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Flower phenology of Populus tremuloides and Populus grandidentata and the potential for hybridization. School of Natural Resources. Master of Forestry:111pp... 1978.
Occurrence of hybrids between bigtooth and trembling aspen in Michigan. Canadian Journal of Botany. 63:1888-1890.. 1985.
Leaf area and foliar biomass relationships in northern hardwood forests located along an 800 km acid deposition gradient. Forest Science. 37(4):1041-1059.. 1991.
A new dawn for soil biology: video analysis of root-soil-microbial-faunal interactions. Agriculture, Ecosystems and Environment. 34:235-249.. 1991.
Sugar maple seed production and nitrogen in litterfall. Canadian Journal of Forest Research. 21:1148-1153.. 1991.
Use of multivariate methods in forest research site selection. Canadian Journal of Forest Research. 21:1573-1580.. 1991.
A comparison of presettlement and present-day forests on two bigtooth aspen-dominated landscapes in northern Lower Michigan. The American Midlands Naturalist. 127:327-338.. 1992.
Foliar sulfur and nitrogen along an 800-km pollution gradient. Canadian Journal of Forest Research. 22:1761-1769.. 1992.
Ion leaching in forest ecosystems along a Great Lakes air pollution gradient. Journal of Environmental Quality. 21(4):614-623.. 1992.
The demography of fine roots in response to patches of water and nitrogen. New Phytologist. 125:575-580.. 1993.
Elevated atmospheric CO2 and feedback between carbon and nitrogen cycles. Plant and Soil. 151:105-117.. 1993.
Foliar nutrients in sugar maple forests along a regional pollution-climate gradient. Soil Science Society of America Journal. 57:1619-1628.. 1993.
The repeatability of stem exclusion during even-aged development of bigtooth aspen dominated forests. Canadian Journal of Forest Research. 23:1156-1168.. 1993.
The vertical development of early successional forests in northern Michigan, USA. Ecology. 81:271-285.. 1993.
Above- and belowground response of Populus grandidentata to elevated atmospheric CO2 and soil N availability. Plant and Soil. 165:45-51.. 1994.
Belowground responses to rising atmospheric CO2: implications for plants, soil biota and ecosystem processes. Plant and Soil. 165:1-6.. 1994.
Studying the effects of air pollution on forest along exposure gradients: experiences in the United States and opportunities for cooperation. Climate and Atmospheric Deposition Studies in Forests. :109-115.. 1994.
White pine seed-tree legacies in an aspen landscape: influences on post-disturbance white pine population structure. Forest Ecology and Management. 67:191-201.. 1994.
Atmospheric CO2, soil nitrogen and turnover of fine roots. New Phytologist. 129:579-585.. 1995.
Height growth of advance regeneration under an even-aged bigtooth aspen (Populus grandidentata) overstory. The American Midlands Naturalist. 134:166-175.. 1995.
Interacting effects of soil fertility and atmospheric CO2 on leaf area growth and carbon gain physiology in Populus x euramericana (Dode) Guinier. New Phytologist. 129:253-263.. 1995.
Temperature effects on kinetics of microbial respiration and net nitrogen and sulfur mineralization. Soil Science Society of America Journal. 59:233-240.. 1995.
Variability in early height growth rate of forest trees: implications for retrospective studies of stand dynamics. Canadian Journal of Forest Research. 25:767-776.. 1995.
Effects of elevated CO2 and light availability on the photosynthetic light response of trees of contrasting shade tolerance. Tree Physiology. 16:351-358.. 1996.
Elevated atmospheric carbon dioxide and leaf litter chemistry: influences on microbial respiration and net nitrogen mineralization. Soil Science Society of America Journal. 60(5):1571-1577.. 1996.
Fine root respiration in northern hardwood forests in relation to temperature and nitrogen availability. Tree Physiology. 16:719-725.. 1996.
Latitudinal variation in sugar maple fine root respiration. Canadian Journal of Forest Research. 26(10):1761-1768.. 1996.
Linking above- and belowground responses to rising CO2 in northern deciduous forest species. Carbon Dioxide and Terrestrial Ecosystems. :41-51.. 1996.
Nitrate deposition in northern hardwood forests and the nitrogen metabolism of Acer saccharum Marsh. Oecologia. 108:338-344.. 1996.
Soil microbial communities beneath Populus grandidentata grown under elevated atmospheric CO2. Ecological Applications. 6(1):257-262.. 1996.
Ecophysiological responses to simulated canopy gaps of two tree species of contrasting shade tolerance in elevated CO2. Functional Ecology. 11(1):24-32.. 1997.
Effect of measurement CO2 concentration on sugar maple root respiration. Tree Physiology. 17:421-427.. 1997.
Drought reduces root respiration in sugar maple forests. Ecological Applications. 8(3):771-778.. 1998.
Environmental stress effects on vigor, mortality, and growth in northern hardwood forests along a pollution-climate gradient. The Michigan Academician. 30:27-47.. 1998.
Growth and C allocation of Populus tremuloides genotypes in response to atmospheric CO2 and soil N availability. New Phytologist. 140:251-260.. 1998.
Variation in sugar maple root respiration with root diameter and soil depth. Tree Physiology. 18:665-670.. 1998.
Clonal variation in above- and below-ground growth responses of Populus tremuloides Michaux : Influence of soil warming and nutrient availability. Plant and Soil. 217(1/2):119-130.. 1999.
Genotypic variation for condensed tannin production in trembling aspen (Populus tremuloides, Salicaceae) under elevated CO2 and in high- and low-fertility soil. American Journal of Botany. 86(8):1154-1159.. 1999.
Atmospheric CO2 and the composition and function of soil microbial communities. Ecological Applications. 10(1):47-59.. 2000.
Atmospheric CO2, soil-N availability, and allocation of biomass and nitrogen by Populus tremuloides. Ecological Applications. 10(1):34-46.. 2000.
Combined effects of atmospheric CO2 and N availability on the belowground carbon and nitrogen dynamics of aspen mesocosms. Oecologia. 124:432-445.. 2000.
Gas exchange, leaf nitrogen, and growth efficiency of Populus tremuloides in a CO2-enriched atmosphere. Ecological Applications. 10(1):3-17.. 2000.
Genotypic variation in physiological and growth responses of Populus tremuloides to elevated atmospheric CO2 concentration. Tree Physiology. 20:1019-1028.. 2000.
Interactive effects of atmospheric CO2 and soil-N availability on fine roots of Populus tremuloides. Ecological Applications. 10(1):18-33.. 2000.
Kinetics of nitrogen uptake by Populus tremuloides in relation to atmospheric CO2 and soil nitrogen availability. Tree Physiology. 20:265-270.. 2000.
Microbial immobilization and the retention of anthropogenic nitrate in a northern hardwood forest. Ecology. 81(7):1858-1866.. 2000.
Predicting daily mean soil temperature from daily mean air temperature in four northern hardwood forest stands. Forest Science. 46(2):297-301.. 2000.
Relationships between fine root dynamics and nitrogen availability in Michigan northern hardwood forests. Oecologica. 125:389-399.. 2000.
Responses of tree fine roots to temperature. New Phytologist. 147:105-115.. 2000.
Chemistry and decomposition of litter from Populus tremuloides Michaux grown at elevated atmospheric CO2 and varying N availability. Global Change Biology. 7:65-74.. 2001.
Belowground carbon allocation in forests estimated from litterfall and IRGA-based soil respiration measurements. Agricultural and Forest Meteorology. 113:39-51.. 2002.
Measurement of carbon dioxide concentration does not affect root repiration of nine tree species in the field. Tree Physiology. 22:67-72.. 2002.
Anthropogenic N deposition and the fate of 15NO3- in a northern hardwood ecosystem. Biogeochemistry. 69:143-157.. 2004.
Atmospheric nitrate deposition and the microbial degradation of cellobiose and vanillin in a northern hardwood forest. Soil Biology and Biochemistry. 36(6):965-971.. 2004.
Atmospheric nitrate deposition, microbial community composition, and enzyme activity in northern hardwood forests. Soil Science Society of America Journal. 68:132-138.. 2004.
Chronic nitrate additions dramatically increase the export of carbon and nitrogen from northern hardwood ecosystems. Biogeochemistry. 68:179-197.. 2004.
Simulated chronic NO3- deposition reduces soil respiration in northern hardwood forests. Global Change Biology. 10:1080-1091.. 2004.
Atmospheric nitrate deposition and enhanced dissolved organic carbon leaching: test of a potential mechanism. Soil Science Society of America Journal. 69:1233-1237.. 2005.
Characteristics of DOC exported from northern hardwood forests receiving chronic experimental NO3- deposition. Ecosystems. 10:369-379.. 2007.
Decline of arbuscular mycorrhizal fungi in northern hardwood forests exposed to chronic nitrogen additions. New Phytologist. 176:175-183.. 2007.
Chronic Atmospheric NO3- Deposition Does Not Induce NO3- Use by Acer saccharum Marsh.. Ecosystems. 11(3):469-477.. 2008.
Scaling of respiration to nitrogen in leaves, stems and roots of higher land plants. Ecology Letters. 11(8):793-801.. 2008.
Simulated atmospheric NO3- deposition increases soil organic matter by slowing decomposition. Ecological Applications. 18(8):2016-2027.. 2008.
Simulated chronic nitrogen deposition increases carbon storage in Northern Temperate forests. Global Change Biology. 14:142-153.. 2008.
Tree root architecture - form and function. New Phytologist. 180(3):562-564.. 2008.
Nitrogen turnover in the leaf litter and fine roots of sugar maple. Ecology. 91(12):3456-3462.. 2010.
Long-term global change effects on forest biogeochemistry in the north-central United States. Department of Natural Resources and Environmental Science. Doctor of Philosophy:183pp... 2011.
Microbial responses to a changing environment: implications for the future functioning of terrestrial ecosystems. Fungal Ecology. 4(6):386-395.. 2011.
No evidence that chronic nitrogen additions increase photosynthesis in mature sugar maple forests. Ecological Applications. 21(7):2413-2424.. 2011.
Simulated Atmospheric N Deposition Alters Fungal Community Composition and Suppresses Ligninolytic Gene Expression in a Northern Hardwood Forest. PLoS ONE. 6(6):1-10.. 2011.
Simulated N deposition negatively impacts sugar maple regeneration in a northern hardwood ecosystem. Journal of Applied Ecology. 49:155-163.. 2011.
Simulated nitrogen deposition affects community structure of arbuscular mycorrhizal fungi in northern hardwood forests. Molecular Ecology. 20(4):799-811.. 2011.
Air pollution and the changing biogeochemistry of northern forests. Frontiers in Ecology and the Environment. :110622071548013.. 2012.
Chronic nitrogen deposition reduces the abundance of dominant forest understory and groundcover species. Forest Ecology and Management. 293:39-48.. 2013.
Chronic nitrogen deposition alters tree allometric relationships: implications for biomass production and carbon storage. Ecological Applications. 26(3):913-925.. 2016.