Browsing Cullen, John by Title

Now showing items 25-37 of 37

  • Photosynthetic characteristics and estimated growth rates indicate grazing is the proximate control of primary production in the Equatorial Pacific 

    Cullen, J. J., M. R. Lewis, C. O. Davis, and R. T. Barber. 1992. "Photosynthetic characteristics and estimated growth rates indicate grazing is the proximate control of primary production in the Equatorial Pacific." Journal of Geophysical Research.C.Oceans 97(C1): 639-654. DOI:10.1029/91JC01320
    Macronutrients persist in the surface layer of the equatorial Pacific Ocean because the production of phytoplankton is limited. Measurements of photosynthesis as a function of irradiance (P-I) provide information on the ...

  • Phytoplankton Growth and Light-Absorption as Regulated by Light, Temperature, and Nutrients 

    KIEFER, DA, and JJ CULLEN. 1991. "Phytoplankton Growth and Light-Absorption as Regulated by Light, Temperature, and Nutrients." Polar Research 10(1): 163-172. doi:10.1111/j.1751-8369.1991.tb00642.x
    Numerous studies of the growth of phytoplankton in the laboratory have demonstrated the dependence of cellular pigment concentration and growth rate upon light intensity, photoperiod, temperature, and nutrient supply. These ...

  • 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 ...

  • Primary production by suspended and benthic microalgae in a turbid estuary: Time-scales of variability in San Antonio Bay, Texas 

    MacIntyre, HL, and JJ Cullen. 1996. "Primary production by suspended and benthic microalgae in a turbid estuary: Time-scales of variability in San Antonio Bay, Texas." Marine Ecology Progress Series 145(1-3): 245-268. doi:10.3354/meps145245
    The within-day, between-day and month-to-month variability of light attenuation and microalgal chlorophyll a (chl a) and photosynthetic response was measured in San Antonio Bay, Texas, USA. Waters were shallow (<2 m) ...

  • Primary Production Estimates from Recordings of Solar Stimulated Fluorescence in the Equatorial Pacific at 150-Degrees-W 

    STEGMANN, PM, MR LEWIS, CO DAVIS, and JJ CULLEN. 1992. "Primary Production Estimates from Recordings of Solar Stimulated Fluorescence in the Equatorial Pacific at 150-Degrees-W." Journal of Geophysical Research-Oceans 97(C1): 627-638. DOI:10.1029/91JC02014
    Biological, optical, and hydrographical data were collected on the WEC88 cruise along 150-degrees-W and during a 6-day time series station on the equator during February/March 1988. This area was characterized by a subsurface ...

  • Relationships between vertical mixing and photoadaptation of phytoplankton: Similarity criteria 

    Lewis, M. R., J. J. Cullen, and T. Platt. 1984. "Relationships between vertical mixing and photoadaptation of phytoplankton: Similarity criteria." Marine ecology progress series.Oldendorf 15(1-2): 141-149.
    In their natural environment phytoplankton are exposed to fluctuations in incident irradiance due to vertical displacements in the water column induced by turbulent fluid motion. A reaction-diffusion model is analyzed to ...

  • 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 ...

  • A semi-analytical model of the influence of phytoplankton community structure on the relationship between light attenuation and ocean color 

    Ciotti, AM, JJ Cullen, and MR Lewis. 1999. "A semi-analytical model of the influence of phytoplankton community structure on the relationship between light attenuation and ocean color." Journal of Geophysical Research-Oceans 104(C1): 1559-1578. DOI:10.1029/1998JC900021
    A model was developed to examine the influence of phytoplankton community structure on the relationship between diffuse attenuation and ratios of upwelling radiance. Shifts in phytoplankton communities were represented by ...

  • The spectral effects of clouds on solar irradiance 

    Bartlett, JS, AM Ciotti, RF Davis, and JJ Cullen. 1998. "The spectral effects of clouds on solar irradiance." Journal of Geophysical Research-Oceans 103(C13): 31017-31031. DOI:10.1029/1998JC900002
    Knowledge of the spectral attenuation associated with clouds is important for accurate estimates of natural irradiance at the Earth's surface. We compare spectral measurements of visible downwelling irradiance, under varying ...

  • 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.

  • A Technique to Assess the Harmful Effects of Sampling and Containment for Determination of Primary Production 

    CULLEN, JJ, M. ZHU, and DC PIERSON. 1986. "A Technique to Assess the Harmful Effects of Sampling and Containment for Determination of Primary Production." Limnology and Oceanography 31(6): 1364-1373. DOI:10.4319/lo.1986.31.6.1364
    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 ...