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.
The difference is that primary succession begins in a new environment, like bare rock; secondary succession begins in an area from which a pre-existing community has been removed, such as a burned-out forest.Source(s): Asst Prof Â· 6 years ago.Thumbs up.econdary Succession-succession that begins after a disturbance that has left some of the previous community intact-e.g. abiotic disturbance (i.e. fire and storms) or human disturbance (agriculture, forestry, development) Similarities: 1.