UCF Biology

Patrick Bohlen

  • Professor, Director-Landscape and Natural Resources and Arboretum
  • patrick.bohlen@ucf.edu
  • 407-823-1940
  • Biological Sciences, BIO407, Facilities and Safety 161E

Research Area(s): Current research interests in ecosystem ecology; urban ecology; ecology and valuation of urban green space; wetland ecosystem services


I have a diverse research background that started with training in soil and ecosystem ecology. I spent many years researching the effects of earthworms on nutrient cycling in a variety of ecosystems. Earthworms provided an excellent model organism for examining the effects of animals on ecosystem processes.  I used this model to examine the effects of earthworms on retention and loss of carbon and nitrogen from agro-ecosystems, and the effect of species invasions on nutrient cycling in northern forests. From 1998-2010, I was Director of Archbold Biological Station’s MacArthur Agro-ecology Research Center in south Florida. There my research expanded to include wetland ecology, water quality, and agro-ecosystem sustainability.

I have a long standing interest in the ecology and management of human-dominated ecosystems, which is reflected in my past experience directing an agro-ecology program, and my current experience directing a program in urban landscape and natural resource management.  The fields that best encompass my current interests are urban ecology and wetland ecology. Urban ecology is an interdisciplinary field that focuses on urban ecosystems, urbanizing landscapes, and the impacts of urban areas on ecological patterns and processes at local, regional and global scales. Researchers in this field try to understand complex interactions between human and natural systems in urban environments and apply that understanding to developing more resilient and sustainable systems. I am particularly interested in the role of wetlands in urban areas and the impact of urbanization on wetlands and water systems.


  • McDonnell, M. J., S. T. A. Pickett, R. V. Pouyat, R. W. Parmelee, M. Carreiro, P. Groffman, P. Bohlen, W. C. Zipperer and K. Medley.  1997.  Ecosystem processes along urban-to-rural gradients.  Urban Ecosystems 1: 21-36.
  • Groffman, P. M. and P. J. Bohlen.  1999.  Soil and sediment biodiversity: Cross-system comparisons and large-scale effects.  Bioscience 49: 139-148.
  • Bohlen, P. J., R. W. Parmelee, M. F. Allen and Q. M. Ketterings.  1999.  Differential effects of earthworms on nitrogen cycling from various nitrogen-15-labeled substrates.  Soil Science Society of America Journal 63: 882-890.
  • 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.
  • 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.
  • 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.
  • Domínguez, J., P. J. Bohlen and R. W. Parmelee.  2004.  Earthworms increase nitrogen leaching to greater soil depths in row crop agroecosystems.  Ecosystems 7: 672-685.
  • Bohlen, P. J., S. Scheu, C. M. Hale, M. A. McLean, S. Migge, P. M. Groffman and D. Parkinson.  2004.  Non-native invasive earthworms as agents of change in north temperate forests. Frontiers in Ecology and the Environment 2: 427-435.
  • Gathumbi, S. M, P. J. Bohlen and D. A. Graetz.  2005.  Nutrient enrichment of wetland plants and sediments in subtropical pastures.  Soil Science Society of America Journal 69: 539-548.
  • Bohlen, P. J.  2006.  Biological invasions: linking the aboveground and belowground consequences. Applied Soil Ecology 32: 1-5.
  • Bohlen, P. J. and S. M. Gathumbi.  2007.  Nitrogen cycling in seasonal wetlands in subtropical cattle pastures.  Soil Science Society of America Journal 71: 1058-1065.
  • Swain, H. M., P. J. Bohlen, K. L. Campbell, L. O. Lollis and A. D. Steinman.  2007.  Integrated ecological and economic analysis of ranch management systems; an example from south central Florida.  Rangeland Ecology and Management 60: 1-11.
  • Tweel, A. W. and P. J. Bohlen.  2008.  Influence of soft rush (Juncus effusus) on phosphorus flux in grazed seasonal wetlands.  Ecological Engineering 33: 242-251.
  • Bohlen, P. J., S. Lynch, L. Shabman, M. Clark, S. Shukla and H. Swain.  2009.  Paying for ecosystem services on agricultural lands: an example from the Northern Everglades. Frontiers in Ecology and the Environment7: 46-55.
  • Boughton, E., P. Quintana-Ascencio, D. Nickerson, P. J. Bohlen.  2011.  Management intensity affects the relationship between non-native and native species in subtropical wetlands.  Applied Vegetation Science 14: 210-220.
  • Boughton, E. H., P. F. Quintana-Ascencio, P. J. Bohlen.  2011.  Refuge effects of Juncus effusus in grazed, subtropical wetland plant communities.  Plant Ecology 212: 451-460.
  • Bohlen, P. J. and R. Villapando.  2011. Differential effects of water retention on nutrient runoff from subtropical pastures. Journal of Environmental Quality 40: 989-998.


  • Edwards, C. A. and P. J. Bohlen.  1996.  Biology and ecology of earthworms.  Chapman and Hall, London, U.K., 426 pp.
  • Bohlen, P. J. and G. J. House (eds.).  2009.  Sustainable agroecosystem management: integrating, ecology, economics and society.  CRC Press, Taylor and Francis Group, Advances in Agroecology Series, Boca Raton, FL, 301 pp.


American Association for the Advancement of Science

American Institute of Biological Sciences

American Society of Agronomy, Soil Science Society of America

Ecological Society of America

Society of Wetland Scientists

Society for Ecological Restoration International

Office hours are available by appointment only. Please contact to schedule an appointment.


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