Effects of multi-heavy metal composite pollution on microorganisms around a lead-zinc mine in typical karst areas, southwest China

Ecotoxicology and Environmental Safety, Journal Year: 2023, Volume and Issue: 262, P. 115190 - 115190

Published: June 28, 2023

Heavy metal pollution poses a serious hazard to the soil bacterial community. The purpose of this study is understand characteristics heavy in lead-zinc mines karst areas and response Pb, Zn, Cd, As-induced composite microorganisms. This paper selected samples from mining area Xiangrong Mining Co., Ltd., Puding County, Guizhou Province, China. contaminated by multiple metals such as Cd As. average levels As Pb-Zn were 14.5, 7.8, 5.5 4.4 times higher than background area, respectively. Bacterial community structures functions analyzed using 16 S rRNA high-throughput sequencing technology PICRUSt method. A total 19 phyla, 34 classes 76 orders detected tested soil. At phylum level, Proteobacteria are dominant flora tailings reservoir mine, respectively GWK1 (49.64%), GWK2 (81.89%), GWK3 (95.16%); for surrounding farmland soil, Proteobacteria, Actinobacteriota, Acidobacteriota, Chloroflexi Firmicutes most abundant five groups. RDA analyses revealed that has significant impact on diversity distance increased, comprehensive potential risk value decreased, increased. Additionally, various types have different effects communities, content will also change structure. positively related therefore, highly resistant metals. analysis suggested significantly affect metabolic function Microorganisms might generate resistance enable themselves survive increasing transport ions excreting ions. These results can be used basis microbial remediation metal-contaminated areas.

Language: Английский

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Vegetation restoration enhancing soil carbon sequestration in karst rocky desertification ecosystems: A meta-analysis

Journal of Environmental Management, Journal Year: 2024, Volume and Issue: 370, P. 122530 - 122530

Published: Sept. 17, 2024

Language: Английский

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Deciphering the effect of phytohormones on the phyllosphere microbiota of Eucommia ulmoides

Microbiological Research, Journal Year: 2023, Volume and Issue: 278, P. 127513 - 127513

Published: Oct. 11, 2023

Language: Английский

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Soil nutrients, enzyme activities, and bacterial communities in varied plant communities in karst rocky desertification regions in Wushan County, Southwest China

Frontiers in Microbiology, Journal Year: 2023, Volume and Issue: 14

Published: June 14, 2023

Vegetation restoration has become a common practice in karst rocky desertification (KRD) areas of southwestern China. The bacteria, which have made connection between soil and plants, been an important role regulating the succession vegetation. However, it is still unclear how bacterial communities properties respond to natural vegetation processes areas. To address this gap, we investigated nutrients, enzyme activity, community among various plant communities, including farmland (FL), land with herbs only (SSI), herb-and-shrub (SSII), woody thickets (SSIII), coniferous forest (SSIV), broad-leaved mixed (SSV), evergreen (SSVI). Our results found that SSII had highest levels organic matter, total nitrogen, available phosphorus, sucrase, β-glucosidase all communities. These indicated contributed rapid KRD regions. FL exhibited lowest nutrients activities, while showing richness diversity This suggested appropriate human intervention can increase area. predominant phylum also varied different Actinobacteria being most abundant SSI, SSII, SSIII, SSIV, Proteobacteria were SSV SSVI. Furthermore, PCoA analysis demonstrated significant changes structure, SSIV shared similar structures, SSVI comparable structures. As for characteristics, phosphorus (TP) potassium (TK) primary factors affecting community. complex networks more stable than other groups. genera Ktedonobacter, norank_f_Anaerolineaceae, Vicinamibacter betweenness centrality scores identified as keystone co-occurrence network In summary, our promote nutrient

Language: Английский

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Research Progress of Grassland Ecosystem Structure and Stability and Inspiration for Improving Its Service Capacity in the Karst Desertification Control

Plants, Journal Year: 2023, Volume and Issue: 12(4), P. 770 - 770

Published: Feb. 8, 2023

The structure and stability of grassland ecosystems have a significant impact on biodiversity, material cycling productivity for ecosystem services. However, the issue has not been systematically reviewed. Based Web Science (WOS) China National Knowledge Infrastructure (CNKI) databases, we used systematic-review method screened 133 papers to describe analyze frontiers research into ecosystems. results showed that: (1) number articles about is gradually increasing, themes are becoming increasingly diverse. (2) There high degree consistency between study area spatial distribution grassland. (3) changes in patterns their interrelationships with processes, reviewed progress landmark structure, stability, structure–stability relationship influencing factors ecosystems; among them, main focus (51.12%), followed by (37.57%). (4) Key scientific questions structural optimization, enhancement harmonizing explored. (5) background karst desertification control (KDC) its geographical characteristics, three insights proposed optimize allocation, enhance rocky coordinate regulation mechanism stability. This provided some references managers relevant policy makers It also important service capacity KDC.

Language: Английский

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Short-Term Vegetation Restoration Enhances the Complexity of Soil Fungal Network and Decreased the Complexity of Bacterial Network

Journal of Fungi, Journal Year: 2022, Volume and Issue: 8(11), P. 1122 - 1122

Published: Oct. 25, 2022

Different vegetation restoration methods may affect the soil’s physicochemical properties and microbial communities. However, it is not known how network’s complexity of bacterial fungal communities respond to short-term restoration. We conducted a ecological experiment reveal response community stability initial during degraded grassland ecosystem. The two (sowing alfalfa (Medicago sativa, AF) smooth brome (Bromus inermis, SB)) had no significant effect on alpha diversity community, but SB significantly increased soil surface (p < 0.01). results NMDS showed that were altered by restoration, they available phosphorus (AP), potassium (AK), nitrate nitrogen (nitrate-N) closely related changes in Moreover, fungi networks, opposite was case with bacteria. Our findings confirm sowing be favorable amelioration short-term. Such have important implications for processes recovery.

Language: Английский

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Ecological Stoichiometric Characteristics of Plant–Soil–Microorganism of Grassland Ecosystems under Different Restoration Modes in the Karst Desertification Area

Agronomy, Journal Year: 2023, Volume and Issue: 13(8), P. 2016 - 2016

Published: July 29, 2023

C, N and P are the key biogenic elements of terrestrial ecosystems, their biogeochemical processes regulate nutrient cycling play a role in restoring degraded ecosystems. In this paper, grassland ecosystem under artificial restoration measures (Dactylis glomerata (DG), Lolium perenne (LP), + Trifolium repens (LT)), natural (NG) typical karst plateau desertification control area southwest China, were taken as research object. The N, concentrations ecological stoichiometry plant–soil–microorganism system grasslands different explored. We established following findings: (1) Compared with NG, plants soil DG, LP LT higher, was highest. (2) microbial biomass carbon (MBC), nitrogen (MBN) phosphorus (MBP) also (3) C:N ratio plant indicated that mineralization release rate stronger than growth NG most seriously limited by nitrogen. N:P four treatments. (4) result correlation analysis showed process coupled, closely affected each other. general, effect on relatively better for increasing plant, concentrations, especially mixed-seed leguminous gramineous forage. However, future, management, appropriate fertilizer or N-fixing should be considered to improve limitation P, so realize sustainable development ecosystems area.

Language: Английский

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Effects of rocky desertification on soil bacterial community in alpine grasslands of the Qinghai-Tibet Plateau

Frontiers in Microbiology, Journal Year: 2025, Volume and Issue: 15

Published: Jan. 6, 2025

The makeup of soil microbial communities may serve as a crucial predictor the alpine grassland ecosystem. Climate change and human disturbance have resulted in intensified ecosystem degradation, such rocky desertification, which modify structures composition microorganisms. However, little is known about effects desertification on soil. Here, we investigated five different layers Qinghai-Tibet Plateau, including nil rock (NRD); potential (PRD); light (LRD); moderate (MRD); severe (SRD), compared bacterial community with physiochemical properties conditions. result showed that significantly altered but did not affect abundance diversity. At same time increased, organic carbon (SOC), total nitrogen (TN), alkali hydrolyzable (AN), available phosphorus (AP), potassium (AK) decreased significantly, while pH, (TP); (TK) increased. Redundancy analysis revealed AK, TP, SOC are key factors influencing communities. Our finding provides basic information scientific reference for restoration grasslands.

Language: Английский

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Analyzing Characteristics of Grassland Gross Ecosystem Product to Inform Decision Making in the Karst Desertification Control

Agronomy, Journal Year: 2023, Volume and Issue: 13(7), P. 1861 - 1861

Published: July 14, 2023

Synergistically enhancing and realizing the value of grassland ecosystem services (ES) for economic activity is an important but challenging task achieving sustainability in karst desertification control (KDC). However, how to use ES characteristics KDC make decisions on improvement, human well-being enhancement, sustainable development remains unclear. In this paper, we took contiguous region Yunnan-Guangxi-Guizhou, China, a global hotspot, as study area. Based valuation gross product (GEP) county intensity, analyzed structural spatial GEP using analysis methods. We found that: (1) mainly distributed counties with low intensity (86.05% total number counties) vulnerable losses caused by livelihood farmers; (2) spatially small scattered (the geographic concentration lies between 0.015 0.237), which makes it difficult form industrial scale advantages; (3) public index (66.22–96.77%) industry (97.87–99.86%) are high, most transform private market. our findings, proposed three corresponding recommendations decision-making. The results can provide reference decision-making regarding management areas similar conditions beyond.

Language: Английский

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The Diverse Mycorrizal Morphology of Rhododendron dauricum, the Fungal Communities Structure and Dynamics from the Mycorrhizosphere

Journal of Fungi, Journal Year: 2024, Volume and Issue: 10(1), P. 65 - 65

Published: Jan. 14, 2024

It is generally believed that mycorrhiza a microecosystem composed of mycorrhizal fungi, host plants and other microscopic organisms. The Rhododendron dauricum more complex the diverse morphology our investigated results displays both typical ericoid characteristics ectomycorrhizal traits. ectendoomycorrhiza, where mycelial invade from outside into root cells, have also been observed. In order to further clarify fungi members fungal communities R. mycorrhiza, explore effects vegetation soil biological factors on their community structure, we selected two woodlands in northeast China as samples—one mixed forest Quercus mongolica, dauricum, Q. Pinus densiflor. sampling time was during local growing season, June September. High-throughput sequencing yielded total 3020 amplicon sequence variants (ASVs), which were based internal transcribed spacer ribosomal RNA (ITS rRNA) via Illumina NovaSeq platform. different habitats there are differences diversity obtained niches, specifically structure forests, found, exhibits greater stability, with relatively minor changes over time. Soil identified primary source within niche, abundance niches significantly influenced by pH, organic matter, available nitrogen. relationship between simultaneously found be intricate, while genus Hydnellum emerges central among niches. However, currently substantial gap foundational research this genus, including fact have, compared present soil, proven sensitive moisture.

Language: Английский

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