(Peer-Reviewed) Interactions between invasive plants and heavy metal stresses: a review
Jian Li 李健 ¹ ², Zhanrui Leng ¹, Yueming Wu ¹, Yizhou Du ³, Zhicong Dai 戴志聪 ¹, Asim Biswas ⁴, Xiaojun Zheng 郑小军 ¹, Guanlin Li 李冠霖 ¹, Esawy kasem Mahmoud ⁵, Hui Jia 贾慧 ¹, Daolin Du 杜道林 ¹
¹ Institute of Environment and Ecology, Institute of Environmental Health and Ecological Security, School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang, China
中国 镇江 江苏大学环境与安全工程学院 环境生态研究所 环境健康与生态安全研究院
² Key Laboratory of Original Agro-Environmental Pollution Prevention and Control, Ministry of Agriculture and Rural Affairs/ Tianjin Key Laboratory of Agro-Environment and Agro-Product Safety, Agro-Environment Protection Institution, Ministry of Agriculture and Rural Affairs, Tianjin, China
中国 天津 农业农村部产地环境污染防控重点实验室 天津市农业环境与农产品安全重点实验室
³ School of Computer Science, Faculty of Engineering, University of Sydney, Darlington, Australia
⁴ School of Environmental Sciences, University of Guelph, Guelph, Ontario, Canada
⁵ Department of soil and water science, Faculty of agriculture, Tanta University, Egypt
Global changes have altered the distribution pattern of the plant communities, including invasive species. Anthropogenic contamination may reduce native plant resistance to the invasive species. Thus, the focus of the current review is on the contaminant biogeochemical behavior among native plants, invasive species and the soil within the plant-soil ecosystem to improve our understanding of the interactions between invasive plants and environmental stressors.
Our studies together with synthesis of the literature showed that a) the impacts of invasive species on environmental stress were heterogeneous, b) the size of the impact was variable, and c) the influence types were multidirectional even within the same impact type. However, invasive plants showed self-protective mechanisms when exposed to heavy metals (HMs) and provided either positive or negative influence on the bioavailability and toxicity of HMs.
On the other hand, HMs may favor plant invasion due to the widespread higher tolerance of invasive plants to HMS together with the “escape behavior” of native plants when exposed to toxic HM pollution. However, there has been no consensus on whether elemental compositions of invasive plants are different from the natives in the polluted regions. A quantitative research comparing plant, litter and soil contaminant contents between native plants and the invaders in a global context is an indispensable research focus in the future.