Litter-, soil- and C:N-stoichiometry-associated shifts in fungal communities along a subtropical forest succession

Bai, Zhongke; Wu, Xin; Lin, Junjie; Xie, Hongfeng; Yuan, Hai‐Sheng; Liang, Chao

doi:10.1016/j.catena.2019.03.037

Cited by 33 publications

(14 citation statements)

References 73 publications

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“…The findings of this study suggested that TSR was the key driver shaping soil fungal community diversity, with the path coefficient from plant diversity to soil microbial diversity greater for soil fungi than for bacteria (Figure 5). Previous studies have demonstrated that plant communities significantly affect soil microbial communities via litter chemical properties and root exudates [22,23,28]. The diversity of soil bacterial and fungal communities was affected by different successional stages [21,52].…”

Section: Discussionmentioning

confidence: 98%

“…In one study, soil properties rather than the plant community played the decisive part in shaping the soil microbial community [25], whereas in others, the plant community was decisive [26,27]. However, there is accumulating evidence that soil abiotic properties and plant community characteristics are simultaneously important in regulating soil microbial communities [2,28,29]. The composition and diversity of tree species can directly affect the functions of soil microbial communities by altering the quantity and quality of resources [23,30,31].…”

Section: Introductionmentioning

confidence: 99%

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Effects of Soil Properties and Plant Diversity on Soil Microbial Community Composition and Diversity during Secondary Succession

Shang

Huang

et al. 2021

Forests

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Soil microbial communities play an important role in maintaining the ecosystem during forest secondary succession. However, the underlying mechanisms that drive change in soil microbial community structures during secondary succession remain poorly defined in species-rich subtropical coniferous forests. In this study, Illumina high-throughput sequencing was used to analyze the variations in soil microbial community structures during forest secondary succession in subtropical coniferous forests in China. The role of soil properties and plant diversity in affecting soil bacterial and fungal communities was determined using random forest and structural equation models. Highly variable soil microbial diversity was observed in different stages of secondary succession. Bacterial community diversity rose from early to middle and late successional stages, whereas fungal community diversity increased from early to middle successional stages and then declined in the late stage. The relative abundance of Acidobacteria, Gemmatimonadetes, Eremiobacterota(WPS-2), Rokubacteria, and Mortierellomycota increased during succession, whereas the relative abundance of Ascomycota and Mucoromycota decreased. The community composition and diversity of the soil microbial community were remarkably influenced by plant diversity and soil properties. Notably, tree species richness (TSR) displayed a significant and direct correlation to the composition and diversity of both bacterial and fungal communities. The carbon-to-nitrogen (C:N) ratio had a direct impact on the bacterial community composition and diversity, and pH had a marked impact on the fungal community composition and diversity. Furthermore, succession stage and plant diversity indirectly impacted the composition and diversity of soil bacterial and fungal communities via soil properties. Overall, it can be concluded that soil intrinsic properties and plant diversity might jointly drive the changes in soil microbial community composition and diversity during secondary succession of subtropical coniferous forests.

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Section: Discussionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

Effects of Soil Properties and Plant Diversity on Soil Microbial Community Composition and Diversity during Secondary Succession

Shang

Huang

et al. 2021

Forests

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“…Forest type is considered to affect soil C concentrations through a variety of traits that are closely correlated with C sequestration, i.e., tree species, litter quality, and net primary production [19,21]. Needle and twig litter of lower quality (high C/N ratio, low nitrogen availability) from the coniferous forest have been considered to fix more C in soil organic matter compared with broadleaved litter [22,23].…”

Section: Introductionmentioning

confidence: 99%

Decreased Soil Organic Carbon under Litter Input in Three Subalpine Forests

Chen

Shen

Tan

et al. 2021

Forests

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Soil organic carbon (SOC) is the largest terrestrial organic carbon pool. Plant litter is an important source of SOC, but the knowledge gap between SOC fractions and plant litter input remains inconsistent. Here, a litter input control experiment was conducted at three subalpine forest types (coniferous forest, mixed forest, and broadleaved forest). We assessed the variations of total organic C, active organic C (easily oxidizable C, labile organic C), recalcitrant organic C, and microbial biomass C under litter input or removal. The results showed that soil total organic C decreased greatly under litter input. It was mainly caused by the change of easily oxidizable C and labile C, while the influence of recalcitrant C was small. At the same time, this effect varied among different forest types. Among them, the effect of litter input on SOC was weak and slow in the coniferous forest with low-quality litter input, while a quick effect was observed in the mixed and broadleaved forests with high-quality litter input. Microbial biomass C declined under litter input in most cases, and its variation was strongly controlled by soil temperature and freeze-thaw events. Overall, our results provide new evidence that forest type would strongly control SOC dynamics, in concert with litter quality shifts, with potential consequences for long-term C sequestration. We highlighted that litter input could reduce microbial biomass carbon which might limit the native SOC decomposition, but the loss of active C ultimately changed the SOC in the subalpine forests. It suggested that the interaction of multiple mechanisms should be considered in the study of SOC in this region.

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“…Even across climatic regions or ecosystems, changes in litter chemical traits can explain most of the differences in litter decomposition rate (Liu et al, 2015). Although vegetation restoration can also affect litter decomposition by changing the microenvironment (humidity, temperature, nutrient status, or soil microbial properties) (Bai et al, 2019;Zhang et al, 2013;Zhao et al, 2019), litter chemical traits can also reflect these indirect effects of changes in the decomposition environment and 'select' the decomposers that actually participate in litter decomposition Zhou et al, 2021). For instance, an increase in litter N/P ratio during vegetation restoration, which is indicative of increasing P limitations on litter decomposition, resulted indirectly from changes in the availability of soil nutrients (Yan et al, 2020).…”

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confidence: 99%

Changes in litter traits induced by vegetation restoration accelerate litter decomposition in Robinia pseudoacacia plantations

et al. 2021

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The chemical traits of litter are among the most critical factors that affect its decomposition. During vegetation restoration of planted forests, increasing age of the planted species and succession of the understory species may lead to significant changes in litter traits. However, it is unclear how these changes occur and how they affect litter decomposition. Therefore, we studied the decomposition of litter from four Robinia pseudoacacia plantations in the Loess Plateau in China with stand ages of 10-43 years using an indoor simulation test. We measured changes in litter substrate quality and chemical diversity, structural properties of the litter microbial community, activity of litter enzymes, and mixed decomposition effects during vegetation restoration. Their relationships to changes in litter decomposition rate were analyzed using structural equation modeling. Improvements in substrate quality of forest litter induced by vegetation restoration drove changes in fungal community composition during late decomposition (day 358), which in turn increased the activity of lignindecomposing enzymes and ultimately accelerated litter decomposition. At the same time, decreases in the chemical diversity of forest litter induced by vegetation restoration reduced the diversity of litter fungi during middle and late decomposition (days 182 and 358). This caused significant negative mixed decomposition effects, thereby inhibiting litter decomposition. However, improvements in litter substrate quality dominated the changes in litter decomposition rate, and the decomposition rate of R. pseudoacacia plantation litter thus increased over the course of vegetation restoration.

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Litter-, soil- and C:N-stoichiometry-associated shifts in fungal communities along a subtropical forest succession

Cited by 33 publications

References 73 publications

Effects of Soil Properties and Plant Diversity on Soil Microbial Community Composition and Diversity during Secondary Succession

Effects of Soil Properties and Plant Diversity on Soil Microbial Community Composition and Diversity during Secondary Succession

Decreased Soil Organic Carbon under Litter Input in Three Subalpine Forests

Changes in litter traits induced by vegetation restoration accelerate litter decomposition in Robinia pseudoacacia plantations

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