Dr. Erin Hotchkiss

Biological Sciences
Dr. Hotchkiss is an Assistant Professor of Freshwater Ecology in the Department of Biological Sciences. Research in the Hotchkiss Lab explores climate, landscape, and in situ controls on freshwater biogeochemistry and ecosystem processes (e.g., carbon metabolism, nutrient cycling, food web dynamics), with the aim of understanding these fundamental controls in the context of current and future environmental change. We use empirical data and statistical models to (1) link biological and physical processes with carbon and nutrient sources, cycling, and fate; (2) quantify effects of environmental change on water quality and ecosystem function; (3) identify patterns and consequences of terrestrial-aquatic connectivity within river networks; (4) monitor changing resources in freshwater food webs. Ongoing collaborations with researchers in Sweden, Canada, and the United States seek to quantify the unique and interactive roles of increasing temperatures, changing carbon and nutrient exports from land to water, species losses and introductions, and hydropower dam construction on the chemistry and function of individual and networked streams, lakes, wetlands, reservoirs, and rivers.


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Recent Publications

Mineau, M.M., W.W. Wollhaim, I. Buffam, S.E.G. Findlay, R.O. Hall, E.R. Hotchkiss, L.E. Koenig, W.H. McDowell, & T.B. Parr. 2016. Dissolved organic carbon uptake in streams: A review and assessment of reach-scale measurements. Journal of Geophysical Research – Biogeosciences 121: 2019-2029. doi:10.1002/2015JG003204

Hall, R.O., J.L. Tank, M.A. Baker, E.J. Rosi-Marshall, & E.R. Hotchkiss. 2016. Metabolism, gas exchange, and carbon spiraling in rivers. Ecosystems 19: 73-86. doi:10.1007/s10021-015-9918-1

Hotchkiss, E.R., R.O. Hall, R.A. Sponseller, D. Butman, J. Klaminder, H. Laudon, M. Rosvall, & J. Karlsson. 2015. Sources of and processes controlling CO2 emissions change with the size of streams and rivers. Nature Geoscience 8: 696-699. doi:10.1038/ngeo2507

Burrows, R.M., E.R. Hotchkiss, M. Jonsson, H. Laudon, B.G. McKie, & R.A. Sponseller. 2015. Nitrogen limitation of heterotrophic biofilms in boreal streams. Freshwater Biology 60: 1237-1251. doi:10.1111/fwb.12549

Hotchkiss, E.R. & R.O. Hall. 2015. Whole-stream 13C tracer addition reveals distinct fates of newly fixed carbon. Ecology 96: 403-416. doi:10.1890/14-0631.1

Jonsson, M., P. Hedström, K. Stenroth, E.R. Hotchkiss, F. Vasconcelos, J. Karlsson, & P. Byström. 2015. Climate change modifies the size structure of assemblages of emerging aquatic insects. Freshwater Biology 60: 78-88. doi:10.1111/fwb.12468

Hotchkiss, E.R., R.O. Hall, M.A. Baker, E.J. Rosi-Marshall, & J.L. Tank. 2014. Modeling priming effects on microbial consumption of dissolved organic carbon in rivers. Journal of Geophysical Research – Biogeosciences 119: 982-995. doi:10.1002/2013JG002599

Hotchkiss, E.R. & R.O. Hall. 2014. High rates of daytime respiration in three streams: Use of δ18O-O2 and O2 to model diel ecosystem metabolism. Limnology & Oceanography 59: 798-810. doi:10.4319/lo.2014.59.3.0798

Hubbard, K.A., L.K. Lautz, M.J. Mitchell, B. Mayer, & E.R. Hotchkiss. 2010. Evaluating nitrate uptake in a Rocky Mountain stream using labelled 15N and ambient nitrate chemistry. Hydrological Processes 24: 3322-3336. doi:10.1002/hyp.7764

Hotchkiss, E.R. & R.O. Hall. 2010. Linking calcification by exotic snails to stream inorganic carbon cycling. Oecologia 163: 235-245. doi:10.1007/s00442-009-1536-1

Solomon, C.T., E.R. Hotchkiss, J.M. Moslemi, A.J. Ulseth, E.H. Stanley, R.O. Hall, & A.S. Flecker. 2009. Sediment size and nutrients regulate denitrification in a tropical stream. Journal of the North American Benthological Society 28: 480-490. doi:10.1899/07-157.1

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