Soil cellulase activity and fungal community responses to wetland degradation in the Zoige Plateau, China

Wu, Lisha; Su, Feng; Nie, Ya; Zhou, Jianhong; Yang, Zhipeng; Zhang, Jie

doi:10.1007/s11629-014-3183-1

Cited by 30 publications

(16 citation statements)

References 36 publications

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“…An increase in soil pH was also observed in the Jiuduansha wetlands along with the degradation stages (Tang et al, 2011). Changes in soil pH, moisture, and nutrient status caused by wetland degradation may alter microbial diversity and assemblies (Wu et al, 2015(Wu et al, , 2021Zhao et al, 2021).…”

Section: Introductionmentioning

confidence: 95%

“…The microbial community is closely associated with ecological functioning of soil microbes, because of the diverse functions provided by the different microbial species (Crowther et al, 2019). The diversity of microbial communities has a positive impact on element cycling, nutrient uptake, organic matter decomposition, and toxin removal (Tang et al, 2011;Wu et al, 2015). The microbial community also contributes to soil structure regulation, soil formation and plant productivity (Zhang et al, 2013;Gao et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

“…However, over 50% of global wetlands have suffered threatens from human activity and climate change, and this has caused substantial declines in their area and in the degradation of ecosystem functions (Sica et al, 2016;Jiang et al, 2017;Khaledian et al, 2017). Previous studies have revealed that the wetland degradation may lead to a succession of wetland ecosystems, such as marsh degradation into meadow, grassland, and even desert (Ren et al, 2013;Wu et al, 2015). Wetland ecosystem degradation can occur along with water table drawdown, changes in soil properties, vegetation degradation, and soil organic matter mineralization (Wu et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

“…There is a total area of 13.19 × 10 4 km 2 of alpine wetland across the Tibetan Plateau. This region is crucial for water conservation and climate regulation in China (Wu et al, 2015;Yan et al, 2021). Alpine wetlands are fragile ecosystems characterized by high altitudes and low temperatures.…”

Section: Introductionmentioning

confidence: 99%

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Soil Water Content Shapes Microbial Community Along Gradients of Wetland Degradation on the Tibetan Plateau

Zhang

Yan

et al. 2022

Front. Microbiol.

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Soil microbes are important components in element cycling and nutrient supply for the development of alpine ecosystems. However, the development of microbial community compositions and networks in the context of alpine wetland degradation is unclear. We applied high-throughput 16S rRNA gene amplicon sequencing to track changes in microbial communities along degradation gradients from typical alpine wetland (W), to wet meadow (WM), to typical meadow (M), to grassland (G), and to desert (D) in the Zoige alpine wetland region on the Tibetan Plateau. Soil water content (SWC) decreased as wetland degradation progressed (79.4 and 9.3% in W and D soils, respectively). Total organic carbon (TOC), total nitrogen (TN), and total phosphorus (TP) increased in the soils of WM, and then decreased with alpine wetlands degradation from WM to the soils of M, G, and D, respectively. Wetland degradation did not affect microbial community richness and diversity from W soils to WM, M, and G soils, but did affect richness and diversity in D soils. Microbial community structure was strongly affected by wetland degradation, mainly due to changes in SWC, TOC, TN, and TP. SWC was the primary soil physicochemical property influencing microbial community compositions and networks. In wetland degradation areas, Actinobacteriota, Acidobacteriota, Cholorflexi, and Proteovacteria closely interacted in the microbial network. Compared to soils of W, WM, and M, Actinobacteriota played an important role in the microbial co-occurrence network of the G and D soils. This research contributes to our understanding of how microbial community composition and networks change with varied soil properties during degradation of different alpine wetlands.

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Section: Introductionmentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Soil Water Content Shapes Microbial Community Along Gradients of Wetland Degradation on the Tibetan Plateau

Zhang

Yan

et al. 2022

Front. Microbiol.

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“…On the one hand, these labile C may stimulate microbial mineralisation of old C (Hoosbeek et al 2004); on the other hand, these labile C can promote the formation of fresh recalcitrant C (Ahmed et al 2016). However, microorganism and enzyme activities in the subsurface soil are considerably lower than those in topsoil (Tang et al 2012;Wu et al 2015). Thus, the input of fresh labile C into subsoil mainly converts to the less reactive recalcitrant C. Similar to the wetland soils of the Ili River valley, China (Liu et al 2017), the concentrations of all SOC fractions decreased with soil depth in the MDM, HDM and SDM (P < 0.05; Fig.…”

Section: Effect Of Marsh Degradation On Soc Fractions In the Soil Promentioning

confidence: 99%

Response of the Organic Carbon Fractions and Stability of Soil to Alpine Marsh Degradation in Zoige, East Qinghai-Tibet Plateau

Zhang

et al. 2020

J Soil Sci Plant Nutr

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Soil organic carbon (SOC) fractions play a crucial role in the carbon cycle of alpine wetland ecosystems and regional climate regulation. In the last decades, alpine marshes at Tibetan Plateau have undergone increased degradation. The effects of marsh degradation on soil labile and recalcitrant organic carbon fractions and on SOC stability remain unclear. In this study, we investigated changes in SOC fractions with different biochemical recalcitrance and stability in the marsh ecosystems with various levels of degradation in the Zoige Wetland, Eastern Qinghai-Tibet Plateau. Soil samples of relatively pristine marsh (RPM), lightly degraded marsh (LDM), moderately degraded marsh (MDM), heavily degraded marsh (HDM) and severely degraded marsh (SDM) were collected and analysed using the acid hydrolysis method. Compared with RPM, the concentrations of SOC labile fraction I (non-cellulosic polysaccharides), SOC labile fraction II (cellulose) and recalcitrant organic carbon (ROC) in degraded marshes decreased significantly: 29-97, 38-95 and 32-99%, respectively, except for the LDM. The SOC recalcitrance index (RIc) in the HDM and SDM was significantly lower than that in RPM by 11-35 and 15-47%, respectively; compared with RPM, the stability of organic carbon was significantly lower in the HDM and SDM. Additionally, the marsh degradation increased vertical variation in the concentrations of SOC fractions. The degradation of alpine marshes decreases the capacity for carbon (C) sequestration via decreasing the resistance of SOC to biodegradation, indicating that the alpine marsh degradation may weaken the carbon sink capacity of the Zoige Plateau, thus aggravating the global greenhouse effect. Keywords Zoige. Marsh degradation. Labile organic carbon. Recalcitrant organic carbon. Soil organic carbon stability Highlights • Concentrations of labile and recalcitrant SOC decreased with marsh degradation. • Vertical variation in labile and recalcitrant SOC increased in degraded marshes. • Resistance of SOC to biodegradation decreased after marsh was moderately degraded. • Marsh degradation reduced the capacity of SOC sequestration.

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Transformation of phosphorus forms and its regulation on phosphorus availability across differently degraded marsh soils

Pu,

Luo,

Zhang

et al. 2023

Land Degrad Dev

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Soil phosphorus (P) is a vital nutrient that controls wetland productivity and ecological functions. However, the effects of soil P forms on P availability during wetland degradation are relatively unknown. We selected differently degraded marshes, including non‐degraded marsh (NDM), lightly degraded marsh (LDM), moderately degraded marsh (MDM), and heavily degraded marsh (HDM), to research the changes in soil P forms by sequential chemical extraction and its regulation on P availability in the Zoige Plateau, China. The results showed that compared with the 0–30 cm soil layers of NDM, the main changes in total P concentration were a significant increase of 31.6%–44.2% in LDM and MDM, and the available P concentration increased by 28.7%–76.2% in LDM and MDM but decreased by 4.0%–47.5% in HDM with a lower P activation coefficient. Marsh degradation increased the concentration of soil dicalcium phosphates, P occluded in iron hydroxides, and organic P from the entire profile by 46.7%–137.7%, 31.7%–49.3%, and 78.1%–82.1%, respectively, while it decreased that of iron oxide surface adsorbed P and apatite P by 17.2%–32.2% and 15.3%–27.8%, respectively. Soil available P was mainly related to organic P and P non‐occluded in iron oxide minerals, which might also be a non‐negligible direct source of available P. The transformation from apatite P to organic P was an important regulatory mechanism of P availability in soils during marsh degradation. This study revealed the transformation trajectory of soil P forms owing to soil desiccation accompanied by plant community changes and overgrazing during alpine marsh degradation, and the risk of P limitation in HDMs with low soil available P. For degraded marsh restoration, some measures for improving P availability should be implemented in the future, such as grazing exclusion and the application of organic fertilizer.

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Soil cellulase activity and fungal community responses to wetland degradation in the Zoige Plateau, China

Abstract: sandy) in t with the sev of wetland abundance activity wer using D Electrophor and 3,5-din and abunda parallel to t to most dis shift in com 4 soil types Water con nitrogen (T nitrogen (A strongly co structure a The result properties ( activity, an communitie level of wetl

Cited by 30 publications

References 36 publications

Soil Water Content Shapes Microbial Community Along Gradients of Wetland Degradation on the Tibetan Plateau

Soil Water Content Shapes Microbial Community Along Gradients of Wetland Degradation on the Tibetan Plateau

Response of the Organic Carbon Fractions and Stability of Soil to Alpine Marsh Degradation in Zoige, East Qinghai-Tibet Plateau

Transformation of phosphorus forms and its regulation on phosphorus availability across differently degraded marsh soils

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