Mikania micrantha invasion enhances the carbon (C) transfer from plant to soil and mediates the soil C utilization through altering microbial community
文献类型： 外文期刊
作者： Ni, Guangyan 1 ; Zhao, Ping 1 ; Huang, Qiaoqiao 3 ; Zhu, Liwei 1 ; Hou, Yuping 4 ; Yu, Yina 5 ; Ye, Youhua 6 ; Ouyang, Le 1 ;
作者机构： 1.Chinese Acad Sci, Key Lab Vegetat Restorat & Management Degraded Ec, South China Bot Garden, Guangzhou 510650, Peoples R China
2.Chinese Acad Sci, Guangdong Prov Key Lab Appl Bot, South China Bot Garden, Guangzhou 510650, Peoples R China
3.Chinese Acad Trop Agr Sci, Environm & Plant Protect Inst, Haikou 571101, Hainan, Peoples R China
4.Ludong Univ, Coll Life Sci, Yantai 264025, Peoples R China
5.South China Agr Univ, Coll Forestry & Landscape Architecture, Guangzhou 510642, Peoples R China
6.Zhongkai Univ Agr & Engn, Dept Hort & Landscape Architecture, Guangzhou 510225, Peoples R China
关键词： Carbon utilization; C-13-phospholipid fatty acid analysis; Mikania micrantha; Plant invasion; Soil microbial community
期刊名称：SCIENCE OF THE TOTAL ENVIRONMENT （ 影响因子：7.963； 五年影响因子：7.842 ）
ISSN： 0048-9697
年卷期： 2020 年 711 卷
页码：
收录情况： SCI
摘要： Exotic plant invasion alters the structure and coverage of terrestrial vegetation and affects the carbon (C) stocks in ecosystems. Previous studies have shown the increases in the C stocks with increasing invasive plants, but these results remain contentious. Soil microbial communities are usually altered by plant invasion, which potentially influences the C cycling underground. We hypothesized that the plant invasion-caused dynamic changes in soil microbes would lead to the corresponding change in soil C accumulation. Using greenhouse experiments we simulated different invader intensities through varying the relative abundance of invasive species Mikania micrantha and its co-occurring native species Paederia scandens. By analyzing C-13-phospholipid fatty acid we found the invasive M. micrantha assimilated more C-13 and transferred faster the fixed C-13 through different tissues to soils, as compared to native P. scandens. Soil microbial components, i.e., i15:0, 16:0, 10Me16:0, 18:1w9c and 18:2w6,9 were mainly using the photo-assimilated C-13. In addition, we found a hump-shaped relationship between soil net C-13 accumulate rate and rhizosphere microbial biomass, indicating that the soil C accumulation may be either enhanced or reduced in invaded ecosystems, depending on microbe abundance. (C) 2019 Elsevier B.V. All rights reserved.
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