My profile

Personal information

Full Name

Joseph Needoba

Title

Assistant Professor

Phone

503-346-3421

Email

needobaj@ohsu.edu

Affiliation

Oregon Health & Science University

Department

Institute of Environmental Health

Office

Hatfield Research Center, 3rd floor, Room 314

Education

B.Sc., Biology and Oceanography (Honours), University of British Columbia, Vancouver, BC, 1997
Ph.D., Botany, University of British Columbia, 2003

Research Interest

Marine biogeochemistry; in situ sensors and instruments; phytoplankton ecology and physiology; stable isotope ecology.

Selected Publications

Johnson, K.S.; Needoba J.A. (2008). Mapping the spatial variability of plankton metabolism using nitrate and oxygen sensors on an autonomous underwater vehicle. Limnology and Oceanography 53 (5, part 2), 2237-2250.

Jannasch, H.W.; Coletti, L.J.; Johnson, K.S.; Fitzwater, S.E.; Needoba, J.A.; Plant, J.N. (2008). The Land/Ocean Biogeochemical Observatory: A robust networked mooring system for continuously monitoring complex biogeochemical cycles in estuaries. Limnology and Oceanography Methods, 6:263-276.

Needoba, J. A.; Foster, R. A.; Sakamoto, C.; Zehr, J. P.; Johnson, K. S. (2007) Nitrogen fixation by unicellular diazotrophic cyanobacteria in the temperate oligotrophic North Pacific Ocean. Limnology and Oceanography, 52(4), 1317-1327.

Johnson, K. S.; Needoba, J. A.; Riser, S. C.; Showers, W. J. (2007) Chemical sensor networks for the aquatic environment. Chemical Reviews, 107(2), 623-640.

Granger, J.; Sigman, D. M.; Needoba, J. A.; Harrison, P. J. (2004) Coupled nitrogen and oxygen isotope fractionation of nitrate during assimilation by cultures of marine phytoplankton. Limnology and Oceanography, 49(5), 1763-1773.

Needoba, J. A.; Sigman, D. M.; Harrison, P. J. (2004) The mechanism of isotope fractionation during algal nitrate assimilation as illuminated by the 15N/14N of intracellular nitrate. Journal of Phycology, 40(3), 517-522.

Needoba, J. A.; Harrison, P. J. (2004) Influence of low light and a light:dark cycle on NO-3 uptake, intracellular NO-3, and nitrogen isotope fractionation by marine phytoplankton. Journal of Phycology, 40(3), 505-516.

Needoba, J. A.; Waser, N. A.; Harrison, P. J.; Calvert, S. E. (2003) Nitrogen isotope fractionation in 12 species of marine phytoplankton during growth on nitrate. Marine Ecology: Progress Series, 255 81-91.

Web Page

http://ebs.ogi.edu/biogeochem/research/