Functional Diversity and CO2 Emission Characteristics of Soil Bacteria during the Succession of Halophyte Vegetation in the Yellow River Delta

Yu, Xiubo; Ji, Linhui; Wang, Zihao; Li, Kun; Xu, Xiaoya; Guo, Dufa

doi:10.3390/ijerph191912919

Cited by 7 publications

(4 citation statements)

References 77 publications

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“…In the first-order metabolic pathway, metabolism has the highest abundance, followed by environmental information processing. Metabolism is still the core function of bacteria, which is consistent with the results of Xin et al and Chen Yanyun et al [57,58]. The secondary metabolic pathways mainly include membrane transport, carbohydrate metabolism, amino acid metabolism, signal transduction, energy metabolism, metabolism of cofactor and vitamin, nucleotide metabolism, etc.…”

Section: Effects Of Habitat Heterogeneity On the Functional Structure...supporting

confidence: 85%

Effect of Karst Microhabitats on the Structure and Function of the Rhizosphere Soil Microbial Community of Rhododendron pudingense

et al. 2023

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Soil microbes play an important role in the microbial circulation and energy flow of ecosystems. In order to understand the change in the rhizosphere soil microbial community structure and function in the heterogeneous karst habitats, the nutrient content and enzyme activity were analyzed, and Illumina MiSeq high-throughput sequencing technology was used to detect the composition, quantity and functional types of the rhizosphere soil microbial community in Rhododendron pudingense under three kinds of karst microhabitats (soil surface, rock gully and rock surface) in Wangmo Country (WM), Zhenning Country (ZN) and Qinglong Country (QL). The results showed that SS and RG microhabitats had a higher nutrient content and enzyme activity, while RS had the lowest. At the phylum level, Proteobacteria and Actinomycetes were dominant in terms of bacteria, while Ascomycota and Basidiomycotina were dominant in terms of fungi. There was no significant difference in microbial diversity among different karst microhabitats (p > 0.05). At the microbial genus level, there were some differences in species composition among the three karst microhabitats, which may lead to soil heterogeneity in karst microhabitats. WM was a little different from ZN and QL. The results of PCoA showed that the community composition of RG and RS was more similar to that of SS. There was no significant difference in microbial functional types among different microhabitats (p > 0.05). Only the abundance of pathothoph-symbiothoph fungi in RG was significantly higher than that in RS (p < 0.05). The main function of bacteria was metabolism, and saprophytic and symbiotic fungi were the dominant fungal group. In conclusion, soil organic carbon and alkaline phosphatase are important factors affecting the level distribution of microflora in different karst microhabitats. R. pudingense in the SS and RG microhabitats has better soil conditions, which may require protection for the plants in the RS microhabitat. The current study results can provide a theoretical basis for the adaptation mechanism of Rhododendron pudingense to the karst microhabitat.

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Section: Effects Of Habitat Heterogeneity On the Functional Structure...supporting

confidence: 85%

Effect of Karst Microhabitats on the Structure and Function of the Rhizosphere Soil Microbial Community of Rhododendron pudingense

et al. 2023

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“…At both soil depths, nucleotide metabolism, related to cell homeostasis, was enriched in grassland, while energy metabolism, metabolisms of the cofactors and vitamins, and the translation and metabolism of terpenoids and polyketides were significantly increased with the succession (Figure 5). This was due to the changes in composition and diversity of the bacterial communities in the soil caused by vegetation succession affecting the soil bacterial ecological functions [54,55]. It has been previously documented that, with vegetation succession, the improvement in soil nutrients might increase the soil bacterial functional diversity [56].…”

Section: Changes In Ecological Function Of Soil Microbial Communities...mentioning

confidence: 99%

Changes in Community Structure and Functional Characteristics of Soil Bacteria and Fungi along Karst Vegetation Succession

Li,

Tang,

Yuan

et al. 2023

Forests

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Soil microbes are a crucial component of karst ecosystems, and exploring their community changes during succession can help to elucidate the mechanisms driving succession dynamics. However, the variation of soil microbial communities during vegetation succession in karst ecosystems is still poorly understood. We studied the variations in community structure and potential functions of soil microbes within the four successional stages of grassland (GL), shrubland (SL), secondary forest (SF), and primary forest (PF) for the topsoil (0–10 cm) and subsoil (10–20 cm) in a karst area using high-throughput sequencing. The research findings showed that the bacterial and fungal community diversity and composition changed more obviously in the topsoil than in the subsoil across the succession. With vegetation succession, the structural and functional characteristics of soil bacterial and fungal communities show different trends, with soil fungal communities having a greater response to successional stage changes. Actinobacteria and Acidobacteria were dominant in secondary and primary forests, respectively, while Bacteroidetes was prevalent in grassland. However, the change in Proteobacteria was not significant at both soil depths. Ascomycota was the dominant phylum of soil fungi throughout the succession. The function of soil bacteria was mainly carbohydrate metabolism, which had the highest proportion in the shrubland at different soil depths. The dominant fungal functional groups were saprotroph, pathotroph, and pathotroph–saprotroph. The soil bacterial communities were observably affected by soil organic carbon, total nitrogen, total potassium, ammonia nitrogen, nitrate nitrogen, and leucine aminopeptidase, among which soil organic carbon, ammonia nitrogen, and leucine aminopeptidase mainly influenced the bacterial community in the topsoil, while nitrate nitrogen chiefly influenced the bacterial community in the subsoil. The soil fungal community was only significantly affected by soil organic carbon. Collectively, these results indicate that the effects of vegetation succession on soil microbial communities are largely driven by successional stage and soil properties, with soil fungi being more susceptible to the vegetation successional stage and soil bacteria being more sensitive to the soil properties. During this process, soil bacterial and fungal communities follow different succession patterns.

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“…Soil CO 2 emission rates were calculated based on the changes in the gas concentrations over time. Soil cumulative CO 2 emissions were calculated based on the existing methods [40].…”

Section: Experimental Design and Measurement Of Soil Co 2 Emissionsmentioning

confidence: 99%

Effects of Biochar and Organic Additives on CO2 Emissions and the Microbial Community at Two Water Saturations in Saline–Alkaline Soil

Zhang

Jiang

et al. 2023

Agronomy

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The nutrient-limiting conditions in saline–alkali soil as well as the salinity and alkalinity stress are successfully alleviated by water management measures and the addition of organic matter. However, the impacts of these two strategies on the microbe-driven CO2 emissions in saline–alkaline soils are not yet clear. Therefore, a 150-day incubation experiment was conducted in this study to evaluate the short-term effects of water regulation and the addition of organic matter with different characteristics on CO2 emissions and microbial community characteristics in saline–alkali soils under non-flooding conditions. This study was conducted at two water saturations, i.e., 50% WFPS and 80% WFPS. In addition, five organic matter treatments were conducted: CK: control; N: urea; SN: Straw + urea; SNH: Straw + urea + microbial agent; and SNB: Straw + urea + biochar. The results demonstrated that compared with 50% WFPS, 80% WFPS significantly increased cumulative CO2 emission by 27.66%, but significantly decreased salt content and the fungal Chao1 and Shannon indices. The application of the biochar and microbial agent decreased the cumulative CO2 emissions of the SN treatment by 27.39% and 14.92%, respectively. When sufficient carbon supply is available, the decrease in fungal diversity may reduce CO2 emission. The findings demonstrated that SNH and SNB at 80% WFPS might decrease CO2 emissions under straw carbon intake as well as the loss of labile organic carbon (LOC). Additionally, these treatments can alleviate microbial stress caused by salinity, which has a favorable impact on enhancing carbon storage in salinity-affected dryland soils.

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Functional Diversity and CO2 Emission Characteristics of Soil Bacteria during the Succession of Halophyte Vegetation in the Yellow River Delta

Cited by 7 publications

References 77 publications

Effect of Karst Microhabitats on the Structure and Function of the Rhizosphere Soil Microbial Community of Rhododendron pudingense

Effect of Karst Microhabitats on the Structure and Function of the Rhizosphere Soil Microbial Community of Rhododendron pudingense

Changes in Community Structure and Functional Characteristics of Soil Bacteria and Fungi along Karst Vegetation Succession

Effects of Biochar and Organic Additives on CO2 Emissions and the Microbial Community at Two Water Saturations in Saline–Alkaline Soil

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