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necromass


Molecular interactions of the plant-soil-microbe continuum of bioenergy ecosystems

This research aims to reveal the microbial mechanisms that regulate carbon (C) stabilization in soils dedicated to biofuel crops, and test identified mechanisms in ecosystem-scale field experiments. Emerging evidence suggests that dead microbial biomass, or necromass, constitutes a significant fraction of soil organic matter. Although microbial necromass stabilization is frequently invoked as a mechanisms for long-term soil C storage, there remains limited empirical data illustrating the complement of molecules that comprise microbially derived soil organic C.

Empirical evidence that soil carbon formation from plant inputs is positively related to microbial growth. Bradford BGC 2013

http://bradfordlab.files.wordpress.com/2013/01/bradford-et-al-biogeochem...

Abstract Plant-carbon inputs to soils in the form of
dissolved sugars, organic acids and amino acids fuel
much of heterotrophic microbial activity belowground. Initial residence times of these compounds
in the soil solution are on the order of hours, with
microbial uptake a primary removal mechanism.
Through microbial biosynthesis, the dissolved compounds become dominant precursors for formation of
stable soil organic carbon. How the chemical class
(e.g. sugar) of a dissolved compound influences

Endospore abundance, microbial growth and necromass turnover in deep sub-seafloor sediment

http://www.nature.com/nature/journal/v484/n7392/full/nature10905.html

Nature 484, 101–104 (05 April 2012) doi:10.1038/nature10905

Bente Aa. Lomstein, Alice T. Langerhuus, Steven D’Hondt, Bo B. Jørgensen & Arthur J. Spivack

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