Impacts of Four Invasive Asteraceae on Soil Physico-Chemical Properties and AM Fungi Community

• 作者: Chaohe Huangfu Dianlin Yang Hongmei Liu Hui Wang Xinwei Chen Yuxiao Liu
• 来源期刊: 美国植物学期刊(英文)
• 学科: 医学
• 关键词: INVASIVE Plants MYCORRHIZAL SYMBIOSIS SOIL NUTRIENT Cycle ENZYME Activity Plant-Soil Interactions
• 年，卷（期）: 2015,（17）
• 页码范围: 2734-2743
• 页数: 10页
• 分类号: R73

摘要

Invasive Asteraceae are an important group of plants and might have universal impacts on invaded ecosystems. However, research data on the ecological impacts of specific plants are still lacking. Chromolaena odorata, Ageratina adenophora, Flaveria bidentis, and Mikania micrantha are four typical alien Asteraceae in China. The involvement of soil biota, in particular, the community structure of arbuscular mycorrhizal (AM) fungi in their invasion process was tested in present research. It was found that invasion by the four Asteraceae changed, to different extents, the nutrient levels in soils. Invasion by C. odorata, A. adenophora, and F. bidentis followed common patterns: 1) decreasing pH value;2) increasing the soil AM fungal diversity and species richness. Invasion by all four Asteraceae tested increased nitrogen pools and accelerated nitrogen fluxes with a decrease in the phosphorus pool, especially available phosphorus. It was suggested that mycorrhizal symbiosis might partially promote successful invasion of these Asteraceae by affecting the metabolism of phosphorus in soil. The impacts on soil ecosystems of these Asteraceae tested were also species-specific, and different invasion strategies were exhibited.