Recent Publications

Patrick Center for Environmental Research Peer-Reviewed Publications (1933-2012) 


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.


Araújo, A. and McNair, J.N. 2007. Individual- and population-level effects of antimicrobials on the rotifers, Brachionus calyciflorus and B. plicatilis. Hydrobiologia 593: 185–199.

Ashley, J.T.F., D. Libero, E. Halscheid, L. Zaoudeh, and H. M. Stapleton. 2007. "Polybrominated Diphenyl Ethers in American Eels (Anguilla rostrata) from the Delaware River, USA." Bulletin of Environmental Contamination and Toxicology 79: 99-103.

Flinders, C. A. and D. D. Magoulick. 2007. "The role of predation risk and foraging profitability in habitat selection of a lotic crayfish: effect of depth and crayfish size." Journal of the North American Benthological Society 26: 767-778

Flinders, C. A. and D. D. Magoulick. 2007. "Habitat selection and the importance of environmental variables in lotic crayfish assemblages." Journal of Crustacean Biology 27: 242-254.

Johnson, T.E., McNair, J.N., Srivastava, P., and Hart, D.D. 2007. "Stream ecosystem responses to spatially variable landcover: a model for developing riparian restoration strategies." Freshwater Biology 52: 680-695.

Morales, E. A. and Trainor, F. R. 2007. "The role of phenotypic plasticity in the interpretation of ecological data." In: Feyen, J., Aguirre, L. F. and Moraes, R. M. (Eds.). Congreso internacional sobre desarrollo y medio ambiente y recursos naturales: sostenibilidad a múltiples niveles y escalas/Internacional congress on development, environment and natural resources: Multi-level and multi-scale sustainability. Vol. II.; pp. 1150-1157. Universidad Mayor de San Simón. Talleres Gráficos Kipus.Cochabamba, Bolivia.

Morales, E. A. and Vis, M. 2007. "Epilithic diatoms (Bacillariophyceae) from cloud forest and alpine streams in Bolivia, South America." Proceedings of the Academy of Natural Sciences of Philadelphia 156: 123-155.

O’Connor, M.P., Agosta, S.J., Hansen, F., Kemp, S.J., Sieg, A.E., McNair, J.N. and Dunham, A.E. 2007. "Phylogeny, regression, and the allometry of physiological traits." American Naturalist 170: 431–442.

O’Connor, M.P., Agosta, S.J., Hansen, F., Kemp, S.J., Sieg, A.E., Wallace, B.P., McNair, J.N. and Dunham, A.E. 2007. "Size, selection, and physiology: Reconsidering the mechanistic basis of the metabolic theory of ecology." Oikos 116: 1058–1072.

Patrick, R., J. Palms, D. Kreeger, and C.Harris. 2007. "25 years of radionuclides in the Susquehanna River via periphyton biomonitors." Health Physics Journal 92(1): 1-9.

Palms J., R. Patrick, D. Kreeger, and C.Harris. 2007." Terrestrial and aquatic biomonitors: 25 years of radionuclides detection." Health Physics Journal 92(3): 219-225.

Ponader KC, DF Charles and TJ Belton. 2007. "Diatom-based TP and TN inference models and indices for monitoring nutrient enrichment of New Jersey streams." Ecological Indicators 7:79-93.

Ponader, K.C. and M.G. Potapova. 2007. "Diatoms from the genus Achnanthidium in flowing waters of the Appalachian Mountains (North America): Ecology, distribution and taxonomic notes." Limnologica 37: 227-241.

Potapova, M. and P.B. Hamilton. 2007. "Morphological and ecological variation within the Achnanthidium minutissimum (Bacillariophyceae) species complex." Journal of Phycology 43:561-575.

Potapova M and DF Charles. 2007. "Diatom metrics for monitoring eutrophication in rivers of the United States." Ecological Indicators 7: 48-70.

Siver, P. A., Hamilton, P. B. and Morales, E. A. 2007. "Notes on the genus Nupela (Bacillariophyceae) including the description of a new species, Nupela scissura sp. nov. and an expanded description of Nupela paludigena." Phycological Research 55: 125-134.

Weis, P. and J.T.F. Ashley. 2007. "Contaminants in Fish of the Hackensack Meadowlands, New Jersey: Size, Sex, and Seasonal Relationships as Related to Health Risks." Arch. Environ. Contam. Toxicol. 52: 80-89


Ashley J.T., K.L. Bushaw-Newton, M. Wilhelm, A. Boettner, G. Drames and D.J. Velinsky. The effects of small dam removal on the distribution of sedimentary contaminants. Environmental Management and Assessment 114(1-30): 287-312.

Bahnck, C.M. and D.M. Fonseca. 2006. Rapid assay to identify the two genetic forms of Culex (Culex) pipens L. (Dipera: Culicidae) and hybrid populations. American Journal of Tropical Medicine and Hygiene 75: 251-255.

Bernhardt E., S.E. Bunn, D.D. Hart, B. Malmqvist, T. Muotka, R.J. Naiman, C. Pringle, M. Reuss and B. van Wilgen 2006. Perspective: The challenge of ecologically sustainable water management. Water Policy 8(5): 475-479.

Beadell J.S., Ishtiaq F., Covas R., Melo M., Warren B.H., Atkinson C.T., Bensch S., Graves G.R., Jhala Y.V., Peirce M.A., Rahmani A.R., Fonseca D.M. and R.C. Fleischer. 2006. Global Phylogeography of Hawaii’s Avian Malaria. Proceedings of the Royal Society of London. 273(1604):2935-44.

Cardinale B.J., H. Hillebrand and D.F. Charles. 2006. Geographic patterns of diversity in streams predicted by a multivariate model of disturbance and productivity. Journal of Ecology 94(3): 609-618.

Charles, D.F., R.J. Stevenson, M. Kelly, and L. Ector. 2006. Workshop report. Diatoms and environmental assessment. In A. Witkowski (ed.), Proceedings of the 18th International Diatom Symposium. Miedzyzdroje, Poland, 2004. A. Witkowski, editor. Biopress Limited, Bristol.

Charles DF, FW Acker, DD Hart, CW Reimer and PB Cotter. 2006. Large-scale regional variation in diatom-water chemistry relationships: Rivers of eastern USA. Hydrobiologia 561(1): 27-57.

Church TM, C Sommerfield, DJ Velinsky, D Point, C Benoit, D Amouroux, D Plaa and O Donard. Marsh sediments as records of sedimentation, eutrophication and metal pollution in the urban Delaware Estuary. Marine Chemistry 102(1-2): 72-95.

Edlund, M. B, Morales, E. A. and Spaulding, S. A. 2006. The type and taxonomy of Fragilaria elliptica Schumann, a widely misconstrued taxon. In Witkowski, A. (Ed.). Proceedings of the 18th International Diatom Symposium, Poland. pp 53-59. Biopress Limited, Bristol, England.

Fairchild, G.W. and D.J. Velinsky. 2006. Effects of small ponds on headwater stream water chemistry. Lake and Reservoir Management. 22 (4): 321-212.

Fingerut, J.T., Hart, D.D. and McNair, J.N. 2006. Silk use enhances benthic invertebrate settlement. Oecologia 150: 202–212.

Fonseca DM, JL Smith, RC Wilkerson and RC Fleischer. 2006. Pathways of expansion and multiple introductions illustrated by large genetic differenatiation among worldwide populations of southern house mosquito. American Journal of Tropical Medicine and Hygiene 74: 284-289.

Keyghobadi N, LaPointe D, Fleischer RC and DM Fonseca 2006. Fine-scale population genetic structure of a wildlife disease vector: the southern house mosquito on the island of Hawaii. Molecular Ecology 15: 3919-3930.

Keyghobadi N, Unger KP, Weintraub JD and DM Fonseca. 2006. Remnant populations of the regal fritillary (Speyeria idalia) in Pennsylvania: local genetic structure in a high gene flow species. Conservation Genetics 7: 309-313.

Lowe, R. L., Morales, E. A. and Kilroy, C. 2006. Frankophila biggsii (Bacillariophyceae), a new diatom species from New Zealand. New Zealand Journal of Botany 44:41-46.

McNair, J.N. 2006. Probabilistic settling in the Local Exchange Model of turbulent particle transport. Journal of Theoretical Biology 241: 420–437.

Morales, E. A. 2006. Staurosira incerta (Bacillariophyceae) a new fragilarioid taxon from freshwater systems in the United States with comments on the structure of girdle bands in Staurosira Ehrenberg and Staurosirella Williams et Round. In Manoylov, K. and Ognjanova, N. (Eds.). Fossil and Recent Phycological Studies. Dobrina Temniskova-Topalova. Festschrift. pp. 133-145. Pensoft Publishers ad University Publishing House. Sophia, Bulgaria.

Morales, E. A. 2006. Small Planothidium Round et Bukhtiyarova (Bacillariophyceae) taxa related to P. daui (Foged) Lange-Bertalot from the United States. Diatom Research 21: 325-342.

Morales, E. A. and Manoylova, K. M. 2006. Morphological studies on selected taxa in the genus Staurosirella Williams et Round (Bacillariophyceae) from rivers in North America. Diatom Research 21: 343-364.

Potapova, M. 2006. Achnanthidium zhakovschikovii sp. nov. (Bacillariophyta) and related species from rivers of Northewstern Russia. Nova Hedwigia, 82(3-4):399-408.

Potapova, M. G. and Winter D. 2006. Use of nonparametric multiplicative regression for modeling diatom habitat: a case study of three Geissleria species from North America. Pages 319-332 In Ognjanova-Rumenova, N. and K. Manoylov (eds.) Advances in Phycological Studies. Festschrift in Honour of Prof. Dobrina Temniskova-Topalova. Pensoft Publishers and University Publishing House, Sofia-Moscow.

Siver, P. A., Morales E. A., van de Vijver, B, Smits, M., Hamilton, P. B., Lange-Bertalot, H. and Hains, J. J. 2006. Observations on Fragilaria longifusiformis comb. nov. et nom. nov. (Bacillariophyceae), a widespread planktic diatom described from North America and Europe. Phycological Research 54: 183-192.

Sprouffske, K., D.F. Charles, E.A. Morales, M. Potapova, K.C. Ponader, D.M. Winter, C. Bell, P. Cotter, R. McCourt, D. Mellott, C. Ratnayaka, and D. Waterman. 2006. Academy of Natural Sciences online algae image resources. In A. Witkowski (ed.), Proceedings of the 18th International Diatom Symposium. Miedzyzdroje, Poland, 2004. A. Witkowski, editor. Biopress Limited, Bristol.

Srivastava P, JN McNair and TE Johnson 2006. Comparison of process-based and artificial neural network approaches for streamflow modeling in an agricultural watershed. Journal of the American Water Resources Association 42(3): 545-563.

Velinsky DJ, KL Bushaw-Newton, TE Johnson and DA Kreeger 2006. Effects of a dam removal in SE Pennsylvania on stream chemistry. Journal of the North American Benthological Society 25(3): 569-582.

Environmental Research