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Thompson, M.A., D.L. Guelda and R.W. Koch.  In Prep.  The effect of riparian forest cover, riparian forest density, and stream geomorphology on large wood recruitment in a boreal forest stream ecosystem, Superior National Forest, Minnesota. 

Phillips, M. D, D.L. Guelda and R.W. Koch.  In prep.  Spatial and temporal differences in Macroinvertebrates and Zooplankton Populations in teh Headwaters of the Mississippi River

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Koch, R.W., D.L. Guelda, B.P. Palik, and J.D. Kragthorpe.In review.Importance of large woody debris dams on nutrient retention and organic matter processing in forest streams.Journal of North American Benthological Society

Koch, R.W., D.L. Guelda and P.A. Bukaveckas.Influence of temperature and discharge on resource limitation of bacterioplankton in three large regulated rivers, USA.Aquatic Microbial Ecology.

Koch, R.W., D.L. Guelda and P.A. Bukaveckas.2007.Importance of phytoplankton carbon to heterotrophic bacteria in the Ohio, Cumberland and Tennessee Rivers. Hydrobiologia.

Koch, R., D. Guelda and P. Bukaveckas. 2006. The importance of phytoplankton to heterotrophic bacteria in three large riverine systems: the Ohio River, Kentucky Lake and Lake Barkley. Hydrobiologia.  

Bukaveckas, P., D. Guelda, J. Jack, R. Koch, T. Sellers and J. Shostell. 2005. Effects of point source inputs, sub-basin delivery and longitudinal variation in material retention on C, N and P fluxes within the Ohio River Basin. Ecosystems 8: 825-840.

Koch, R., P. Bukaveckas, and D. Guelda. 2005. Importance of phytoplankton carbon to heterotrophic bacteria in the Ohio, Cumberland and Tennessee rivers. In press. Hydrobiologia.

Guelda, D., R. Koch, J. Jack, and P. Bukaveckas. 2005. Experimental evidence for density-dependent effects and the importance of algal production in determining population growth rates of riverine zooplankton. River Research and Applications 21: (6) 595-608.

Koch, R., D. Guelda, and P. Bukaveckas. 2004. Phytoplankton growth in the Ohio, Cumberland and Tennessee Rivers, USA: inter-site differences in light and nutrient limitation. Aquatic Ecology 38: 17-26.

Greenwood, K., J. Thorp, R. Summers and D. Guelda. 2001. Effects of an exotic bivalve mollusk on benthic invertebrates and food quality in the Ohio River. Hydrobiologia 462: 169-172.