Article
Plant Sciences
Shengbo Shi, Rui Shi, Tiancai Li, Dangwei Zhou
Summary: The study found that the alpine meadow plant species Kobresia humilis on the Qinghai-Tibet Plateau have adapted to enhanced UV-B radiation by developing larger leaves and more flowers, with an earlier flowering period.
Article
Soil Science
Baogang Zhang, Shuo Jiao, Gaodi Zhu, Huai Chen, Yanjiang Cai, Scott X. Chang
Summary: Neighboring plant community attributes, especially the identity of neighboring plant species, have a significant impact on the rhizobiome communities of focal plants. The attributes of aboveground plant communities have a stronger influence on rhizobiome richness and composition than belowground attributes.
Article
Environmental Sciences
Furong Wang, Tingting Li, Ruiyang Zhang, Jinsong Wang, Meng Xu, Hongbo Guo, Shuli Niu, Dashuan Tian
Summary: This study investigates the nonlinearity of root respiration responses to the interactions of nitrogen enrichment and extreme water change. The experiment was conducted in an alpine meadow for 6 years, coinciding with extreme precipitations. Results show that root respiration exhibited divergent responses to nitrogen addition under different water conditions. Root biomass and traits were found to be critical mechanisms affecting root respiration response, with their relative importance changing with water condition.
SCIENCE OF THE TOTAL ENVIRONMENT
(2024)
Article
Ecology
Meimei Bai, Kongtao Wei, Kaikai Ma, Changlin Xu, Xiaojun Yu
Summary: Determining the optimal rest grazing period can benefit the growth and reproduction of Kobresia humilis in alpine meadows during spring. The critical period of soil thawing was found to be the best time to start rest grazing for the maintenance and enhancement of K. humilis.
ECOLOGICAL ENGINEERING
(2022)
Article
Environmental Sciences
Mengke Si, Xiaowei Guo, Yuting Lan, Bo Fan, Guangmin Cao
Summary: Soil moisture dynamics are important for ecological and hydrological processes, but long-term studies are scarce in the Qinghai-Tibet Plateau. This study analyzed 13 years of soil moisture data and environmental factors, and found that global warming would reduce soil moisture.
Article
Ecology
Yanyan Lv, Yi Sun, Shuhua Yi, Baoping Meng
Summary: Kobresia pygmaea is an important species in the alpine meadow of Qinghai-Tibet Plateau, and its degradation can lead to irreversible degradation. This study used a niche model to determine the potential distribution of Kobresia pygmaea community and identified climate and human activities as the driving factors. The results showed that climate factors and human activities significantly influenced the distribution of Kobresia pygmaea community.
FRONTIERS IN ECOLOGY AND EVOLUTION
(2023)
Article
Agronomy
Yibo Wu, Biao Zhu, David M. Eissenstat, Shiping Wang, Yanhong Tang, Xiaoyong Cui
Summary: The study showed that the effects of warming and grazing on alpine meadow root dynamics are not simply additive, but interact with each other. Warming inhibits root activities, while grazing promotes root production and mortality, with some effects on turnover rate.
Article
Environmental Sciences
Min Hou, Zhihong Zhang, Xia Wang
Summary: This paper conducted experiments to study the influence of roots on the hydrothermal behavior of alpine meadow in Nangqian district, Tibetan Plateau. The results showed that the root biomass decreased with increasing soil depth, and the hydraulic and thermal conductivities of the soil increased with the decrease in root biomass. The research provides insights into the relationship between soil hydrothermal properties and natural disasters in Tibetan Plateau, which is important under the context of global warming.
FRONTIERS IN ENVIRONMENTAL SCIENCE
(2023)
Article
Soil Science
Bin Jia, Li Jia, Xiao Ming Mou, Jie Chen, Fen-Can Li, Qiu-jin Ma, Xiao Gang Li
Summary: Shrubification increases phosphorus limitation to microorganisms, leading to decreased decomposition of soil organic carbon (SOC) and mitigated CO2 emissions in grasslands. Additionally, shrubification alters the composition of soil carbohydrate pools and microbial activity.
SOIL BIOLOGY & BIOCHEMISTRY
(2022)
Article
Agronomy
Mingjie Xu, Tao Zhang, Yangjian Zhang, Ning Chen, Juntao Zhu, Yongtao He, Tingting Zhao, Guirui Yu
Summary: The study found that soil drought had the most severe impact on alpine meadow productivity in the Tibetan Plateau, while atmospheric drought and compound drought also significantly inhibited productivity. These drought types significantly increased sensible heat flux, providing positive feedback to droughts and leading to further decreases in GPP.
AGRICULTURAL AND FOREST METEOROLOGY
(2021)
Article
Ecology
Yanwen Qi, Xinhang Sun, Sichen Peng, Xiaodan Tan, Shurong Zhou
Summary: This study investigated the response mechanism of soil nematode communities to nitrogen and phosphorus fertilizer. The results showed that nitrogen fertilizer increased the abundance and richness of bacterivorous nematodes, while phosphorus fertilizer decreased the total abundance of bacterivorous nematodes. Additionally, the diversity of the nematode community was significantly affected by soil physicochemical properties and plant root functional traits.
FRONTIERS IN ECOLOGY AND EVOLUTION
(2023)
Article
Agronomy
Fangyue Zhang, Quan Quan, Fangfang Ma, Qingping Zhou, Shuli Niu
Summary: The study demonstrated that clipping increases grassland sensitivity to precipitation changes in an alpine meadow, while also positively affecting plant growth and productivity.
Article
Environmental Sciences
Baoping Meng, Zhigui Yang, Hongyan Yu, Yu Qin, Yi Sun, Jianguo Zhang, Jianjun Chen, Zhiwei Wang, Wei Zhang, Meng Li, Yanyan Lv, Shuhua Yi
Summary: The study successfully mapped the spatial distribution of the Kobresia pygmaea (KP) community using machine learning algorithms combined with high-resolution satellite images and topographic indices, revealing significant spatial heterogeneity in alpine meadow vegetation communities. The random forest method performed best in three counties, with good overall accuracy and Kappa coefficient.
Article
Plant Sciences
Yong Zhang, Qiuzhu Zheng, Xiaoxia Gao, Yandan Ma, Kemin Liang, Haitao Yue, Xiaoxia Huang, Kaiting Wu, Xiaorong Wang
Summary: The allocation pattern of plant biomass can reflect the strategy of the plant community in response to environmental changes. This study found that the shoot-to-root ratio (R/S) of the plant community in degraded alpine grassland ecosystems did not change with increasing degradation. Plant aboveground traits and root competition had effects on the R/S ratio, but their roles differed.
FRONTIERS IN PLANT SCIENCE
(2022)
Article
Environmental Sciences
Ying Li, Baolin Li, Yecheng Yuan, Yan Liu, Rui Li, Wei Liu
Summary: This study applied an improved soil surface nitrogen balance (SSNB) model to investigate the nitrogen flow and balance in alpine meadows of the Three Rivers Headwater Region (TRHR) from 2012 to 2019. The results showed that the grassland system had a higher nitrogen surplus than the cropland system, indicating a risk of soil mining and degradation. The improved SSNB model can be used in natural grasslands with high root biomass and resorption characteristics.
ENVIRONMENTAL POLLUTION
(2023)