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Heather Bechtold

Dr. Heather Bechtold

207 East Campus Science Center
(570) 484-2558

Courses Most Commonly Taught

  • BIOL125, Topics in Biology (non-majors, lecture course)
  • BIOL 206, Botany
  • BIOL 400, Ecosystems
  • BIOL 499, Independent Studies
  • BIOL 450, Senior Seminar “Understanding Novel Environmental Contaminants”
  • BIOL 107, Principles of Biology (majors, lab and lecture course)
  • BIOL 101, Basic Biology, (non-majors, lab and lecture course)
  • NANO 458, Advanced Applied Nanotechnology

Areas of Expertise

My research focuses on the effect of human impact and natural disturbances on aquatic and terrestrial ecosystem function. I am examining how changing forest structure (due to climate change, pest invasions, acid deposition, and restoration) alters stream nutrient dynamics and metabolism. I also am working to understand how natural disturbances (i.e., hurricanes, landslides), and novel contaminants (pharmaceuticals and personal care products) both alter aquatic and terrestrial ecosystem function. My work addresses these issues in watersheds and streams located in natural and agricultural areas and urban centers.


  • Post Doctoral Researcher, Cary Institute of Ecosystem Studies. Millbrook, NY
  • Ph.D.,  Ecosystem Science and Pedagogy, Idaho State University
  • M.S.,  Plant Community Ecology, Idaho State University
  • B.S., University of Colorado

Courses Developed

  • Botany
  • Ecosystems
  • Topics in Biology
  • Biogeochemistry

Professional Publications

Hough, Z., H. Walters, H.A. Bechtold. Titanium Dioxide (TiO2) more strongly affects bacteria compared to algae in stream ecosystems (2016).  (Student research project- Journal of Student Research) In press.

Warren, D.R., Collins, S.M., Purvis, E.M., Kaylor, M.J., Bechtold, H.B. Ecosystems. (2016). doi:10.1007/s10021-016-0024-9

Warren, D. R., W. S. Keeton, P. M. Kiffney, M. J. Kaylor, H. A. Bechtold, and J. Magee. (2016). Changing forests— changing   streams: riparian forest stand development and ecosystem function in temperate headwaters. Ecosphere 7(8):e01435. 10.1002/ecs2.1435

Small, G., Baulch H., Bechtold H., Holzer, K., Newell, S., Vaquer R. 2014. Headwaters to estuaries: Complex responses to cultural eutrophication at the watershed scale. Eco-Das IX Chapter 6, 106-118.

Roales, J., Duran J., Bechtold H.A., Groffman, P.M., Rosi-Marshall, E.J. 2013. High resolution measurement of light in terrestrial ecosystems using photodegrading dyes. PLOSONE. DOI: 10.1371/journal.pone.0075715

Warren, D.R., W. S. Keeton, Bechtold, H.A., E.J. Rosi-Marshall. 2013.  Comparing streambed light availability and canopy cover in streams with old-growth versus early-mature riparian forests in western Oregon. Aquatic Sciences DOI 10.1007/s00027-013-0299-2

Rosi-Marshall, E.J., D. Kincaid, H.A. Bechtold, T.V. Royer, M. Rojas and J.J. Kelly. 2013. Pharmaceuticals suppress algal growth and microbial respiration and alter bacterial communities in stream biofilms. Ecological  Applications 2013 Apr; 23(3):583-93.

Bechtold, H.A., A.M. Marcarelli, C.V. Baxter, R.S. Inouye. 2012. Effects of N, P, and organic carbon on stream biofilm nutrient limitation and uptake in a semi-arid watershed. Limnology andOceanography 57:1544-1554.

Bechtold, H.A., E. Rosi-Marshall, D.R.Warren, J.J. Cole. 2012. A practical method for measuring integrated solar radiation reaching streambeds using photodegrading dyes. Freshwater Science 31:1070-1077.

Bechtold, H.A., J. Durán, D.L. Strayer, K.C. Weathers, A. Alvarado, N.D. Bettez, M.H. Hersh, R.C. Johnson, E.G. Keeling, J.L. Morse, M.A. Previtali, A. Rodríguez. 2012. Chapter 17: Frontiers in Ecosystem Science. In: Fundamentals of Ecosystem Science (eds) K.C. Weathers, D.L. Strayer, G.E. Likens. Academic Press. ISBN 978-0-12-088774-3. (In press: October 2012)

Hoppe, P., E.J. Rosi-Marshall, H.A. Bechtold. 2012. The antihistamine cimetidine alters stream invertebrate growth and production in artificial streams. Freshwater Science 31: 370-388.

Hopkins, J.M., Marcarelli, A.M., Bechtold, H.A., 2011. Ecosystem structure and function are complementary measures of water quality in a polluted, spring-influenced river. Water, Air, and Soil Pollution. DOI 10.1007/s11270-010-0432-y 

Marcarelli, A.M., Bechtold, H.A., Rugenski, A.T., Inouye, R.S., 2009. Nutrient limitation of biofilm biomass and metabolism in the Upper Snake River basin, southeast Idaho, USA. Hydrobiologia 620: 63-76.  

Suding, K.N., Ashton, I.W., Bechtold, H.A., Bowman, W.D., Mobley, M.L., Winkleman, R., 2008. Plant and microbe contribution to community resilience in a directionally changing environment. Ecological Monographs 78: 313-329.  

Rugenski, A.T., Marcarelli, A.M., Bechtold, H.A., Inouye, R.S., 2008. Effects of temperature and concentration on nutrient release rates from nutrient diffusing substrates. Journal of the North American Benthological Society 27: 52-57.  

Bechtold, H.A., Inouye, R.S., 2007. Distribution of carbon and nitrogen in sagebrush steppe after six years of nitrogen addition and shrub removal. Journal of Arid Environments 71: 122-132.  

Suding, K.N., Miller, A.E., Bechtold, H.A., Bowman, W.D., 2006. The consequence of species loss on ecosystem nitrogen cycling depends on community compensation. Oecologia 149:141-149.  

Bechtold, H. A., Forbis, T. A., Bowman, W.D, Diggle, P.K. 2002. Lack of reproductive plasticity in alpine Saxifraga rhomboidea Greene (Saxifragaceae). Nordic Journal of Botany 22:316-368.

Otte, M., J. Calabrese, and H. Bechtold (2015). The influence of nanoparticles (n-TiO2 and n-Ag) on germination and plant growth. CPUB 2015, Indiana University of PA.

Wallen, T., J. Whitmer, and H. Bechtold (2015). The influence of human impacts on plant and crop growth. CPUB 2015, Indiana University of PA.

Walters, H., Z.Hough, and H. Bechtold (2015).  Titanium dioxide nanoparticles negatively affect microbes but not algae in stream ecosystems. CPUB 2015, Indiana University of PA.

Fuller, R., G. Lawrence, B. Baldigo, C. Kraft, D. Josephson, E. Rosi-Marshall, H. Bechtold, C. Beier. (2014) Why lime Adirondack Streams? Ecological Society of America.

Bechtold H.A., E.J. Rosi-Marshall, D.R. Warren, W. Keeton, JJ Cole. (2014). Stream Ecosystem function is linked to changes in riparian forest structure. Society for Freshwater Sciences, Portland Oregon.

Bechtold, H.A., Drugs in the environment: sources and consequences. (2014). National Science Foundation, Eco-DAS Invited Symposia Participant, Portland, OR 

Rojas, M., EJ Rosi-Marshall, H. Wellard Kelly, HA Bechtold, S. Iqbal, JJ Kelly. (2014). Composition and activity of benthic microbial communities in urban streams with varied anthropogenic inputs. Society for Freshwater Sciences, Portland Oregon.

Turner, D., and HA Bechtold.(2014). The response of photosynthetic pigments to changing annual environmental conditions. CPUB. Bloomsburg University AND White Nose Syndrome symposium.

Breech, T.M., and H.A. Bechtold. (2014). The influence of human impact on stream ecosystem function and water quality. CPUB 2014. Bloomsburg University AND White Nose Syndrome symposium.

Bechtold, H.A. (2014). Invited lecturer: Cornell University: The effects of forest structure on aquatic ecosystem function.

Rosi-Marshall, EJ, HA Bechtold, G. Lovett. (2014) Climate change impacts on Northeast Stream Ecosystems. SUNY New Paltz. May 2014. 

Bechtold, H.A (2013). Invited lecturer at Lycoming college, Scholars 301 course “Sanitation: the real poop”. October

Bechtold, H.A (2013). Invited lecturer, Novel contaminants in aquatic ecosystems: inputs fate and potential ecology effects.  November LHUP biology Club

Servais, S., E. Rosi-Marshal, H.A. Bechtold. (2013). Investigating the effects of pharmaceutical compounds on stream biofilms in various stages of development. Society for Freshwater Science National meeting, Jacksonville FL. Winner of Best Student Poster Award.

Shogren, A., E. Rosi-Marshall, H.A. Bechtold, L. Christenson, M. Pergnall. (2013). Biofilm Response to Short-Term Pharmaceutical Exposure. Society for Freshwater Science National meeting, Jacksonville FL.

Bechtold, H.A., E.J. Rosi-Marshall, D.Warren, W. Keeton, J.J. Cole. (2013). Stream ecosystem function is linked to changes in riparian forest structure. Society for Freshwater Science National meeting, Jacksonville FL. 

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