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Microscale ecology regulates particulate organic matter turnover in model marine microbial communities.
Enke, Tim N; Leventhal, Gabriel E; Metzger, Matthew; Saavedra, José T; Cordero, Otto X.
Afiliação
  • Enke TN; Department of Civil and Environmental Engineering, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA.
  • Leventhal GE; Department of Environmental Systems Science, ETH Zurich, Zürich, 8092, Switzerland.
  • Metzger M; Department of Civil and Environmental Engineering, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA.
  • Saavedra JT; Department of Civil and Environmental Engineering, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA.
  • Cordero OX; Department of Civil and Environmental Engineering, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA.
Nat Commun ; 9(1): 2743, 2018 07 16.
Article em En | MEDLINE | ID: mdl-30013041
The degradation of particulate organic matter in the ocean is a central process in the global carbon cycle, the mode and tempo of which is determined by the bacterial communities that assemble on particle surfaces. Here, we find that the capacity of communities to degrade particles is highly dependent on community composition using a collection of marine bacteria cultured from different stages of succession on chitin microparticles. Different particle degrading taxa display characteristic particle half-lives that differ by ~170 h, comparable to the residence time of particles in the ocean's mixed layer. Particle half-lives are in general longer in multispecies communities, where the growth of obligate cross-feeders hinders the ability of degraders to colonize and consume particles in a dose dependent manner. Our results suggest that the microscale community ecology of bacteria on particle surfaces can impact the rates of carbon turnover in the ocean.
Assuntos

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Água do Mar / Quitina / Alphaproteobacteria / Gammaproteobacteria / Flavobacteriaceae / Ciclo do Carbono Tipo de estudo: Prognostic_studies Idioma: En Revista: Nat Commun Ano de publicação: 2018 Tipo de documento: Article

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Água do Mar / Quitina / Alphaproteobacteria / Gammaproteobacteria / Flavobacteriaceae / Ciclo do Carbono Tipo de estudo: Prognostic_studies Idioma: En Revista: Nat Commun Ano de publicação: 2018 Tipo de documento: Article