Ecosystems undergo change over time. These changes are known as succession. For example, a forest that is clear cut will develop into a forest again if enough time is allowed for natural processes to occur. In this assignment, you will distinguish between primary and secondary ecological succession.

1. Research and define the following terms:
Primary Succession
This succession is one of two types of ecological succession and biological succession of plant life. It occurs in an environment in which a new substrate, great absence of vegetation and presence of lacking soil, are deposited. A few example would be a lava flow or area that has been left after a retreating glacier. In this type of succession pioneer species like mosses, lichen, algae, and fungus start to "normalize" the habitat that has been devastated. Also some abiotic factors like wind and water help in the "normalizing" process. This forms soil or pedogenesis. From here pioneer plants are replaced with plants that are better adapted to less austere conditions. These plants are like grasses and some shrubs which are able to live in thin mineral based soil. Then hard wood trees eventually will grow.

Secondary Succession

This succession takes place on an area that was previously colonized but was destroyed. This can be due to things such as forest fires or deforestation. The soil left is typically fertile and pre-seeding. Stumps and root systems left can be used to quickly regenerate the area's population. The structure and fertility of the soil is also prepared for new life. Therefore, the area being restored will take less time than in primary succession. Secondary succession is very common. It usually replenishes an area after natural disasters and disturbances caused by humans. The cycle will normally begin with small, simple plants such as mosses. Little plants may also start to grow.

2. Model an example of primary and secondary succession.(Include a title, necessary labels and a caption)
Primary Succession
This is a picture of primary succession. It shows how a forest grows back from scratch after a natural disaster like a volcanic eruption or glacier retreat.

Secondary Succession
This is a picture of secondary succession. This is the type of succession that would occur after a forest fire, flood, or deforestation.

3. Compare and contrast primary and secondary succession using a Venn diagram.

Primary vs Secondary