干旱区生态环境知识资源中心(Arid): Divergent water sources of three dominant plant species following precipitation events in enclosed and mowing grassland steppes

Arid

DOI	10.7717/peerj.7737
	Divergent water sources of three dominant plant species following precipitation events in enclosed and mowing grassland steppes
	Bao, Tiejun 1,2,3; Zheng, Yunnuan 1,2,3; Zhang, Ze 1,2,3; Sun, Heyang 1,2,3; Chao, Ran 1,2,3; Zhao, Liqing 1,2,3; Qing, Hua 1,2,3; Yang, Jie 1,2,3; Lii, Frank Yonghong 1,2,3
通讯作者	Yang, Jie
来源期刊	PEERJ
ISSN	2167-8359
出版年	2019
卷号	7
英文摘要	Understanding of the dynamic patterns of plant water use in a changing environment is one of foci in plant ecology, and can provide basis for the development of best practice in restoration and protection of ecosystem. We studied the water use sources of three coexisting dominant plant species Leymus chinensis, Stipa grandis and Cleistogenes squarrosa growing in both enclosed and mowing grassland in a typical steppe. The oxygen stable isotope ratios (delta O-18) of soil water and stem water of these three species were determined, along with soil moisture, before and after precipitation events. The results showed that (1) mowing had no significant effect on the soil moisture and its delta O-18, whereas precipitation significantly changed the soil moisture though no significant effect detected on its delta O-18. (2) C. squarrosa took up water majorly from top soil layer due to its shaollow root system; L. chinensis took up relative more water from deep soil layer, and S. grandis took up water from the middle to deep soil layers. (3) L. chinensis and S. grandis in mowing grassland tended to take up more water from the upper soil layers following precipitation events, but showed no sensitive change in water source from soil profile following the precipitation in the enclosed grassland, indicating a more sensitive change of soil water sources for the two species in mowing than enclosed grassland. The differences in root morphology and precipitation distribution may partly explain the differences in their water uptake from different soil layers. Our results have important theoretical values for understanding the water competition among plants in fluctuating environment and under different land use in the typical steppe.
英文关键词	Steppe Dominant plants Mowing Water sources Oxygen stable isotopes
类型	Article
语种	英语
国家	Peoples R China
开放获取类型	Green Published, gold
收录类别	SCI-E
WOS记录号	WOS:000489552000003
WOS关键词	STABLE-ISOTOPES ; SOIL-MOISTURE ; DROUGHT ; DESERT ; RAINFALL ; PLATEAU ; SUMMER ; ECOSYSTEMS ; MONGOLIA ; SHRUBS
WOS类目	Multidisciplinary Sciences
WOS研究方向	Science & Technology - Other Topics
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/217920
作者单位	1.Inner Mongolia Univ, Sch Ecol & Environm, Hohhot, Peoples R China; 2.Inner Monoglia Univ, Key Lab Ecol & Resource Use Mongolian Plateau, Minist Educ, Hohhot, Peoples R China; 3.Inner Monoglia Univ, Sch Ecol & Environm, Inner Mongolia Key Lab Grassland Ecol, Hohhot, Peoples R China
推荐引用方式 GB/T 7714	Bao, Tiejun,Zheng, Yunnuan,Zhang, Ze,et al. Divergent water sources of three dominant plant species following precipitation events in enclosed and mowing grassland steppes[J],2019,7.
APA	Bao, Tiejun.,Zheng, Yunnuan.,Zhang, Ze.,Sun, Heyang.,Chao, Ran.,...&Lii, Frank Yonghong.(2019).Divergent water sources of three dominant plant species following precipitation events in enclosed and mowing grassland steppes.PEERJ,7.
MLA	Bao, Tiejun,et al."Divergent water sources of three dominant plant species following precipitation events in enclosed and mowing grassland steppes".PEERJ 7(2019).