the California tiger salamander. Conservation Biology

Pyke, C.R. and D.T. Fischer. In press. Selection of bioclimatically representative biological reserve systems under climatic change. Biological Conservation

Pyke, C.R., S.J. Andelman, and G.F. Midgley. In press. Identifying priority areas for bioclimatic representation under climate change: a case study for Proteaceae in the Cape Floristic Region, South Africa. Biological Conservation

Pyke, C.R. In press. Assessing climate change impacts on vernal pool ecosystems and endemic branchiopods. Ecosystems

Pyke, C.R. 2004. Habitat loss confounds climate change impacts. Frontiers in Ecology and the Environment 2:178-182

Pyke, C.R. 2004. Simulations of vernal pool hydroregimes for two locations in California. Ecological Modelling 173:109-127

Name: Catriona Rogers

Organizational Affiliation:National Center for Environmental Assessment/Global Change Research Program

Research Interests:
Impacts of global change on ecosystems and water quality. Selected areas of emphasis: ecological (risk) assessment at watershed to regional scales; stakeholder involvement; habitat assessment and bioassessment; aquatic ecosystems; Mid-Atlantic Region.

Recent Publications:
Rogers, CE and McCarty JP. "Climate change and ecosystems of the Mid-Atlantic Region". Climate Research. In press (2000). Hard copy available.

Contributed to "Preparing for a Changing Climate: The Potential Consequences of Climate Variability and Change - Mid-Atlantic Overview", A Report of the Mid-Atlantic Regional Assessment Team for the U.S. Global Change Research Program. March 2000.
(Report available at Penn State website: http://www.essc.psu.edu/mara/results/overview_report/index.html.)

Rogers, CE. "A Method to Assess the Ecological Integrity of Urban Watersheds That Integrates Chemical, Physical and Biological Data". Ph.D. Dissertation, Massachusetts Institute of Technology, 1998. Abstract available.

Name: Paul T. Rygiewicz

Organizational Affiliation:National Health and Environmental Effects Research Laboratory

Research Interests:
Ecological Physiology of Woody Plants and Associated Soil Microorganisms

	Nutrition of plants and soil microorganisms
	Molecular ecology techniques for soil ecology
	Physiology of the ectomycorrhizal symbiosis
	Physiological responses of plants to environmental stresses
	Carbon acquisition, allocation and partitioning processes
	Stable and radioactive isotope procedures in lab and field settings

Global Climate Change Processes and Effects
	Atmosphere-to-atmosphere carbon flow: into and through plants, into and through soils, returning to atmosphere
	Activities of roots, and activities and community structure of soil flora and fauna

Publications:
Hobbie, E.A., D.M. Olszyk, P.T. Rygiewicz, M.G. Johnson, and D.T. Tingey. Foliar nitrogen levels and natural abundance 15N reveal mycorrhizal-plant partitioning and recycling of N during development under climate change. In prep. Plant, Cell, and Environment.

Martin, K.J. and P.T. Rygiewicz. The use of DNA fingerprinting to support a superficial root tip morphological classification of ectomycorrhizal fungi: new ITS primers. In prep. The New Phytologist.

Rygiewicz, P.T., K.J. Martin and A.R. Tuininga. Changes in morphological diversity of ectomycorrhizas on Douglas-fir (Pseudotsuga menziesii Mirb. Franco) seedlings along an elevational climatic gradient. In prep. Canadian Journal of Botany.

Lin, G., P.T. Rygiewicz, J.R. Ehleringer, M.G. Johnson and D.T. Tingey. Time-dependent responses of soil CO2 efflux to elevated atmospheric [CO2] and temperature treatments in experimental forest mesocosms. Submitted to Plant and Soil.

Rygiewicz, P.T., K.J. Martin and A.R. Tuininga. 2000. Morphotype community structure of ectomycorrhizas on Douglas-fir (Pseudotsuga menziesii Mirb. Franco) seedlings grown under elevated atmospheric CO2 and temperature. Oecologia. In Press.

Rygiewicz, P.T. and E.R. Ingham. 1999. Soil biology and ecology. In: Encyclopedia of Environmental Science. Edited by D.E. Alexander and R. W. Fairbridge. Kluwer Academic Publishers. Dordrecht, The Netherlands. pp. 564-568.

Lin, G., J.R. Ehleringer, P.T. Rygiewicz, M.G. Johnson, and D.T. Tingey. 1999. Elevated CO2 and temperature impacts on different components of soil CO2 efflux in Douglas-fir terracosms. Global Change Biology 5, 157-168.

Andersen, C.P. and P.T. Rygiewicz. 1999. Understanding plant-soil relationships using controlled environment facilities. Advances in Space Research 24(3), 309-318.

Rygiewicz, P.T., M.G. Johnson, L. Ganio, D.T. Tingey and M. Storm. 1997. Lifespan and seasonal occurrence of Pinus ponderosa ectomycorrhizae grown under elevated atmospheric CO2 and varying nitrogen levels. Plant and Soil, 189, 275-287.

Rygiewicz, P.T., K.J. Martin and A.R. Tuininga. 1997. Global climate change and diversity of mycorrhizae. In: Progress in microbial ecology. M.T. Martins, M.I.Z. Sato, J.M. Tiedje, L.C.N. Hagler, J. Döbereiner and P.S. Sanchez (eds.). International Committee on Microbial Ecology/Brazilian Society for Microbiology. Soc. Brasileira de Microbiologia. Cidade Universitária - USP. Sã o Paulo - SP, Brazil. pp. 91-98.

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