期刊
BIOLOGICAL INVASIONS
卷 13, 期 5, 页码 1115-1133出版社
SPRINGER
DOI: 10.1007/s10530-011-9954-5
关键词
Soil microorganisms; Nitrification; Denitrification; Ammonium oxidizing bacteria; Nitrate oxidizing bacteria; Niche construction; Community structure
资金
- FEDER (Fonds Europeens de Developpement Regional), Agence de l'eau Loire-Bretagne, Region Rhone-Alpes and Conseil General de la Loire)
- Fonds National de la Recherche Scientifique of Belgium [2.4506.06]
Big Asian knotweeds (Fallopia spp.) are among the most invasive plant species in north-western Europe. We suggest that their success is partially explained by biological and chemical niche construction. In this paper, we explored the microbial mechanisms by which the plant modifies the nitrogen cycle. We found that Fallopia spp. decreased potential denitrification enzyme activity (DEA) by reducing soil moisture and reducing denitrifying bacteria density in the soil. The plant also reduced potential ammonia and nitrite oxydizing bacteria enzyme activities (respectively, AOEA and NOEA) in sites with high AOEA and NOEA in uninvaded situation. Modification of AOEA and NOEA were not correlated to modifications of the density of implicated bacteria. AOB and Nitrobacter-like NOB community genetic structures were significantly different in respectively two and three of the four tested sites while the genetic structure of denitrifying bacteria was not affected by invasion in none of the tested sites. Modification of nitrification and denitrification functioning in invaded soils could lead to reduced nitrogen loss from the ecosystem through nitrate leaching or volatilization of nitrous oxides and dinitrogen and could be considered as a niche construction mechanism of Fallopia.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据