J
John J. Cullen
Researcher at Dalhousie University
Publications - 125
Citations - 12131
John J. Cullen is an academic researcher from Dalhousie University. The author has contributed to research in topics: Phytoplankton & Ocean fertilization. The author has an hindex of 56, co-authored 125 publications receiving 11471 citations. Previous affiliations of John J. Cullen include Bedford Institute of Oceanography & Scripps Institution of Oceanography.
Papers
More filters
Journal ArticleDOI
Mesoscale iron enrichment experiments 1993-2005 : Synthesis and future directions
Philip W. Boyd,Tim Jickells,Cliff S. Law,Stéphane Blain,Edward A. Boyle,Ken O. Buesseler,Kenneth H. Coale,John J. Cullen,H. J. W. de Baar,Michael J. Follows,Mike Harvey,Christiane Lancelot,Maurice Levasseur,N. P. J. Owens,Raymond T. Pollard,Richard B. Rivkin,Jorge L. Sarmiento,Véronique Schoemann,Victor Smetacek,Shigenobu Takeda,Atsushi Tsuda,Suzanne M. Turner,Andrew J. Watson +22 more
TL;DR: The findings of these 12 FeAXs reveal that iron supply exerts controls on the dynamics of plankton blooms, which in turn affect the biogeochemical cycles of carbon, nitrogen, silicon, and sulfur and ultimately influence the Earth climate system.
Journal ArticleDOI
The deep chlorophyll maximum comparing vertical profiles of chlorophyll a
TL;DR: Most vertical distributions of chlorophyll can be explained by the interaction between hydrography and growth, behavior, or physiological adaptation of phytoplankton with no special consideration of grazing by herbivores, even though vertical distribution of epizooplankon are not uniform.
Journal ArticleDOI
Autotrophic picoplankton in the tropical ocean.
William K. W. Li,D. V. Subba Rao,W. G. Harrison,J. C. Smith,John J. Cullen,Brian Irwin,Trevor Platt +6 more
TL;DR: Evidence is presented that these are indeed autotrophic cells and not cell fragments and that they are attributable to particles that could pass a screen with a 1-micrometer pore diameter.
Journal ArticleDOI
Fluorescence‐based maximal quantum yield for psii as a diagnostic of nutrient stress
TL;DR: To resolve the uncertainty about Fv/Fm as a diagnostic of nutrient stress, the neritic diatom Thalassiosira pseudonana (Hustedt) Hasle et Heimdal was grew under nutrient‐replete and nutrient‐stressed conditions, using replicate semicontinuous, batch, and continuous cultures.
Journal ArticleDOI
Assessment of the relationships between dominant cell size in natural phytoplankton communities and the spectral shape of the absorption coefficient
TL;DR: It was found that, in general, when phytoplankton abundance increases, larger sizeclasses are added incrementally to a background of smaller cells, such as pigment packaging and concentration of accessory pigments.