When considering classical mathematics, the Greeks must be a main focus of our attention. In fact, the primary reason for discussing earlier mathematics is to understand what the Greeks inherited and what they left to their posterity.
The organisms that engage in primary succession are known as pioneer species. Typical pioneer species include simple lichens, algae, and fungi. These simple organisms begin breaking down the resources in the environment and make it suitable for the later introduction of more complex species, such as vascular plants.
Primary ecosystem succession is when a community first forms in a newly created or exposed area such as a sand dune or bare rock surface, lava flow, or a new lake created by flooding. In a sense, this is as if the community forms from a clean slate ecologically speaking.ires are the major source of disturbance in this ecosystem. Fires come through in cycles of between 10 and 15 years or sometimes longer. The plants and animals here must be adapted to long periods of dryness and mild, winter time precipitation.