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Edward Carpenter

Professor Emeritus



- North Carolina State University

Research Topics:

Nitrogen cycling among plankton, and ambient seawater, phytoplankton and zooplankton ecology.

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  • Bio/Research


    Our group has several major interests. One concerns nitrogen fixation in the sea. We work in tropical and subtropical waters on the biology and ecology of nitrogen fixation in marine planktonic cyanobacteria. Recently we have begun to use remote sensing techniques to study their distribution and factors affecting bloom phenomena.

    Our second major interest centers on the measurement of species-specific growth rates of phytoplankton in the sea. We are attempting to determine factors that limit phytoplankton growth, as well as to understand the role of a species as a primary producer. This research requires a field program to collect phytoplankton and environmental data, and laboratory measurements on the samples using markers of various stages in the cell cycle, and epifluorescence and video microscopy to determine growth rates.

    Lastly, we have been investigating causes of blooms of harmful marine phytoplankton in coastal and estuarine waters.

  • Publications


    Janson, S.,   E.J. Carpenter, B. Bergman, S.J. Giovannoni, and K. Vergin. (in press). Phylogenetic characterization of natural populations of   Trichodesmium spp.  (cyanobacteria) based on 16s rDNA and hetR sequences. J. Phycology.

    Subramaniam, A.,   E.J. Carpenter, D. Karentz and P.G. Falkowski. (in press). Optical properties of the marine diazotrophic cyanobacterium   Trichodesmium; I. Absorption and spectral photosynthetic characteristics. Limnology and Oceanography.

    Subramaniam, A.,   E.J. Carpenter, and P.G. Falkowski. (in press). Optical properties of the marine diazotrophic cyanobacterium   Trichodesmium; II A reflectance model for remote sensing. Limnology and Oceanography.

    Carpenter, E.J., J. Montoya, J. Burns, M. Mulholland, A. Subramaniam and D.G. Capone. (in press). Extensive bloom of N2 fixing symbiotic association in the tropical Atlantic Ocean. Marine Ecology Progress Series.

    Carpenter, E.J., J Chang, and S. Lin. 1998. Phytoplankton growth studies by cell cycle analysis. pp 227-245. IN: K.E. Cooksey (ed.) "Some molecular approaches to the study of the ocean". Chapman & Hall.

    Lin, S., S. Henze, P. Lundgren, B. Bergman and   E.J. Carpenter. 1998. Whole cell immunolocalization of nitrogenase in the marine diazotrophic cyanobacterium   Trichodesmium. Appl. Envir. Microbiology 64:3052-3058.

    Lin, S. and   E.J. Carpenter. 1998. Identification and preliminary characterization of PCNA gene in the marine phytoplankton   Dunaliella tertiolecta  and   Isochrysis galbana. Molecular Marine Biology and Biotechnology 7:62-71.

    Capone, D.G., and   E.J. Carpenter. Nitrogen fixation in the sea. 1998. IN:

    Proceedings of Symposium on Marine Cyanobacteria, Paris, France, November 1997.

    Carpenter, E.J., D.G. Capone, B. Fry and H.R. Harvey. Biogeochemical tracers of the marine cyanobacterium   Trichodesmium. Deep-Sea Research 44:27-38; 1997

    Lin, S. and   Carpenter, E.J.. RUBISCO of   Dunaliella tertiolecta  is redistributed between the pyrenoid and the stroma as a light-shade response. Marine Biology 127:521-529; 1997

    Lin, S. and   Carpenter, E.J.. Pyrenoid localization in relation to the cell cycle and growth phase of   Dunaliella tertiolecta  (Chlorophyceae). Phycologica 36:24-31; 1997

    Capone, D.G., J.P. Zehr, H.W. Paerl, B. Bergman and   E.J. Carpenter.   Trichodesmium: A globally significant marine cyanobacterium. Science 276:1221-1229; 1997

    Carpenter, E.J.  and W.W. Carmichael. Taxonomy of harmful marine cyanobacteria. IN: G.M. Hallegraeff, D. Anderson, A. Cembella (eds.) UNESCO-IOC Manual on Harmful Marine Phytoplankton. pp. 375-382; 1996

    Lin, S.,   E.J. Carpenter  and J. Chang. Detection of p34cdc2 and cyclin B like protiens in   Dunaliella tertiolecta. Marine Biology 125:603-610; 1996

    Carpenter, E.J.; Siddiqui, P.J.A.; Bergman, B.; O'Neil, J.; Capone, D.G. The tropical diazotrophic phytoplankter   Trichodesmium: biological characteristics of two species. Marine Ecology Progress Series 95:295-304; 1993;

    Ben-Porath, J.;   Carpenter, E.J.; Zehr, J. Genotypic relationships in the genus   Trichodesmium  based on nifH sequence comparisons. Journal of Phycology 29:806-810; 1993.

    Roenneberg, T.;   Carpenter, E.J.  Daily rhythm of O 2  evolution in the cyanobacterium   Trichodesmium thiebautii  under natural and constant conditions. Marine Biology 117:693-697; 1993.

    Carpenter, E.J.  Nitrogen fixation in the epiphyllae and root nodules of trees in the lowland tropical rainforest of Costa Rica. Acta OEcologica 13(2): 153-160; 1992.

    Carpenter, E.J.; Capone, D.G. Significance of   Trichodesmium  blooms in the marine nitrogen cycle. In: Carpenter, E.J.; Capone, D.G.; Rueter, J., eds. Marine Pelagic Cyanobacteria:   Trichodesmium  and other Diazotrophs, Dordrecht: Kluwer Academic Publishers; pp. 211-217; 1992.

    Carpenter, E.J., Bergman, B.; Dawson, R.; Siddiqui, P.J.A.; Söderbäck, E.; Capone, D.G. Glutamine synthetase and nitrogen cycling in colonies of the marine diazotrophic cyanobacteria   Trichodesmium  spp. Applied and Environmental Microbiology, September: 3122-3129; 1992.

    Bergman, B.;   Carpenter, E.J.  Nitrogenase confined to randomly distributed trichomes in the marine cyanobacterium   Trichodesmium thiebautii. Journal of Phycology 27:158-165; 1991.

    Carpenter, E.J.; Chang, J.; Shapiro, L. Green and blue-fluorescing dinoflagellates in Bahamian waters. Marine Biology 108:145-149; 1991.

    Carpenter, E.J.; Romans, K. Major role of the cyanobacterium   Trichodesmium  in nutrient cycling in the North Atlantic Ocean. Science 254: 1356-1358; 1991.

    Carpenter, E.J.; Chang, J; Cottrell, M.; Schubauer, J.; Paerl, H.W.; Bebout, B.M.; Capone, D.G. Re-evaluation of nitrogenase oxygen-protective mechanisms in the planktonic marine cyanobacterium   Trichodesmium. Marine Ecology Progress Series 65:151-158; 1990.

    Chang, J.;   Carpenter, E.J.  Species-specific phytoplankton growth rates via diel DNA synthesis cycles. IV. Evaluation of the magnitude of error with computer simulated cell populations. Marine Ecology Progress Series 65:293- 304; 1990.

    Last revised: April 23, 1999
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