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Education
Ph.D. 1991, Oceanic Science, University of Michigan, Ann Arbor, Michigan
M.Sc. 1986, Oceanography, The Florida State University, Tallahassee, Florida
B.Sc. 1981, Biology, Michigan State University, East Lansing, Michigan
Dr. Johengen has been a Research Scientist with the Cooperative Institute for Limnology and Ecosystems Research at the University of Michigan since 1991. Dr. Johengen also served as the Director of the CILER between 2000 - 2004. He received his M.S. in Biological Oceanography from Florida State University in 1986 and his Ph.D. in Oceanic Science at the University of Michigan in 1991. He currently serves as the Chief Scientist for Alliance of Coastal Technologies, a national consortium of academic institutions promoting observing technology. He has recently served on several advisory boards and panels including the International Association for Great Lakes Research Board, the Great Lakes Aquatic Nuisance Species Panel, and the State of Michigan's Aquatic Nuisance Species Council. His research interests include nutrient cycling, ecological impacts of invasive species, ballast water management to mitigate the transfer of invasive species, and observing technologies for research and water resource management.
Current Grants
Sponsor: NOAA Great Lakes Environmental Research Lab
Title: NOBOB Salinity Tolerance (NOBOB-S): Eradicating aquatic nuisance species from the residual ballast water of NOBOB vessels using salt solutions
Principal Investigators: G. Ruiz, S. Santagata, T. Johengen and D. Reid
Period of Activity: May 2006 - Dec 2007
Sponsor: NOAA Great Lakes Environmental Research Lab
Title: Assessment of Coastwise Traffic Patterns and Management of Aquatic Nonindigenous Species Risk on NOBOBs and Coastwise Vessels of the Great Lakes and East Coast of the United States and Canada
Principal Investigators: G. Ruiz, S. Santagata, T. Johengen and D. Reid
Period of Activity: May 2006 - Dec 2007
Sponsor: NOAA Coastal Service Center
Title: Alliance for Coastal Technologies
Principal Investigators: T. Johengen and G. Meadows
Period of Activity: May 2003 - April 2008
Sponsor: NOAA Great Lakes Environmental Research Lab
Title: Nutrient dynamics and trophic conditions in association with Lake Erie Hypoxia
Principal Investigators: T. Johengen
Period of Activity: May 2005 - June 2008
Sponsor: US EPA Great Lakes National Program Office
Title: Great Lakes Biological Monitoring
Principal Investigators: D. Scavia, T. Johengen, M. Wiley, D. Jude, S. Adlerstien
Period of Activity: March 2007 - February 2012.
Sponsor: NOAA Coastal Services Center
Title: Adaptive Integrated Framework: a new methodology for managing impacts of multiple stressors in coastal ecosystems
Principal Investigators: C. Stow, S. Brandt , T. Croley II, J. Dyble, G. Fahnenstiel, T. Nalepa, S. Pothoven, H. Vanderploeg, S. Peacor, M. Kaplowitz, F. Lupi, T. Hook, D. Beletsky, C. De Marchi, T. Johengen, D. Kashian, P. Lavrentyev, J. Depinto, C. He, T. Newcomb, J. Bredin
Period of Activity: July 2007 - June 2012.
Sponsor: Great Lakes Fishery Trust
Title: Mapping the Condition of Diporeia: Insights into Mechanisms of Declines
Principal Investigators: M. Sepulveda, T. Hook, T. Nalepa, D. Fanslow, J. Adamec, J. Rinchard, K. Nichols, W. Stott, S. Pothoven, T. Johengen, D. Jude and M. Wiley
Period of Activity: January 2008 - January 2011.
Past Grant Activity
Sponsor: Great Lakes Protection Fund
Title: Identifying, Verifying, and Establishing Options for Best Management Practices for NOBOB Vessels
Prinicipal Investigators: T. Johengen, D. Reid, H. MacIsaac, F. Dobbs, M. Doblin, L. Drake, G. Ruiz and P. Jenkins
Period of Activity: April 2004 - December 2006.
Sponsor: U.S. Coast Guard
Title: NOBOB Best Management Practices ("NOBOB-B"): Enhanced Tank Instrumentation for Examining Sediment Behavior, and Great Lakes Ballast Operations Survey.
Prinicipal Investigators: T. Johengen and D. Reid
Period of Activity: July 2004 - May 2006
Sponsor: Great Lakes Protection Fund
Title: Assessment of Transoceanic NOBOB Vessels and Low-Salinity Ballast Water as Vectors for Non-indigenous Species Introductions to the Great Lakes.
Prinicipal Investigators: T. Johengen, D. Reid, G. Fahnenstiel, H. MacIsaac, F. Dobbs, M. Doblin, G. Ruiz and P. Jenkins
Period of Activity: November 1, 2002 - April 30, 2003
Content to come.
Johengen, T., B. Biddanda, and J. Cotner (In review). Stimulation of Lake Michigan plankton metabolism by sediment resuspension and river runoff. J. Great Lakes Research.
Santagata, S., Z.R. Gasi?naite, E.V., J.R. Cordell, K.E., J.S. Cohen, K.B, G. Quilez-Badia, T.H. Johengen, D.F. Reid, and G.M. Ruiz. (In review). Effect of osmotic shock as a management strategy to reduce transfers of non-indigenous species among low-salinity ports by ships. Mar. Ecol. Prog. Ser.
Fahnenstiel, G., Y. Hong, D. Millie, M. Doblin, D. Reid, T. Johengen (In review). Marine dinoflagellat cysts in the ballast tank sediments of ships entering the St. Lawrence Great Lakes. Verh. Internat. Verein. Limnol.,
Vanderploeg, H., T. Johengen, and J. Liebig (In review). Algal composition affects zebra mussel (Dreissena polymorpha) feeding and condition in Saginaw Bay and Lake Erie: Did the regime changer pay a price for its success? J. Plankton Res.
Bosch, N., T. Johengen, J.D. Allan, G.W. Kling (In review). The Influence of Impoundments on Riverine Nutrient Transport.
Gray, D.K., T.H. Johengen, D.F. Reid and H.J. MacIsaac (2007). Efficacy of open-ocean ballast water exchange as a means of preventing invertebrate invasions between freshwater ports. Limnology and Oceanography, 52(6).
Vanderploeg, H.A., Johengen, T.J., Lavrentyev, P.J., Chen, C., Lang, G.A., Agy, M.A., Bundy, M.A., Cavaletto, J.F., Eadie, B.J., Liebig, J.R., Miller, G.S., and S.A. Ruberg (2007). Anatomy of the recurrent coastal sediment plume in Lake Michigan and its impacts to light climate, nutrients, and plankton. Journal of Geophysical Research, 112, C03S90, doi:10.1029/2004JC002379.
Hawley, N., T. Johengen, Y. Rao, S. Ruberg, D. Beletsky, S. Ludsin, B. Eadie, D. Schwab, T. Croley, and S. Brandt (2007). Hypoxia in Lake Erie and The International Field Years for Lake Erie (IFYLE). EOS Transactions.
Biddanda, B. A., D. F. Coleman, T. H. Johengen, S. A. Ruberg, G. A. Meadows, H. W. VanSumeren, R. R. Rediske and S. T. Kendall (2006). Exploration of a submerged sinkhole environment in Lake Huron. Ecosystems, 9: 828-842.
Ruberg, S.A., D.F. Coleman, T.H. Johengen, G.A. Meadows, H.W. Van Sumeren, G.A. Lang, B.A. Biddanda (2005). Groundwater Plume Mapping in a Submerged Sinkhole in Lake Huron. Marine Technology Series, 39(2):65-69.
Bailey, S., I. Duggan, K. Nandakumar, I.C. Duggan, C.D.A. van Overdijk, T.H. Johengen, D.F. Reid, and H.J. MacIsaac (2005). In situ hatching of invertebrate diapausing eggs from ship' ballast sediment. Biodiversity Research, Diversity Distrib., 11:453-460.
Chen, C., L. Wang, J. Qi, H. Liu, J. W. Budd, D. J. Schwab, D. Beletsky, H. A. Vanderploeg, B. J. Eadie, T. H. Johengen, J. Cotner, and P. J. Lavrentyev (2004). A modeling study of benthic detritus flux's impacts on heterotrophic processes in Lake Michigan. J. Geophysical Research 109(C10S11):13.
Nassauer, J.I., J. D. Allan, T. Johengen, S. Kosek, and D. Infante (2004). Exurban Residential Subdivision Development: Effects on Water Quality and Public Perception. Urban Ecosystems, 7(3): 267-291.
Lohrenz, S. E, G.L. Fahnenstiel, D.F. Millie, O.M. Schofield, T.H. Johengen and T. Bergmann. (2004). Spring phytoplankton photosynthesis, growth and primary production and relationships to a recurrent coastal sediment plume and river inputs in southeastern Lake Michigan. J. Geophysical Research, 109:C10S14.
Gardner, W.S., P. Lavrentyev, J. Cavaletto, M. McCarthy, B. Eadie, T. Johengen, and J. Cotner (2004). Distribution and dynamics of nitrogen and microbial plankton in southern Lake Michigan during spring transition 1999-2000. J. Geophysical Research, 109:C03007.
Bailey, S., I. Duggan, C. van Overdijk, T. Johengen, D. Reid, and H. MacIsaac (2004). Salinity Tolerance of Diapausing eggs of freshwater zooplankton. Freshwater Biology, 49(3):286-295.
Millie, D. F., Fahnenstiel, G. L., Lohrenz, S. E., Carrick, H. J., Johengen, T. H., & Schofield, O. (2003). Physical-biological coupling in southern Lake Michigan: influence of episodic resuspension on phytoplankton. Aquatic Ecology, 37: 393-408.
Madenjian, C., G. Fahnenstiel, T. Johengen, T. Nalepa, H. Vanderploeg, G. Fleischer, P. Schneeberger, D. Benjamin, E. Smith, J. Bence, E. Rutherford, D. Lavis, D. Robertson, D. Jude, and M. Ebener (2002). Dynamics of the Lake Michigan food web, 1970-200. Can. J. Fish. Aquatic Science, 59:736-753.
Chen, C., R. Ji, D.J. Schwab, D. Beletsky, G.L. Fahnenstiel, M. Jiang, T.H. Johengen, H. Vanderploeg, B. Eadie, J.W. Budd, M.H. Bundy, W. Gardner, J. Cotner, and P.J. Lavrentyev (2002). A model study of the coupled biological and physical dynamics in Lake Michigan. Ecol. Modeling, 152:145-168
Ji, R., C. Chen, J.W. Budd, D.J. Schwab, D. Beletsky, G.L. Fahnenstiel, T.H. Johengen, H. Vanderploeg, B. Eadie, J. Cotner, W. Gardner, and M.H. Bundy (2002). Influences of suspended sediments on the ecosystem in Lake Michigan: a 3-D coupled bio-physical modeling experiment. Ecol. Modeling, 152:169-190.
Eadie, B., D. Schwab, T. Johengen, P. Lavrentyev, G. Miller, R. Holland, G. Leshkevich, M. Lansing, N. Morehead, J. Robbins, N. Hawley, D. Edgington, and P. Van Hoof (2002). Particle transport, nutrient cycling, and algal community structure associated with a major winter-spring resuspension even in southern Lake Michigan. J. Great Lakes Res., 28(3):324-337.
Vanderploeg, H.A., J.R. Liebig, W.W. Carmichael, M.A. Agy, T.H. Johengen, G.L. Fahnenstiel, and T.F. Nalepa (2001). Zebra mussel (Dreissena polymorpha) selective filtration as a mechanism of Microcystis bloom promotion in Saginaw Bay (Lake Huron) and Lake Erie. Can. J. Fish Aquatic. Science, 58: 1208-1221.
Gardner, W.S., L.Yang, J.B. Cotner, T.H. Johengen, and P. J. Lavrentyev (2001). Nitrogen dynamics in sandy freshwater sediments (Saginaw Bay, Lake Huron). J. Great Lakes Res, 27(1):84-97.
Fanslow, D.L., T.F. Nalepa, and T.H. Johengen (2001). Seasonal changes in the respiratory electron transport system (ETS) and respiration of the zebra mussel, Dreissena polymorpha in Saginaw Bay, Lake Huron. Hydrobiologia, 448: 61-70.
Cotner, J.B., T.H. Johengen, and B.A. Biddanda (2000). Intense winter heterotrophic production stimulated by benthic resuspension. Limnol. Oceanogr. 45:1672-1676.
Cotner, J.B., R.H. Sada, H. Bootsma, T.H. Johengen, J.F. Cavaletto, and W.S. Gardner (2000). Nutrient limitation of heterotrophic bacteria in Florida Bay. Estuaries, 23(5):611-620.
Nalepa, T., G. Fahnenstiel, and T. Johengen (1999). Impacts of the Zebra Mussel (Dreissena polymorpha) on Water Quality: A Case Study in Saginaw Bay, Lake Huron. In, R. Claudi & J. Leach (Eds), Non-indigenous Freshwater Organisms in North America; their biology and impacts. CRC Press LLC, p255-271.
Lavrentyev, P.J., H.A. Bootsma, T.H. Johengen, J.F. Cavaletto, and W.S. Gardner (1998). Microbial plankton response to resource limitation: insights from the community structure and seston stoichiometry in Florida Bay. Marine Ecol. Prog. Series, 165: 45-57.
Tomaszek, J., W. Gardner, and T. Johengen (1997). Denitrification in sediments of a Lake Erie coastal wetland (Old Woman Creek, Huron, Ohio). J. Great Lakes Research, 23: 403-415.
Eadie, B., D. Schwab, G. Leshkevich, T. Johengen, R. Assel, N. Hawley, R. Holland, M. Lansing, P. Lavrentyev, G. Miller, N. Morehead, J. Robbins, and P. Van Hoof (1996). Recurrent Coastal Plume in southern Lake Michigan. EOS, Trans., AGU, 77:337-338.
Johengen, T., T. Nalepa, G. Fahnenstiel, and G. Goudy (1995). Nutrient changes in Saginaw Bay, Lake Huron after the establishment of the zebra mussel Dreissena polymorpha. J. Great Lakes Research, 21: 449-464.
Gardner, W., J. Cavaletto, T. Johengen, J. Johnson, R. Heath, and J. Cotner (1995). Effects of the zebra mussel (Dreissena polymorpha) on community nitrogen dynamics in Saginaw Bay, Lake Huron. J. Great Lakes Research, 21: 529-544.
Fahnenstiel, G., G. Lang, T. Nalepa and T. Johengen (1995). Effects of the zebra mussel (Dreissena polymorpha) colonization on water quality parameters in Saginaw Bay, Lake Huron. J. Great Lakes Research, 21: 435-448.
Holland, R., T. Johengen, and A. Beeton (1995). Trends in nutrient concentrations in Hatchery Bay, Bass Island area, western Lake Erie before and after Dreissena polymorpha. Canadian J. Fisheries and Aquatic Sciences, 52: 1202-1209.
Johengen, T., O. Johannsson, G. Pernie, and E. Millard (1994). Temporal and seasonal trends in nutrient dynamics and biomass measures in lakes Michigan and Ontario in response to phosphorus control. Canadian J. Fisheries and Aquatic Sciences, 51: 2570-2578.
Johengen, T. and P. LaRock (1993). Quantifying nutrient removal processes within a constructed wetland designed to treat urban stormwater runoff. J. Ecological Engineering, 2: 347-366.
Moll, R., T. Johengen, A. Bratkovich, J. Saylor, G. Meadows, L. Meadows, and G. Pernie (1993). Vernal thermal fronts in large lakes: A case study from Lake Michigan. Verh. Internat. Verein. Limnol., 25: 65-68.
Johengen, T., A. Beeton, and D. Rice (1989). Evaluating the effectiveness of best management practices to reduce agricultural nonpoint source pollution. Journal of Lake & Reservoir Management, 5: 63-70.
Other Publications
Johengen, T.H., D.F. Reid, Assessment of Transoceanic Final Report to the Great Lakes Protection Fund, March 2005. 285pp.
D. Allan, T. Johengen, and E. Rutherford. 2002. Nutrient Loading and its Relevance to the Great Lakes Basin. A White Paper prepared for a University of Michigan Initiative in Great Lakes Research.
D. Jude, E. Stoermer, T. Johengen, and T. Perakis. 2002. Non-indigenous species in the Great Lakes: Ecology, interactions, impacts and future research directions. A White Paper prepared for a University of Michigan Initiative in Great Lakes Research.
Johengen, T. H., T. F. Nalepa, G. A. Lang, D. L. Fanslow, H. A. Vanderploeg, and M. A. Agy (2000). Physical and chemical variables of Saginaw Bay, Lake Huron in 1994-1996. NOAA Technical Memorandum GLERL-115, Great Lakes Environmental Research Laboratory, Ann Arbor, MI, NTIS# PB2000-102421/XAB, 39 pp.
Nalepa, T.F., G.L. Fahnenstiel, M.J. McCormick, T.H., Johengen, G. A. Lang, J.F. Cavaletto, and G. Goudy (1966). Physical and chemical variables of Saginaw Bay, Lake Huron in 1991-1993. NOAA Technical Memorandum GLERL-91, Great Lakes Environmental Research Laboratory, Ann Arbor, MI, 78 pp.
Johengen, T.H. (1991). PhD. Dissertation, Department of Atmospheric and Oceanic Sciences, University of Michigan, Ann Arbor, MI.
Johengen, T.H. (1987). M.Sc. Thesis, Department of Oceanography, Florida State University, Tallahassee, FL.
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