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Interns Nicola Clegg (left) and Julie Golod (center) collect soil samples
for denitrification analysis with the help of Research Assistant, Anna
Knipps (right).
Patrick J. Bohlen, Assistant Research Biologist and Director of Research
MacArthur Agro-ecology Research Center,
300 Buck Island Ranch Road
Lake
Placid, Florida 33852 USA
Phone: 863-699-0242 FAX: 863-699-2217 send
e-mail
B.S.
University of Michigan, 1983
M.S. Miami University, 1989
Ph.D. Ohio State University, 1994
Research Interests | Publications | Grants & Contracts | Faculty Appointments | Graduate Students | Research Interns | Professional Service |
Research Interests Current Research | Top
- Biological regulation of nutrient cycling processes in terrestrial and wetland ecosystems.
- Influence of agriculture on ecosystem services (e.g, water quality, carbon sequestration, nutrient retention).
- Controls on microbial biomass and activity and interactions among plants, soils and microbes that affect nutrient cycling.
- Controls on nitrogen transformations in soil..
- Influence of earthworms and other soil fauna and on nutrient cycling.
- Interactions among grazers, productivity, and ecosystem processes in grazing lands.
Selected Recent Publications Top
Gathumbi,
S. M, P. J. Bohlen, and D. A. Graetz. Nutrient
enrichment of wetland plants and sediments in subtropical pastures.
Soil Science Society of America Journal (in press).
Bohlen,
P. J., S. Scheu, C. M. Hale, M. A. McLean, S. Migge, P. M. Groffman and D.
Parkinson. Invasive earthworms as agents of change in north temperate
forests. Frontiers in Ecology and the Environment (in press).
Bohlen, P. J., P. M. Groffman, T. J. Fahey, M. C. Fisk, E. Suárez, D. M. Pelletier and R. T. Fahey. 2004. Ecosystem consequences of exotic earthworm invasion of north temperate forests. Ecosystems 7: 1-12 (pdf).
Bohlen, P. J., P. M. Groffman, T. J. Fahey and M. C. Fisk. 2004. Influence of invasive earthworm on soil organic matter and nutrient retention in north temperate forests. Ecosystems 7: 13-27 (pdf).
Suárez E. R., T. J. Fahey, P. M. Groffman, P. J. Bohlen and M. C. Fisk. 2004. Effects of exotic earthworms on soil phosphorus cycling in two broadleaf temperate forests. Ecosystems 7: 28-44 (pdf).
Groffman, P. M., P. J. Bohlen, P.J., M. C. Fisk and T. J. Fahey. 2004. Exotic earthworm invasion and microbial biomass in temperate forest soils. Ecosystems 7: 45-54 (pdf).
Fisk, M. C., T. J. Fahey, P. M. Groffman and P. J. Bohlen. 2004. Earthworm invasion, fine root distribution and soil respiration in hardwood forests. Ecosystems 7: 55-62 (pdf).
Steinman, A. D., J. Conklin, P. J. Bohlen, and D. G. Uzarski. 2003. Influence of cattle grazing and pasture land use on macroinvertebrate communities in freshwater wetlands. Wetlands 23: 877-889 (pdf).
Shuster, W. D., M. J. Shipitalo, P. J. Bohlen, S. Subler, and C. A. Edwards. 2003. Population dynamics of ambient and altered earthworm communities in row-crop agroecosystems in the midwestern U.S. Pedobiologia 47: 825-829.
Bohlen, P. J., C. A. Edwards, Q. Zhang , R. W. Parmelee and M. Allen. 2002. Indirect effects of earthworms on microbial assimilation of labile carbon. Applied Soil Ecology 20: 255-261.
Li, X., M. C. Fisk, T. J. Fahey and P. J. Bohlen. 2002. Influence of earthworm invasion on soil microbial biomass and activity in a northern hardwood forest. Soil Biology & Biochemistry 34: 1929-1937.
Bohlen, P. J. 2002. Earthworms. In Encyclopedia of soil science, R. Lal (ed.), p. 370-373. Marcel Dekker, Inc., NY (pdf).
Hendrix, P. F. and P. J. Bohlen. 2002. Ecological risks of exotic earthworm invasions in North America. BioScience 52: 801-811 (pdf).
Bohlen, P. J., C. A. Edwards, Q. Zhang, R. W. Parmelee and M. Allen. 2002. Indirect effects of earthworms on microbial assimilation of labile carbon. Applied Soil Ecology 20: 255-261.
Bohlen, P. J., P. M. Groffman, C. T. Driscoll, T. J. Fahey and T. G. Siccama. 2001. Plant-soil-microbial interactions in a northern hardwood forest. Ecology 82: 965-978 (pdf).
Butt, K. R., M. J. Shipitalo, P. J. Bohlen, W. M. Edwards and R. W. Parmelee. 1999. Long-term trends in earthworm populations of cropped experimental watersheds in Ohio, USA. Pedobiologia 43: 713-719.
Bohlen, P. J., R. W. Parmelee, M. F. Allen and Q. M. Ketterings. 1999. Nitrogen uptake and redistribution by earthworms in soils treated with nitrogen-15-labeled potassium nitrate, rye litter or cow manure. Soil Science Society of America Journal 63:882-890 (pdf).
Groffman, P. M. and P. J. Bohlen. 1999. Soil and sediment biodiversity: Cross-system comparisons and large-scale effects. Bioscience 49:139-148 (pdf).
Arnone, J. A., III and P. J. Bohlen. 1998. Stimulated N2O flux from intact grassland monoliths after two growing seasons under elevated atmospheric CO2. Oecologia 116:331-335 (pdf).
Burtelow, A. E., P. J. Bohlen and P. M. Groffman. 1997. Influence of exotic earthworms on soil organic matter, microbial biomass and denitrification potential in forest soils of the northeastern United States. Applied Soil Ecology 9:197-202.
Bohlen, P. J., R. W. Parmelee, D. A. McCartney and C. A. Edwards. 1997. Effects of earthworms (Lumbricus terrestris) on the carbon and nitrogen dynamics of decomposing surface litter in corn agroecosystems. Ecological Applications 7:1341-1349 (pdf).
Research Grants and Contracts Top
Optimization of best management practices for beef cattle ranching in the Lake Okeechobee Basin. Contract No. C-13414, South Florida Water Management District. 2002-2004. $290,000.
Agro-ecosystem indicators of sustainability as affected by cattle density in ranch management systems.” USDA-NRI Agricultural Systems Program. F. Roka, P. Bohlen, J. Mullahey, J. Arthington, K. Campbell, S. Coleman, D. Graetz, R. McSorley, K. Portier, A. Steinman, G. Tanner, and M. Williams, co-p.i.’s. 2001-2004. $530,000.
Influence of cattle grazing and land use on freshwater wetlands in rangeland ecosystems. USDA-NRI Ecosystem Science Program. P. Bohlen (p.i.), D. A. Graetz and A. D. Steinman (co-p.i.'s). 2000-2002. $267,000.
Optimization of best management practices for beef cattle ranching in the Lake Okeechobee Basin. Contract No. C-8614, South Florida Water Management District. 1999-2001. $315,000.
Invasion of north temperate forests soils by exotic earthworms. NSF Ecosystems Program. P. Groffman (p.i.), P. Bohlen, T. Fahey (co-p.i.s). 1998-2001. $700,000.
The role of earthworms in conservation and loss of carbon and nitrogen in agroecosystems. National Science Foundation Ecosystems Program. R. Parmelee (p.i.), C. Edwards, B. Stinner, P. Groffman (co-p.i.s), P. Bohlen (co-author). 1995-1998. $640,000.
TopUniversity of Florida, Soil and Water Science Dept., Courtesy Assistant Professor, 1999-present.
Pam Ito, M.S., Bard College Graduate Program in Environmental Studies
Alissa Zimman, Cornell College, summer/fall 2002. Soil biology and sustainability of sod harvesting on south Florida cattle ranches.
Robin Rossmanith, Southern Illinois University, summer/fall 2002. Effects of grazing, land use and vegetation on soil invertebrate communities in subtropical grazing lands.
Julie Conklin, Rutgers University, fall/winter 2002. Aquatic macroinvertebrate communities in seasonal wetlands in improved and semi-native subtropical pastures.
Nicola Clegg, Napier University, summer 2001. Effect of land use on macroinvertebrate communities in drainage ditches of ranchlands in South Florida.
Julie Golod, Michigan State University, summer 2001. The impact of cattle grazing intensity on denitrification in poorly drained sandy soils.
Christine Edwards, University of Colorado, winter 2001. The influence of microclimate on vascular epiphyte distribution in live oak hammocks.
Wilhelmina Tsang, Brandeis University, summer 2000. Carbon storage and organic matter quality in sediments of seasonal wetlands influenced by grazing cattle.
Timothy Dickson, St. Olaf College, winter/spring 2000. Microbial nutrient dynamics in relation to cattle grazing and vegetation in subtropical rangelands.
Rachel Butzler, Penn State University, fall 1999. The effects of cattle ranching on algal productivity in seasonal wetlands.
Laura Spangler, Emory University, summer 1999. Influence of cattle ranching on nutrient characteristics of wetland sediments.
- Editorial Boards, Ecology and Ecological Monographs (2001-current); Applied Soil Ecology (1996-2001); Bulletin of Environmental Contamination and Toxicology (1994-current).
- Secretary, Soil Ecology Society, 2000-2002.
- National Science Foundation Panel Member: Ecology Program, Spring 2000, 2002; Doctoral Dissertation Improvement Awards Program 1999.
- National Science Foundation Ecology, Ecosystem or LTREB Program Reviewer, 1999, 2001, 2002.
- Invited Participant, USDA-ARS Rangeland, Pasture and Forages National Program Workshop, 1999.
- SEEDS Program Mentor, Ecological Society of America Annual Meeting, 1999.
- Marsden Fund Proposal Referee, The Royal Society of New Zealand, 1998, 2000, 2001.
- Heinz Center State
of the Nation’s Ecosystems Project Reviewer, 2001.
- Natural Environmental Research Council Proposal Referee, United Kingdom, 1998.
- Co-chair, 6th International Symposium on Earthworm Ecology, Vigo, Spain, 1998
- Nominating Committee, International Soil Ecology Society, 1997.
- Invited participant, Cary Conference VI and VII, Institute of Ecosystem Studies, 1995, 1997.
- Secretary of the Soil Ecology Section of the Ecological Society of America, 1995-1997.
- Invited workshop moderator, Ecological Society of America Annual Meeting, 1996.
- Contributed paper session chair, Ecological Society of America Annual Meeting, 1996.
- Invited Book Reviews: Applied Soil Ecology, Ecology, Soil Biology and Biochemistry
- Reviewer for Journal articles: Applied Soil Ecology, Biogeochemistry, Bulletin of Environmental Contamination and Toxicology, Ecology, Ecoscience, Environmental Engineering, Geoderma, Soil Biology and Biochemistry, Soil Science Society of America Journal.
URL: www.archbold-station.org/staff/pbohlen/pbohlen.htm