Experience:
As a biologist and aquatic ecologist in the National Center for Water Quality Research since 1978, Ken conducts research on the population and community ecology of invertebrates in Lake Erie, its coastal wetlands, and tributaries including the Sandusky and Olentangy river systems and Old Woman Creek. Current projects involve:
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assessment of recovery of invertebrate communities following removal of a low-head dam on the Sandusky River, in conjunction with other researchers who investigated impacts on the river geology, hydrology, and fish communities.
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impact of over-wide ditch construction on invertebrate community structure and function in agricultural headwater streams.
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extent of recovery of aquatic invertebrate communities in agricultural ditches and headwater streams over varying periods of time since last maintenance (“dip-out”), and relationship of recovery to habitat and water chemistry variables.
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development of photo atlases of selected invertebrate groups, including midges, mayflies, caddisflies, dragonflies, oligochaete worms, and crustacean zooplankton, for use by scientists and naturalists.
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dynamics of nearshore hypoxia (oxygen depletion) in the central basin of Lake Erie and the influence of hypoxia on establishment of burrowing mayflies (Hexagenia) and other “clean water” invertebrates in the central basin.
Recent funding for Dr. Krieger’s projects has come from the U.S. Army Corps of Engineers, the Ohio Lake Erie Protection Fund, the Ohio Sea Grant College Program, the National Estuarine Research Reserve Program (NOAA), USEPA, and Ontario Ministry of the Environment. His findings, often in collaboration with other biologists, have been published in journals including the Journal of Great Lakes Research, Journal of Aquatic Ecosystem Stress and Recovery, Ecological Applications, and Wetlands.
Dr. Krieger has served on the editorial boards of the Ohio Journal of Science, Journal of Great Lakes Research, and (currently) Wetlands Ecology and Management, and reviews manuscripts, research proposals, and graduate fellowship applications for numerous peer-reviewed journals and funding agencies. He is a member of the Great Lakes Aquatic Ecosystem Research Consortium and various professional societies.
Dr. Krieger teaches courses in limnology and water pollution biology at Heidelberg College. Eleven summers from 1989 through 2002, he taught or team-taught the graduate limnology class at Ohio State University’s Franz Theodore Stone Laboratory on Gibraltar Island in Lake Erie. He also conducts numerous workshops for agency personnel and volunteers on the taxonomy of aquatic macroinvertebrates and methods of stream quality monitoring using macroinvertebrates. He has the highest level of certification from Ohio EPA as a Qualified Data Collector for stream macroinvertebrates and stream habitat assessment. |
Publications
Reports
Keller, T. S., and K. A. Krieger. 2009. Taxonomic atlas of the caddisfly larvae (Class Insecta: Order Trichoptera) recorded at the Old Woman Creek National Estuarine Research Reserve and State Nature Preserve, Ohio. Final report to Ohio Department of Natural Resources, Division of Wildlife, Columbus. View OWC Trichoptera Atlas Final (pdf)
Krieger, K. A., and M. T. Bur. 2009. Nearshore hypoxia as a new Lake Erie metric. Final Report to Ohio Lake Erie Commission. View LEPF SG 334-07 Heidelberg Final Report (.pdf)
Stearns, A. M., and K. A. Krieger. 2008. Atlas of the aquatic and semiaquatic true bugs (Class Insecta: Order Hemiptera) recorded at the Old Woman Creek National Estuarine Research Reserve and State Nature Preserve, Ohio. Final Report to Ohio Dept. Natural Resources, Division of Wildlife. View OWC Hemiptera Atlas - Jan 2008 (.pdf)
Krieger, K. A., and A. M. Stearns. 2008. A baseline study of macroinvertebrate communities of McKibben Ditch and Riffle Creek (Olentangy River Watershed) prior to over-wide ditch construction. Final report to Ohio Dept. Natural Resources, Division of Soil & Water Conservation. View Olentangy Inverts Final Report May 2008 (.pdf)
Krieger, K. A., and A. M. Stearns. 2007. Response of the macroinvertebrate community of the Sandusky River in Seneca and Wyandot counties, Ohio, to removal of the St. Johns Dam. Final Report to Scenic Rivers Program, Division of Natural Areas & Preserves, Ohio Dept. Natural Resources. View Revised Invertebrate Report St Johns Dam December 2007 (.pdf)
Journal Articles
Rinta-Kanto, J. M., M. A. Saxton, J. M. DeBruyn, J. L. Smith, C. H. Marvin, K. A. Krieger, G. S. Sayler, G. L. Boyer, and S. W. Wilhelm. 2009. The diversity and distribution of toxigenic Microcystis spp. in present day and archived pelagic and sediment samples from Lake Erie. Harmful Algae 8:385-394.
Krieger, K. A., M. T. Bur, J. J. H. Ciborowski, D. R. Barton, and D. W. Schloesser. 2007. Distribution and abundance of burrowing mayflies (Hexagenia spp.) in Lake Erie, 1997-2005. Journal of Great Lakes Research 33 (Supplement 1):20-33.
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