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Selected Publications



Wehr, J.D. & Sheath, R.G. [Eds.] 2003. Freshwater Algae of North America: Ecology and Classification. Academic Press, San Diego, CA. 950 pp.


Wehr, J.D., Sheath, R.G., Kociolek, J.P. [Eds.] 2015. Freshwater Algae of North America: Ecology and Classification, second edition. Academic Press, San Diego, CA. 1050 pp.

Books Chapters

Wehr, J.D. 2016. Brown algae (Phaeophyceae) in Rivers. In: River Algae [Necchi, O., Editor], Springer-Verlag, pp. 129-151.  DOI: 10.1007/978-3-319-31984-1_6

Rott, E., Wehr, J.D. 2016. The spatio-temporal development of macroalgae in rivers. In: River Algae, [Necchi, O., Editor], Springer-Verlag, pp 159-195.  DOI: 10.1007/978-3-319-31984-1_8


Watson, S.B., Whitton, B.A., Higgins, S.N., Paerl, H.W., Brooks, B. W., Wehr, J.D. 2015. Harmful Algal Blooms – Chapter 20.  In: Freshwater Algae of North America: Ecology and Classification, 2nd edition. Academic Press, San Diego, CA. pp. 873-920. [ISBN-13: 978-012-385876-4]


Wehr, J.D. 2015. Brown algae – Chapter 19. In: Freshwater Algae of North America: Ecology and Classification, 2nd edition. Academic Press, San Diego, CA. pp. 851-871. [ISBN-13: 978-0123858764]


Wehr, J.D. Sheath, R.G. 2015. Habitats of freshwater algae – Chapter 2. In: Freshwater Algae of North America: Ecology and Classification, 2nd edition. Academic Press, San Diego, CA. pp. 13- 74. [ISBN-13: 978-012-385876-4]


Sheath, R.G., Wehr, J.D. 2015. Introduction to freshwater algae – Chapter 1. In: Freshwater Algae of North America: Ecology and Classification, 2nd edition. Academic Press, San Diego, CA. pp. 1- 11. [ISBN-13: 978-012-385876-4]


Wehr, J.D. 2011. Phylum Phaeophyta (Brown Algae). In: John, D., A.J. Brook, & B.A. Whitton [Eds.], Freshwater Algal Flora of the British Isles, Second Edition, Cambridge University Press, U.K.


Wehr, J.D. 2010. Xanthophyta and Phaeophyta, pp. 271-287, In: Algae: Source to Treatment Manual of Water Supply Practices M57. American Water Works Association, Denver, CO. [ISBN 978-1-58321-787-0].


Selected Peer-Reviewed Articles

Whorley*, S.B., Wehr, J.D. 2022. Periphyton C and N stable isotopes detect agricultural stressors in low-order streams. Freshwater Science 41: 153-166. DOI:


Martin, R.M., Kausch*, M., Yap*, K., Wehr J.D., Boyer, G.L., Wilhelm, S.W. 2021. Metagenome-assembled genome sequences of Raphidiopsis raciborskii and Planktothrix agardhii from a cyanobacterial bloom in Kissena Lake, New York, USA. Microbiology Resource Announcements 10:e01380-20. DOI:


Cantonati, M., Segadelli,S., Spitale, D. Gabrieli, J., Gerecke, R., Angeli, N., De Nardo, M.T., Ogata, K., Wehr, J.D. 2020. Geological and hydrochemical prerequisites of unexpectedly-high spring-environment landscape-level-biodiversity. Science of the Total Environment 740: 140157. DOI:


Torres-Ruiz*, M., Wehr, J.D. 2020. Complementary information from fatty acid and nutrient stoichiometry data improve stream food web analyses. Hydrobiologia 847: 629–645. DOI:


Wehr, J.D., Steirer*, S.E., Sleith*, R.S. 2019. Rediscovery of the freshwater brown alga Heribaudiella in Connecticut After 100 Years. Northeastern Naturalist 26: 343-361. DOI:


Whorley*, S.B., Smucker, N.J., Kuhn, A., Wehr J.D. 2019. Urbanisation alters essential fatty acid relationships within stream food webs.  Freshwater Biology.


Whorley*, S.B., Wehr, J.D. 2018. Multi-year trends in benthic algal fatty acid compounds under agricultural stress. Freshwater Science 35: 534-550.


Sleith*, R.S., Wehr, J.D., Karol, K.G. 2018. Untangling climate and water chemistry to predict changes in freshwater macrophyte distributions. Ecology and Evolution. 8: 2802-2811.DOI:


Grubaugh*, C.R., Wehr, J.D. 2017. Suitability of total nitrogen as a predictor of protein content in stream periphyton. Freshwater Science 36: 533-541.


Brett, M.T., Bunn, S.E., Chandra, S., Galloway, A.W.E, Guo, F., Kainz, M.J., Kankaala, P., Luo, D.C.P., Moulton, T.P., Power, M.E., Rasmusen, J.B., Taipale, S.J., Thorp, J.H., Wehr, J.D.  2017. How important are terrestrial organic carbon inputs for secondary production in freshwater ecosystems?  Freshwater Biology 62:  833–853.


Whorley*, S.B., Wehr, J.D. 2016. Connecting algal taxonomic information to essential fatty acid content in agricultural streams. Phycologia 55: 531-542.


Whorley*, S.B., Wehr, J.D. 2016. Flood events can reduce key fatty acid content of early-stage benthic algal assemblages in an urban stream. Journal of Urban Ecology 2016: 1-12.

Decker*, J., Wehr, J.D., Houser, J., & Richardson, W. 2016. Spatio-temporal phytoplankton patterns in the Upper Mississippi River Pool 8 (La Crosse, WI) indicate flood-pulse dynamics and highlight environmental factors associated with cyanobacterial abundance. River Systems


Smucker, N. J., Kuhn, A., Charpentier, M.A., Cruz-Quinones, C.J., Elonen, C.M., Whorley*, S.B., Jicha, T.M., Serbst, J.R., Hill, B.H., Wehr, J.D. 2016. Quantifying urban watershed stressor gradients and evaluating how different land cover datasets affect stream management. Environmental Management 57: 683-695.  https://doi,.org/10.1007/s00267-015-0629-3


Bury, R.B., Wehr, J.D., Bury J.W., Baggett C., Doten, K. 2015. A high incidence of filamentous algae on western pond turtles, Actinemys marmorata, in the Willamette Valley, Oregon. Northwestern Naturalist 96:150-153.


Tessler, M., Truhn, K.M., Bliss-Moreau, N., Wehr J.D. 2014. Diversity and distribution of stream bryophytes: does pH matter? Freshwater Science 33: 778-787.


Cashman*, M.J., Wehr, J.D., Truhn, K. 2013. Elevated light and nutrients alter the nutritional quality of stream periphyton. Freshwater Biology 58: 1447-1457.


Wehr, J.D., Stancheva, R., Sheath, R.G., Truhn, K. 2013.  Discovery of new populations of the rare freshwater brown alga Pleurocladia lacustris A.Braun in California streams. Western North American Naturalist 73: 148-157.  DOI:


Gabel*, K.W. Wehr, J.D., & Truhn, K.M. 2012. Assessment of the effectiveness of best management practices for streams draining agricultural landscapes using diatoms and macroinvertebrates. Hydrobiologia 680: 247-264.


Torres-Ruiz*, M., & Wehr, J.D. 2010. Changes in the nutritional quality of decaying leaf litter in a stream based on fatty acid content. Hydrobiologia 651: 265-278.


Torres-Ruiz*, M., Wehr, J.D. & Perrone, A.A. 2010. Are net-spinning caddisflies what they eat? An investigation using controlled diets and fatty acids. Journal of the North American Benthological Society 29: 803-813.


O’Brien*, P.J. & Wehr, J.D. 2010. Periphyton biomass and ecological stoichiometry in streams within an urban to rural land-use gradient. Hydrobiologia 657: 89-105.


Torres-Ruiz*, M., Wehr, J.D., & Perrone, A.A. 2007. Trophic relationships in a stream food web: the importance of fatty acids for macroinvertebrate consumers. Journal of the North American Benthological Society 26: 509–522.


McCauley*, L.R. & Wehr, J.D. 2007. Taxonomic reappraisal of the freshwater brown algae Bodanella, Ectocarpus, Heribaudiella, and Pleurocladia (Phaeophyceae) on the basis of rbcL sequences and morphological characters. Phycologia 46: 429-439.


Kostel-Hughes*, F., Young, T.P., & Wehr, J.D. 2005. Effects of leaf litter depth on the emergence and seedling growth of deciduous forest tree species in relation to seed size. Journal of the Torrey Botanical Society 132: 50-60.[50:EOLLDO]2.0.CO;2


Huss*, A.A. & Wehr, J.D. 2004. Strong indirect effects of a submersed aquatic macrophyte, Vallisneria americana, on bacterioplankton densities in a mesotrophic lake. Microbial Ecology 47: 305-315. DOI:


Wehr, J.D. & Perrone*, A.A. 2003. A new record of Heribaudiella fluviatilis, a freshwater brown alga (Phaeophyceae) from Oregon. Western North American Naturalist 63: 517-523.


Wigand, C., Wehr, J.D., Limburg, K., Gorham*, B., Lonergan, S., & Findlay, S. 2000. Effect of Vallisneria americana on community structure and ecosystem function in lake mesocosms.  Hydrobiologia 418: 137-146.


Wehr, J.D., Petersen*, J., & Findlay, S. 1999. Influence of three contrasting detrital carbon sources on planktonic bacterial metabolism in a mesotrophic lake. Microbial Ecology 37: 23-35.


Wehr, J.D., Holen, D.A. MacDonald, M.M.& Lonergan, S.P. 1998. Effects of different carbon sources on a freshwater plankton community. Canadian Journal of Fisheries and Aquatic Sciences 55: 2150-2160.


Wehr, J.D. & Descy, J.-P. 1998. Use of phytoplankton in large river management. Journal of Phycology 34: 741-749.


Wehr, J.D., Lonergan, S.P., & J.H. Thorp. 1997. Concentrations and controls of dissolved organic matter in a constricted-channel region of the Ohio River.  Biogeochemistry 38: 41-65.   


Wehr, J.D. & Thorp, J.H. 1997.  Impacts of navigation dams, tributaries and littoral zones on phytoplankton communities in the Ohio River.  Canadian Journal of Fisheries and Aquatic Sciences 54: 378-395.


Thorp, J.H., Black, A.R., Haag, K.H., & Wehr, J.D. 1994. Zooplankton assemblages in the Ohio River: seasonal, tributary, and navigation dam effects. Canadian Journal of Fisheries and Aquatic Sciences 51: 1634-1643.


Le*, J., Wehr, J.D., & Campbell, L. 1994.  Uncoupling of bacterioplankton and phytoplankton production in fresh waters is affected by inorganic nutrient limitation. Applied and Environmental Microbiology 60: 2086-2093.


Wehr, J.D. Le*, J., & Campbell, L. 1994. Does microbial biomass affect pelagic ecosystem efficiency? An experimental study.  Microbial Ecology 27: 1-17.

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