Analytical phytoplankton carbon measurements spanning diverse ecosystems Public Deposited

http://ir.library.oregonstate.edu/concern/articles/dv13zw13x

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  • The measurement of phytoplankton carbon (C[subscript]phyto) in the field has been a long-sought but elusive goal in oceanography. Proxy measurements of C[subscript]phyto have been employed in the past, but are subject to many confounding influences that undermine their accuracy. Here we report the first directly measured C[subscript]phyto values from the open ocean. The C[subscript]phyto samples were collected from a diversity of environments, ranging from Pacific and Atlantic oligotrophic gyres to equatorial upwelling systems to temperate spring conditions. When compared to earlier proxies, direct measurements of C[subscript]phyto exhibit the strongest relationship with particulate backscattering coefficients (b[subscript]bp) (R²=0.69). Chlorophyll concentration and total particulate organic carbon (POC) concentration accounted for ~ 20% less variability in C[subscript]phyto than b[subscript]bp. Ratios of C[subscript]phyto to Chl a span an order of magnitude moving across and within distinct ecosystems. Similarly, C[subscript]phyto:POC ratios were variable with the lowest values coming from productive temperate waters and the highest from oligotrophic gyres. A strong relationship between C[subscript]phyto and b[subscript]bp is particularly significant because b[subscript]bp is a property retrievable from satellite ocean color measurements. Our results, therefore, are highly encouraging for the global monitoring of phytoplankton biomass from space. The continued application of our C[subscript]phyto measurement approach will enable validation of satellite retrievals and contribute to an improved understanding of environmental controls on phytoplankton biomass and physiology.
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  • Graff, J. R., Westberry, T. K., Milligan, A. J., Brown, M. B., Dall’Olmo, G., van Dongen-Vogels, V., ... & Behrenfeld, M. J. (2015). Analytical phytoplankton carbon measurements spanning diverse ecosystems. Deep Sea Research Part I: Oceanographic Research Papers, 102, 16-25. doi:10.1016/j.dsr.2015.04.006
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  • description.provenance : Submitted by Patricia Black (patricia.black@oregonstate.edu) on 2016-02-04T21:38:44Z No. of bitstreams: 2 license_rdf: 1232 bytes, checksum: bb87e2fb4674c76d0d2e9ed07fbb9c86 (MD5) GraffJason BotanyPlantPathAnalyticalPhytoplanktonCarbon.pdf: 1495242 bytes, checksum: c1245d6a17ff01acf62988b61a624d61 (MD5)
  • description.provenance : Made available in DSpace on 2016-02-04T21:39:10Z (GMT). No. of bitstreams: 2 license_rdf: 1232 bytes, checksum: bb87e2fb4674c76d0d2e9ed07fbb9c86 (MD5) GraffJason BotanyPlantPathAnalyticalPhytoplanktonCarbon.pdf: 1495242 bytes, checksum: c1245d6a17ff01acf62988b61a624d61 (MD5) Previous issue date: 2015-08
  • description.provenance : Approved for entry into archive by Patricia Black(patricia.black@oregonstate.edu) on 2016-02-04T21:39:10Z (GMT) No. of bitstreams: 2 license_rdf: 1232 bytes, checksum: bb87e2fb4674c76d0d2e9ed07fbb9c86 (MD5) GraffJason BotanyPlantPathAnalyticalPhytoplanktonCarbon.pdf: 1495242 bytes, checksum: c1245d6a17ff01acf62988b61a624d61 (MD5)

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