The large areas which contain exceptional concentrations of species endemism and are experiencing very high rates of habitat loss are called ecological hot spots. These are also known as biodiversity hotspots. 2.3% of the Earth's land surface is represented by them. Currently, 36 biodiversity hot spots exist in the world. An area must meet two strict criteria for becoming an ecological hotspot: Contain at least 1,500 species of vascular plants found nowhere else on Earth (known as "endemic" species), Have lost at least 70 percent of its primary native vegetation. As so many species occur in such areas, interspecific competition is significant.
So, the correct answer is 'Less interspecific competition'.