Microbial Necromass in Soils—Linking Microbes to Soil Processes and Carbon Turnover DOI Creative Commons
Matthias Kästner, Anja Miltner, Sören Thiele‐Bruhn

и другие.

Frontiers in Environmental Science, Год журнала: 2021, Номер 9

Опубликована: Дек. 14, 2021

The organic matter of living plants is the precursor material stored in terrestrial soil ecosystems. Although a great deal knowledge exists on carbon turnover processes plant material, some (SOM) formation, particular from microbial necromass, are still not fully understood. Recent research showed that larger part original converted into biomass, while remaining modified by extracellular enzymes microbes. At end its life, biomass contributes to molecular imprint SOM as necromass with specific properties. Next appropriate environmental conditions, heterotrophic microorganisms require energy-containing substrates C, H, O, N, S, P, and many other elements for growth, which provided nutrients contained SOM. As easily degradable often scarce resources soil, we can hypothesize microbes optimize their energy use. Presumably, able mobilize building blocks (mono oligomers fatty acids, amino sugars, nucleotides) stoichiometry This contrast mobilizing only consuming new synthesis primary metabolites tricarboxylic acid cycle after complete degradation substrates. Microbial thus an important resource SOM, mining could be life strategy contributing priming effects providing growth cycles. Due needs microorganisms, conclude formation through depends flux. However, details variability use decay cycles yet understood linked fields science. Here, summarize current gain, use, decay, relevant processes, e. g. pump, C storage, stabilization. We highlight factors controlling contribution implications efficiency (CUE) identify process-based modelling understanding these various types under different climates.

Язык: Английский

Dynamic Stability of Soil Carbon: Reassessing the “Permanence” of Soil Carbon Sequestration DOI Creative Commons
Katherine A. Dynarski, Déborah Bossio, Kate M. Scow

и другие.

Frontiers in Environmental Science, Год журнала: 2020, Номер 8

Опубликована: Ноя. 13, 2020

Enhancing soil organic matter in agricultural soils has potential to contribute climate mitigation while also promoting health and resilience. However, carbon (C) sequestration projects are rare C markets. One concern surrounding is uncertainty regarding the permanence of newly sequestered C. This scientific exacerbated by differences terminology used scientists policymakers, which impedes integration new findings longevity into evidence-based policies. Here, we review evolution understanding lifespan language describe it both policy sectors. We find that recent have bearing on not part discussions policy, conversely, policymaker concerns clearly addressed research. From a perspective, generally assumed be vulnerable pool at risk being quickly lost via microbial degradation or other avenues physical loss if building practices maintained indefinitely. assumption been challenged advances demonstrating consumption transformation plant-derived actually necessary for long-term storage matter. argue can best understood as resulting from continual movement compounds throughout matrix, show this definition directly odds with how represented current Given interest policies promote activities, resolving these definitions critical. further identify priority areas future research order answer key questions about lifespan, help develop tools benchmarks assess efficacy efforts.

Язык: Английский

Процитировано

156
Increasing contribution of microbial residues to soil organic carbon in grassland restoration chronosequence DOI
Yang Yang, Yanxing Dou, Baorong Wang

и другие.

Soil Biology and Biochemistry, Год журнала: 2022, Номер 170, С. 108688 - 108688

Опубликована: Апрель 28, 2022

Язык: Английский

Процитировано

145
The role of plant input physical-chemical properties, and microbial and soil chemical diversity on the formation of particulate and mineral-associated organic matter DOI Creative Commons
Maurizio Cotrufo, Michelle L. Haddix, Marie Kroeger

и другие.

Soil Biology and Biochemistry, Год журнала: 2022, Номер 168, С. 108648 - 108648

Опубликована: Март 26, 2022

Язык: Английский

Процитировано

136
Depth‐dependent drivers of soil microbial necromass carbon across Tibetan alpine grasslands DOI

Mei He,

Kai Fang, Leiyi Chen

и другие.

Global Change Biology, Год журнала: 2021, Номер 28(3), С. 936 - 949

Опубликована: Ноя. 2, 2021

Microbial necromass carbon (C) has been considered an important contributor to persistent soil C pool. However, there still lacks large-scale systematic observations on microbial in different layers, particularly for alpine ecosystems. Besides, it is unclear whether the relative importance of biotic and abiotic variables such as plant input mineral properties regulating would change with depth. Based combination sampling along a ~2200 km transect across Tibetan grasslands biomarker analysis, together global data synthesis grassland ecosystems, we observed relatively low proportion microbial-derived compared (topsoil: 45.4% vs. 58.1%; subsoil: 41.7% 53.7%). We also found that major determinants depended In topsoil, both protection exerted dominant effects C. subsoil, physico-chemical provided by clay particles, iron-aluminum oxides, exchangeable calcium dominantly facilitated preservation The differential drivers over between depths should be Earth system models accurately forecasting dynamics its potential feedback warming.

Язык: Английский

Процитировано

135
Microbial Necromass in Soils—Linking Microbes to Soil Processes and Carbon Turnover DOI Creative Commons
Matthias Kästner, Anja Miltner, Sören Thiele‐Bruhn

и другие.

Frontiers in Environmental Science, Год журнала: 2021, Номер 9

Опубликована: Дек. 14, 2021

The organic matter of living plants is the precursor material stored in terrestrial soil ecosystems. Although a great deal knowledge exists on carbon turnover processes plant material, some (SOM) formation, particular from microbial necromass, are still not fully understood. Recent research showed that larger part original converted into biomass, while remaining modified by extracellular enzymes microbes. At end its life, biomass contributes to molecular imprint SOM as necromass with specific properties. Next appropriate environmental conditions, heterotrophic microorganisms require energy-containing substrates C, H, O, N, S, P, and many other elements for growth, which provided nutrients contained SOM. As easily degradable often scarce resources soil, we can hypothesize microbes optimize their energy use. Presumably, able mobilize building blocks (mono oligomers fatty acids, amino sugars, nucleotides) stoichiometry This contrast mobilizing only consuming new synthesis primary metabolites tricarboxylic acid cycle after complete degradation substrates. Microbial thus an important resource SOM, mining could be life strategy contributing priming effects providing growth cycles. Due needs microorganisms, conclude formation through depends flux. However, details variability use decay cycles yet understood linked fields science. Here, summarize current gain, use, decay, relevant processes, e. g. pump, C storage, stabilization. We highlight factors controlling contribution implications efficiency (CUE) identify process-based modelling understanding these various types under different climates.

Язык: Английский

Процитировано

130