Abstract: Bromus tectorum L. distributes widely around the world, and is a severely invasive species in North America, giving great influence on the local plant community structure and ecosystem function. This paper reviewed the research progress in the invasion mechanisms of B. tectorum from the aspects of habitat, spreading route, biological characteristics of B. tectorum, interactions among B. tectorum and its new neighbors, and effects of changing ecological factors in new habitats on B. tectorum. According to the recent studies, there are multiple factors affecting the invasion of B. tectorum. To clarify the invasion mechanisms would be essential in developing ecological theories and in controlling the massive invasion of B. tectorum.

Key words: urban green infrastructure (UGI), Nanjing City., morphological spatial pattern analysis (MSPA), landscape connectivity