My research focuses on trade-offs and complementarities between renewable energy production and other ecosystem services. For hydropower, I am interested in re-designing river basins to produce energy while protecting aquatic biota. We use models to understand responses of riverine fishes to modifications to flow, temperature (climate change), hatcheries, passage and non-volitional connectivity. For bioenergy, we develop guidance for managing biomass crops and forests to increase biomass, improve water quality, and protect biodiversity.
Distinguished Scientific Achievement (Auerbach) Award, Environmental Sciences Division, ORNL (2006)
DOE Outstanding Mentor Award (2006)
Natn’l Inst. of Mathematical & Biological Synthesis, Senior Personnel
Bredesen Center for Energy Research, University of Tennessee @ Knoxville
Joint Faculty Associate, Ecology & Evolutionary Biology, University of Tennessee @ Knoxville
Center for Bioenergy Sustainability
Climate Change Science Institute
President-elect, Water Quality Section of the American Fisheries Society
Editorial Advisory Board, Ecological Complexity
2017-2020. Ecosystem Service Portfolios of Agricultural and Forested Biomass Production Systems. DOE Bioenergy Technologies Office. Primary tasks include (1) Decision support to design forest treatments to benefit three ESA-listed salmonids in the Wenatchee basin; (2) Spatial optimization of Iowa fuelsheds to benefit pheasant and other wildlife.
2016-2018. Model-guided conservation planning for fall Chinook salmon in the Middle Snake River. Idaho Power Company
2014-2017. Model-guided conservation planning for white sturgeon in the Middle Snake River. Idaho Power Company
2009-2017. Forecasting water quality and biodiversity, DOE Bioenergy Technologies Office Sustainability program.
Jager HI and RA Efroymson. In press, 2017. Can Upstream Biofuel Production Increase the Flow of Downstream Ecosystem Goods and Services?. Special Issue: Bioenergy and Ecosystem Services in Biomass and Bioenergy.
Ferguson, Jake; Reichert, Brian ; Fletcher, Jr., Robert; Jager, H. In press, 2017. Detecting population-environmental interactions with mismatched time series data. Ecology.
Forbes VE, Salice CJ, Birnir B, Bruins RJF, Calow P, Ducrot V, Galic N,Garber K, Harvey BC, Jager HI, Kanarek A, Pastorok R, Railsback SF, Rebarber R, Thorbek P. 2017. A framework for predicting impacts on ecosystem services from (sub)organismal responses to chemicals. Environmental Toxicology and Chemistry 36(4).
McManamay, RA, SK Brewer, HI Jager, M Troia. 2016. Organizing environmental flow frameworks to meet hydropower mitigation needs. Environmental Management 58(3): 365-385.
Jager, HI, MJ Parsley, JJ Cech, Jr., RL McLaughlin, PS Forsythe, RF Elliott, and BM Pracheill. 2016. Reconnecting fragmented sturgeon populations in North American rivers. Fisheries 41(3), 140-148.
Jager, HI, RA Efroymson, JJ Opperman, and MR Kelly. 2015. Spatial design principles for sustainable hydropower development in river basins. Renewable and Sustainable Energy Reviews 45: 808-816.
Jager, HI, LM Baskaran, PE Schweizer, A Turhollow, CC Brandt, and R Srinivasan. 2015. Forecasting changes in water quality in rivers associated with growing biofuels in the Arkansas-White-Red river drainage, USA. Global Change Biology:Bioenergy 7(4): 774-784.
Jager, HI and RA McManamay. 2014. Comment on ‘‘Cumulative biophysical impact of small and large hydropower development in Nu River, China’’ by Kelly Kibler and Desiree Tullos. Water Resources Research 50, 758–759.
Jager, HI. 2014. Thinking outside the channel: Timing pulse flows to benefit salmon via indirect pathways. Ecological Modelling 273: 117-127.
McManamay, RA, DJ Orth, & HI Jager. 2014. Accounting for variation in species detection in fish community monitoring. Fisheries Management and Ecology 21, 96–112.
Ridley, CE, HI Jager, RA. Efroymson, C Kwit, DA. Landis, ZH Leggett, DA Miller, CM Clark. 2013. Debate: Can bioenergy be
produced in a sustainable manner that protects biodiversity and avoids the risk of invaders? Ecological Society of America Bulletin 94(3): 277-290.
Jager, HI, DL Peterson, D Farrae, & MS Bevelhimer. 2013. A population model to assess influences on the viability of the shortnose sturgeon (Acipenser brevirostrum) population in the Ogeechee River, Georgia. Transactions of the American Fisheries Society 142(3): 731-746.
Schweizer P & HI Jager. 2011. Modeling fish diversity in the Arkansas-Red-White River Basin. Transactions of the American Fisheries Society 140(5): 1227-1239. (http://dx.doi.org/10.1080/00028487.2011.618354)
Jager, HI, MS Bevelhimer, RL King, & KA Smith. 2011. Landscape influences on headwater streams on Fort Stewart, Georgia, USA. Environmental Management 4:795-807 (http://dx.doi.org/10.1007/s00267-011-9722-4)
Perkins TA & HI Jager. 2011. A conditional strategy model accounts for spatiotemporal life history variation in Snake River fall Chinook salmon. Transactions of the American Fisheries Society 140(4): 959-972.
McBride AC, VH Dale, LM Baskaran, ME Downing, LM Eaton, RA Efroymson, CT Garten Jr, KL Kline, HI Jager, PJ Mulholland, ES Parish, PE Schweizer,& J.M. Storey. 2011. Indicators to support environmental sustainability of bioenergy systems. Ecological Indicators 11(5): 1277-1289.
Jager HI, KB Lepla, W Van Winkle, BA James, & SO McAdams. 2010. The elusive minimum viable population size for white sturgeon. Transactions of the American Fisheries Society 139: 1551-1565.
Baskaran, LM, HI Jager, PE Schweizer & R Srinivasan. 2010. Progress toward evaluating the sustainability of switchgrass production at a regional scale. American Society of Agricultural and Biological Engineers 53(5): 1547-1556.
Jager HI, LM Baskaran, CC Brandt, EB Davis, CA Gunderson & SD Wullschleger. 2010. Empirical geographic modeling of switchgrass yields in the United States. Global Change Biology: Bioenergy 2(5): 248-257.
Efroymson RA, HI Jager, VH Dale, J Westerveld. 2009. A framework for developing management goals for species at risk and application to military installations in the United States. Environmental Management 44(6): 1163-1179.
McCullough, DA, JM Bartholow, HI Jager and others. 2009. Research in thermal biology: Burning questions for coldwater stream fishes. Reviews in Fisheries Science 17(1): 90-115.
Jager HI, KA. Rose & A Vila‐Gispert. 2008. Life history correlates and extinction risk of capital breeding fishes. Pages 15‐25 In Fish and Diadromy in Europe. Proceedings of the symposium held 29 March‐1 April, 2005, Bordeaux, France, Dufour, Prevost, Rochard, and Williot (eds.). Springer, Amsterdam.
Jager HI, MS Bevelhimer, KA Lepla, JB Chandler, & W Van Winkle. 2007. Evaluation of Reconnection Options for White Sturgeon in the Snake River Using a Population Viability Model. Pages 319‐335 In Proceedings of the Symposium on Anadromous Sturgeons. J.F. Munro et al., ed., American Fisheries Society Symposium 56, American Fisheries Society, Bethesda, MD.
Efroymson RA, HI Jager, & W Hargrove. 2010. Valuing wildlands. Pages 157‐185 In Environmental Risk Assessment and Management from a Landscape Perspective, L Kapustka, W Landis, and A Johnson (editors). John Wiley & Sons.
Van Winkle W, BD Holcomb, HI Jager, JA Tyler, SY Whitaker & BJ Shuter. 1995. Regulation of energy acquisition and allocation to respiration, growth, and reproduction: simulation model and example using rainbow trout. IN RC Chambers and EA Trippel, (eds.), Early Life History and Recruitment in Fish Populations, Chapman and Hall.
Jager HI, KA Rose, & A Vila-Gispert. 2008. Life history correlates and extinction risk of capital-breeding fishes. Hydrobiologia 602: 15-25.
Jager HI & BT Smith. 2008. Sustainable Reservoir Operation: Can we generate hydropower and preserve ecosystem values? River Research and Applications 24: 340-352.
Jager HI & MS Bevelhimer. 2007. How run-of-river operation affects hydropower generation. Journal of Environmental Management 40: 1004-1015.
Jager HI 2006. Chutes and ladders and other games we play with rivers: I. Simulated effects of upstream passage on white sturgeon. Canadian Journal of Fisheries and Aquatic Sciences 63: 165-175.
Jager HI 2006. Chutes and ladders and other games we play with rivers: II. Simulated effects of translocation on white sturgeon. Canadian Journal of Fisheries and Aquatic Sciences 63: 176-184.
Jager HI, EA Carr & RA Efroymson. 2006. Simulated effects of habitat loss and fragmentation on a solitary, mustelid predator. Ecological Modelling 91: 416-430.
Jager HI 2005. Genetic and demographic implications of aquaculture on white sturgeon (Acipenser transmontanus) conservation. Canadian Journal of Fisheries and Aquatic Sciences. 62(8): 1733-1745.
Jager HI, RA Efroymson, K. Sublette & T.A. Ashwood. 2005. Unnatural landscapes in ecology: Generating the spatial distribution of brine spills. Environmetrics 16: 687-698.
Jager HI, AW King, NH Schumaker, TL Ashwood & BL Jackson. 2005. Spatial uncertainty analysis of population models. Ecological Modelling 185(1): 13-27.
Efroymson, RA, Carlsen TM, Jager, HI, et al. 2004. Pages 261-285 In Toward a Framework for Assessing Risk to Vertebrate Populations from Brine and Petroleum Spills at Exploration and Production Sites, Landscape Ecology and Wildlife Habitat Evaluation, ASTM STP 1458, L. Kapustka et al. (eds.), ASTM International, West Conshohocken, PA.
Jager HI & AW King. 2004. Spatial uncertainty and ecological models. Ecosystems 7: 1-7.
Sullivan, AB, Jager HI & R Myers. 2003. Modeling white sturgeon movement in a reservoir: The effect of water quality. Ecological Modelling 167(1-2): 97-114.
Jager HI & KA Rose. 2003. Designing optimal flow patterns for fall Chinook salmon recruitment in a Central Valley, California river. North American Journal of Fisheries Management 23: 1-21.
Jager HI, W Van Winkle, KA Lepla, JB Chandler, P Bates, & TD Counihan. 2002. Factors controlling white sturgeon recruitment in the Snake River. Pages 127--150 IN: W Van Winkle, PJ Anders, DH Secor, & DA Dixon, eds., Biology, Management, and Protection of Sturgeon, American Fisheries Society Symposium 28, American Fisheries Society, Bethesda, MD.
Jager HI. 2001. Individual variation in life history characteristics can influence population extinction risk. Ecological Modelling 144(1): 59-74.
Jager HI & JA Tyler. 2001. Letter to the editor concerning Railsback et al. 1999. Movement rules for individual-based models of stream fish. Ecological Modelling 144(3): 245-248.
Jager HI, W Van Winkle, K Lepla, & J Chandler. 2001. A theoretical study of river fragmentation by dams and its effects on white sturgeon populations. Environmental Biology of Fishes 60: 347-361.
Jager HI, W Van Winkle, K Lepla, J Chandler, and P Bates. 2000. Population viability analysis of riverine fishes. Special issue of the Journal of Environmental Science and Policy 3: S483-489.
Jager HI, WH Hargrove, CC Brandt, AW King, RJ Olsen, JMO. Scurlock, & KA Rose. 2000. Constructive contrasts between modeled and measured climate responses over a regional scale. Ecosystems 3: 396-411.
Jager HI, W Van Winkle, & BD Holcomb. 1999. Would hydrologic climate changes in Sierra-Nevada streams influence trout persistence? Transactions of the American Fisheries Society 128: 222-240.
Suter, GW II, LW Barnthouse, RA Efroymson, & HI Jager. 1999. Ecological risk assessment in a large river-reservoir: 2. fish community. Environmental Toxicology and Chemistry 18(4): 589-598.
Van Winkle W,.HI Jager, SF Railsback, BD Holcomb, TK Studley, & JE Baldrige. 1998. Individual-based model of sympatric populations of brown and rainbow trout for instream flow assessment: model description and calibration. Ecological Modelling 110: 175-207.
Van Winkle W, KA Rose, BJ Shuter, HI Jager, & BD Holcomb. 1997. Effects of climatic temperature change on growth, survival, and reproduction of rainbow trout: predictions from a simulation model. Canadian Journal of Fisheries and Aquatic Sciences 54: 2526-2542.
Van Winkle W, CC Coutant, HI Jager, and others. 1997. Uncertainty and instream flow standards: perspectives based on research and assessment experience. Fisheries 21: 21-22.
Jager HI, HE Cardwell, MJ Sale, MJ Bevelhimer, CC Coutant, & W Van Winkle. 1997. Modelling the linkages between flow management and salmon recruitment in streams. Ecological Modelling 103: 171-191.
Cardwell H, HI Jager, & MJ Sale. 1996. Designing instream flows to satisfy fish and human water needs. ASCE Journal of Water Resources Planning and Management 122(5): 356-363.
Jager HI & WS Overton. 1993. Explanatory models for ecological response surfaces. Chapter 42, pp. 422 ‐ 437 IN Goodchild, M.F., B.O. Parks, and L.T. Steyaert (eds.), Environmental Modeling with GIS. Oxford University Press, NY.
Jager HI, DL DeAngelis, MJ Sale, W VanWinkle, DD Schmoyer, MJ Sabo, DJ Orth, & JA Lukas. 1993. An individual-based model of smallmouth bass reproduction and young-of-year dynamics in streams. Rivers 4: 91-113.
Cook, RB & HI Jager. 1991. Upper Midwest: The effects of hydrologic lake type and acidic deposition on lakewater chemistry. Chapter 13 IN D.F. Charles (ed.). Acidic Deposition and Aquatic Ecosystems: Regional Case Studies. Springer‐Verlag, New York.
Jager HI, MJ Sale, & RL Schmoyer. 1990. Regional assessment of water quality in the Southern Blue Ridge Province using cokriging. Water Resources Research 26(7):1401-1412.
Dale, VH, HI Jager, RH Gardner, & AE Rosen. 1988. Using sensitivity and uncertainty analysis to improve predictions of broadscale forest development. Ecological Modelling 42:165-178.
Jager HI & RH Gardner. 1988. A simulation experiment to investigate food web polarization. Ecological Modelling 41: 101-116.