Effect of Bidens alba on Interspecific Association and the Stability of Companion Species

In conjunction with increasing levels of atmospheric CO₂, anthropogenic land-use change and pollution, plant invasion is a key driver of ongoing global change and a major threat to biodiversity. Bidens alba （formerly B. pilosa L.） is an invasive plant species mainly occurring in the subtropics and tropics; this species is recorded to have an extensive range in central and southern China. In this study, sampling was undertaken along a 5 km of coastline in south Guangdong, China, in October 2018. Quantitative methods such as interspecific association coefficient, Godron M method and niche width, community stability among species in B. alba invasive communities were investigated, to assess the extent of B. alba damage to the coastal zone of Guangdong province. As a result, a total 113 species of plants, belonging to 41 families and 95 genera plants were observed in the plots of B.alba communities. The \mathbf\chi ^2 test results show that the B.alba associated with the main species were not significant in the communities, the main dominant species had similar adaptability to the environment. Thus, the Borreria latifolia can be used for the restoration and control of B. alba invasive plant communities in coastal zones.