Degradation of alpine meadows exacerbated plant community succession and soil nutrient loss on the Qinghai-Xizang Plateau, China

Journal of Arid Land, Journal Year: 2025, Volume and Issue: 17(3), P. 368 - 380

Published: March 1, 2025

Language: Английский

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Dual Controls of Shrub Encroachment in Semiarid Grasslands: Ectomycorrhizal Fungi and Soil Nitrogen Cycling

Land Degradation and Development, Journal Year: 2025, Volume and Issue: unknown

Published: March 19, 2025

ABSTRACT Shrub encroachment significantly impacts biodiversity and ecosystem functions in grassland ecosystems. Soil microbial communities may play a key role this process. Previous studies have focused on plant competition soil abiotic factors, but the specific biological mechanisms by which microbiota drive shrub remained poorly understood. Through integrated vegetation surveys high‐throughput sequencing of across gradients Inner Mongolia, we assessed composition functional genes importance value. We found that value closely correlated with limited resources, including water nitrogen (N), during encroachment. Ectomycorrhizal (EcM) fungi were recruited semishrub Artemisia ordosica , increasing its competitiveness under conditions resource scarcity. Changes community affected N cycling reducing abundance involved fixation, nitrification, nitrate assimilation. Concurrently, shrubs preferred (NO 3 − ‐N) over herbaceous plants nutrient‐poor environments. The was facilitated EcM fungi, enabling them to thrive N‐deficient arid environments preferentially utilize NO ‐N. Our findings establish novel microbial‐mediated pathway driving encroachment, fungal symbionts enable host alleviate limitations through modified nutrient acquisition strategies. These results suggest targeted manipulation associations could inform restoration strategies shrub‐encroached grasslands highlight need for management approach accounts dynamics.

Language: Английский

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Changes in plant functional trait composition modulate nitrogen effects on above-ground biomass in a temperate desert steppe

Plant and Soil, Journal Year: 2025, Volume and Issue: unknown

Published: March 20, 2025

Language: Английский

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Vegetation drives soil microbial metabolic limitation through modifications of soil properties and microbial biomass during desert grassland-shrubland state anthropogenic transition

Applied Soil Ecology, Journal Year: 2024, Volume and Issue: 202, P. 105609 - 105609

Published: Aug. 29, 2024

Language: Английский

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