Relationship of phosphate to nitrate uptake for photosynthesis in various regions of the ocean. Note that nitrate is more often limiting than phosphate
The Redfield ratio or Redfield stoichiometry is the consistent atomic ratio of carbon, nitrogen and phosphorus found in marine phytoplankton and throughout the deep oceans.
The term is named for American oceanographer Alfred C. Redfield who in 1934 first described the relatively consistent ratio of nutrients in marine biomass samples collected across several voyages on board the research vessel Atlantis, and empirically found the ratio to be C:N:P = 106:16:1.[1] While deviations from the canonical 106:16:1 ratio have been found depending on phytoplankton species and the study area, the Redfield ratio has remained an important reference to oceanographers studying nutrient limitation. A 2014 paper summarizing a large data set of nutrient measurements across all major ocean regions spanning from 1970 to 2010 reported the global median C:N:P to be 163:22:1.[2]
^Redfield, AC (1934). "On the proportions of organic derivatives in sea water and their relation to the composition of plankton" (PDF). James Johnstone Memorial Volume: 176. Retrieved March 1, 2019.
^Martiny, Adam C.; Vrugt, Jasper A.; Lomas, Michael W. (9 December 2014). "Concentrations and ratios of particulate organic carbon, nitrogen, and phosphorus in the global ocean". Scientific Data. 1 (1): 140048. doi:10.1038/sdata.2014.48. PMC 4421931. PMID 25977799.
The Redfieldratio or Redfield stoichiometry is the consistent atomic ratio of carbon, nitrogen and phosphorus found in marine phytoplankton and throughout...
Look up Redfield in Wiktionary, the free dictionary. Redfield may refer to: Redfield (surname) United Kingdom Redfield, Bristol, an area within the City...
are leading contenders for most limiting nutrients. Discovery of the Redfieldratio was a major insight that helped understand the relationship between...
nutrient composition of phytoplankton drives — and is driven by — the Redfieldratio of macronutrients generally available throughout the surface oceans...
release nitrogen and phosphorus as they remineralize. This ratio has become known as the Redfieldratio, and is used as a fundamental principle in describing...
concentrations of the orthophoshoric acid and its three anions have the ratios [ H 2 PO 4 − ] [ H 3 PO 4 ] ≈ 7.5 × 10 4 [ HPO 4 2 − ] [ H 2 PO 4 − ] ≈...
scientist, oil spill researcher Alfred C. Redfield (1890 – 1983), oceanographer. Discovered the Redfieldratio and served as WHOI senior biologist from...
low energy food for members of another guild. This research on the Redfieldratio of nitrogen to phosphorus shows that local biotic processes can regulate...
compensation depth Great Calcite Belt Redfieldratio Other Climate reconstruction proxies Carbon-to-nitrogen ratio Deep biosphere Deep Carbon Observatory...
Ecosystem respiration Biological pump Oceanic carbon cycle Lake metabolism f-ratio Biomass (ecology) Biogeochemical cycle Lovett, Gary M.; Cole, Jonathan J...
atomic ratio of carbon (C) : nitrogen (N) : phosphorus (P) observed on average in planktonic biomass was originally described by Alfred Redfield, who determined...
compensation depth Great Calcite Belt Redfieldratio Other Climate reconstruction proxies Carbon-to-nitrogen ratio Deep biosphere Deep Carbon Observatory...
DIC by using a TOC analyzer. Samples can be combined with stable isotope ratios 13C/12C, alkalinity measurements, and estimation of physical processes,...
of conventional oil retorting. Hydrogen:carbon atomic ratio > 1.25 Oxygen:carbon atomic ratio < 0.15 Derived principally from lacustrine algae, deposited...
potential for fairly regular ratios of elements maintained across surface oceans in a phenomenon known as the RedfieldRatio. National Council for Science...
compensation depth Great Calcite Belt Redfieldratio Other Climate reconstruction proxies Carbon-to-nitrogen ratio Deep biosphere Deep Carbon Observatory...
compensation depth Great Calcite Belt Redfieldratio Other Climate reconstruction proxies Carbon-to-nitrogen ratio Deep biosphere Deep Carbon Observatory...
compensation depth Great Calcite Belt Redfieldratio Other Climate reconstruction proxies Carbon-to-nitrogen ratio Deep biosphere Deep Carbon Observatory...
Tamara; Spark, Andrew (2009). "Lignin content versus syringyl to guaiacyl ratio amongst poplars". Bioresource Technology. 100 (4): 1628–1633. doi:10.1016/j...
difficult to measure. BNPP (below-ground NPP) is often estimated based on a ratio of ANPP:BNPP (above-ground NPP:below-ground NPP) rather than direct measurements...
compensation depth Great Calcite Belt Redfieldratio Other Climate reconstruction proxies Carbon-to-nitrogen ratio Deep biosphere Deep Carbon Observatory...
compensation depth Great Calcite Belt Redfieldratio Other Climate reconstruction proxies Carbon-to-nitrogen ratio Deep biosphere Deep Carbon Observatory...
compensation depth Great Calcite Belt Redfieldratio Other Climate reconstruction proxies Carbon-to-nitrogen ratio Deep biosphere Deep Carbon Observatory...
compensation depth Great Calcite Belt Redfieldratio Other Climate reconstruction proxies Carbon-to-nitrogen ratio Deep biosphere Deep Carbon Observatory...
compensation depth Great Calcite Belt Redfieldratio Other Climate reconstruction proxies Carbon-to-nitrogen ratio Deep biosphere Deep Carbon Observatory...
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