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Photosynthetic rates derived from satellite‐based chlorophyll concentration
We assembled a dataset of 14C‐based productivity measurements to understand the critical variables required for accurate assessment of daily depth‐integrated phytoplankton carbon fixation (PP(PPeu)u)
Temperature effects on export production in the open ocean
A pelagic food web model was formulated with the goal of developing a quantitative understanding of the relationship between total production, export production, and environmental variables in marine
Climate-driven trends in contemporary ocean productivity
Global ocean NPP changes detected from space over the past decade are described, dominated by an initial increase in NPP of 1,930 teragrams of carbon a year, followed by a prolonged decrease averaging 190 Tg C yr-1.
The Evolution and Future of Earth’s Nitrogen Cycle
Humans must modify their behavior or risk causing irreversible changes to life on Earth, as the damage done by humans to the nitrogen economy of the planet will persist for decades, possibly centuries, if active intervention and careful management strategies are not initiated.
Use of active fluorescence to estimate phytoplankton photosynthesis in situ
We describe the theory and practice of estimating photosynthetic rates from light-stimulated changes in the quantum yield of chlorophyll fluorescence. By means of a pump-and-probe fluorescence
The Evolution of Modern Eukaryotic Phytoplankton
The geological, geochemical, and biological processes that contributed to the rise of the dinoflagellates, coccolithophores, and diatoms all contain plastids derived from an ancestral red alga by secondary symbiosis are examined.
A comparison of results with published data suggests that the measured compositions reflect chiefly the intrinsic trace element physiology of the individual species, and provides a basis for examining how phytoplankton influence the relative distributions of the ensemble of major and trace elements in the ocean.
The global carbon cycle: a test of our knowledge of earth as a system.
It is concluded that although natural processes can potentially slow the rate of increase in atmospheric CO2, there is no natural "savior" waiting to assimilate all the anthropogenically produced CO2 in the coming century.
Evolution of the nitrogen cycle and its influence on the biological sequestration of CO2 in the ocean
  • P. Falkowski
  • Environmental Science, Geography
  • 15 May 1997
Over geological time, photosynthetic carbon fixation in the oceans has exceeded respiratory oxidation of organic carbon. The imbalance between the two processes has resulted in the simultaneous