干旱区生态环境知识资源中心(Arid): Decreased precipitation frequency altered abundance, but not community structure, of soil nematodes in degraded grasslands

Arid

DOI	10.1016/j.ecolind.2021.108184
	Decreased precipitation frequency altered abundance, but not community structure, of soil nematodes in degraded grasslands
	Chen, Junda; Yao, Yuan; Wang, Gui; Zhong, Xiaoyue; Yang, Tianxue; Sun, Wei
通讯作者	Yang, TX ; Sun, W (corresponding author), Northeast Normal Univ, Jilin Songnen Grassland Ecosyst Natl Observat & R, Minist Educ, Inst Grassland Sci,Key Lab Vegetat Ecol, Changchun 130024, Peoples R China.
来源期刊	ECOLOGICAL INDICATORS
ISSN	1470-160X
EISSN	1872-7034
出版年	2021
卷号	131
英文摘要	Rainfall patterns in arid and semi-arid regions are characterized by a reduction in rainfall frequency. However, under this novel climatic condition, potential changes in soil nematode community among different degraded grasslands remain unclear. We conducted a mesocosm experiment to test the effects of lower precipitation frequency (decreased by 50% from the long-term mean) on nematodes in the lightly degraded (LDG), moderately degraded (oG) and severely degraded grasslands (SDG). The decreased precipitation frequency treatment significantly reduced the total abundance of nematodes by reducing soil moisture and enhancing moisture variability. Compared with other trophic groups of nematode, bacterivores were more sensitive to the altered precipitation and were significantly suppressed by higher soil moisture variation caused by lower precipitation frequency in the degraded grasslands. The decreased precipitation frequency treatment promoted plant belowground biomass through increasing soil moisture variation, which promoted plant parasites in LDG. However, in oG and SDG, plant parasites were mainly suppressed by higher soil moisture variation under the altered precipitation frequency treatment, and were less impacted by the aforementioned stimulation in plant belowground biomass. The nematode community structure was not affected by the altered precipitation frequency treatment. This study provides experimental data for predicting responses of ecosystem functions to the projected changes in precipitation regimes. These findings are critical for making feasible decisions for the sustainable management of degraded grasslands.
英文关键词	Precipitation frequency Degraded grassland Soil nematode Soil moisture Belowground biomass
类型	Article
语种	英语
开放获取类型	gold
收录类别	SCI-E
WOS记录号	WOS:000704539100007
WOS关键词	INNER MONGOLIAN STEPPE ; CLIMATE VARIABILITY ; BIOMASS ALLOCATION ; BACTERIAL-GROWTH ; FAUNAL RESPONSE ; ORGANIC-CARBON ; PLANT BIOMASS ; NITROGEN ; DROUGHT ; WATER
WOS类目	Biodiversity Conservation ; Environmental Sciences
WOS研究方向	Biodiversity & Conservation ; Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/363006
作者单位	[Chen, Junda; Yao, Yuan; Wang, Gui; Zhong, Xiaoyue; Yang, Tianxue; Sun, Wei] Northeast Normal Univ, Jilin Songnen Grassland Ecosyst Natl Observat & R, Minist Educ, Inst Grassland Sci,Key Lab Vegetat Ecol, Changchun 130024, Peoples R China; [Wang, Gui] Changchun Normal Univ, Sch Life Sci, Changchun 130032, Jilin, Peoples R China
推荐引用方式 GB/T 7714	Chen, Junda,Yao, Yuan,Wang, Gui,et al. Decreased precipitation frequency altered abundance, but not community structure, of soil nematodes in degraded grasslands[J],2021,131.
APA	Chen, Junda,Yao, Yuan,Wang, Gui,Zhong, Xiaoyue,Yang, Tianxue,&Sun, Wei.(2021).Decreased precipitation frequency altered abundance, but not community structure, of soil nematodes in degraded grasslands.ECOLOGICAL INDICATORS,131.
MLA	Chen, Junda,et al."Decreased precipitation frequency altered abundance, but not community structure, of soil nematodes in degraded grasslands".ECOLOGICAL INDICATORS 131(2021).