Effects of Climate on Variation of Soil Organic Carbon and Alkali-Hydrolyzed Nitrogen in Subtropical Forests: A Case Study of Zhejiang Province, China

Forests, Journal Year: 2023, Volume and Issue: 14(5), P. 914 - 914

Published: April 28, 2023

Subtropical forests play an important role in the global carbon cycle and climate change mitigation. In order to understand effects of factors on soil subtropical forest ecosystems, it is necessary make full use sequestration potential. Soil organic (SOC) alkali-hydrolyzed nitrogen (SAN) were tested 255 plots Zhejiang Province, their reserves from 2020 Province compared with those 2010. The results showed that SOC content significantly increased, but SAN decreased over ten years. Combined random (RF) correlation analysis, contribution different (temperature, precipitation, etc.) storage was analyzed, main driving evaluated. RF model explained winter (December February) spring (March May) most dominant drivers 0–10 cm 10–30 increases SOC. There a significant positive between precipitation accumulation (0–30 cm) during spring. minimum temperatures summer (June August) autumn (September November) negatively correlated cm). Increasing or irrigation (cloud seeding) could improve capacity soils. This study provides new perspective sensitivity potential response ecosystems.

Language: Английский

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Association between Soil Physicochemical Properties and Bacterial Community Structure in Diverse Forest Ecosystems

Microorganisms, Journal Year: 2024, Volume and Issue: 12(4), P. 728 - 728

Published: April 3, 2024

Although the importance of soil bacterial community for ecosystem functions has long been recognized, there is still a limited understanding associations between its composition, structure, co-occurrence patterns, and physicochemical properties. The objectives present study were to explore association properties diversity, network topological features, assembly mechanisms community. Four typical forest types from Liziping Nature Reserve, representing evergreen coniferous forest, deciduous mixed conifer-broadleaf secondary selected this study. was analyzed using Illumina MiSeq sequencing 16S rRNA genes. Nonmetric multidimensional scaling used illustrate clustering different samples based on Bray–Curtis distances. structure Mantel test. interactions among taxa visualized with network, processes quantified Beta Nearest Taxon Index (Beta-NTI). dominant phyla across all soils Proteobacteria (45.17%), Acidobacteria (21.73%), Actinobacteria (8.75%), Chloroflexi (5.06%). Chao1 estimator richness, observed ASVs, faith-phylogenetic diversity (faith-PD) index, composition distinguishing features examined four types. first two principal components redundancy analysis explained 41.33% variation in community, total organic carbon, moisture, pH, nitrogen, carbon/nitrogen (C/N), carbon/phosphorous (C/P), nitrogen/phosphorous (N/P) being main shaping communities. more complex compared that pure forests. Beta-NTI indicated collaboratively influenced by deterministic stochastic ecological processes.

Language: Английский

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Diversity and Composition of Soil Acidobacterial Communities in Different Temperate Forest Types of Northeast China

Microorganisms, Journal Year: 2024, Volume and Issue: 12(5), P. 963 - 963

Published: May 10, 2024

To gain an in-depth understanding of the diversity and composition soil Acidobacteria in five different forest types typical temperate ecosystems to explore their relationship with nutrients. The was determined by high-throughput sequencing technology. Soil Acidobacteria’s alpha-diversity index nutrient content differed significantly among types. β-diversity also varied across Acidobacterial genera, such as Acidobacteria_Gp1, Acidobacteria_Gp4, Acidobacteria_Gp17, play key roles forests. RDA analyses pointed out that pH, available nitrogen (AN), carbon (C/N) ratio, phosphorus (AP), total (TC), (TP) were significant factors affecting In this study, under a ecosystem analyzed, revealing complex between them physicochemical properties. These findings not only enhance our microbial ecology but provide important guidance for ecological conservation restoration strategies ecosystems.

Language: Английский

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Fertilization- and Irrigation-Modified Bacterial Community Composition and Stimulated Enzyme Activity of Eucalyptus Plantations Soil

International Journal of Molecular Sciences, Journal Year: 2024, Volume and Issue: 25(3), P. 1385 - 1385

Published: Jan. 23, 2024

Irrigation and fertilization are essential management practices for increasing forest productivity. They also impact the soil ecosystem microbial population. In order to examine bacterial community composition structure in response irrigation a Eucalyptus plantations, total of 20 samples collected from plantations were analyzed using high-throughput sequencing. Experimental treatments consisting control (CK, no or fertilization), only (F), (W), (WF). The results showed positive correlation between enzyme activities (urease, cellulase, chitinase) treatments. These significantly correlated with diversity communities plantations.. Bacteria was considerably increased under (W, F, WF) when compared CK treatment. Additionally, richness (W Acidobacteria (38.92–47.9%), Proteobacteria (20.50–28.30%), Chloroflexi (13.88–15.55%) predominant phyla found soil. Specifically, treatment, relative abundance higher W, WF treatments, while lower. contents phosphorus, accessible potassium, organic carbon all positively associated Under bacteria nitrogen metabolisms, activity, nutrient an increase, indicating on production. Collectively, these findings provide scientific managerial bases improving productivity plantations.

Language: Английский

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Climax forest has a higher soil bacterial diversity but lower soil nutrient contents than degraded forests in temperate northern China

Ecology and Evolution, Journal Year: 2022, Volume and Issue: 12(11)

Published: Nov. 1, 2022

Abstract Bacteria are a crucial component of forest soil biodiversity and play an important role in numerous ecosystem processes. Here, we studied the patterns bacterial community diversity structure climax ( Larix gmelinii ; LG) compared with those degraded ecosystems four vegetation types (BD, Betula dahurica BP, platyphylla QM, Quercus mongolica LGQM, mixed coniferous–broadleaved composed ) Heilongjiang Zhongyangzhan Black‐billed Capercaillie Nature Reserve northern China, using Illumina MiSeq sequencing 16 S rRNA genes. Soil physicochemical properties (pH, organic carbon = SOC, total nitrogen TN, carbon/nitrogen C/N, phosphorous TP, available AN, AP) differed significantly p < .05) among five forests. AP were highest whereas SOC was lowest LGQM. pH BD α LG QM. The composition different from that forests .05). dominant phyla Acidobacteria, Proteobacteria, Verrucomicrobia, Bacteroidetes, Actinobacteria, Gemmatimonadetes, Firmicutes, Chloroflexi, Rokubacteria. relative abundances these were: 30.7% for Acidobacteria 42.6% Proteobacteria LG, 17.6% Verrucomicrobia BD, 5.5% Firmicutes 6.9% Actinobacteria genera across Bryobacter some poorly characterized taxa (e.g., Candidatus_Udaeobacter Candidatus_Solibacter ). Redundancy analysis indicated main shaped communities. Our study revealed distinct values forests, suggesting biotic abiotic factors associated shaping thus biogeochemical functions. results this contribute to deeper understanding better predictions network belowground systems functions services ecosystems.

Language: Английский

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The Effects of Exogenous Benzoic Acid on the Physicochemical Properties, Enzyme Activities and Microbial Community Structures of Perilla frutescens Inter-Root Soil

Microorganisms, Journal Year: 2024, Volume and Issue: 12(6), P. 1190 - 1190

Published: June 13, 2024

This study analyzed the effects of benzoic acid (BA) on physicochemical properties and microbial community structure perilla rhizosphere soil. The analysis was based high-throughput sequencing technology physiological biochemical detection. results showed that with increase in BA concentration, soil pH significantly decreased, while contents total nitrogen (TN), alkaline (AN), available phosphorus (AP), potassium (AK) increased. activities conversion enzymes urease phosphatase increased, but catalase peroxidase decreased. indicates can enzyme activity improve nutrient conversion; addition altered composition diversity bacterial fungal communities. relative abundance beneficial bacteria such as Gemmatimonas, Pseudolabrys, Bradyrhizobium decreased significantly, harmful fungi Pseudogymnoascus, Pseudoeurotium, Talaromyces increased significantly. Correlation shows AP, AN, TN are main factors affecting elucidates soil, preliminarily reveals mechanism its allelopathic effect growth perilla.

Language: Английский

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Heterogeneous Habitats in Taiga Forests with Different Important Values of Constructive Species Changes Bacterial Beta Diversity

Microorganisms, Journal Year: 2023, Volume and Issue: 11(10), P. 2609 - 2609

Published: Oct. 23, 2023

As a crucial link between the aboveground and belowground components of forest ecosystems, soil bacterial communities are extremely sensitive to changes in plant conditions. To investigate impact difference constructive species on taiga forests, we conducted vegetation survey at international monitoring plot Larix gmelinii forests Great Khingan Mountains calculated important value determine experimental groups based this survey. Subsequently, collected samples for high-throughput sequencing analyze how community composition diversity changed, which factors affected them. The results showed that with different values had heterogeneous habitats, AP content significantly increased, SOC, MBC, pH, C/N decreased (p < 0.05). A total 32 phyla, 91 classes, 200 orders, 308 families, 496 genera, 975 bacteria were obtained by sequencing. Among them, Proteobacteria, Actinobacteriota, Acidobacteriota dominant Mycobacterium was genus, relative abundance each group varied. beta significant differences = 0.001), C/N, AP, TN, AN, WC being main influencing factors. Functional prediction analysis chemoheterotrophy aerobic functional groups, Overall, changed composition, diversity, potential functions bacteria.

Language: Английский

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The Effects of Korean Pine and Manchurian Walnut Monocultures and Mixed Plantations on Soil Fungal and Bacterial Communities

Forests, Journal Year: 2023, Volume and Issue: 14(8), P. 1594 - 1594

Published: Aug. 6, 2023

(1) Background: Korean pine (Pinus koraiensis) and Manchurian walnut (Juglans mandshurica) are the main tree species for plantation regeneration in Northeast China, mixed of them is one typical measures adopted to address decline stand productivity long-term monocultures. However, little known about effects monocultures plantations on soil microbial diversity, composition, functional groups. (2) Methods: We used ITS 16S rRNA gene sequencing detect fungal bacterial communities FUNGuild, FAPROTAX, Bugbase databases predict their (3) Results: Fungal alpha diversity were always higher than The type had a greater impact composition composition. groups significantly affected by (p < 0.05), while barely changed among all types. available nutrient content was most important factor shaping community structures (4) Conclusions: Shifts compositions might play dominant role cycling across different types China.

Language: Английский

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