Net and gross productivity: weighing in with 14C

By J. Marra. 2009

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Partitioning of primary production among giant kelp (Macrocystis pyrifera), understory macroalgae, and phytoplankton on a temperate reef (2011, background): “Twenty-four hour carbon tracer uptake best represents NPP, although high heterotrophic activity during the night may lead to an underestimation of production (Marra 2009).”
Stream metabolism and the open diel oxygen method: Principles, practice, and perspectives (2015, methodology): “Other methods are available to quantify photosynthesis such as the microelectrode (Jørgensen et al. 1979), 14C (Steemann Nielsen 1946; Peterson 1980; Marra 2009), triple-isotope approach (Luz and Barkan 2000; Nicholson et al. 2012).”
Combined constraints on global ocean primary production using observations and models (2013, background): “Interpretation of what 14C incubations measure varies, but there is evidence supporting the conclusion that daytime 14C uptake (which is the case for most in situ measurements) measures NPP [Marra, 2009].”