Biological soil crusts enhance the role of non-rainfall water in the water input in alpine sandy land ecosystems

Cheng, Long; Yue, Yan-Peng; Zhou, Hong; Fei, Bingqiang; Xiu, Xiaomin; Sun, Ying-Tao; Zhang, Lingguang; Wu, Bo; Yuan-shou, LI; Zhao, Xiuhai; Yang, Xiuben; Jia, Xiangping

doi:10.1016/j.jhydrol.2022.127966

Cited by 7 publications

(3 citation statements)

References 71 publications

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“…This finding was consistent with the results reported by Zhang et al (2018) . According to previous studies, in arid and semi-arid regions, water availability and soil nutrient content are the key limiting factors affecting microbial communities ( Yahdjian et al, 2011 ; Cheng et al, 2022 ). In the early stage of BSC formation, the bacterial community was restricted by water and nutrients.…”

Section: Discussionmentioning

confidence: 99%

“…Gonghe Basin, located in the northeastern part of the Qinghai-Tibet Plateau, forms an important ecological barrier in northwest China. Caragana microphylla is one of the most typical sandy shrubs found in the sandy land of Gonghe Basin and plays an important role in desertification control and biodiversity conservation ( Cheng et al, 2022 ). BSCs are widely distributed in the C. microphylla community.…”

Section: Introductionmentioning

confidence: 99%

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Biological soil crust development affects bacterial communities in the Caragana microphylla community in alpine sandy areas

Zhou

Li²,

Liu

2023

Front. Microbiol.

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IntroductionBiological soil crusts (BSCs) constitute a substantial portion of primary production in dryland ecosystems. They successionally mature to deliver a series of ecosystem services. Bacteria, as an important community in BSCs, play critical roles in maintaining the structure and functions of BSCs. However, the process by which bacterial diversity and community are altered with BSC development is not fully understood.MethodsIn this study, amplicons sequencing was used to investigate bacterial diversity and community compositions across five developmental stages of BSCs (bare sand, microbial crusts, algae crusts, lichen crusts, and moss crusts) and their relationship with environmental variables in the Gonghe basin sandy land in Qinghai-Tibet Plateau, northwestern China.ResultsThe results showed that Proteobacteria, Actinobacteria, Cyanobacteria, Acidobacteria, Bacteroidetes, and Firmicutes were predominant in different developmental stages of BSCs, accounting for more than 77% of the total relative abundance. The phyla of Acidobacteria and Bacteroidetes were abundant in this region. With BSC development, bacterial diversity significantly increased, and the taxonomic community composition significantly altered. The relative abundance of copiotrophic bacteria, such as Actinobacteria, Acidobacteria, Bacteroidetes, Verrucomicrobia, Planctomycetes, and Gemmatimonadetes significantly increased, whereas the relative abundance of oligotrophic bacteria, such as Proteobacteria and Firmicutes significantly decreased. The relative abundance of Cyanobacteria in the algae crusts was significantly higher than that in the other developmental stages (p < 0.05).ConclusionVariations in bacterial composition suggested that the potential ecological functions of the bacterial community were altered with BSC development. The functions varied from enhancing soil surface stability by promoting soil particle cementation in the early stages to promoting material circulation of the ecosystem by fixing carbon and nitrogen and decomposing litter in the later stages of BSC development. Bacterial community is a sensitive index of water and nutrient alterations during BSC development. SWC, pH value, TC, TOC, TN, NO3−, TP and soil texture were the primary environmental variables that promoted changes in the bacterial community composition of BSCs.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Biological soil crust development affects bacterial communities in the Caragana microphylla community in alpine sandy areas

Zhou

Li²,

Liu

2023

Front. Microbiol.

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“…China was one of the most vastly deserti cation countries in the world, there was 2.63 million km 2 of deserti ed land, which accounted for 27.3% of the total national territory. The lack of water resources and precipitation, high water dissipation severely restrict the ecological model and process of desert ecosystem (Cheng et al, 2022). Efforts to counter deserti cation had been initiated over the past few decades; however, only a small improvement had been arrived.…”

Section: Introductionmentioning

confidence: 99%

Performance of biological sand-fixing materials before and after inoculation on sandy desert surface

Tao¹,

Ren²,

Ren

2022

Preprint

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Aims Desert biocrust played an important role for the control of desertification. Artificial inoculation can promote the formation of biocrusts. The physiological and growth responses of the inoculated biological sand-fixing materials need to be clarified, and the results are of great significance for the artificial reproduction of desert biocrusts. Methods The chlorophyll-a, thickness and fresh weight of biological sand-fixing materials surface were investigated in order to assess the effecting of mixture ratio, cultivation and inoculation times, and water supply under laboratory conditions. Results The biological sand-sixing material mixed with cultivated algae crust and polymeric composites in 1:1 ratio demonstrated the best performance. Attapulgite clay could significantly promote the growth capacity and chlorophyll-a production of biological sand-fixing materials. The optimal biological sand-fixing material evidently accelerated the most accumulation of chlorophyll-a in 0.55 mg/kg, increase in 3.06 mm and growth of fresh biomass in 0.69 g/cm2, was the most beneficial to formation and development of artificial biocrust. The more water supply always significantly promoted the survival and growth of biological sand-fixing materials. Conclusion The optimally proportioned biological sand-fixing material obviously promoted the most growth and accumulation of chlorophyll-a and biomass under artificial cultivation and inoculation treatments. The most water supply always produced the most chlorophyll-a, thickness and fresh weight, so incubating biocrusts always provided more production of chlorophyll-a, higher thickness and more biomass under more water supply.

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Distribution and transformation characteristics of water vapor field in the fissured rock mass and its ecological significance

Su,

Zhou,

Feng

et al. 2024

Journal of Hydrology

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Biological soil crusts enhance the role of non-rainfall water in the water input in alpine sandy land ecosystems

Cited by 7 publications

References 71 publications

Biological soil crust development affects bacterial communities in the Caragana microphylla community in alpine sandy areas

Biological soil crust development affects bacterial communities in the Caragana microphylla community in alpine sandy areas

Performance of biological sand-fixing materials before and after inoculation on sandy desert surface

Distribution and transformation characteristics of water vapor field in the fissured rock mass and its ecological significance

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