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  • Carrick, H.J.  2011. Niche modeling and predictions of algal blooming in aquatic ecosystems.  Journal of Phycology 47: 709-713.
  • Lashaway, A.R., and H.J. Carrick.  2010.  Effects of Light, Temperature, and Habitat Quality on Meroplanktonic Diatom Rejuvenation in Lake Erie: Implications for Seasonal Hypoxia. Journal of Plankton Research, 32: 479-490.
  • Godwin, C.E., M.E. Arthur, and H.J. Carrick. 2009. Periphyton nutrient status in a temperate stream with mixed land-uses: Implications for watershed nitrogen storage.Hydrobiologia 623:141-152.
  • Rohr, J.R., A.M. Schotthoefer, T.R. Raffel, H.J. Carrick, J.T. Hoverman, C.M. Johnson, L.B. Johnson, C. Lieske, M.D. Piwoni, P.K. Schoff, and V.R. Beasley. 2008. Agrochemicals increase exposure and susceptibility to trematode infections in a declining amphibian. Nature. 455: 1235-1240.
  • Carrick, H.J., C.M. Godwin, M. Johnston-Greenwald, C. Rilk, A. Siefert, and C.J. Tzilkowski.  2007. Evaluation of water quality in a spring fed stream (Spring Creek, Pennsylvania) based upon benthic algae and macroinvertebrates. Journal of the Pennsylvania Academy of Sciences. 80: 71-78.
  • Moon, J.B., and H.J. Carrick. 2007. Seasonal succession of phytoplankton nutrient limitation in the central basin of Lake Erie. Aquatic Microbial Ecology. 48: 61-71.
  • Carrick, H.J. 2005. Under-appreciated aspects of biodiversity in planktonic communities: The role of protozoa in Lake Michigan (A case study). Hydrobiologia. 551: 17-32.
  • Carrick, H.J, J.B. Moon, and G.F. Gaylord. 2005. Phytoplankton dynamics and hypoxia in Lake Erie: Evidence for benthic-pelagic coupling in the central basin. In revision-- Journal of Great Lakes Research. 31: 111-124.
  • Post-Doctoral-Fellow, Department of Fisheries and Aquatic Sciences, The University of Florida, 1991-1993.
  • Ph.D., Aquatic Ecology, The University of Michigan, Ann Arbor, Michigan, 1987-1990
  • M.S., Aquatic Ecology, Bowling Green State University, Ohio, 1983-1995
  • B.A., Biological Sciences (Minor in Botany), The State University of New York at Binghamton, 1983
My research investigates how human activities alter water, and ultimately how this influences the health and biogeochemistry of natural ecosystems (nutrient cycling, productivity, gas exchange). Given the swift turnover and transformation of many chemical contaminants in water, strict measurements on these quantities by themselves can yield an incomplete (or possibly misleading) picture of environmental quality. Microbes often dominate material transfer in natural ecosystems (e.g., productivity, decomposition) and respond swiftly to environmental conditions, making them early-warning indicators of system change. As such, these biochemical links serve as analogues for more complex biochemical systems that are often difficult to study.

Specific areas of research interest include:
  • Ecology of freshwater protists
  • Role of phytoplankton and microzooplankton in aquatic food webs
  • Nutrient limitation in aquatic in streams and lakes
  • Causes and consequences of hypoxia in large lakes
  • Developing biogeochemical metrics to set nutrient load limits for aquatic ecosystems