The species that come to appear in bare area are called

The species that come to appear in bare areas are called pioneer species. The pioneer species in xerarch succession are lichens and the pioneer species in hydrarch succession are phytoplankton. 
(2) Invasive species refer to non-native plants, animals, fungi or microorganisms that establish and spread aggressively in a new environment, causing harm to the native species and ecosystems in the invaded region. These species are also called alien species.  
(3) Competitive species are organisms that interact with one another in a shared environment, competing for limited resources, such as food, water, space and mates.  
(4) Species of seral community refers to a temporary or intermediate stage in the process of ecological succession, where one community of organisms replaces another over time in each habitat or ecosystem.