干旱区生态环境知识资源中心(Arid): Dominant plant species influence nematode richness by moderating understory diversity and microbial assemblages

Arid

DOI	10.1016/j.soilbio.2019.107566
	Dominant plant species influence nematode richness by moderating understory diversity and microbial assemblages
	Wang, Xiangtai 1; Xiao, Sa 1; Yang, Xiaoli 1; Liu, Ziyang 1; Zhou, Xianhui 1; Du, Guozhen 1; Zhang, Limin 1; Guo, Aifeng 1; Chen, Shuyan 1; Nielsen, Uffe N.2
通讯作者	Xiao, Sa
来源期刊	SOIL BIOLOGY & BIOCHEMISTRY
ISSN	0038-0717
出版年	2019
卷号	137
英文摘要	Belowground assemblages are tightly linked to the aboveground vegetation, and often differ between plant species and vegetation types due to direct and indirect influences. However, the relative contribution of these direct and indirect influences of plants on belowground organisms differs among taxa and remains poorly understood. We established a plant removal experiment to better understand the effects of dominant plant species on nematode assemblages in an alpine meadow on the Tibetan plateau. We quantified plant community diversity, soil microbial assemblage richness and edaphic properties to explore how a dominant shrub and graminoids affect nematode assemblage structure and community-weighted mean (CWM) biomass using structural equation modelling (SEM). We found contrasting responses of nematode richness and CWM biomass of nematodes to the removal of shrubs and graminoids, including an intriguing interaction between them. The latter indicates that interactions between shrubs and graminoids modify nematode communities rather than their independent effects. Our results further suggest that dominant plants predominantly indirectly influence nematode richness through changes in biotic variables, specifically understory diversity, and bacterial and fungal richness. However, the dominant plants had no direct and limited indirect effects on CWM nematode biomass, which instead increased with soil nitrogen content, and decreased with soil pH, carbon and ammonium content. Our results provide insight into the relative role of direct and indirect influences on belowground assemblages and highlight the importance of dominant plants In maintaining belowground diversity. By contrast, edaphic properties appear more important to belowground biomass, likely reflecting longer term influences of the plant community on resource availability and quality. vegetation changes in grassland, such as reduced dominance of shrubs and graminoids, might therefore reduce soil biodiversity relatively rapidly but contribute to longer term impacts through changes in biogeochemical cycles.
英文关键词	Community weighted mean Microbial community Nematode biomass Structural equation modelling Taxonomic richness Tibetan plateau
类型	Article
语种	英语
国家	Peoples R China ; Australia
收录类别	SCI-E
WOS记录号	WOS:000489066300009
WOS关键词	FOOD WEBS ; COMMUNITY STRUCTURE ; SOIL NEMATODES ; BIODIVERSITY ; SHRUB ; DESERTIFICATION ; GRASSLANDS ; IDENTITY ; NITROGEN ; REMOVAL
WOS类目	Soil Science
WOS研究方向	Agriculture
来源机构	兰州大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/218876
作者单位	1.Lanzhou Univ, Sch Life Sci, State Key Lab Grassland & Agroecosyst, 222 Tianshui Rd, Lanzhou 730000, Gansu, Peoples R China; 2.Western Sydney Univ, Hawkesbury Inst Environm, Locked Bag 1797, Penrith, NSW 2751, Australia
推荐引用方式 GB/T 7714	Wang, Xiangtai,Xiao, Sa,Yang, Xiaoli,et al. Dominant plant species influence nematode richness by moderating understory diversity and microbial assemblages[J]. 兰州大学,2019,137.
APA	Wang, Xiangtai.,Xiao, Sa.,Yang, Xiaoli.,Liu, Ziyang.,Zhou, Xianhui.,...&Nielsen, Uffe N..(2019).Dominant plant species influence nematode richness by moderating understory diversity and microbial assemblages.SOIL BIOLOGY & BIOCHEMISTRY,137.
MLA	Wang, Xiangtai,et al."Dominant plant species influence nematode richness by moderating understory diversity and microbial assemblages".SOIL BIOLOGY & BIOCHEMISTRY 137(2019).