Tracy A. Villareal

Published Articles:

Magaña, H.A. and T.A. Villareal.  2006.  The effect of environmental factors on the growth rate of Karenia brevis (Davis) G. Hansen and Moestrup.  Harmful Algae 5: 192-198.

Pilskaln, C.H., T.A. Villareal, M. Dennett, C. Darkangelo and G. Meadows.  2005.  High concentrations of marine snow and diatom algal mats in the North Pacific Subtropical Gyre:  Implications for carbon and nitrogen cycles in the oligotrophic ocean.  Deep-Sea Research I 52:2315-2332.

Wynne, T.T., R.P. Stumpf, M.C. Tomlinson., V. Ransibrahmanakul, and T.A. Villareal.  2005. Detecting Karenia brevis blooms and algal resuspension in the western Gulf of Mexico with satellite ocean color imagery.  Harmful Algae 4:992-1003.

Singler, H.R. and T.A. Villareal.  2005.  Nitrogen inputs into the euphotic zone by vertically migrating.  Rhizosolenia mats.  Journal of Plankton Research. 27(6):545-556.

Kubanek, J., E. Prince, M.K. Hicks, J. Naar, and T.A. Villareal.  2005.  Does the Florida red tide dinoflagellate use allelopathy to outcompete other phytoplankton.  Limnology and Oceanography. 50(3):883-895.

Adornato, L.R., E.A. Kaltenbacher, T.A. Villareal and R.H. Byrne.  2005.  Continuous in-situ determinations of nitrite at nanomolar concentrations.  Deep-Sea Research I 52:543-551.

Biegalski, S.R. and T.A. Villareal.  2005.  Correlations between atmospheric aerosol trace element concentrations and red tide at Port Aransas, Texas, on the Gulf of Mexico.  Journal of Radioanalytical and Nuclear Chemistry 263(3):767-772.

Cheng, Y.-S., T.A. Villareal, Y. Zhou, J. Gao, R.H. Pierce, D. Wetzel, J. Naar, and D.G. Baden. 2005. Characterization of red tide aerosol on the Texas coast. Harmful Algae 4:87-94.

Villareal, T.A. 2004. Active fluorescence in the giant diatom Ethmodiscus (Bacillariophyceae) documented using single cell PAM fluorometry. Journal of Phycology 40 (6):1052-1061.

PDF version: This is an electronic version of an article published in Journal of Phycology © 2004, the Phycological Society of America.)

Montoya, J.P., C.M. Holl, J.P. Zehr, T.A. Villareal, D.G. Capone. 2004. High rates of N₂-fixation by unicellular diazotrophs in the oliogotrophic Pacific Ocean. Nature 430:1027-1031.

Magaña, H.A., C. Contreras, and T.A. Villareal. 2003. A historical retrospective of Karenia brevis (Davis) G. Hansen and Moestrup in the western Gulf of Mexico. Harmful Algae 2:163-171.

Buskey, E.J., H. DeYoe, F. Jochem, and T. Villareal. 2003. Effects of mesozooplankton removal on trophic structure during a bloom of the Texas brown tide: a mesocosm study. Journal of Plankton Research 25(1).

Villareal, T.A. and E.J. Carpenter. 2003. Buoyancy regulation and the potential for vertical migration in the oceanic cyanobacterium Trichodesmium. Microbial Ecology 45:1-10.

Bersano, J.B.F., E.J. Buskey, and T.A. Villareal. 2002. Viability of the Texas brown tide alga, Aureoumbra lagunensis, in fecal pellets of the copepod Acartia tonsa. Journal of Plankton Biology 49(2):88-92.

Villareal, T., S.L. Morton. 2002. Use of Cell-Specific PAM-Fluorometry to Characterize Host Shading in the epiphytic dinoflagellate Gambierdiscus toxicus. Marine Ecology 23:127-140.

Loret, P., T. Tengs, T.A. Villareal, H. Singler, B. Richardson, P. McGuire, S. Morton, M. Busman, and L. Campbell. 2002. No difference found in ribosomal DNA sequences from physiologically diverse clones of Karenia brevis (Dinophyceae) from the Gulf of Mexico. Journal of Plankton Research 24(7):735-739.

Villareal, T.A., M.A. Brainard, and L.W. McEachron. 2001. Gymnodinium breve in the western Gulf of Mexico: Resident versus advected populations as a seed stock for blooms. In: Harmful Algal Blooms. G. Hallegraef, S.I. Blackburn, C.J. Bolch, and R.J. Lewis (eds.). pp. 153-156. Intergovernmental Oceanographic Commission of UNESCO, Paris.

Liu, H., E.A. Laws, T.A. Villareal, and E.J. Buskey. 2001. Nutrient-limited growth of Aureoumbra lagunensis (Pelagophyceae), with implications of its capability to outgrow other phytoplankton species in phosphate-limited environments. Journal of Phycology 37:500-508.

Villareal, T.A., S.L. Morton, and G.B. Gardner. 2000. Hydrography of a semi-enclosed mangrove lagoon, Manatee Cay, Belize. Atoll Research Bulletin 470:89-103.

McKay, R.M.L., T.A. Villareal, and J. La Roche. 2000. Vertical migration by Rhizosolenia spp. (Bacillariophyceae): Implication for Fe acquisition. Journal of Phycology 36:668-674.

Zehr, J.P., E.J. Carpenter, T.A. Villareal. 2000. New perspectives on nitrogen-fixing microorganisms in the open ocean. Trends in Microbiology 8(2):68-73.

Villareal, T. A., L. Joseph, M.A. Brzezinski, R. F. Shipe, F. Lipschultz, and M.A. Altabet. 1999. Biological and chemical characteristics of the giant diatom Ethmodiscus (Bacillariophyceae) in the central North Pacific gyre. Journal of Phycology 35:896-902.

Buskey, E.J., T.A. Villareal, and T. Lopez-Barreiro. 1999. Reconstructing the initiation of the Texas brown tide bloom of Aureoumbra lagunensis from archived samples using an immunofluorescence assay. Plankton Biology and Ecology 46(2):159-161.

Shipe, R.F., M.A. Brzezinski, C. Pilskaln, and T.V. Villareal. 1999. Silica production of Rhizosolenia mats in the central North Pacific gyre. Limnology and Oceanography 44(2):1282-1292.

Villareal, T.A., C. Pilskaln, M. Brzezinkski, F. Lipschultz, M. Dennett, and G. Gardner. 1999. New estimates of vertical nitrate transport by migrating diatom mats. Nature (London) 397:423-425.

Morton, S.L. and T.A. Villareal. 1998. Bloom of Gonyalulax polygramma Stein (Dinophyceae) in a coral reef mangrove lagoon, Douglas Cay, Belize. Bulletin of Marine Science 63(3):639-642.

Lopez-Barrerio, T., T.A. Villareal, and S.L. Morton. 1998. Development of an antibody against the Texas Brown Tide Aureoumbra lagunensis. In: Harmful Algae. B. Reguera, J. Blanco, M.L. Fernandez and T. Wyatt (Eds.). pp. 263-265. Xunta de Galicia and Intergovernmental Oceanographic Commission of UNESCO.

Villareal, T.A., A. Mansfield, and E.J. Buskey. 1998. Growth and chemical composition of Aureomonas lagunensis. In: Harmful Algae. B. Reguera, J. Blanco, M.L. Fernandez and T. Wyatt (Eds.). pp. 359-362. Xunta de Galicia and Intergovernmental Oceanographic Commission of UNESCO.

Brzezinksi, M.A., T.A. Villareal, F. Lipschulz. 1998. Silica production and the contribution of diatoms to new and primary production in the central North Pacific. Mar. Ecol. Prog. Ser. 167:89-101.

Joseph, L. and T. A. Villareal. 1998. Nitrate reductase activity as a measure of nitrogen incorporation in Rhizosolenia formosa (H.Peragallo): Internal nitrate and diel effects. Journal of Experimental Marine Biology and Ecology 229:159-176.

Hegarty, S.G. and T.A. Villareal. 1998. Effects of light levels and N:P supply ratio on the competition between Phaeocystis cf. pouchetii (Hariot) Lagerheim (Prymnesiophyceae) and five diatom species. Journal of Experimental Marine Biology and Ecology 226:241-258.

Joseph, L., T.A. Villareal, and F. Lipschultz. 1997. A high sensitivity assay for nitrate reductase and its application to vertically migrating Rhizosolenia mats. Aquatic Microbial Ecology 12:95-104.

Moore, J.K. and T.A. Villareal. 1996. Size-ascent rate relationships in positively buoyant marine diatoms. Limnology and Oceanography 41(7):1514-1520.

Moore, J.K. and T.A. Villareal. 1996. Buoyancy and growth characteristics of three positively buoyant marine diatoms. Marine Ecology Progress Series 132:203-213.

Villareal, T.A, S. Woods, J.K. Moore, and K. Culver-Rymsza. 1996. Vertical migration of Rhizosolenia mats and their significance to NO3- fluxes in the central North Pacific gyre. Journal of Plankton Research 18(7)1103-1121.

Richardson, T.L., A.M. Ciotti, J.J. Cullen, and T.A. Villareal. 1996. Physiological and optical properties of Rhizosolenia formosa (Bacillariophyceae) in the context of open-ocean vertical migration. Journal of Phycology 32:741-757.

Villareal, T.A. and F. Lipschultz. 1995. Internal nitrate concentrations in single cells of phytoplankton from the Sargasso Sea. Journal of Phycology 31(5):689-696.

Villareal, T.A. 1995. Abundance and photosynthetic characteristics of Trichodesmium spp. along the Atlantic Barrier Reef at Carrie Bow Cay, Belize. P.Z.S.N. 1. Marine Ecology 16(3):259-271.

Villareal, T.A., D.L. Roelke, and G.A. Fryxell. 1994. Occurrence of the toxic diatom Nitzschia pungens f. multiseries in Massachusetts Bay, Massachusetts, U.S.A. Marine Environmental Research 37:417-423.

Villareal, T.A. and E.J. Carpenter. 1994. Chemical composition and photosynthetic characteristics of Ethmodiscus rex (Bacillariophyceae): Evidence for vertical migration. Journal of Phycology 30(1):1-8.

Villareal, T.A. 1994. Widespread occurrence of the Hemiaulus-cyanobacterial symbiosis in the southwest North Atlantic Ocean. Bulletin of Marine Science 54(1):1-7.

Villareal, T.A., M.A. Altabet, and K. Culver-Rymsza. 1993. Nitrogen transport by vertically migrating diatoms mats in the North Pacific Ocean. Nature (London) 363:709-712.

Villareal, T.A. 1993. Abundance of the giant diatom Ethmodiscus in the southwest Atlantic Ocean and central Pacific gyre. Diatom Research 8(1):171-177.

Villac, M.C., D.L. Roelke, T.A. Villareal, and G.A. Fryxell. 1993. Comparison of two domoic acid producers: A review. Proceedings of the 12th International Symposium on Fossil and Living Diatoms. Hydrobiol. Suppl. 269/270:213-224.

Villareal, T.A. 1992. Buoyancy properties of the giant diatom Ethmodiscus. Journal of Plankton Research 14(3):459-463.

Villareal, T.A. 1992. Marine nitrogen-fixing diatom-cyanobacteria symbioses. In: Marine Pelagic Cyanobacteria: Trichodesmium and other diazotrophs. E. J. Carpenter, et al. (eds.). pp. 163-175. NATO ASI Workshop Series. Kluwer Academic Publishers, Netherlands.

Villareal, T.A. 1991. Nitrogen-fixation by the cyanobacterial symbiont of the diatom genus Hemiaulus. Marine Ecology Progress Series 76(2):201-204.

Sancetta, C., T.A. Villareal, and P. Falkowski. 1991. Massive fluxes of rhizosolenid diatoms: A common occurrence? Limnology and Oceanography 37:1452-1457.

Donaghay, P.L., P.S. Liss, R.A. Duce, D.R. Kester, A.K. Hanson, T.A. Villareal, N. Tindale and D.J. Gifford. 1991. The role of atmospheric nutrient inputs in the chemical and biological dynamics of oceanic ecosystems. Oceanography Magazine 4(2):62-70.

Villareal, T.A. 1990. Laboratory cultivation and preliminary characterization of the Rhizosolenia (Bacillariophyceae)-Richelia (Cyanophyceae) symbiosis. P.Z.S.N. I.: Marine Ecology 11(2):117-132.

Villareal, T.A. and G.A. Fryxell. 1990. Cingulum patterns and resting spore morphology in two species of the diatom genus Porosira Jrg. Botanica Marina 33(5):415-422.

Villareal, T.A. and E.J. Carpenter. 1990. Diel buoyancy regulation in the marine diazotrophic cyanobacterium Trichodesmium thiebautii Ehr. Limnol. Oceanogr. 35(8):1832-1837.

Smayda, T.J., and T.A. Villareal. 1989. An extraordinary, noxious "brown-tide". In: Narragansett Bay. I. The organism and its dynamics. T. Okaichi, D.M. Anderson and T. Nemoto (eds.). pp. 127-130. Red Tides: Biology, Environmental Science and Toxicology.

Villareal, T.A. 1989. Division cycles in the nitrogen-fixing Rhizosolenia (Bacillariophyceae)-Richelia (Nostocaceae) symbiosis. British Phycological Journal 24:357-365.

Smayda, T.J. and T.A. Villareal. 1989. The 1985 "brown" tide and the open phytoplankton niche in Narragansett Bay during the summer. In: Novel Phytoplankton Blooms: Causes and Impacts of Recurrent Brown Tides and Other Unusual Blooms. E.M. Cosper, E.J. Carpenter, and V.M. Bricelj (eds.). pp. 159-188. Lecture Notes on Coastal and Estuarine Studies, Springer-Verlag, Berlin.

Villareal, T.A. and E.J. Carpenter. 1989. Nitrogen-fixation, suspension characteristics and chemical composition of Rhizosolenia mats in the central North Pacific Gyre. Biological Oceanography 6:327-345.

Verity, P.G., T.A. Villareal, and T.J. Smayda. 1988. Ecological investigations of blooms of colonial Phaeocystis pouchetii. I. Size, abundance and metabolic rate. Journal of Plankton Research 10:219-248.

Verity, P.G., T.A. Villareal, and T.J. Smayda. 1988. Ecological investigations of blooms of colonial Phaeocystis pouchetii. II. The role of life-cycle phenomena in bloom termination. Journal of Plankton Research 10:749-766.

Villareal, T.A. 1988. Positive buoyancy in the oceanic diatom Rhizosolenia debyana H. Peragallo. Deep-Sea Research 35A:1037-1045.

Villareal, T.A. 1987. Evaluation of nitrogen fixation in the diatom genus Rhizosolenia Ehr. in the absence of its cyanobacterial symbiont Richelia intracelluluaris Schmidt. Journal of Plankton Research 9:965-971.

Verity, P.G. and T.A Villareal. 1986. The relative food value of diatoms, dinoflagellates, flagellates and cyanobacteria for tintinnid cultures. Archiv f¸r Protistenk¸nde 131:71-84.

Villareal, T.A. and G.A. Fryxell. 1983. Temperature effects on the valve structure of the bipolar diatoms Thalassiosira antarctica and Porosira glacialis. Polar Biology 2:163-169.

Villareal, T.A. and G.A. Fryxell. 1983. The genus Actinocyclus (Bacillariophyceae): Frustule morphology of A. sagittulus sp. nov. and two related species. Journal of Phycology 19:452-466.

Fryxell, G.A., G.F. Hubbard and T.A. Villareal. 1981. The genus Thalassiosira: Variations of the cingulum. Bacillaria 4:41-63.

Fryxell, G.A., T.A. Villareal, and G.J. Doucette. 1981. Diatom resting spores and AGULHAS collections. Antarctic Jour. 16(5):128-130.

Fryxell, G.A., T.A. Villareal, and G.J. Doucette.  1980.  Antarctic phytoplankton: fieldwork and establishment of living cultures.  Antarctic Jour. 15(5):41-142.

Fryxell, G.A., T.A. Villareal, and M.A. Hoban.  1979.  Thalassiosira scotia sp. nov.:  Observations on a phytoplankton increase in early austral spring north of the Scotia Ridge.  Journal of Plankton Research 4:355-370.

Revised:   March 22, 2006