Hans Paerl

Hans Paerl

Distinguished Professor, IMS

(252) 726-6841, ext 133
(252) 726-2426
3431 Arendell Street, Morehead City, NC 28557

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Ph.D., University of California-Davis, 1973

Research Interests

Aquatic Microbial Ecology; Nutrient Cycling; Algal Blooms

Research and Activities

Hans W. Paerl is Kenan Professor of Marine and Environmental Sciences, at the UNC-Chapel Hill Institute of Marine Sciences, Morehead City. His research includes; microbially-mediated nutrient cycling and primary production dynamics of aquatic ecosystems, environmental controls of harmful algal blooms, and assessing the causes and consequences of man-made and climatic (storms, floods) nutrient enrichment and hydrologic alterations of inland, estuarine and coastal waters. His studies have identified the importance and ecological impacts of atmospheric nitrogen deposition as a new nitrogen source supporting estuarine and coastal eutrophication. He is involved in the development and application of microbial and biogeochemical indicators of aquatic ecosystem condition and change in response to human and climatic perturbations. Recent work has shown that global warming and intensification of major storms and droughts play major roles in the proliferation of toxic blue-green algal (cyanobacterial) blooms worldwide. He heads up the Neuse River Estuary Modeling and Monitoring Program, ModMon (http://paerllab.web.unc.edu/projects/modmon/) and ferry-based water quality monitoring program, FerryMon (http://paerllab.web.unc.edu/projects/ferrymon/), which employs environmental sensors and a various microbial indicators to assess near real-time ecological condition and change of the Pamlico Sound System, the USAs second largest estuarine complex. In 2003 he was awarded the G. Evelyn Hutchinson Award by the American Society of Limnology and Oceanography for his work in these fields and their application to interdisciplinary research, teaching and management of aquatic ecosystems. In 2011 he received the Odum Lifetime Achievement Award from the Estuarine and Coastal Research Federation for his work on the cause and consequences of eutrophication and harmful algal blooms in estuarine and coastal waters.

Major research projects underway include:

  • Determining, sources and roles of nutrients in eutrophication, algal bloom and food web dynamics of the Neuse River and New River Estuaries, Pamlico Sound and nearshore waters.
  • Deployment and environmental sensors and biological indicators on unattended platforms and ferries as ships of opportunity for assessing water quality and habitat condition in Norh Carolina estuaries (www.ferrymon.org)
  • Developing and deploying long term environmental monitoring and assessment programs for North Carolina Estuarine and coastal ecosystems (Neuse and New River Estuaries, Pamlico Sound)
  • Assessing the ecological effects of nutrient over-enrichment and developing nutrient management strategies to control eutrophication and harmful algal blooms in large lake and estuarine ecosystems in the US, China (Lake Taihu), Europe (e.g. Baltic Sea) and other regions.
  • Evaluating the interactive impacts and roles of human (nutrient) and climatic (storms, hurricanes, floods, droughts) perturbations on estuarine and coastal water quality and habitat condition.
  • Examining impacts of inorganic and organic nitrogen inputs from man-made and natural source on phytoplankton dynamics and eutrophication.
  • Determining environmental factors controlling blue-green algal (cyanobacterial) nitrogen fixation and bloom dynamics in lakes, rivers, estuarine and coastal ecosystems.

Other projects include the formation, function and microbiology of modern day stromatolites; the physical-chemical dynamics of cyanobacterial blooms in the Baltic Sea; and Antartic lake ice microbial consortia.

Dr. Paerl’s research is funded by NSF, NOAA, Sea Grant, EPA, North Carolina Dept. of Environment and Natural Resources, the NC Water Resources Research Institute, and the Department of Defense (Strategic Environmental Research Program). He heads the Institute of Marine Sciences’ Microbial Ecology/Nutrient Cycling Laboratory and holds a joint appointment in the Departments of Marine Science and Environmental Sciences and Engineering, and Dept. of Biology/Ecology Curriculum.

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