Fluctuations in Species Diversity in Evergreen Broad-Leaved Forests and Changes in Their Co-Occurrence Network DOI Open Access
Xiao Zheng, Yaping Hu,

Xiao‐Min Ge

et al.

Forests, Journal Year: 2025, Volume and Issue: 16(4), P. 594 - 594

Published: March 28, 2025

Understanding the population dynamics and interspecific interactions in subtropical forests is crucial for uncovering underlying mechanisms of species coexistence community stability. Two censuses were conducted between 2018 2023 a 9.6 ha evergreen broad-leaved forest plot situated Mount Wuyi, southeastern China. Utilizing co-occurrence networks long-term data, we examined relationship their contributions to assembly. Our findings reveal that high mortality rates among small-diameter individuals have created ecological niches, facilitating establishment 12 new 2023. A generalized linear mixed-effects model showed positive relationships sapling abundance conspecific neighbor density. Co-occurrence demonstrated shift toward higher but reduced modularity, indicating more integrated yet less stable structure. Despite low abundance, rare significant roles network connectivity stability, underscoring status as keystone species. Additionally, correlations topographic factors richness highlighted role environmental filtering shaping composition. contribute deeper understanding dynamics, emphasizing importance monitoring unravel complex populations conditions. This study represents first observational experiment secondary forest, providing valuable insights into assembly this region.

Language: Английский

Ectomycorrhizal fungi explain more variation in rhizosphere nutrient availability than root traits in temperate forests DOI
Yan Xiang, Lingyan Zhou, Yamin Chen

et al.

Applied Soil Ecology, Journal Year: 2025, Volume and Issue: 207, P. 105923 - 105923

Published: Feb. 5, 2025

Language: Английский

Citations

2
Structures and determinants of soil microbiomes along a steep elevation gradient in Southwest China DOI Creative Commons
Ting Li, Ziyan Gao, Ping Zhou

et al.

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

Published: Jan. 6, 2025

Soil microbial communities play a vital role in accelerating nutrient cycling and stabilizing ecosystem functions forests. However, the diversity of soil microbiome mechanisms driving their distribution patterns along elevational gradients montane areas remain largely unknown. In this study, we investigated an gradient from 650 m to 3,800 above sea level southeast Tibet, China, through DNA metabarcode sequencing both bacterial fungal communities. Our results showed that dominant phyla across elevations were Proteobacteria, Acidobacteriota Actinobacteriota, Ascomycota Basidiomycota. The Simpson indices bacteria fungi demonstrated hollow trend gradient, with abrupt decrease at 2,600 a.s.l. coniferous broad-leaved mixed forests (CBM). chemoheterotrophy was lifestyle predicted increasing elevation. terms lifestyles, saprophytic symbiotic functional but relative abundance negatively correlated Environmental factors including vegetation type (VEG), altitude (ALT), pH, total phosphorus (TP), nitrate nitrogen (NO3 --N), polyphenol oxidase (ppo) all exhibited significant influence on community structure, whereas VEG, ALT, carbon ratio (C/N) significantly associated structure. VPA indicated edaphic explained 37% variations, while C/N, VEG 49% variations. study contributes our understanding forest ecosystems mountainous regions large elevation changes, highlighting crucial environmental shaping variations specific ecosystems.

Language: Английский

Citations

0
Dual Controls of Shrub Encroachment in Semiarid Grasslands: Ectomycorrhizal Fungi and Soil Nitrogen Cycling DOI

Yanpeng Yue,

Liming Lai, Jihua Zhou

et al.

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

Citations

0
Fluctuations in Species Diversity in Evergreen Broad-Leaved Forests and Changes in Their Co-Occurrence Network DOI Open Access
Xiao Zheng, Yaping Hu,

Xiao‐Min Ge

et al.

Forests, Journal Year: 2025, Volume and Issue: 16(4), P. 594 - 594

Published: March 28, 2025

Understanding the population dynamics and interspecific interactions in subtropical forests is crucial for uncovering underlying mechanisms of species coexistence community stability. Two censuses were conducted between 2018 2023 a 9.6 ha evergreen broad-leaved forest plot situated Mount Wuyi, southeastern China. Utilizing co-occurrence networks long-term data, we examined relationship their contributions to assembly. Our findings reveal that high mortality rates among small-diameter individuals have created ecological niches, facilitating establishment 12 new 2023. A generalized linear mixed-effects model showed positive relationships sapling abundance conspecific neighbor density. Co-occurrence demonstrated shift toward higher but reduced modularity, indicating more integrated yet less stable structure. Despite low abundance, rare significant roles network connectivity stability, underscoring status as keystone species. Additionally, correlations topographic factors richness highlighted role environmental filtering shaping composition. contribute deeper understanding dynamics, emphasizing importance monitoring unravel complex populations conditions. This study represents first observational experiment secondary forest, providing valuable insights into assembly this region.

Language: Английский

Citations

0