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DOI | 10.1016/j.scitotenv.2024.170607 |
Short-term robust plant overcompensatory growth was observed in a degraded alpine meadow on the southeastern Qinghai-Tibetan Plateau | |
Ma, Yandan; Zheng, Qiuzhu; Zhang, Yong; Ganjurjav, Hasbagan; Yue, Haitao; Wang, Xiaorong; Wu, Kaiting; Liang, Kemin; Zeng, Hao; Wu, Huimin | |
发表日期 | 2024 |
ISSN | 0048-9697 |
EISSN | 1879-1026 |
起始页码 | 918 |
卷号 | 918 |
英文摘要 | Plant overcompensatory growth (OCG) is an important mechanism by which plant communities adapt to environmental disturbance. However, it is not clear whether plant OCG can occur in degraded alpine meadows. Here, we conducted a mowing experiment in an alpine meadow at three degradation levels (i.e., severe degradation, SD; moderate degradation, MD; and light degradation, LD) on the southeastern Qinghai-Tibetan Plateau from 2018 to 2020 to investigate plant OCG and its relationships with soil available nutrients, plant nutrient use efficiency (i.e., nitrogen use efficiency, NUE; and phosphorus use efficiency, PUE), and precipitation. The results showed that 1) the OCG of the plant community generally occurred across all degradation levels, and the OCG strength of the plant community decreased with mowing duration. Moreover, the OCG strength of the plant community in the SD treatment was significantly greater than that in the MD and LD treatments after two years of mowing (p < 0.05). 2) In LD and MD, the soil nitrate nitrogen (NO3-) and available phosphorus (AP) concentrations exhibited a decreasing trend (p < 0.05), while the soil ammonium nitrogen (NH4+) concentration did not change from 2018 to 2020 (p > 0.05). In the SD treatment, the soil NO3- concentration tended to decrease (p < 0.05), the NH4+ concentration tended to increase (p < 0.05), and the AP concentration exhibited an inverse parabolic trend (p < 0.05) from 2018 to 2020. 3) From 2018 to 2020, plant NUE and PUE exhibited decreasing trends at all degradation levels. 4) Plant nutrient use efficiency, which is regulated by complex plant-soil interactions, strongly controlled the OCG of the plant community along each degradation gradient. Moreover, precipitation not only directly promoted the OCG of the plant community but also indirectly affected it by regulating the structure of the plant community and plant nutrient use efficiency. These results suggest that the OCG of the plant community in degraded alpine meadows may benefit not only from the strong self-regulating capacity of the plant-soil system but also from humid climatic conditions. |
英文关键词 | Alpine meadow; Compensatory growth; Nutrient use efficiency; Mowing; Qinghai-Tibetan Plateau |
语种 | 英语 |
WOS研究方向 | Environmental Sciences & Ecology |
WOS类目 | Environmental Sciences |
WOS记录号 | WOS:001184506000001 |
来源期刊 | SCIENCE OF THE TOTAL ENVIRONMENT
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文献类型 | 期刊论文 |
条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/305069 |
作者单位 | Southwest Forestry University - China; Chinese Academy of Agricultural Sciences; Institute of Environment & Sustainable Development in Agriculture, CAAS; Huazhong Agricultural University |
推荐引用方式 GB/T 7714 | Ma, Yandan,Zheng, Qiuzhu,Zhang, Yong,et al. Short-term robust plant overcompensatory growth was observed in a degraded alpine meadow on the southeastern Qinghai-Tibetan Plateau[J],2024,918. |
APA | Ma, Yandan.,Zheng, Qiuzhu.,Zhang, Yong.,Ganjurjav, Hasbagan.,Yue, Haitao.,...&Wu, Huimin.(2024).Short-term robust plant overcompensatory growth was observed in a degraded alpine meadow on the southeastern Qinghai-Tibetan Plateau.SCIENCE OF THE TOTAL ENVIRONMENT,918. |
MLA | Ma, Yandan,et al."Short-term robust plant overcompensatory growth was observed in a degraded alpine meadow on the southeastern Qinghai-Tibetan Plateau".SCIENCE OF THE TOTAL ENVIRONMENT 918(2024). |
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