Slight Degradation Also Significantly Changed Plant Community Composition and Biomass Accumulation of the Alpine Meadow on Eastern Tibetan Plateau DOI
Juanjuan Huang, Shuang Li,

Youbang Hu

et al.

Published: Jan. 1, 2024

The impacts of grassland degradation on the structure and productivity plant community remain ambiguous. properties were investigated in 64 sites across 4 different stages (vegetation coverage 95% - 100% (C I), 85% 94% II), 75% 84% III) 60% 74% IV)) an alpine meadow eastern Tibet Plateau. results indicated that diversity increased by degradation, particularly C II III sites. In contrast, above- below-ground biomass all significantly decreased (p < 0.05), resulting total from 3995 g m-2 to 2212 m-2. also changed interspecific relationships plants. network analysis revealed complexity (i.e., numbers nodes edges) with forbs emerged as most important functional group. PLS-PM affected production mainly reducing soil water/nutrient contents, shifting groups enhancing R/S. Our diversity, improved importance (poor palatability), while reduced accumulation even very slight degraded (coverage: -85%) meadows Therefore, attentions should be directed toward initial grasslands.

Language: Английский

Effects of Grazing Intensity on Microbial Diversity at Different Soil Depths in Desert Steppe Soils DOI Creative Commons

Yuxin Wang,

Xin Ju, Qian Wu

et al.

Agronomy, Journal Year: 2025, Volume and Issue: 15(1), P. 124 - 124

Published: Jan. 6, 2025

This study examines the influence of grazing intensity on soil microbial communities in a desert steppe ecosystem. Soil samples were collected from three depths (0–10 cm, 10–20 and 20–30 cm) under varying intensities: control (CK), light (LG), moderate (MG), heavy (HG). Key physicochemical properties plant characteristics analyzed alongside diversity community composition, which assessed by identifying amplicon sequence variants conducting linear discriminant analysis effect size. The results showed that significantly impacted moisture, organic carbon, total nitrogen, phosphorus levels, with notable decrease cover grazing. CK LG treatments supported higher diversity, especially surface layers, while was associated shift composition toward stress-tolerant taxa like Acidobacteriota Blastocatella. Non-metric multidimensional scaling revealed differences structure between depths, effects diminishing depth. These findings highlight critical role sustainable practices maintaining health implications for long-term resilience ecosystems.

Language: Английский

Citations

1
Slight degradation significantly alters plant functional groups and biomass accumulation in alpine meadow on the eastern Tibetan Plateau DOI
Juanjuan Huang,

Youbang Hu,

Shuang Li

et al.

Agriculture Ecosystems & Environment, Journal Year: 2025, Volume and Issue: 387, P. 109640 - 109640

Published: April 7, 2025

Language: Английский

Citations

1
Urbanized lands degrade surrounding grasslands by deteriorating the interactions between plants and soil microbiome DOI Creative Commons

Mengchao Fang,

Guang Lu, Shuping Zhang

et al.

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

Published: Jan. 6, 2025

To mitigate overgrazing on grasslands, towns were constructed in some pastoral regions of China to relocate pastoralists. Nevertheless, whether and how the urbanized lands impact surrounding grassland ecosystem remains unclear. We assessed impacts plant soil interactions within grasslands order ensure an eco-sustainable pastoralist relocation. The town with 1 km radius was selected as urbanization sample a nature sample. Plants investigated (NG), areas (T-1 km), 2 (T-2 3 (T-3 km) from center town. In T-1 T-2 km, compared NG, diversity, abundance dominant species, wood saprotroph fungi, water content (SWC), total organic carbon (TOC) decreased, while pathogen pH, phosphatase (TP) increased. Conversely, no such changes observed T-3 km. results Mantel test Partial least squares path model suggest that decrease TOC SWC, along increase pH TP lead decline fungi ultimately resulting reductions diversity species. These indicate can degradation by deteriorating plant-soil interactions.

Language: Английский

Citations

0
Long-Term Impact of Extreme Weather Events on Grassland Growing Season Length on the Mongolian Plateau DOI Creative Commons
Wanyi Zhang, Qun Guo,

Genan Wu

et al.

Remote Sensing, Journal Year: 2025, Volume and Issue: 17(9), P. 1560 - 1560

Published: April 28, 2025

Quantifying extreme weather events (EWEs) and understanding their impacts on vegetation phenology is crucial for assessing ecosystem stability under climate change. This study systematically investigated the growing season length (GL) response to four types of EWEs—extreme heat, cold, wetness (surplus precipitation), drought (lack precipitation). The EWE extremity thresholds were found statistically using detrended long time series (2000–2022) ERA5 meteorological data through z-score transformation. analysis was based a grassland in Mongolian Plateau (MP) from 2000 2022. Using solar-induced chlorophyll fluorescence event coincidence analysis, we evaluated probability GL anomalies coinciding with EWEs assessed sensitivity variability. showed that 83.7% negative 87.4% positive associated one or more EWEs, (27.0%) heat (25.4%) contributing most. These findings highlight dominant role shaping phenological shifts. Negative strongly linked particularly arid cold regions where shortened season. Conversely, had greater influence warmer wetter areas, driving both lengthening shortening GL. Furthermore, background hydrothermal conditions modulated sensitivity, being susceptible stress drier vulnerable drought. emphasize importance regional variability characteristics provide new insights into how extremes impact semi-arid regions. Future research should explore human activities enhance predictions vegetation–climate interactions ecosystems MP.

Language: Английский

Citations

0
Slight Degradation Also Significantly Changed Plant Community Composition and Biomass Accumulation of the Alpine Meadow on Eastern Tibetan Plateau DOI
Juanjuan Huang, Shuang Li,

Youbang Hu

et al.

Published: Jan. 1, 2024

The impacts of grassland degradation on the structure and productivity plant community remain ambiguous. properties were investigated in 64 sites across 4 different stages (vegetation coverage 95% - 100% (C I), 85% 94% II), 75% 84% III) 60% 74% IV)) an alpine meadow eastern Tibet Plateau. results indicated that diversity increased by degradation, particularly C II III sites. In contrast, above- below-ground biomass all significantly decreased (p < 0.05), resulting total from 3995 g m-2 to 2212 m-2. also changed interspecific relationships plants. network analysis revealed complexity (i.e., numbers nodes edges) with forbs emerged as most important functional group. PLS-PM affected production mainly reducing soil water/nutrient contents, shifting groups enhancing R/S. Our diversity, improved importance (poor palatability), while reduced accumulation even very slight degraded (coverage: -85%) meadows Therefore, attentions should be directed toward initial grasslands.

Language: Английский

Citations

0