The effects of topography on aboveground biomass and soil moisture at local scale in dryland grassland ecosystem, China

CORC > 生态环境研究中心 > 中国科学院生态环境研究中心 > 环境化学与生态毒理学国家重点实验室

	The effects of topography on aboveground biomass and soil moisture at local scale in dryland grassland ecosystem, China
	Wei, Pei ; Pan, Xuebiao ; Xu, Lin ; Hu, Qi ; Zhang, Xuting ; Guo, Yanyun 4; Shao, Changxiu ; Wang, Chenchen 1,5; Li, Qiuyue 2; Yin, Ziwei
刊名	ECOLOGICAL INDICATORS
	2019-10-01
卷号	105 页码:107-115
关键词	Quadrats investigation Landscape position Precipitation Soil water content Aboveground biomass Species distribution
ISSN号	1470-160X
英文摘要	Water is the primary limiting factor for grassland vegetation in dryland regions. Topography is considered to play an important role in the distribution of soil moisture, which will significantly affect grassland ecosystems. To examine the response of soil water content (SWC) and aboveground biomass (AGB) of grassland vegetation to precipitation patterns and topography, a 6-year investigation was conducted during the period from 2012 to 2017 in a semiarid steppe of Inner Mongolia, China. The study area was divided into three parts based on the landscape position, i.e., top area (TA), slope area (SA) and bottom area (BA). The results suggested that SWC and AGB would be significantly affected by topography and precipitation patterns. A significant negative relationship was found between the SWC and the altitude of the sampling sites. In the dryer years (2013-2017), the AGB of the BA was significantly higher than that of the SA and TA. However, a non-significant difference was found for the AGB values between the three landscape positions in the wetter year (2012). During the growing season, variation of AGB and SWC was similar in 2014 but differed in 2015. AGB exhibited a significant positive relationship with SWC above a minimum value. Precipitation significantly affected the AGB of grassland, and moderate rainfall events were more effective than light rainfall events for grassland vegetation. Moreover, the distribution of species varied in different areas, which may result in the differences in the responses of AGB to soil moisture and precipitation. This study clarifies the effects of micro-topography on soil moisture and grassland ecosystems at a local scale in dryland regions, which provides useful information for grassland ecosystem management.
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/42604]
专题	生态环境研究中心_环境化学与生态毒理学国家重点实验室
作者单位	1.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, State Key Lab Urban & Reg Ecol, Beijing 100085, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Beijing Climate Ctr, Beijing 100081, Peoples R China 4.China Agr Univ, Coll Resources & Environm Sci, Beijing 100193, Peoples R China 5.Xinjiang Agr Meteorol Stn, Urumqi 830002, Xinjiang, Peoples R China
推荐引用方式 GB/T 7714	Wei, Pei,Pan, Xuebiao,Xu, Lin,et al. The effects of topography on aboveground biomass and soil moisture at local scale in dryland grassland ecosystem, China[J]. ECOLOGICAL INDICATORS,2019,105:107-115.
APA	Wei, Pei.,Pan, Xuebiao.,Xu, Lin.,Hu, Qi.,Zhang, Xuting.,...&Yin, Ziwei.(2019).The effects of topography on aboveground biomass and soil moisture at local scale in dryland grassland ecosystem, China.ECOLOGICAL INDICATORS,105,107-115.
MLA	Wei, Pei,et al."The effects of topography on aboveground biomass and soil moisture at local scale in dryland grassland ecosystem, China".ECOLOGICAL INDICATORS 105(2019):107-115.