AP BIOLOGY

Detailed explanation-1: -Species that arrive first in the newly created environment are called pioneer species, and through their interactions they build a simple initial biological community. This community becomes more complex as new species arrive.

Detailed explanation-2: -The first organisms appearing in the regions of primary succession are pioneer species (usually lichens or mosses). They are the first species present. They must be strong and hardy. The development of a new community is succession.

Detailed explanation-3: -Lichens, fungi, bacteria, fireweed, grasses, alder, and willow are examples of pioneer species.

Detailed explanation-4: -Secondary Succession This type of succession is faster because the soil is already in place. In this case, the pioneer species are plants such as grasses, birch trees, and fireweed. Organic matter from the pioneer species improves the soil. This lets other plants move into the area.

Detailed explanation-5: -Common examples of pioneer species include bacteria, lichen, mosses, and fungi.