Dr. Michael R. Twiss

(Reading, Writing, Speaking)

Natural Sciences and Engineering Research Council of Canada (NSERC): Dedicated Ship Time: Lake Erie; M.R. Twiss (PI), Nov 5, 2001 to Nov 9, 2001.
New York State Department of Transportation: Winter Impacts along Cascade Lakes in the Adirondacks: C-02-06; Langen, T. (PI), Janoyan, K. (Co-PI), Twiss, M.R. (Co-PI), and Young, T.C (Co-PI), May 2003 to Nov 2005.
United States Environmental Protection Agency - Great Lakes National Program Office: Lake Erie Trophic Transfer Study; M.R. Twiss (PI), R.M.L. McKay (Co-PI), May 2002 to May 2004.
Natural Sciences and Engineering Research Council of Canada (NSERC): Opportunity Ship Time: Lake Erie; M.R. Twiss (PI), Jul 4, 2000 to Jul 15, 2000.
Natural Sciences and Engineering Research Council of Canada (NSERC): Opportunity Ship Time: Lake Ontario; M.R. Twiss (PI), Jul 30, 2001 to Aug 3, 2001.
New York Sea Grant Foundation: Trophic transfer of thallium in freshwater microbial food webs: identifying the biogeochemical pathway of a potentially harmful contaminant in the Great Lakes. N.S. Fisher (PI) and M.R. Twiss (Co-PI), Feb 2000 to Aug 2002.
Ontario Ministry of Training and Education; M.R. Twiss (PI): Inter-laboratory comparison of the DGT technique: A novel method for measuring heavy metals in the aquatic environment, Feb 1999 to Feb 2001.
Great Lakes Protection Fund (GLPF): What Makes Algae Toxic in a Bloom?: Physiological Triggers of Toxins in Harmful Algal Blooms; M.R. Twiss (PI), G.L Boyer (Co-PI), 2004 to 2005.
Lake Champlain Basin Program - USEPA: Herbicide influences on Harmful Algal Blooms in Lake Champlain; M.R. Twiss (PI), T.Mihuc (Co-PI), 2004 to 2006.
National Science Foundation (NSF): Atmospheric Deposition, Transport, Transformations and Bioavailability of Mercury across a Northern Forest Landscape; Driscoll, C.T. (PI), Barkay, T. (Co-PI), Grimberg, S. (Co-PI), Hines, M. (Co-PI), Holsen, T., Munson, R. (Co-PI), and Twiss, M.R. (Co-PI), 2003 to 2009.
National Science Foundation (NSF): Collaborative Research: Development and Field use of Cyanobacterial Iron-Dependent Bioreporters; McKay, R.M.L. (PI), Bullerjahn, G.S. (Co-PI), Twiss, M.R. (PI), 2003 to 2006.
United States Environmental Portection Agency - Great Lakes National Porgram Office (USEPA-GLNPO): Lake Ontario Great Lakes Science Practicum 2003 onboard the R/V Lake Guardian; Twiss, M.R. (PI), Langen, T. (Co-PI), McKay, R.M.L. (Co-PI), Wilhelm, S.W. (Co-PI), and Young, T.C (co-PI), 2003 to .
New York Power Authority (NYPA): Great Rivers Institute: Clarkson University Field Research Request; M.R. Twiss (PI), T.C. Young (Co-PI), 2003 to 2005.
Premier's Research Excellence Award, Province of Ontario: Trace metal biogeochemistry in North American Great Lakes; M.R. Twiss (PI), 2002 to 2002.
Natural Sciences and Engineering Research Council of Canada (NSERC): Liquid scintillation counter. M.R. Twiss (PI), D.E. Barnett-Foster (Co-PI), K.A. Gilbride (Co-PI), 2001 to 2001.
Natural Sciences and Engineering Research Council of Canada (NSERC): Cell culture facility. D.E. Barnett-Foster (PI), (Co-PI), K.A. Gilbride (Co-PI), M. Kolios, (Co-PI), M.R. Twiss (Co PI), 2001 to 2001.
Networks of Centres of Excellence (NSERC): Canadian Water Network: The influence of agricultural and industrial emissions on metal toxicity in the Great Lakes and the Grand River basin, C.L. Chakrabarti (PI), D.R.S. Lean (PI), M.R. Twiss (Co-PI), 2001 to 2003.
Natural Sciences and Engineering Research Council of Canada (NSERC): Analytical voltammeter with 1200W UV lamp and 7 amp power supply. M.R. Twiss (PI), S.N. Liss (Co-PI), S. Wylie (Co-PI), 1999 to 1999.
Toxic Substances Research Initiative, Health Canada/Environment Canada: Validation of the diffusion gradients in thin-films (DGT) technique for assessing the bioavailability of cadmium and lead in the aquatic environment. M.R. Twiss (PI), A. Tessier (Co-PI) and U. Borgmann (Co-PI), 1999 to 2002.
Natural Sciences and Engineering Research Council of Canada (NSERC): Bioactive trace metal geochemistry in the water column of the Great Lakes, 1999 to 2003.
Ryerson Polytechinic University: Trace metal biogeochemistry in the water column of polluted and non-impacted regions of the Great Lakes; M.R. Twiss (PI), 1998 to 1999.

• Ostrom, N.E., Carrick, H.J., Twiss, M.R., Piwinski, L., Evaluation of Primary Production in Lake Erie By Multiple Proxies, Oecologia, In Press, 2005
• Twiss, M.R., Twining, B.S., and Fisher, N.S, Bioconcentration of inorganic and organic thallium by freshwater phytoplankton, Environmental Toxicology and Chemistry, 23, 968-973, 2004
• McKay, R.M.L., Bullerjahn, G.S., Porta, D., Brown, E.T., Sherrell, R.M., Smutka, T.M., Sterner, R.W., Twiss, M.R., and Wilhelm, S.W., Consideration of the bioavailability of iron in the North American Great Lakes: Development of novel approaches towards understanding iron biogeochemistry, Aquatic Ecosystem Health & Management, 7, 1-16, 2004
• Twiss, M.R., Book review of Mark Sproule-Jones. Restoration of the Great Lakes" Promises, Practicies, Performances, The American Review of Canadian Studies, Summer, 364-366, 2004
• Twiss, M.R., K.J. Rattan, R.M. Sherrell, and R.M.L. McKay (2004) Sensitivity of phytoplankton to copper in Lake Superior, Journal of Great Lakes Research, 30, 245-255
• Twining, B.S., Twiss, M.R., and Fisher, N.S, Oxidation of thallium by freshwater plankton communities, Environmental Science and Technology, 37, 2720-2726, 2003
• Wilhelm, S.W., DeBruyn, J.M., Gillor, O., Twiss, M.R., Livingston, K., Bourbonniere, R.A., Pickell, L.D., Trick, C.G., Dean, A.L., and McKay, R.M.L, Effect of phosphorus amendments on present day plankton communities in pelagic Lake Erie, Aquatic Microbial Ecology, 32, 275-285, 2003
• Mioni C.E., Howard A.M., DeBruyn J.M., Bright N.G., Twiss M.R., Applegate, B.M, and Wilhelm,S.W, Characterization and field trials of a bioluminescent bacterial reporter of iron bioavailability, Marine Chemistry, 83, 31-46, 2003
• Porta, D., Bullerjahn, G.S., Durham, K.A., Wilhelm, S.W., Twiss, M.R., and McKay, R.M.L (2003) Physiological characterization of a Synechococcus sp. (Cyanophyceae) strain PCC 7942 iron-dependent bioreporter for freshwater environments, Journal of Phycology, 39, 64-73
• Twiss, M.R., Twining, B.S., and Fisher, N.S (2003) Partitioning of dissolved thallium by seston in Lakes Erie and Ontario, Canadian Journal of Fisheries and Aquatic Sciences, 60, 1369-1375
• Durham, K.A., D. Porta, Twiss, M.R., McKay, R.M.L., and Bullerjahn, G.S, Construction and initial characterization of a luminescent Synechococcus sp. PCC7942 Fe-dependent bioreporter, FEMS Microbiology Letters, 209, 215-221, 2002
• Ralph, L. and Twiss, M.R, Comparative toxicity of Tl(I), Tl(III) and Cd(II) to the unicellular alga Chlorella isolated from Lake Erie, Bulletin of Environmental Contamination and Toxicology, 68, 261-268, 2002
• Twiss, M.R. and Moffett, J.W, A comparison of copper speciation in coastal marine waters measured using analytical voltammetry and Diffusion Gradient in Thin-Film (DGT) techniques, Environmental Science and Technology, 36, 1061-1068, 2002
• Twiss, M.R., Err飡lde, O., Fortin, C., Campbell, P.G.C., Jumarie, C., Denizeau, F., Berkelaar, E., Hale, B., van Rees, K, Coupling the use of computer chemical speciation models and culture techniques in laboratory investigations of trace metal toxicity, Chemical Speciation and Bioavailability, 13, 9-24, 2001
• 2. McKay, R.M.L., M.R. Twiss and C. Nalewajko (2001) Trace metal constraints on carbon, nitrogen and phosphorus acquisition and assimilation by phytoplankton, Algal Adaptation to Environmental Stresses: Physiological, Biochemical and Molecular Mechanisms, Heidelberg, Springer Verlag Pub., 111-134 pages (bookchapter)
• Twiss M.R., Auclair, J.-C., and Charlton, M.N (2000) An investigation into iron-stimulated phytoplankton productivity in the epipelagic Lake Erie during thermal stratification using trace metal techniques, Canadian Journal of Fisheries and Aquatic Sciences, 57, 86-95
• Twiss, M.R., Granier, L., Lafrance, P. and Campbell, P.G.C, Bioaccumulation of 2,2',5,5'-tetrachlorobiphenyl and pyrene by picoplankton (Synechococcus leopoliensis, Cyanophyceae): Influence of variable humic acid concentrations and pH, Environmental Toxicology and Chemistry, 18, 2063-2069, 1999
• Twiss, M.R. and Campbell, P.G.C (1998) Scavenging of [137]Cs, [109]Cd, [65]Zn, and [153]Gd by plankton of the microbial food web in pelagic Lake Erie surface waters, Journal of Great Lakes Research, 24, 776-790
• Twiss, M.R. and Campbell, P.G.C (1998) Trace metal cycling in the surface waters of Lake Erie: Linking ecological and geochemical fates, Journal of Great Lakes Research, 24, 791-807
• Campbell, P.G.C., Twiss, M.R., and Wilkinson, K.J (1997) Accumulation of natural organic matter on the surface of living cells - implication for the interaction of aquatic biota with toxic solutes, Canadian Journal of Fisheries and Aquatic Sciences, 54, 2543-2554
• Parent, L., Twiss, M.R., and Campbell, P.G.C, Influences of natural dissolved organic matter on the interaction of aluminum with the microalga Chlorella: A test for the free-ion model of trace metal toxicity, Environmental Science and Technology, 30, 1713-1720, 1996
• Twiss, M.R., Campbell, P.G.C, and Auclair, J.C, Regeneration, recycling and trophic transfer of trace metals by microbial food web organisms in the pelagic surface water of Lake Erie, Limnology and Oceanography, 41, 1425-1437, 1996
• Twiss, M.R (1996) The importance of chemical speciation: From the bulk medium to the cell surface, Journal of Phycology, 32, 885-886
• Twiss, M.R. and Campbell, P.G.C, Regeneration of trace metals from picoplankton by nanoflagellate grazing, Limnology and Oceanography, 40, 1418-1429, 1995
• Twiss, M.R., Welbourn, P.M., and Schwartzel, E (1993) Laboratory selection for copper tolerance in Scenedesmus acutus (Chlorophyceae), Canadian Journal of Botany, 71, 333-338
• Twiss, M.R. and Nalewajko, C (1992) Influence of phosphorus nutrition on copper toxicity to three strains of Scenedesmus acutus (Chlorophyceae), Journal of Phycology, 28, 291-298
• Twiss, M.R (1990) Copper tolerance of Chlamydomonas acidophila (Chlorophyceae) isolated from acidic, copper-contaminated soils, Journal of Phycology, 26, 655-659
• Mioni, C.E., Handy, S.M., Ellwood, M.J., Twiss, M.R., McKay, R.M.L., Boyd, P.W., and Wilhelm, S.W., Tracking changes in bioavailable Fe within SF6 labeled HNLC waters: a first estimate using a heterotrophic bacterial bioreporter, Global Geochemical Cycles, 2006, In Press
• Hassler, C.S., Twiss, M.R., McKay, R.M.L., and Bullerjahn, G.S., Optimization of iron-dependent cyanobacterial (Synechococcus, Cyanophyceae) bioreporters to measure iron bioavailability, Journal of Phycology, 2006, In Press