Ken Krieger served as Acting Director of the National Center for Water Quality Research (NCWQR) from April through June 2010 and as Director from July 2010 until his retirement in December 2015. Dr. Krieger continues to assist with NCWQR projects on a limited basis. As a biologist and ecologist in the NCWQR since 1978, he conducted research on wide-ranging topics including (1) the population and community ecology and indicator status of invertebrates in Lake Erie, its coastal marshes, and tributaries; (2) dynamics of nearshore hypoxia (oxygen depletion) in the central basin of Lake Erie and the influence of hypoxia on the structure of benthic invertebrate communities; (3) the influence of agricultural ditch maintenance and land-use practices on macroinvertebrate community structure, diversity and abundance of headwater stream systems; and (4) the role of coastal wetlands in mitigating concentrations and loads of phosphorus, nitrogen, sediment and pesticides from tributaries.
Dr. Krieger’s more-recent projects were sponsored by 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 scientists, have been published in the Journal of Great Lakes Research, Journal of Aquatic Ecosystem Stress and Recovery, Ecological Applications, Harmful Algae, Archives of Environmental Contamination and Toxicology, Chemistry and Ecology, and Wetlands. Dr. Krieger served on the editorial boards of the Ohio Journal of Science, Journal of Great Lakes Research, and Wetlands Ecology and Management, and he continues to serve as a peer reviewer of manuscripts and research proposals. He also remains on the science advisory board of the University of Toledo’s Lake Erie Center and on the Sandusky Scenic River advisor council.
From 1978 through 2014, Dr. Krieger taught courses in freshwater ecology, limnology (the study of inland waters) and water pollution biology at Heidelberg University. Eleven summers from 1989 through 2002, he taught or team-taught the graduate course in limnology at Ohio State University’s Franz Theodore Stone Laboratory on Gibraltar Island in Lake Erie. He also conducted workshops for university and agency staff, students, and volunteers on methods of habitat assessment, stream quality monitoring using macroinvertebrates, and oligochaete worm identification. Dr. Krieger had the highest level (Level 3) of certification from Ohio EPA as a Qualified Data Collector (QDC) for stream macroinvertebrates and stream habitat assessment (QHEI), and is approved by OEPA as a trainer for Level 1 QDCs. Ken was honored with a 2015 Outstanding Service Award from the Sandusky River Watershed Coalition. He also received the 2016 Hero Award from the Friends of Old Woman Creek in recognition of his many years of research and service at the National Estuarine Research Reserve site.