Now showing items 1-13 of 13

  • Assessment of the relationships between dominant cell size in natural phytoplankton communities and the spectral shape of the absorption coefficient 

    Ciotti, Aurea M., Marlon R. Lewis, and John J. Cullen. 2002. "Assessment of the relationships between dominant cell size in natural phytoplankton communities and the spectral shape of the absorption coefficient." Limnology and Oceanography 47(2): 404-417. DOI:10.4319/lo.2002.47.2.0404
    Size-fractionated chlorophyll concentration and phytoplankton absorption spectra were compared for a wide variety of natural communities. We found that, in general, when phytoplankton abundance increases, larger size-classes ...
  • Changes in buoyancy and chemical composition during growth of a coastal marine diatom: Ecological and biogeochemical consequences 

    Richardson, Tammi L., and John J. Cullen. 1995. "Changes in buoyancy and chemical composition during growth of a coastal marine diatom: Ecological and biogeochemical consequences." Marine Ecology Progress Series 128(1-3): 77-90. doi:10.3354/meps128077
    Growth and sinking of the coastal marine diatom Thalassiosira weissflogii was studied during experiments in a 2.1 m tall water column. Under nutrient-replete conditions, T. weissflogii grew rapidly in the upper layer of ...
  • Inferred influence of nutrient availability on the relationship between Sun-induced chlorophyll fluorescence and incident irradiance in the Bering Sea 

    Schallenberg, Christina, Marlon R. Lewis, Dan E Kelley, and John J. Cullen. 2008. "Inferred influence of nutrient availability on the relationship between Sun-induced chlorophyll fluorescence and incident irradiance in the Bering Sea." Journal of Geophysical Research.C.Oceans 113(7). DOI:10.1029/2007JC004355
    This study examines variability in the relationship between Sun-induced chlorophyll fluorescence and incident solar irradiance as a potential diagnostic of the nutritional status of phytoplankton. The study site is the ...
  • Methyl iodide in the NW Atlantic; spatial and seasonal variation 

    This article first appeared in: Wang, Lu, Robert M. Moore, and John J. Cullen. 2009. "Methyl iodide in the NW Atlantic; spatial and seasonal variation." Journal of Geophysical Research 114(C7): 07007-Citation C07007. DOI: 10.1029/2007JC004626
    While the global ocean is an important source of atmospheric methyl iodide (CH (sub 3) I), the major producers of CH (sub 3) I within the ocean remain unclear. During a seasonal study in the NW Atlantic, the relationship ...
  • Modeling the effects of ultraviolet radiation on embryos of Calanus finmarchicus and Atlantic cod (Gadus morhua) in a mixing environment 

    Kuhn, Penny S., Howard I. Browman, Richard F. Davis, John J. Cullen, et al. 2000. "Modeling the effects of ultraviolet radiation on embryos of Calanus finmarchicus and Atlantic cod (Gadus morhua) in a mixing environment." Limnology and Oceanography 45(8): 1797-1806. DOI:10.4319/lo.2000.45.8.1797
    It is well established that ultraviolet radiation (UVR, 280-400 nm) harms aquatic organisms. Reductions in productivity have been reported for phytoplankton, ichthyoplankton, and zooplankton in incubations exposed to UVR. ...
  • Ocean Fertilization Science, Policy, and Commerce 

    Strong, Aaron L., John J. Cullen, and Sallie W. Chisholm. 2009. "Ocean Fertilization Science, Policy, and Commerce." Oceanography 22(3): 236-261. DOI: 10.5670/oceanog.2009.83
    Over the past 20 years there has been growing interest in the concept of fertilizing the ocean with iron to abate global warming. This interest was catalyzed by basic scientific experiments showing that iron limits primary ...
  • Optical detection and assessment of algal blooms 

    Cullen, John J., Aurea M. Ciotti, Richard F. Davis, and Marlon R. Lewis. 1997. "Optical detection and assessment of algal blooms." Limnology and Oceanography 42(5 PART 2): 1223-1239. DOI:10.4319/lo.1997.42.5_part_2.1223
    Concerns about harmful algal blooms (HABs) have grown in recent years. There is a pressing need for robust, quantitative, and cost-effective methods to detect and characterize algal blooms. Critical applications of these ...
  • Patterns and Prediction in Microbial Oceanography 

    Cullen, John J., W. Ford Doolittle, Simon A. Levin, and William K. W. Li. 2007. "Patterns and Prediction in Microbial Oceanography." Oceanography 20(2): 34-46. doi:10.5670/oceanog.2007.46
    No abstract available.
  • Predicting and verifying the intended and unintended consequences of large-scale ocean iron fertilization 

    Cullen, John J., and Philip W. Boyd. 2008. "Predicting and verifying the intended and unintended consequences of large-scale ocean iron fertilization." Marine Ecology Progress Series 364: 295-301. doi:10.3354/meps07551
    Ocean iron fertilization (OIF) is being considered as a strategy for mitigating rising atmospheric CO2 concentrations. One model for implementation is the sale of carbon offsets. Modeling studies predict that OIF has the ...
  • Retrieval of phytoplankton biomass from simultaneous inversion of reflectance, the diffuse attenuation coefficient, and Sun-induced fluorescence in coastal waters 

    Huot, Yannick, Catherine A. Brown, and John J. Cullen. 2007. "Retrieval of phytoplankton biomass from simultaneous inversion of reflectance, the diffuse attenuation coefficient, and Sun-induced fluorescence in coastal waters." Journal of Geophysical Research-Oceans 112(C6): 06013-C06013. DOI:10.1029/2006JC003794
    [1] A model has been developed to retrieve phytoplankton absorption, a proxy for phytoplankton biomass, from observations of reflectance ( R) and the diffuse attenuation coefficient (K-d) collected by moored radiometers ...
  • Spectrally weighted transparency in models of water-column photosynthesis and photoinhibition by ultraviolet radiation 

    Lehmann, Moritz K., Richard F. Davis, Yannick Huot, and John J. Cullen. 2004. "Spectrally weighted transparency in models of water-column photosynthesis and photoinhibition by ultraviolet radiation." Marine Ecology Progress Series 269: 101-110. doi:10.3354/meps269101
    We present a simple method for describing the influence of variable attenuation of spectral irradiance, Kd(lambda), on water-column photosynthesis and its inhibition by ultraviolet radiation (UV). The approach is based on ...
  • Status of the iron hypothesis after the open-ocean enrichment experiment 

    Cullen, John J.. 1995. "Status of the iron hypothesis after the open-ocean enrichment experiment." Limnology and Oceanography 40(7): 1336-1343. DOI:10.4319/lo.1995.40.7.1336
    No abstract available.
  • Vertical migration, nutrition and toxicity in the dinoflagellate Alexandrium tamarense 

    Macintyre, J. Geoff, John J. Cullen, and Allan D. Cembella. 1997. "Vertical migration, nutrition and toxicity in the dinoflagellate Alexandrium tamarense." Marine Ecology Progress Series 148(1-3): 201-216. doi:10.3354/meps148201
    The effect of nitrate-N availability on paralytic shellfish toxin production by the dinoflagellate Alexandrium tamarense was studied in a vertically stratified laboratory water column (tank) where swimming behavior could ...