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Dr. Klotz

Dr. KlotzR. Lawrence Klotz,
Distinguished Teaching Professor

Office: 1215  Bowers Hall
Lab: 1216  Bowers Hall
Phone: 607-753-2709




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    Denison University, B.S.
    University of Connecticut, M.S., Ph.D.


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  • Biological Sciences I
  • Limnology
  • Conservation Biology
  • Field Biology
  • Introduction to Environmental Studies
  • Climate Change Biology


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A number of students and I have studied streams in Central New York to determine how human activities as well as natural processes affect them. We have studied the effect of deicing road salt on sodium concentration and fish respiration, the effect of acid rain on algae, the effect of agriculture on nutrient concentrations, and many other topics. But one of the largest impactors on streams is a natural one, and that is the beaver. We found that the ponds created by beaver dams greatly increase bacterial activity along the stream, and sometimes result in a significant increase in the concentration of phosphorus, the most important nutrient in streams. Students in my Conservation Biology class have also found increased biodiversity along streams as a result of beaver ponds.


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Klotz, R.L., V. Benson, and D. Kalb. 2008.  Biogeochemistry of a New York State Beaver Pond. Poster presentation at the Northeast Natural History Conference X. Albany, NY. April 17-18, 2008. 

Broyles, S.B., J. Getman, L. Klotz and R.L. Klotz.  Digital Field Guides: An Innovative Technology for Exploring Biology.  Poster presentation at the Northesat Natural History Conference X. Albany, NY. April 17-18, 2008. Poster received Honorable Mention from the New York Flora Association. 

Klotz, R.L. and L. Platt. 2011.  Metabolism of a Central New York State Beaver Pond.  Northeast Natural History Conference, Albany, NY. 7-8 April 2011. 

Klotz, R.L. and L. Platt. 2012.  High Dissolved Oxygen Levels in Beaver Ponds and their Potential Impact.  Northeast Natural History Conference, Syracuse, NY. 16 April 2012. 

Klotz, R.L. 2010. Reduction of high nitrate concentrations in a Central New York State stream impounded by beaver. Northeastern Naturalist 17: 349-356. 

Klotz, R.L. 2013. Factors driving the metabolism of two north temperate ponds.  Hydrobiologia.  (DOI) 10.1007/s10750-013-1450-8.


 Recent Grants

“SUNY Cortland Noyce Project.” National Science Foundation grant for scholarships to recruit science/math students into adolescent science/math education.  PI’s: Gregory D. Phalen (leader), Mary Gfeller, Rena Janke, R. Lawrence Klotz. 2009-2014. $899,969.00.