Recent Publications

Patrick Center for Environmental Research Peer-Reviewed Publications (1933-2016) 


Ashley, J.T.F, R. Soroka, Y. Cintron, A. Sarno, L. Zaoudeh, D. J. Velinsky and J. Baker. 2016. Can polychlorinated biphenyls be removed from Chesapeake Bay by a commercial fishery? Integrated Environmental Assessment and Management, 2(12); 397–406.

Gray, A.B., G.B. Pasternack, E.B. Watson, and M. A. Goñi. 2016. Conversion to drip irrigation agriculture may offset historic anthropogenic and wildfire contributions to sediment production. Science of the Total Environment 556: 219-230.

Hausmann, S., D.F. Charles, J. Gerritsen, and T.J. Belton. 2016. A diatom-based condition gradient (BCG) approach for assessing impairment and developing nutrient criteria for streams. Science of the Total Environment 562: 914-927.

Khadka M.B., Martin J.B. & Kurz M.J. 2016. Synoptic estimates of diffuse groundwater seepage to a spring-fed karst river at high spatial resolution using an automated radon measurement technique. Journal of Hydrology 544: 86-96

Nyphus. R., Velinsky, D.J. and others. 2016. Environmental Deans and Directors Call for NSF Climate Funding. Science. Science 352: 755-756.

Paudel, B., T. Belton, H. Pang and D.J. Velinsky. 2015 Spatial variability of estuarine environmental drivers and response by phytoplankton: A model based approach. Ecological Informatics 34 (2016) 1–12.

Rowell, H.C., M.D. Enache, R. Quinlan, A.J. Smith, J.A. Bloomfield, D.F. Charles, and S.W. Effler. 2016. Quantitative paleolimnological inference models applied to a highresolution biostratigraphic study of lake degredation and recovery, Onondaga Lake, New York (USA). Journal of Paleolimnology 55(3): 241-258

Watson, E.B., K. Szura, C. Wigand, K.B. Raposa, K. Blount, and M. Cencer. 2016. Sea level rise, drought, and the decline of Spartina patens in New England coastal marshes. Biological Conservation 196: 173-181.


Bhanu P., P.A. Montagna and L. Adams 2015. Variations in the release of silicate and orthophosphate along a salinity gradient: Do sediment composition and physical forcing have roles? Estuarine, Coastal, and Shelf Science 157: 42-50.

Gray, A.B., G. B. Pasternack, E.B. Watson, J. A. Warrick, and M. A. Goñi. 2015. Effects of antecedent hydrologic conditions, time dependence, and climate cycles on the suspended sediment load of the Salinas River, California. Journal of Hydrology 525: 632- 649.

Turner, E. L., B. Paudel, P. A. Montagna. 2015. Baseline nutrient dynamics in shallow well mixed coastal lagoon with seasonal harmful algal blooms and hypoxia formation. Marine Pollution Bulletin 96(1-2): 456-462.

Velinsky, D.J., H. Holland, and F.N Scatena. 2015. 2013 Benjamin Franklin Medal in Earth and Environmental Science presented to Robert Arbuckle Berner. Journal of the Franklin Institute 352(7): 2591-2595.

Watson, E. B., C. Wigand, M. Cencer, and K. Blount. 2015. Inundation and precipitation effects on growth and flowering of the high marsh species Juncus gerardii. Aquatic Botany 121 (2015): 52-56.

Watson, E.B., H.M. Andrews, A. Fischer, M. Cencer, L. Coiro, S. Kelley, and C. Wigand. 2015. Growth and photosynthesis responses of two co-occurring marsh grasses to inundation and varied nutrients. Botany 93: 671-683.


Flynn C., Popp J., Hausmann S. and Whisenhunt J. (2014). Gender Differences in Consumption and Perception of Local Produce among High School Students. North American Colleges & Teacher of Agriculture. 58 (4): 317-323.

Guyard H., Francus P., St-Onge G., Hausmann S. and Pientiz R. (2014). Micromorphological characterization of subglacial and subsequent deglacial sediments from the Pingualuit Crater Lake (Ungava, Canada), Canadian Journal of Earth Sciences, 51: 1084 – 1096.

Mascovia, D., J.V. Mead, and R. Dilworth III. 2014. Can Sustainability Plans Make Sustainable Cities? The Ecological Footprint Implications of Renewable Energy within Philadelphia’s Greenworks Plan. Journal of Sustainability: Science, Practice, and Policy.

Mead, J.V. 2014. The fundamental conflict between economic growth and wildlife conservation and its implications for a post peak-oil future. In “Peak Oil, Economic Growth, and Wildlife Conservation”. J. Edward Gates and Brian Czech, editors.

Rowell, H.C, R.F. Bopp, F. Peng, D.J.Velinsky, and J.A. Bloomfield. 2014. Annually Laminated Sediments in Onondaga Lake, NY: high resolution stratigraphy for interpreting lake degradation and recovery. Journal of Paleolimnology 53: 107-121 (DOI 10.1007/s10933-014-9811-5)

Weston, N.B, S.C. Neubauer, D.J. Velinsky and M.A. Vile. 2014. Net Ecosystem Carbon Exchange and the Greenhouse Gas Balance of Tidal Marshes along an Estuarine Salinity Gradient. Biogeochemistry: 120: 163-189.

Winston B., Hausmann S., Scott T.J., Morgan R. 2014. The influence of rainfall on taste and odor production in a South Central U.S. Reservoir. Freshwater Sciences: 33 (3): 755-764.


Ashley, J.T.F, J.S. Ward, C.S. Anderson, M.W. Schafer, L. Zaoudeh, R.J. Horwitz and D.J Velinsky 2013. Children’s daily exposure to polychlorinated biphenyls from dietary supplements containing fish oils. Food Additives & Contaminants: Part A 30(3): 50-514. (DOI:10.1080/19440049.2012.753161)

Bedison, J., F.N. Scatena, J.V. Mead, R. Birdsey, and A. Johnson. 2013. Influences on the spatial pattern of soil carbon and nitrogen in forested and non-forested riparian zones in the Atlantic Coastal Plain of the Delaware River Basin. J. Forest Ecology and Management 302:200-209.

Enache, M.D., Potapova, M., Sheibley, R. & Moran, P. 2013. Three new Psammothidium species from lakes of Olympic and Cascade Mountains in Washington State, USA. Phytotaxa 127(1): 49-57.

Elsey-Quirk, T., A. Smyth, M. Piehler, J. Mead and D.J. Velinsky 2013. Exchange of nitrogen through an urban tidal freshwater wetland in Philadelphia, PA. Jour. Environ. Qual. 42: 1-12.

Herlihy, A.T., N.C. Kamman, J.C. Sifneos, D.F. Charles, M.D. Enache, and R.J. Stevenson. 2013. Using multiple approaches to develop nutrient criteria for lakes in the conterminous USA. Freshwater Science 32: 367-384

Ismail, N.S., D.J. Velinsky, J.T.F. Ashley and R.W. Sanders. 2013. Chorioallantoic membrane as a nonlethal sampling method for polychlorinated biphenyls analysis in the northern diamondback terrapin (Malaclemys terrapin terrapin). Chemistry and Ecology 29(5): 391-4023.

Kroll, S.A., E.E. Morris, S.J. Long, A.E. Hajek, 2013. Parasitism of Sirex noctilio by non-sterilizing Deladenus siricidicola in northeastern North America. Biological Control 67: 203-211.

Luoto T. P. , Salonen V.-P. , Larocque-Tobler I., Pienitz R., Hausmann S. , Guyard H. and St-Onge G. (2013). Pro- and postglacial invertebrate communities of Pingualuit Crater Lake, Nunavik (Canada), and their paleoenvironmental implications. Freshwater Science, 32(3):951-963.

Pearson, S.H., S.S. Kilham, D.J. Velinsky, J.R. Spotila, and H.W. Avery. 2013 Stable isotopes of C and N reveal habitat dependent dietary overlap between native and introduced turtles Pseudemys rubriventris and Trachemys scripta. PLOS One 8(5): e62891 (doi:10.1371/journal.pone.0062891)

Smith, A.J., R.L. Thomas, J.K. Nolan, D.J. Velinsky, S. Klein, and B.T. Duffy. 2013. Regional nutrient thresholds in wadeable streams of New York State protective of aquatic life. Ecol. Ind. 29: 455-467.


Ashley, J.T.F., M.A. Vasquez, P. Zelanko, E. McKinley, M. Schaefer, L. Zadoudeh, R. Horwitz, H.M. Stapleton, and D.V. Velinsky. 2012. Trophic Transfer of polybrominated diphenyl ethers and polychlorinated biphenyls in a tidal freshwater marsh. Chemistry and Ecology 28(4):305-325.

Enache, D.M., D.F. Charles, T.J. Belton, and C.W. Callinan. 2012. Total phosphorus changes in New York and New Jersey lakes (USA) inferred from sediment cores. Lake and Reservoir Management 28 (4): 293-310.

Rinkel, B.E., Hayes, P.K., Gueidan, C. and Brodie, J. 2012. A molecular phylogeny of Acrochaete and other endophytic green algae (Ulvales, Chlorophyta). Journal of Phycology 48 (4): 1020-1027.

Morales, E.A., Novais, M.H., Chávez, G. Hoffmann, L. and Ector, L. 2012. Diatoms (Bacillariophyceae) from the Bolivian Altiplano: three new araphid species from the Desaguadero River draining Lake Titicaca. Fottea 12: 41-58.

Morales, E.A., Manoylov, K.M. and Bahls, L.L. 2012. Fragilariforma horstii sp.nov. (Bacillariophyceae) a new araphid species from the northern United States of America. Nova Hedwigia 141: 141-154.

Morales, E.A. and Rivera, S.F. 2012. Choice of macrophyte substrate in the use of diatoms as indicators of water quality assessment: preliminary data on the case of Alalay Pond (Cochabamba, Bolivia). Lakes, Reservoirs and Ponds 6(1-2): 20-42.

Solak, C. N., Ector, L., Wojtal, A.Z., Acs, E. and Morales, E.A. 2012. A review of investigations on diatoms (Bacillariophyta) in Turkish inland waters. Nova Hedwigia
141: 461-472.


Acs, E., L. Ector, K.T. Kiss, C. Cserháti, E.A. Morales, & Z. Levkov. 2011. "Morphological observations on Amphora micrometra Giffen from the Bolivian Altiplano, South America and its transfer to the genus Halamphora." Diatom Research 26: 199-212.

Cejudo-Figueiras, C., E.A. Morales, C.E. Wetzel, S. Blanco, L. Hoffmann, & L. Ector. 2011. "Analysis of the type of Fragilaria construens var. subsalina (Bacillariophyceae) and description of two morphologically related taxa from Europe and the United States." Phycologia 50: 67-77.

Enache, D.M., A. Paterson, & B.F. Cumming. 2011. "Changes in diatom assemblages from 40 reference lakes in the Experimental Lakes Area (northwestern Ontario, Canada): Assessing the probable role of climatic change." Journal of Paleolimnology 46: 1-15.

Johansen, J.R., K. Řeháková, & F. Acker. 2011. "Tapinothrix ozarkiana sp. nov., with notes on distribution for the genus in North America." Fottea 11(1):141-148.

Keller, D.H. 2011. "Population characteristics of White Catfish and Channel Catfish in the Delaware River Estuary." Pages 423-436 in P.H. Michaletz and V.H. Travnichek, editors. Conservation, ecology, and management of catfish: the second international symposium. American Fisheries Society, Symposium 77, Bethesda, Maryland.

Lieb, D.A., R.W. Bouchard, R.F. Carline, T.R. Nuttall, J.R. Wallace and C.L. Burkholder. 2011. "Conservation and Management of Crayfishes: Lessons from Pennsylvania." Fisheries, 36:10, 489-507

Livshultz, T., J.V. Mead, and M.T. Brannin. (2011). "Climate niches of milkweeds with plesiomorphic traits (Secamonoideae; Apocynaceae) and the milkweed sister group link ancient African climates and floral evolution." American Journal of Botany 98(12): 1966–1977.

Morales, E.A., L. Ector, E. Férnandez, M.H. Novais, D. Hlubikova, P.B. Hamilton, S. Blanco, M.L. Vis, & J.P. Kociolek. 2011. "The genus Achnanthidium Kützing (Achnanthales, Bacillariophyceae) in Bolivian streams: a report of taxa found in recent investigations." Algological Studies 136/137: 89-130.

Taylor, J.C., E.A. Morales, & L. Ector. 2011. "Achnanthidium standeri Cholnoky and Achnanthidium taiaensis (J.R. Carter et Denny) two new combinations of morphologically similar Achnanthidium species from Africa." Algological Studies 136/137: 151-166.

Velinsky, D.J., G.R. Riedel, J.T. Ashley and J.Cornwell 2011. "A contamination history of the Anacostia River, Washington, D.C."  Environmental Assessment and Monitoring 183(1): 307-328.

Weston, N.B., M.A. Vile, S.C. Neubauer and D.J. Velinsky. 2011. "Accelerated microbial organic matter mineralization following salt-water intrusion into tidal freshwater marsh soils." Biogeochemistry 102 (1-3):135-151

Wojtal, A.Z., L. Ector, B. Van de Vijver, E.A. Morales, S. Blanco, J. Piatek, & A. Smieja. 2011. "Morphology and distribution of the Achnanthidium minutissimum complex (Bacillariophyceae) in southern Poland." Algological Studies 136/137: 211-238.


Ashley, J.T.F., J.S. Ward, M.W. Schafer, H.M. Stapleton, and D.J. Velinsky. 2010. "Polychlorinated biphenyls and polybrominated diphenyl ethers in fish oil supplements: Evaluating exposure and health risks" Food Additives and Contaminants 27(8): 1177-1185.

Battarbee, R.W., D.F. Charles, B.F. Cumming, C. Bigler, and I. Renberg. 2010. "Diatoms as indicators of surface water acidity". Pages 98 121. In: The diatoms: Applications for the Environmental and Earth Sciences. Second Edition. Smol, J.P. and E.F. Stoermer, eds. Cambridge University Press, Cambridge.

Cejudo-Figueiras, C., and E.A. Morales. 2010. "Analysis of the type of Fragilaria construens var. subsalina (Bacillariophyceae) and description of two morphologically related taxa from Europe and the United States" Phycologia 50: 67-77.

Morales, E.A., Wetzel, C.E., and Ector, L. 2010. "Two short-striated species of Staurosirella (Bacillariophyceae) from Indonesia and the United States" Polish Botanical Journal 55: 107-117.

Nierzwicki-Bauer, S.A., C.W. Boylen, L.W. Eichler, J.P. Harrison, J.W. Sutherland, W. Shaw, R.A. Daniels, D.F. Charles, F. Acker, T.J. Sullivan, B. Momen, and P. Bukaveckas. 2010. "Acidification in the Adirondacks: Defining the biota in trophic levels of 30 chemically diverse acid-impacted lakes" Environmental Science and Technology. 44 (15): 57215727.

Stansley, W., D.J. Velinsky and R. Thomas. 2010. "Mercury and halogenated organic contaminants in river otters (Lontra Canadensis) in New Jersey USA" Environmental Toxicology and Chemistry; 29: 2235-2242.

Toner, J.A., J.M. Farrell, and J.V. Mead. (2010). "Muskrat house abundance within Upper St. Lawrence River Tributary Wetlands: Evaluation of Responses to Water Level Regulation Plans" Journal of Wetlands 30:211-219.

Williams, D. M., E.A. Morales. 2010. "Pseudostaurosira medliniae a new name for Pseudostaurosira elliptica (Gasse) Jung et Medlin" Diatom Research 25: 225-226.


Ashley, J.T.F., M.L. Webster, J.E. Baker, R. Horwitz, and D.J. Velinsky. 2009. "Polychlorinated biphenyls in sediment and biota from the Delaware River estuary" Proceedings of the Academy of Natural Sciences of Philadelphia. 158: 89-105.

Acs, E, E.A. Morales, K.T. Kiss, B. Bolla, A.Plenkovic-Moraj, M.N. Reskone and L. Ector. 2009. "Staurosira grigorszkyi nom. Nov. (Bacillariophycesae) and araphid diatom from Lake Balaton, Hungary, with notes on Fragilaria hungarica Pantocsek" Nova Hedwigia, 89: 469-483.

Enache , MD and M. Potapova. 2009. "A new species of Sellaphora (SELLAPHORACEAE) from Hannaberry Lake, Arkansas, U.S.A" Acta Bodanica Croatica. 68: 231-237.

Enache , MD and BF Cumming 2009. "Extreme fires under warmer and drier conditions inferred from sedimentary charcoal morphotypes from Opatcho Lake, central British Columbia, Canada" The Holocene. 19: 835-846

Flinders , C.A. and D.D. Hart. 2009. "Effects of pulsed flows on nuisance periphyton growths in rivers: a mesocosm study" River Research and Applications. 25: 1320-1330.

McGee, B.L., A.E. Pinkney, D.J. Velinsky, J.A. Ashley, D.J. Fisher, L.C. Ferrington and T.J Norberg-King. 2009 "Using the sediment quality triad to characterize baseline conditions in the Anacostia River, Washington, DC." Environmental Monitoring and Assessment. 156: 51-67.

McNair, J. N. 2009. "Comparison of two methods for predicting effects of landcover-related stressors on stream biotic integrity at the catchment scale" Proceedings of the Academy of Natural Sciences of Philadelphia. 158: 61-88.

Mead, J.V., F.N.Scatena, R.Birdsey, Y. Pan, and R. Wall. 2009. "Developing SWIM: A Stream-lined Wateshed Integration Model for prioritizing stream restoration and conservation." In: Proceedings from the Global Water Conference in WuHan, China. 2009.

Morales, EA, E. Fernandez, and PJ Kociolek. 2009. "Eplithic diatoms (Bascillariophyta) from cloud forest and alpine streams in Bolivia" SA 3: diatoms from Sehuencas, Carrasco National Park, Department of Cochabamba. Acta Botanica Croatica 68: 263-283.

Morales, E.A. and K.M. Manoylov. 2009. "Mayamaea cahabaensis sp. nov. (Bacillariophyceae), a new freshwater diatom from streams in the United States" Proceedings of the Academy of Natural Sciences of Philadelphia 158: 49-59.

Morales, E.A., R. Lücking, and R. Anze. 2009." Una introducciín al estudio de los líquenes de Bolivia" ["An introduction to the study of the lichens from Bolivia"]. Universidad Católica Boliviana San Pablo. Serie Ecología No. 1. 58 pp. ISSN 2076-779X.

Ren, L., N.N. Rabalais, R.E. Turner, W. Morrison, and W. Mendenhall. 2009. "Nutrient Limitation on Phytoplankton Growth in the Upper Barataria Basin, Louisiana: Microcosm Bioassays" Estuaries and Coasts 32: 958-974.


Bushaw-Newton, K.L, D.A. Kreeger, S. Doaty, and D.J. Velinsky. 2008. "Utilization of Spartina-and Phragmites-derived dissolved organic matter by bacteria and ribbed mussels (Geukensia demissa) from Delaware Bay salt marshes." Estuaries and Coasts 31: 694-703.

Flinders, C. A., R. J. Horwitz, and T. Belton. 2008. "Relationship of fish and macroinvertebrate communities in the mid-Atlantic uplands: implications for integrated assessments." Ecological Indicators 8: 588-598

Horwitz, R.J., C.H. Hession, T. Johnson, P. Overbeck and B. Sweeney. 2008. "Effects of riparian vegetation and watershed urbanization on fishes in streams of the mid-Atlantic Piedmont." J. Amer. Water. Res. Assoc. 44:721-741.

Cooper, J.E., J.V. Mead, J.M Farrell, and R.E. Werner. 2008. "Potential impacts of spawning habitat changes on the segregation of pike (Esox lucius) and muskellunge (E. masquinongy) in the Upper St. Lawrence River." Hydrobiologia 601(1): 41

Newbold, J.D., S. Herbert, B. W. Sweeney, and P. Kiry. 2008. "Water Quality Functions of a 15-year-Old Riparian Forest Buffer System." In Riparian Ecosystems and Buffer's: Working at the Water's Edge, AWRA 2008 Summer Specialty Conference, Virginia Beach, VA, June 30 - July 2, 2008.

Ponader, K.C., D.F. Charles, T.J. Belton, and D.M. Winter. 2008. "Total phosphorus inference models and indices for coastal plain streams based on benthic diatom assemblages from artificial substrates." Hydrobiologia 610: 139-152.

Environmental Research