Aggregate Size Mediated the Changes in Soil Microbial Communities After the Afforestation of a Former Dryland in Northwestern China DOI Creative Commons
Deming Zhang, Ling Bai, Wei Wang

et al.

Diversity, Journal Year: 2024, Volume and Issue: 16(11), P. 696 - 696

Published: Nov. 13, 2024

Although the afforestation of former arable lands is a common global land-use conversion, its impact on soil microbial communities at aggregate scale has not been adequately addressed. In this study, samples were categorized into large macroaggregates (LM, >2 mm), small (SM, 2–0.25 and microaggregates (MI, <0.25 mm) to assess changes in composition, diversity, network complexity, stability within aggregates after dryland northwestern China. The results revealed that enhanced relative abundance Actinobacteriota, Chloroflexi, Ascomycota, Mortierellomycota aggregates, suggesting these phyla may have greater advantages post-afforestation. Shannon–Wiener Pielou indices for bacterial showed no significant differences between types across all fractions. However, alpha diversity fungal LM SM significantly increased afforestation. Bray–Curtis dissimilarity altered beta MI but had minimal three topological features cross-kingdom co-occurrence networks generally exhibited decreasing trend post-afforestation, indicating simplification community structure. reduced robustness fractions implies also destabilized structure macroaggregates. composition correlated closely with carbon nitrogen contents, especially two macroaggregate linkages suggests improved resource conditions could be key driver behind shifts following Our findings indicate ecology can better understood by fractionation.

Language: Английский

Differential contributions of microbial necromass to humic acid during composting of organic wastes DOI
Wenjie Chen, Yang Yan, Xia Liang

et al.

Environmental Research, Journal Year: 2025, Volume and Issue: unknown, P. 121036 - 121036

Published: Feb. 1, 2025

Language: Английский

Citations

0
Nitrogen-induced acidification increases soil organic carbon accrual by promoting particulate organic carbon and microbial necromass under long-term experiment in the paddy soils of East China DOI
Zhaoming Chen, Qiang Wang,

Jinchuan Ma

et al.

Research Square (Research Square), Journal Year: 2025, Volume and Issue: unknown

Published: March 27, 2025

Abstract Background and aims Nitrogen (N) addition can substantially affect soil carbon cycling in agroecosystems. Microbial necromass (MNC) is widely recognized as a key contributor to organic C (SOC) fractions. However, the mechanisms underlying responses of MNC SOC fractions N fertilization paddy soils remain unclear. Methods A field experiment with four rates, namely, 0, 300, 450, 600 kg ha–1 yr–1 was conducted determine effects on fractions, microbial (MNC), enzyme activity, biomass rice–wheat rotation. Results increased POC concentrations by 2.88–8.41% 14.6–41.2%, respectively, but did not MAOC. The ratio MAOC reduced addition, indicating that decreased stability. concentration 7.32–22.5% its contribution 4.14–13.7%. activity β-1,4-N-acetyl-glucosaminidase decreased, while activities leucine amino peptidase acid phosphatase were under P addition. Structural equation modeling random forest revealed N-induced decrease pH promoted accrual increasing root biomass, consequently improving POC. Conclusions likely more vulnerable than acidification primary driver for promoting soils.

Language: Английский

Citations

0
Aggregate Size Mediated the Changes in Soil Microbial Communities After the Afforestation of a Former Dryland in Northwestern China DOI Creative Commons
Deming Zhang, Ling Bai, Wei Wang

et al.

Diversity, Journal Year: 2024, Volume and Issue: 16(11), P. 696 - 696

Published: Nov. 13, 2024

Although the afforestation of former arable lands is a common global land-use conversion, its impact on soil microbial communities at aggregate scale has not been adequately addressed. In this study, samples were categorized into large macroaggregates (LM, >2 mm), small (SM, 2–0.25 and microaggregates (MI, <0.25 mm) to assess changes in composition, diversity, network complexity, stability within aggregates after dryland northwestern China. The results revealed that enhanced relative abundance Actinobacteriota, Chloroflexi, Ascomycota, Mortierellomycota aggregates, suggesting these phyla may have greater advantages post-afforestation. Shannon–Wiener Pielou indices for bacterial showed no significant differences between types across all fractions. However, alpha diversity fungal LM SM significantly increased afforestation. Bray–Curtis dissimilarity altered beta MI but had minimal three topological features cross-kingdom co-occurrence networks generally exhibited decreasing trend post-afforestation, indicating simplification community structure. reduced robustness fractions implies also destabilized structure macroaggregates. composition correlated closely with carbon nitrogen contents, especially two macroaggregate linkages suggests improved resource conditions could be key driver behind shifts following Our findings indicate ecology can better understood by fractionation.

Language: Английский

Citations

1