1. KEY CONCEPT Ecological succession is a process of change in the species that make up a community.

2. Succession 1) to create a community in a previously uninhabited area (nothing was living there before) OR
is the sequence of biotic changes that regenerate (repair) a damaged community

3. There are two types of succession.
1) primary succession — the development of an ecosystem in a previously uninhabited area (nothing lived there before-IT WAS ONLY ROCK!!!!)

4. Pioneer species- the first organisms that live in a new area Ex: lichen and some mosses break down rock into soil over time 4
1- Bare rock is exposed and lichen and moss break it down to dirt 0-15 yrs
2-Seeds are blown into the area and small shrubs grow yrs
3-As soil grows thicker, small trees take root yrs
4-Different tree species take root, and replace the old trees yrs 3 2 1

5. 2) secondary succession — started after a disaster by the remaining species (soil was left intact)
There is already soil!
0-2 yrs
2-18
18-70
70-100

6. Why do you think secondary succession takes less time than primary succession? Secondary succession starts with soil instead of bare rock.