Forest swamp succession alters organic carbon composition and survival strategies of soil microbial communities

Li, Jianwei; Zhao, Liyuan; Song, Chuantao; He, Chunguang; Bian, Hongfeng; Sheng, Lianxi

doi:10.1016/j.scitotenv.2023.166742

Cited by 6 publications

(2 citation statements)

References 66 publications

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“…Drying herbaceous roots and litter, characterized by low lignin and cellulose content, readily decompose 30 . Consequently, GS contribute more carbon to the substrate, expediting soil microbial community development and enhancing Rs 31 . These findings differ from those of Chen 32 , potentially attributable to our focus on slopes with gradients exceeding 65° (Table 1 ), where litter remains on shrubby and arboreal slopes due to gravity, wind, and rainfall, in contrast to plains where Chen conducted experiments.…”

Section: Discussionmentioning

confidence: 99%

Soil carbon emissions and influential factors across various stages of vegetation succession in vegetated concrete

Xu,

Luo,

et al. 2024

Sci Rep

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After ecological restoration of high and steep slopes in the project disturbed area, soil properties, soil microorganisms, litter types and root types change with the succession of vegetation cover communities. However, the effects of different vegetation successional stages on soil respiration dynamics remain unclear. To elucidate trends and drivers of soil respiration in the context of vegetation succession, we used spatio-temporal alternative applied research. Vegetated concrete-restored slopes (VC) with predominantly herbaceous (GS), shrub (SS), and arborvitae (AS) vegetation were selected, and naturally restored slopes (NS) were used as control. SRS1000 T soil carbon flux measurement system was used to monitor soil respiration rate. The results showed that soil respiration (RS) and fractions of all four treatments showed a single-peak curve, with peaks concentrated in July and August. During the succession of vegetation from herbaceous to arborvitae on VC slopes, RS showed a decreasing trend, and GS was significantly higher than AS by 45%; Compared to NS, RS was 29.81% and 21.56% higher in GS and SS successional stages, respectively, and 27.51% lower in AS stage. RS was significantly and positively correlated with nitrate nitrogen (NO3–-N) and microbial biomass nitrogen (MBN), both of which are important factors in regulating RS under vegetation succession. A bivariate model of soil temperature and water content explains the variability of Rs better. Overall, RS was higher than NS in the transition stage and lower than NS in the equilibrium stage of the vegetation community on VC slopes, and the RS decreases gradually with the vegetation succession of artificial ecological restoration slopes.

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Section: Discussionmentioning

confidence: 99%

Soil carbon emissions and influential factors across various stages of vegetation succession in vegetated concrete

Xu,

Luo,

et al. 2024

Sci Rep

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“…This pattern is refined by NMDS and PC analyses, which highlight significant separations in microbial community structures across different fire severities, indicating that even minimal burn conditions deviate markedly from unburned controls. In contrast, the subsoil layer follows a divergent path of microbial succession, characterized by slower recovery and deeper ecological shifts ( Li et al, 2023 ). The reduced direct impact of fire and subsequent environmental changes on this layer, coupled with the nutrient transfer dynamics from the topsoil, points to a prolonged period of ecological adjustment and microbial community reshaping ( Ling et al, 2021 ).…”

Section: Discussionmentioning

confidence: 99%

Microenvironment heterogeneity affected by anthropogenic wildfire-perturbed soil mediates bacterial community in Pinus tabulaeformis forests

Liu,

Gu,

Liu

et al. 2024

Front. Microbiol.

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IntroductionIn recent years, the frequency and intensity of anthropogenic wildfires have drastically increased, significantly altering terrestrial ecosystems worldwide. These fires not only devastate vegetative cover but also impact soil environments and microbial communities, affecting ecosystem structure and function. The extent to which fire severity, soil depth, and their interaction influence these effects remains unclear, particularly in Pinus tabulaeformis forests.MethodsThis study investigated the impact of wildfire intensity and soil stratification on soil physicochemical properties and microbial diversity within P. tabulaeformis forests in North China. Soil samples were collected from different fire severity zones (Control, Light, Moderate, High) and depths (topsoil: 0–10 cm; subsoil: 10–20 cm). Analyses included measurements of soil pH, organic carbon (SOC), total nitrogen (TN), and other nutrients. Microbial diversity was assessed using 16S rRNA gene sequencing.ResultsOur findings revealed significant variations in soil pH, SOC, TN, and other nutrients with fire severity and soil depth, profoundly affecting microbial community composition and diversity. Soil pH emerged as a critical determinant, closely linked to microbial α-diversity and community structure. We found that fire severity significantly altered soil pH (p = 0.001), pointing to noteworthy changes in acidity linked to varying severity levels. Topsoil microbial communities primarily differentiated between burned and unburned conditions, whereas subsoil layers showed more pronounced effects of fire severity on microbial structures. Analysis of bacterial phyla across different fire severity levels and soil depths revealed significant shifts in microbial communities. Proteobacteria consistently dominated across all conditions, indicating strong resilience, while Acidobacteriota and Actinobacteriota showed increased abundances in high-severity and light/moderate-severity areas, respectively. Verrucomicrobiota were more prevalent in control samples and decreased significantly in fire-impacted soils. Chloroflexi and Bacteroidota displayed increased abundance in moderate and high-severity areas, respectively. Correlation analyses illustrated significant relationships between soil environmental factors and dominant bacterial phyla. Soil organic carbon (SOC) showed positive correlations with total nitrogen (TN) and alkaline hydrolysable nitrogen (AN). Soil pH exhibited a negative correlation with multiple soil environmental factors. Soil pH and available phosphorus (AP) significantly influenced the abundance of the phylum Myxococcota. Soil water content (WC) significantly affected the abundances of Acidobacteriota and Actinobacteriota. Additionally, ammonium nitrogen (NH4+-N) and nitrate nitrogen (NO3−-N) jointly and significantly impacted the abundance of the phylum Chloroflexi.DiscussionThis study highlights the significant long-term effects of anthropogenic wildfires on soil microenvironment heterogeneity and bacterial community structure in P. tabulaeformis forests in North China, 6 years post-fire. Our findings demonstrate that fire severity significantly influences soil pH, which in turn affects soil nutrient dynamics and enhances microbial diversity. We observed notable shifts in the abundance of dominant bacterial phyla, emphasizing the critical role of soil pH and nutrient availability in shaping microbial communities. The results underscore the importance of soil stratification, as different soil layers showed varying responses to fire severity, highlighting the need for tailored management strategies. Future research should focus on long-term monitoring to further elucidate the temporal dynamics of soil microbial recovery and nutrient cycling following wildfires. Studies investigating the roles of specific microbial taxa in ecosystem resilience and their functional contributions under varying fire regimes will provide deeper insights. Additionally, exploring soil amendments and management practices aimed at optimizing pH and nutrient availability could enhance post-fire recovery processes, supporting sustainable ecosystem recovery and resilience.

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Soil properties, climate, and topography jointly determine plant community characteristics in marsh wetlands

Yuan,

Wang,

Liu

et al. 2024

J Plant Res

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Forest swamp succession alters organic carbon composition and survival strategies of soil microbial communities

Cited by 6 publications

References 66 publications

Soil carbon emissions and influential factors across various stages of vegetation succession in vegetated concrete

Soil carbon emissions and influential factors across various stages of vegetation succession in vegetated concrete

Microenvironment heterogeneity affected by anthropogenic wildfire-perturbed soil mediates bacterial community in Pinus tabulaeformis forests

Soil properties, climate, and topography jointly determine plant community characteristics in marsh wetlands

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