eng Science and Education Publishing Applied Ecology and Environmental Sciences 2328-3920 2020-06-18 8 5 199 206 10.12691/aees-8-5-3 AEES2020853 article N P Sooraj 1 2 R Jaishanker jrnair@iiitmk.ac.in 2 C R Sajeev 2 V Saroj Kumar 2 D Lijimol 2 J Ammini 2 School of Environmental Studies, Cochin University of Science and Technology, Cochin-22, Kerala, 682022, India Tropical forests are more resistant to plant invasion. However, reports of the occurrence of invasive alien plants within tropical forests have surged in recent years. The invasibility of the tropical forest ecosystem is enhanced with the disturbance mediated environmental fluctuations. The upwelling of natural light on the forest floor and associated resource fluctuation due to canopy gaps facilitate the establishment of light tolerant, invasive plants. Here the authors report the effect of the canopy gap on the establishment of M micrantha in a protected forest in Kerala, India. A significant direct relationship between the abundance of M micrantha with canopy openness and light intensity reveals how the forest canopy gap in the study area acts as a gateway to plant invasion. http://pubs.sciepub.com/aees/8/5/3/aees-8-5-3.pdf biological invasion invasive plants tropical forest canopy gap light intensity Mikania micrantha