Joseph Needoba

Email: needobaj@ebs.ogi.edu
Phone: 503 748-1197
Fax: 503 748-1464
Website: Aquatic Biogeochemistry and Plankton Ecology Group

 

Current Appointments

Assistant Professor, Division of Environmental and Biomolecular Systems
Affiliate Scientist, Center for Coastal Margin Observation and Prediction

 

Education

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

 

Research Interests

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.

Search for publications in Google Scholar