Ubiquitous healthy diatoms in the deep sea confirm deep carbon injection by the biological pump
González-Gordillo, J. I.
Cerezo, M. I.
Gasol, J. M.
Duarte, Carlos M.
KAUST DepartmentBiological and Environmental Sciences and Engineering (BESE) Division
Marine Science Program
Red Sea Research Center (RSRC)
Online Publication Date2015-07-09
Print Publication Date2015-12
Permanent link to this recordhttp://hdl.handle.net/10754/560370
MetadataShow full item record
AbstractThe role of the ocean as a sink for CO2 is partially dependent on the downward transport of phytoplankton cells packaged within fast-sinking particles. However, whether such fast-sinking mechanisms deliver fresh organic carbon down to the deep bathypelagic sea and whether this mechanism is prevalent across the ocean requires confirmation. Here we report the ubiquitous presence of healthy photosynthetic cells, dominated by diatoms, down to 4,000 m in the deep dark ocean. Decay experiments with surface phytoplankton suggested that the large proportion (18%) of healthy photosynthetic cells observed, on average, in the dark ocean, requires transport times from a few days to a few weeks, corresponding to sinking rates (124–732 m d−1) comparable to those of fast-sinking aggregates and faecal pellets. These results confirm the expectation that fast-sinking mechanisms inject fresh organic carbon into the deep sea and that this is a prevalent process operating across the global oligotrophic ocean.
CitationUbiquitous healthy diatoms in the deep sea confirm deep carbon injection by the biological pump 2015, 6:7608 Nature Communications
- Dose-dependent regulation of microbial activity on sinking particles by polyunsaturated aldehydes: Implications for the carbon cycle.
- Authors: Edwards BR, Bidle KD, Van Mooy BA
- Issue date: 2015 May 12
- Mechanisms and Pathways of Small-Phytoplankton Export from the Surface Ocean.
- Authors: Richardson TL
- Issue date: 2019 Jan 3
- Deep carbon export from a Southern Ocean iron-fertilized diatom bloom.
- Authors: Smetacek V, Klaas C, Strass VH, Assmy P, Montresor M, Cisewski B, Savoye N, Webb A, d'Ovidio F, Arrieta JM, Bathmann U, Bellerby R, Berg GM, Croot P, Gonzalez S, Henjes J, Herndl GJ, Hoffmann LJ, Leach H, Losch M, Mills MM, Neill C, Peeken I, Röttgers R, Sachs O, Sauter E, Schmidt MM, Schwarz J, Terbrüggen A, Wolf-Gladrow D
- Issue date: 2012 Jul 18
- Dynamic sinking behaviour in marine phytoplankton: rapid changes in buoyancy may aid in nutrient uptake.
- Authors: Gemmell BJ, Oh G, Buskey EJ, Villareal TA
- Issue date: 2016 Oct 12
- Small phytoplankton contribute greatly to CO<sub>2</sub>-fixation after the diatom bloom in the Southern Ocean.
- Authors: Irion S, Christaki U, Berthelot H, L'Helguen S, Jardillier L
- Issue date: 2021 Sep