干旱区生态环境知识资源中心(Arid): The responses of three dominant species to increased rainfall under different grazing systems in a desert steppe

Arid

DOI	10.1002/hyp.14632
	The responses of three dominant species to increased rainfall under different grazing systems in a desert steppe
	Song, Yifand; Liu, Tiejun; Wang, Jing; Lu, Yajing; Guo, Jianying; Dong, Zhi; Wen, Yunhao; Pei, Zhiyong
通讯作者	Liu, TJ
来源期刊	HYDROLOGICAL PROCESSES
ISSN	0885-6087
EISSN	1099-1085
出版年	2022
卷号	36 期号:6
英文摘要	Compared with drought stress, our knowledge about the potential precipitation increase in desert steppes and its ecological effects is still limited. In order to improve our understanding of the responses of desert steppe plants to climate change and human activities, we performed a 3-year-long controlled water addition experiment in grasslands with different grazing systems. The results showed that increased water changed the plant height/above-ground biomass/leaf-tissue thickness of Stipa breviflora Griseb., Cleistogenes squarrosa (Trin.) Keng and Convolvulus ammannii Desr. by +23.86%/+77.35%/-19.09%, +14.67%/+162.34%/-16.62% and + 29.14%/+69.37%/-22.85%, respectively, compared to those in the control group. The net photosynthetic rate, stomatal conductance, transpiration rate and water-use efficiencies of these three types of plants increased by 0.32%-43.71% with water addition, compared to the corresponding parameters in the control group. We also found that plant responses to increased rainfall were not always positive. Under the unique environmental conditions of desert steppes, increase in rainfall has a limited restorative effect on vegetation and an excessive increase in rainfall may actually inhibit plant growth and exacerbate grazing grassland degradation. Compared to rotational grazing and continuous grazing grasslands, plants in enclosed grasslands had higher restoration thresholds and better restorative effect following increased rainfall. Enclosure increased the adaptability and resilience of grazing grassland plants towards increased rainfall. Under the background of increased rainfall, while we look forward to the ecological restoration in desert steppe, we also need to be alert to the potential adverse effects of excessive rainfall on grazing grasslands.
英文关键词	desert steppe dominant species ecological restoration grazing systems increased rainfall response mechanism
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000817995100003
WOS关键词	PRECIPITATION GRADIENT ; SEMIARID GRASSLAND ; INNER-MONGOLIA ; BACTERIAL COMMUNITIES ; MICROBIAL COMMUNITY ; FUNCTIONAL TRAITS ; SOIL RESPIRATION ; NORTHWEST CHINA ; LEAF TRAITS ; ARID REGION
WOS类目	Water Resources
WOS研究方向	Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/393051
推荐引用方式 GB/T 7714	Song, Yifand,Liu, Tiejun,Wang, Jing,et al. The responses of three dominant species to increased rainfall under different grazing systems in a desert steppe[J],2022,36(6).
APA	Song, Yifand.,Liu, Tiejun.,Wang, Jing.,Lu, Yajing.,Guo, Jianying.,...&Pei, Zhiyong.(2022).The responses of three dominant species to increased rainfall under different grazing systems in a desert steppe.HYDROLOGICAL PROCESSES,36(6).
MLA	Song, Yifand,et al."The responses of three dominant species to increased rainfall under different grazing systems in a desert steppe".HYDROLOGICAL PROCESSES 36.6(2022).