Decomposer food web in a deciduous forest shows high share of generalist microorganisms and importance of microbial biomass recycling

The ISME Journal
Rubén López-MondéjarPetr Baldrian

Abstract

Forest soils represent important terrestrial carbon (C) pools where C is primarily fixed in the plant-derived biomass but it flows further through the biomass of fungi and bacteria before it is lost from the ecosystem as CO2 or immobilized in recalcitrant organic matter. Microorganisms are the main drivers of C flow in forests and play critical roles in the C balance through the decomposition of dead biomass of different origins. Here, we track the path of C that enters forest soil by following respiration, microbial biomass production, and C accumulation by individual microbial taxa in soil microcosms upon the addition of 13C-labeled biomass of plant, fungal, and bacterial origin. We demonstrate that both fungi and bacteria are involved in the assimilation and mineralization of C from the major complex sources existing in soil. Decomposer fungi are, however, better suited to utilize plant biomass compounds, whereas the ability to utilize fungal and bacterial biomass is more frequent among bacteria. Due to the ability of microorganisms to recycle microbial biomass, we suggest that the decomposer food web in forest soil displays a network structure with loops between and within individual pools. These results question the presen...Continue Reading

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Citations

Jan 10, 2019·FEMS Microbiology Ecology·Petr Baldrian
Nov 26, 2019·Biological Reviews of the Cambridge Philosophical Society·Amy E ZanneKathleen K Treseder
Jul 7, 2020·FEMS Microbiology Ecology·Michaeline B N AlbrightJohn Dunbar
Nov 7, 2018·Proceedings of the National Academy of Sciences of the United States of America·Sydney I GlassmanJennifer B H Martiny
Jan 19, 2020·The ISME Journal·Erin E NuccioJennifer Pett-Ridge
Aug 4, 2019·Nature Communications·Felipe BastidaManuel Delgado-Baquerizo
Jan 14, 2021·Scientific Reports·Luciana de Sousa LopesAdemir Sérgio Ferreira Araujo

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Methods Mentioned

BETA
PCR
amplicon sequencing

Software Mentioned

BLASTn
SEED

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