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Microscale ecology regulates particulate organic matter turnover in model marine microbial communities
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Microscale ecology regulates particulate organic matter turnover in model marine microbial communities
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Journal Article
Microscale ecology regulates particulate organic matter turnover in model marine microbial communities
2018
Overview
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.
Particle-attached bacteria play a key ecosystem role by degrading complex organic materials in the ocean. Here, the authors use model marine microbial communities to show that community composition and interspecies interactions can significantly slowdown the rates of particle turnover in the environment.
Publisher
Nature Publishing Group UK,Nature Publishing Group,Nature Portfolio
Subject
/ 45/23
/ 631/158
/ 631/326
/ Alphaproteobacteria - classification
/ Alphaproteobacteria - metabolism
/ Bacteria
/ Biodegradation, Environmental
/ Carbon
/ Chitin
/ Enzymes
/ Feeders
/ Flavobacteriaceae - classification
/ Flavobacteriaceae - metabolism
/ Gammaproteobacteria - classification
/ Gammaproteobacteria - metabolism
/ Humanities and Social Sciences
/ Microbial Consortia - physiology
/ Microbial Interactions - physiology
/ Particulate Matter - metabolism
/ Power
/ Science
/ Taxonomy
