Answer: air quality, soil composition, the existence of fungal symbionts in the soil, the surviving species in the habitat
Explanation:
Succession is a series of gradual changes that occur in an ecosystem concerning the time until the ecosystem attains stability.
Air quality: The air is an important abiotic factor. The air or wind pattern is responsible for wind erosion and the amount of precipitation that a region receives. Thus if the habitat is disturbed by a forest fire the wind will be indirectly responsible for the rain to re-initiate the succession.
Soil composition: The soil composition is another important abiotic factor. The fertility of the soil is important for the growth of plants. Thus if the soil composition is suitable enough to support the growth of new plants in previously disturbed habitat the succession will resume.
The existence of fungal symbionts in the soil: Some of the fungal species live in symbiotic association with the plant roots. These fungal species derive nutrients for plants from the soil and also derive prepared food from plants. Thus if the area gets disturbed that is if the entire vegetation cover is lost the fungal colony will support the growth of new plants. This way the succession will resume.
The surviving species in the habitat: Although the habitat is disturbed recently but the growth of species can resume if few surviving species are left. These surviving species will reproduce and restore the species density and diversity in the habitat.
