Now showing items 10-29 of 37

  • Fine-Scale Vertical Resolution of Chlorophyll and Photosynthetic Parameters in Shallow-Water Benthos 

    MACINTYRE, HL, and JJ CULLEN. 1995. "Fine-Scale Vertical Resolution of Chlorophyll and Photosynthetic Parameters in Shallow-Water Benthos." Marine Ecology Progress Series 122(1-3): 227-237. doi:10.3354/meps122227
    The vertical distributions of chlorophyll concentration and photosynthetic parameters of sediment-associated microalgae were measured with a resolution of 1 mm. Sediment and the overlying water were sampled at 3 sandy, ...
  • Hypotheses to Explain High-Nutrient Conditions in the Open Sea 

    CULLEN, JJ. 1991. "Hypotheses to Explain High-Nutrient Conditions in the Open Sea." Limnology and Oceanography 36(8): 1578-1599. DOI:10.4319/lo.1991.36.8.1578
    Oceanic high-nutrient, low-chlorophyll waters are characterized principally by the persistence of major nutrients at the sea surface. This condition indicates control of autotrophic production by something other than NO3 ...
  • Impact of ultraviolet radiation on marine crustacean zooplankton and ichthyoplankton: a synthesis of results from the estuary and Gulf of St. Lawrence, Canada 

    Browman, HI, CA Rodriguez, F. Beland, JJ Cullen, et al. 2000. "Impact of ultraviolet radiation on marine crustacean zooplankton and ichthyoplankton: a synthesis of results from the estuary and Gulf of St. Lawrence, Canada." Marine Ecology Progress Series 199: 293-311. doi:10.3354/meps199293
    The objectives of the research program reported upon here were (1) to measure ambient levels of UV radiation and determine which variables most strongly affected its attenuation in the waters of the estuary and Gulf of St. ...
  • 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 ...
  • Inhibition of marine photosynthesis by ultraviolet radiation: Variable sensitivity of phytoplankton in the Weddell-Scotia Confluence during the austral spring 

    Neale, PJ, JJ Cullen, and RF Davis. 1998. "Inhibition of marine photosynthesis by ultraviolet radiation: Variable sensitivity of phytoplankton in the Weddell-Scotia Confluence during the austral spring." Limnology and Oceanography 43(3): 433-448. DOI:10.4319/lo.1998.43.3.0433
    To assess the potential impacts of ozone depletion on photosynthesis in the Southern Ocean, we need to know more about effects of ultraviolet radiation (UV) on phytoplankton in Antarctic waters, where, in addition to ...
  • Mapping coastal optical and biogeochemical variability using an autonomous underwater vehicle and a new bio-optical inversion algorithm 

    Brown, CA, Y. Huot, MJ Purcell, JJ Cullen, et al. 2004. "Mapping coastal optical and biogeochemical variability using an autonomous underwater vehicle and a new bio-optical inversion algorithm." Limnology and Oceanography-Methods 2: 262-281. DOI:10.4319/lom.2004.2.262
    Autonomous underwater vehicles (AUVs) can map water conditions at high spatial ( horizontal and vertical) and temporal resolution, including under cloudy conditions when satellite and airborne remote sensing are not feasible. ...
  • 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. ...
  • New algorithms for MODIS sun-induced chlorophyll fluorescence and a comparison with present data products 

    Huot, Y., CA Brown, and JJ Cullen. 2005. "New algorithms for MODIS sun-induced chlorophyll fluorescence and a comparison with present data products." Limnology and Oceanography-Methods 3: 108-130. DOI:10.4319/lom.2005.3.108
    We discuss important sources of variability in sun-induced chlorophyll fluorescence and examine difficulties in deriving fluorescence data products from satellite imagery, with a focus on the MODerate-resolution Imaging ...
  • New production in the warm waters of the Tropical Pacific Ocean 

    Pena, MA, M. R. Lewis, and J. J. Cullen. 1994. "New production in the warm waters of the Tropical Pacific Ocean." Journal of Geophysical Research.C.Oceans 99(C7): 14-14,268. DOI: 10.1029/94JC00603
    The average depth-integrated rate of new production in the tropical Pacific Ocean was estimated from a calculation of horizontal and vertical nitrate balance over the region enclosed by the climatological 26 degree C ...
  • 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 ...
  • Optical detection and assessment of algal blooms 

    Cullen, J. J., A. M. Ciotti, R. F. Davis, and M. R. Lewis. 1997. "Optical detection and assessment of algal blooms." Limnology and Oceanography 42(5): 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.
  • Photosynthesis, Vol 2 - Development, Carbon Metabolism, and Plant Productivity - Cell Biology - a Series of Monographs - Govindjee 

    CULLEN, JJ. 1983. "Photosynthesis, Vol 2 - Development, Carbon Metabolism, and Plant Productivity - Cell Biology - a Series of Monographs - Govindjee." Quarterly Review of Biology 58(4): 568-569. doi:10.1086/413586
    No abstract available.
  • 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 ...