Comparison of impacts of invasive weed, Ambrosia artemisiifolia, and native weed, Digitaria chinensis, on soil enzyme activity and fertility Distribution patterns of alien invasive plants and their influences on native plants of Hainan Island Community characteristics of riparian alien plants influenced by different types of human disturbance: A case study of Yongding River, Beijing Bioremediation of petroleum contaminated soil by plants and arbuscular mycorrhizal fungi in Northern Shaanx A Primary Study on the Removal of Eutrophication and Restraint of Algae by Some Plants Flora analysis of riparian vegetation in Yongding-Haihe river system, China Vegetation recovery in subtropical monsoon evergreen broad-leaved forest Ⅱ Gas exchange of woody legumes New record and combinative species from Guangxi, China Effects of exotic plant Ageratina adenophora invasion on mycorrhizal fungal community