Ecological stoichiometric characteristics of soil-moss C, N, and P in restoration stages of karst rocky desertification

Meng, Wenping; Dai, Quanhou; Ren, Qingqing; Tu, Na; Leng, Tingjiao

doi:10.1371/journal.pone.0252838

Cited by 8 publications

(8 citation statements)

References 30 publications

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“…Due to the different constituent substances in different particle size aggregates, their maintenance and supply roles in carbon, nitrogen and phosphorus nutrient cycling are different [38]. In this study, the SOC, TN, and TP contents were the highest in WRT, which is consistent with the research results of Meng et al [39]. Furthermore, the contents of SOC and TN in the soil aggregates of W, RT, WRT, RTR and WR were significantly higher than those in C, indicating that the vegetation restoration measures implemented in the study area have effectively improved the ability of soil to retain carbon and nitrogen by increasing the vegetation coverage and increasing the source of organic matter.…”

Section: Responses Of Soil Aggregate Nutrients and Enzymesupporting

confidence: 91%

Effects of Planting Patterns on Soil Aggregates and Enzyme Activities in Rocky Desertification Areas of Karst Plateau Mountains

Yang¹,

Zhu²,

Chen³

2022

Pol. J. Environ. Stud.

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Soil aggregate characteristics and enzyme activities are key to the sustainable development of soil quality management. However, there are presently few studies on soil aggregate nutrients, enzyme activities, and their driving factors in areas with karst rocky desertification. As such, this study investigated the effects of planting patterns on soil aggregate nutrients and soil enzyme activities under six typical planting patterns (walnut, Rosa roxburghii Tratt, ryegrass, walnut-Rosa roxburghii Tratt, Rosa roxburghii Tratt-ryegrass and walnut-ryegrass) in the karst rocky desertification area of plateau mountains. The results indicated that: (1) there were significant differences in soil aggregate nutrients and soil enzyme activities among the different plots, when compared to traditional farmland, the increase in the aggregate nutrient content and soil enzyme activities was most noticeable in walnut-Rosa roxburghii Tratt, Rosa roxburghii Tratt-ryegrass, and walnut-ryegrass, and the nutrients gradually increased as the aggregate particle size decreased. The maximum C:N and C:P ratios were measured in the 0.25-2 mm aggregates, while the maximum N:P ratios was measured occurred in the <0.053 mm aggregates. (2) The stoichiometric ratios had different degrees of relevance associated with the aggregate nutrients, TN and C:N, SOC and C:P, and TP and N:P showed extremely significant linear correlations. Moreover, a significant correlation also occurred between enzyme activity and aggregate nutrients, particularly in macroaggregates. (3) Soil physicochemical properties, such as the soil total porosity, capillary water holding capacity, saturated hydraulic conductivity, bulk density and pH, had a direct influence on enzyme activity, therefore, the soil condition can be improved by changing the planting patterns to promote enzyme activity. These findings are helpful for the optimal allocation of forest and grass for the comprehensive control of karst rocky desertification.

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Section: Responses Of Soil Aggregate Nutrients and Enzymesupporting

confidence: 91%

Effects of Planting Patterns on Soil Aggregates and Enzyme Activities in Rocky Desertification Areas of Karst Plateau Mountains

Yang¹,

Zhu²,

Chen³

2022

Pol. J. Environ. Stud.

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“…While the number of Bacteria in Eurohypnum leptothallum was the highest.It shows that there are interspeci c differences in microbial diversity and community composition in lithophytic bryophytes.The composition of moss-associated bacterial communities may be driven by host identity [21], the characteristics of bryophyte gametophytes and secondary metabolism [22][23]. These changes may affect the composition of the moss microbiome [24].Hyophila involute like to grow on bare rock surfaces or crevices in karst rocky deserti cation areas [25]. The characteristics of this rocky habitat are strong sunlight on sunny days, high temperature on the rock surface, low air humidity, rapid water loss on the rock surface during rainfall, and poor water retention.…”

Section: Discussionmentioning

confidence: 99%

Microbial differences in the habitats of lithophytic bryophytes and their relationship with soil nutrients

Meng,

Jingcheng,

Zhang

et al. 2024

Preprint

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Background:Lithophytic Bryophyte is a pioneer plant on the exposed rock surface in karst area,and they can alter the microorganisms in the rock habitat. Results:At the species level, the number of species of various microorganisms in the habitat after the rocky moss was planted on the rock surface was Fungi 235, Bacteria 20535, Eukaryota 816, Archaea 503, and Viruses 155, respectively. Compared with the original control soil, the growth of various microorganisms was Fungi 52%, Bacteria 11%, Eukaryota 78%, Archaea 27%, and Viruses 146%. The number of microbial species related to carbon fixation was 2779, nitrogen fixation was 1502, phosphorus metabolism was 1750.Compared with the original control soil, the bryophytes increased by 37%, 49% and 53% respectively after planting the rock surface. Compared with the original soil, the exposed rock surface increased by 20%, nitrogen fixation by 28% and phosphorus metabolism by 31%.Microbial species with significant differences between groups,Acidimimicrobia_bacterium,Acidimimicrobiaceae_bacterium,Acidimimicrobiales_bacterium, Iamiaceae_bacterium_SCSIO_58843 is significantly positively correlated with potassium content in soil,Microcoleus_Sp._PCC_7113 is a significant negative correlated with potassium content in soil.Alphaprotoobjective_bacterium, Solirubrobacteriales_bacterium, Betaproteobjective_bacterium is a significant positive correlated with succinic acid content in soil.Chloroflexi_bacterium is a significant positive correlated with oxalic acid content insoil.Acidobacteria_bacterium,Solirubrobacterales_bacterium,Acidimicrobiaceae_bacterium is a significant negative correlated with malic acid in soil.Gemmatimonadetes_bacterium is a significant negative correlated with oxalic acid. Smaragdicoccus_niigatensis,Gemmatimonadetes_bacterium,Nocardiaceae_bacterium_YC2-7 is significantly negatively correlated with succinic acid in soil. Solirubrobacterales_bacterium,Archangium_gephyra is a significant negative correlated with acetic acid in soil. Conclusions:The lithophytic bryophytes changed the microbial composition structure in the rock surface habitat, significantly increased the number of functional microorganisms, and then increased the accumulation of potassium, phosphorus, organic carbon and malic acid in the habitat, and promoted the positive development of the rock surface ecosystem.

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“…Another study examined the effects of N addition on C:N:P stoichiometry and moss crust‐soil continuum in the same desert (Liu et al, 2020). Meng et al (2021) explored ecological stoichiometric characteristics of soil‐moss C, N, and P during stages of the restoration of a rocky area that was undergoing desertification. Although most studies have focused on the relationship between soil and naturally developed biocrusts (i.e., moss crusts), the relationships between soil and IBSC, particularly incubated cyanobacteria crusts, C, N, and P stoichiometry, however, remain unclear; therefore, understanding the effects of soil C:N:P stoichiometric ratios on the establishment of IBSC is vital to improving the restoration of ecosystem function in drylands.…”

Section: Introductionmentioning

confidence: 99%

“…Another study examined the effects of N addition on C:N:P stoichiometry and moss crust-soil continuum in the same desert (Liu et al, 2020). Meng et al (2021) Ledeb. and Stipa breviflora Griseb.…”

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confidence: 99%

Soil C:N and C:P ratios positively influence colonization and development of incubated biocrusts in a sandy desert environment

Zhao,

et al. 2023

Land Degrad Dev

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Over the past few years, incubated biocrusts (IBSC)—the inoculation of soil/sand with cyanobacteria, moss, and lichen—have become one of the most promising biotechnological strategies for preventing soil erosion and restoring soil function in degraded drylands. Soil nutrient content (C, N, and P) is one of the key factors that influences IBSC colonization and development; however, the effects of soil C:N, C:P, and N:P stoichiometric ratios on the colonization and development of IBSC in desert environments are little known. We used four soil substrates, collected from four areas on the southeastern edge of the Tengger Desert, China, to incubate biocrusts. The four substrates differed in particle size and nutrient content. We flattened the dunes so their sand surfaces were level before covering them with soil substrates. We used a fully factorial design with four soil substrates and with and without biocrust additions, generating a total of 12 different treatments. The soil substrates differed in C, N, and P content and C:N, C:P, and N:P stoichiometric ratios. We measured IBSC coverage and thickness to establish relationships between IBSC characteristics and soil C:N, C:P, and N:P stoichiometric ratios. After 12 months of development, all treatments had significantly more cyanobacteria coverage, lichen coverage, and total coverage of IBSC than did control plots, which had little or no IBSC development. C:N and C:P ratios were significantly positively related to cyanobacteria coverage and total coverage of IBSC. Soil C:N and C:P ratios were mainly controlled by soil C; C limitation was greater than N and P limitation. Our study indicates that increasing initial soil substrate C content to improve C:N and C:P ratios will help the recovery of biocrusts and IBSC colonization. We demonstrate that stoichiometric ratios of soil should be a concern when assessing IBSC restoration treatments and when using IBSC to restore degraded land, especially at large scales.

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Ecological stoichiometric characteristics of soil-moss C, N, and P in restoration stages of karst rocky desertification

Cited by 8 publications

References 30 publications

Effects of Planting Patterns on Soil Aggregates and Enzyme Activities in Rocky Desertification Areas of Karst Plateau Mountains

Effects of Planting Patterns on Soil Aggregates and Enzyme Activities in Rocky Desertification Areas of Karst Plateau Mountains

Microbial differences in the habitats of lithophytic bryophytes and their relationship with soil nutrients

Soil C:N and C:P ratios positively influence colonization and development of incubated biocrusts in a sandy desert environment

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