Shrub Encroachment Increases Deep Soil Carbon Stocks and Reduces Carbon Turnover Rates in Alpine Meadows on the Tibetan Plateau

Journal of Plant Nutrition and Soil Science, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 7, 2025

ABSTRACT Background Shrubs have been expanding on the alpine meadows of Tibetan Plateau (TP). Aim However, effects interactions between shrub size and soil depth organic carbon (SOC) remain unclear. Methods In this study, we selected encroached by Lonicera rupicola , Potentilla fruticosa Caragana erinacea establishing sampling sites across three sizes (small, medium, large) grass patches. We then measured SOC stocks estimated turnover rates using isotopic enrichment factor β at a 1 m. Results The results showed that all typical shrubs increased stocks, which mainly occurred in deep 20–100 cm. 0–10 cm layer tended to decrease with increasing size, whereas 10–20 exhibited no significant differences different vegetation types. Soils under also significantly higher values compared soils, particularly large patches, thus suggesting slower turnover. A positive correlation was found stock, indicating (C) sequestration capacity enhanced after expansion. Conclusion This study emphasizes importance expansion research provides new insights into assessment prediction C sink functions context global change.

Language: Английский

The Impacts of Revegetation on Ecosystem Services in the Extremely Degraded Alpine Grassland of Permafrost Regions

Sustainability, Journal Year: 2025, Volume and Issue: 17(4), P. 1512 - 1512

Published: Feb. 12, 2025

Alpine grassland degradation in permafrost regions seriously affects the provision of ecosystem services, posing a threat to ecological security. Revegetation is key strategy for restoration alpine ecosystems on Qinghai–Tibetan Plateau (QTP). However, there lack comprehensive research evaluating services after revegetation, especially regions. In this study, we assessed changes following revegetation QTP through on-site monitoring and sampling, using extremely degraded as control. addition, analyzed trade-offs among identified drivers. Our results indicate that (1) significantly increased forage supply, carbon storage, soil retention values (p < 0.05), while water stability showed no significant > 0.05); (2) vegetation effectively reduced services; (3) main drivers were coverage, precipitation, belowground biomass, duration. Overall, study demonstrates improves services. The enhancement these provides valuable data future grassland.

Language: Английский