From nature to urbanity: exploring phyllosphere microbiome and functional gene responses to the Anthropocene DOI Open Access
Jian Li, Daniel F. Petticord, Mingkang Jin

et al.

New Phytologist, Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 7, 2024

The Anthropocene exerts various pressures and influences on the stability function of Earth's ecosystems. However, our understanding how microbiome responds in form to these disturbances is still limited, particularly when considering phyllosphere, which represents one largest microbial reservoirs terrestrial ecosystem. In this study, we comprehensively characterized tree phyllosphere bacteria associated nutrient-cycling genes natural, rural, suburban, urban habitats China. Results revealed that bacterial community diversity, richness, stability, composition heterogeneity were greatest at most disturbed sites. Stochastic processes primarily governed assembly communities, although role deterministic (environmental selection) shaping communities gradually increased as moved from rural Our findings also suggest human disturbance with reduced influence drift increasingly layered environmental filters deterministically constrain communities. intensification activity was mirrored changes functional gene expression within microbiome, resulting enhanced abundance, compositional variation highly human-driven environments. Furthermore, found while relative proportion core taxa decreased habitats, a set shaped distributional characteristics both microbiomes all levels disturbance. sum, study offers valuable insights into anthropogenic may dynamics improves intricate relationship between stressors, plant Anthropocene.

Language: Английский

Synergistic effects of clays and cyanobacteria on the accumulation dynamics of soil organic carbon in artificial biocrusts DOI
Cui Zhang,

Xiaoran Chen,

Keqiang Zhou

et al.

Journal of Environmental Management, Journal Year: 2025, Volume and Issue: 374, P. 124110 - 124110

Published: Jan. 13, 2025

Language: Английский

Citations

0
Nutrient Availability Shapes the Resistance of Soil Bacterial Community and Functions to Disturbances in Desert Ecosystem DOI
Hui-Yuan Gao,

Song Yuan,

Mingyu Li

et al.

Environmental Microbiology, Journal Year: 2025, Volume and Issue: 27(3)

Published: March 1, 2025

ABSTRACT Climate change has exposed desert ecosystems to frequent extreme disturbances, including wet‐dry cycles and freeze–thaw events, which accelerate desertification on a global scale. The limited nutrient availability characteristic of these may constrain microbial survival growth, making them more vulnerable environmental perturbations stressors. However, how modulates the stability soil ecological communities functions in remains poorly understood. In this study, we examined addition, applied either before or after affects resistance bacterial multifunctionality drought freeze events ecosystems. Our findings revealed that rather than drought, significantly reduced diversity, with all disturbances altering community structure. Pre‐disturbance addition notably improved diversity composition played critical role maintaining This enhanced was strongly associated increased network complexity enrichment disturbance‐tolerant taxa. results highlight pivotal stabilising under climatic conditions These offer valuable insights practical strategies for protection management desertification.

Language: Английский

Citations

0
Moisture Controls on Hydrogen Oxidizing Bacteria: Implications for the Global Soil Hydrogen Sink DOI Creative Commons
Linta Reji, Matteo B. Bertagni, Fabien Paulot

et al.

bioRxiv (Cold Spring Harbor Laboratory), Journal Year: 2025, Volume and Issue: unknown

Published: April 18, 2025

ABSTRACT Assessing the impact of increasing anthropogenic H 2 emissions on Earth’s radiative balance depends understanding soil microbial sink—the largest and most uncertain term in global budget. A primary control regulating sink is moisture, with a relationship that remains poorly constrained. Here, we assess sensitivity oxidation to moisture laboratory experiments three temperate soils—silty loam, sandy loamy sand. Using genome-resolved metagenomics, link dynamics these soils specific taxa adapted withstand desiccation have differential contributions uptake along gradient. The reveal notably low threshold for oxidizer activity, at water potentials between –70 –100 MPa across all types, including an arid soil. These measurements, which represent some lowest reported point atmospheric as vital resource survival under stressful conditions. Through simulations, further show activation increases contribution semi-arid regions by 4-7pp, while decreasing continental (−7pp), even when assuming linear scaling potential organic carbon, suggested our experiments. Our results highlight importance extreme hydrological conditions, particularly roles desertification, dryland expansion, -oxidizer ecophysiology modulating long-term changes uptake.

Language: Английский

Citations

0
From grasslands to genes: exploring the major microbial drivers of antibiotic-resistance in microhabitats under persistent overgrazing DOI Creative Commons
Jian Li, Quanhui Ma, Mingkang Jin

et al.

Microbiome, Journal Year: 2024, Volume and Issue: 12(1)

Published: Nov. 22, 2024

The extensive use of antibiotics in the global livestock industry recent decades has accelerated accumulation and dissemination antibiotic-resistance genes (ARGs) within terrestrial ecosystems. This occurs due to limited absorption most antibiotics, leading their release into environment through feces urine. poses a significant threat both human health. However, response antibiotic-resistant microorganisms ARGs grasslands prolonged grazing, as well primary microbial taxa driving ARG distribution, remain poorly understood, especially various microhabitats. In this study, we characterized phyllosphere, litter, soil after grazing meadow steppe. We particularly focused on identifying major members community influencing distinction between generalists specialists. Our findings indicate that core set accounted for 90% abundance plant-soil ecosystem. While exhibited highest abundance, litter displayed higher diversity diverse distribution patterns overgrazing. Grazing increased by elevating proportion suppressing stochastic phyllosphere while it had little effect soil. Additionally, generalist increased, but specialist decreased with no soil, under grazed conditions. Ultimately, microhabitats influenced characteristics direct (i.e., other exogenous input) indirect trampling selective feeding) effects nutrient availability, composition, mobile genetic elements. community, its broad ecological niches phylogenetic made contribution characteristics. study underscores impact environmental disturbances distributional ecosystems, mediated regulation generalized species. These insights enhance our understanding control over facilitate predictions regarding dynamics risk subjected anthropogenic disturbances.

Language: Английский

Citations

2
Carbon amendments in soil microcosms induce uneven response on H2 oxidation activity and microbial community composition DOI Creative Commons

Xavier Baril,

Philippe Constant

FEMS Microbiology Ecology, Journal Year: 2023, Volume and Issue: 99(12)

Published: Nov. 13, 2023

Abstract High-affinity H2-oxidizing bacteria (HA-HOB) thriving in soil are responsible for the most important sink of atmospheric H2. Their activity increases with organic carbon content, but incidence different carbohydrate fractions on process has received little attention. Here we tested hypothesis that amendments impact HA-HOB and diversity differentially depending their recalcitrance concentration. Carbon sources (sucrose, starch, cellulose) application doses (0, 0.1, 1, 3, 5% Ceq soildw−1) were manipulated microcosms. Only 0.1% soildw−1 cellulose treatment stimulated activity. Sucrose induced significant changes, an abatement 50% at 1% soildw−1. This was accompanied a loss bacterial fungal alpha reduction high-affinity group 1 h/5 [NiFe]-hydrogenase gene (hhyL) abundance. A quantitative classification framework elaborated to assign preference traits 16S rRNA gene, ITS hhyL genotypes. The response uneven taxonomic level, making difficult trait predict. Overall, results suggest is more susceptible be by low recalcitrant carbon, while labile carbon-rich environment unfavorable niche HA-HOB, inducing catabolic repression hydrogenase.

Language: Английский

Citations

5
Prevalence of trace gas-oxidizing soil bacteria increases with radial distance from Polloquere hot spring within a high-elevation Andean cold desert DOI Creative Commons
Zachary K. Garvin, Sebastián Abades, Nicole Trefault

et al.

The ISME Journal, Journal Year: 2024, Volume and Issue: 18(1)

Published: Jan. 1, 2024

High-elevation arid regions harbor microbial communities reliant on metabolic niches and flexibility to survive under biologically stressful conditions, including nutrient limitation that necessitates the utilization of atmospheric trace gases as electron donors. Geothermal springs present "oases" activity, diversity, abundance by delivering water substrates, reduced gases. However, it is unknown whether these exhibit a gradient effects, increasing their impact gas-oxidizers in surrounding soils. We assessed proximity Polloquere, high-altitude geothermal spring an Andean salt flat, alters diversity structure nearby soil bacterial populations compared cold desert. Recovered DNA metagenomic analyses indicate represents oasis for microbes this challenging environment, supporting greater biomass with more diverse functions proximal soils declines sharply radial distance from spring. Despite sharp decrease biomass, potential rates hydrogen (H2) carbon monoxide (CO) uptake increase away Kinetic estimates suggest activity due high-affinity gas consumption, likely survival strategy energy/carbon acquisition. These results demonstrate Polloquere regulates metabolisms, culminating increased influence yields regional flat environment. This suggests holds local importance within context broader potentially model ecosystem other systems desert environments.

Language: Английский

Citations

1
The role of halophyte-induced saline fertile islands in soil microbial biogeochemical cycling across arid ecosystems DOI Creative Commons
Shuai Zhao, Marcel G. A. van der Heijden, Samiran Banerjee

et al.

Communications Biology, Journal Year: 2024, Volume and Issue: 7(1)

Published: Aug. 29, 2024

Halophyte shrubs, prevalent in arid regions globally, create saline fertile islands under their canopy. This study investigates the soil microbial communities and energy utilization strategies associated with tamarisk shrubs ecosystems. Shotgun sequencing revealed that high salinity reduces functional gene alpha-diversity relative abundance compared to bare soils. However, organic matter accumulation within fosters key halophilic archaea taxa such as Halalkalicoccus, Halogeometricum, Natronorubrum, linked processes like carbon oxidation, nitrous oxide reduction, sulfur potentially strengthening coupling of nutrient cycles. In contrast, soils harbor salt-tolerant microbes genes for autotrophic acquisition, including fixation, H

Language: Английский

Citations

1
Regulation of wheat yield by soil multifunctionality and metagenomic-based microbial degradation potentials under crop rotations DOI
Yang Liu,

Mengmeng Wen,

Rong Hu

et al.

Journal of Environmental Management, Journal Year: 2024, Volume and Issue: 370, P. 122897 - 122897

Published: Oct. 13, 2024

Language: Английский

Citations

1
Responses of soil dissolved organic carbon properties to the desertification of desert wetlands in the Mu Us Sandy Land DOI
Kun Wang, Boyuan Bi,

Kanghui Zhu

et al.

Journal of Environmental Management, Journal Year: 2024, Volume and Issue: 354, P. 120318 - 120318

Published: Feb. 21, 2024

Language: Английский

Citations

1
Variation in Root-Associated Microbial Communities among Three Different Plant Species in Natural Desert Ecosystem DOI Creative Commons
Yulin Zhang, Yi Du, Zhihao Zhang

et al.

Plants, Journal Year: 2024, Volume and Issue: 13(17), P. 2468 - 2468

Published: Sept. 3, 2024

The process and function that underlie the assembly of root-associated microbiomes may be strongly linked to survival strategy plants. However, functional changes microbial communities in different desert plants natural ecosystems are still unclear. Thus, we studied diversity root endosphere (RE), rhizosphere soil (RS), bulk (BS) among three representative (Alhagi sparsifolia, Tamarix ramosissima, Calligonum caput-medusae) Xinjiang regions {Taklimakan (CL), Gurbantünggüt (MSW), Kumtag (TLF)} China. This study found properties {electrical conductivity (EC), organic carbon (SOC), total nitrogen (TN) phosphorus (TP), available (AN) (AP)} C. caput-medusae were significantly lower than those A. sparsifolia T. while nutrients (TN TP) higher compared ramosissima. beta bacteria fungi (RE) was different. common OTU numbers compartments (RE, RS, BS) ranked as RS > BS RE. bacterial fungal Shannon Simpson indexes Additionally, (RE RS) node average degree Root collectively contributed composition 12.4%; 10.6%; BS, 16.6%) 34.3%; 1.5%; 17.7%). These findings demonstrate variations populations across plant species with distinct arid environments. More importantly, highlights how much contribute communities.

Language: Английский

Citations

0