Examples of ecological succession

Ecological succession is the gradual process by which ecosystems change and develop over a peperiod  of time. In the process of succession, the species present in an area will gradually change. Succession takes place because of the changes in the environmental conditions in a particular place over a period of time Each species is adapted to thrive and compete best against other species under a very specific set of environmental conditions If these conditions change, then the existing species will be replaced by a new set of species which are better adapted to the new condemns.

Ecological succession may also occur when the conditions of an environment suddenly and drastically change. A forest fare. Wind storm and human activities like agriculture all greatly alter the conditions of an Environment.  dominance among the species still present Observed changes in the structure and function of communities in the intermediate stages of ecological succession generally result from natural selection of individuals within their current environment. Three mechanisms by which species may replace each other have been proposed the relative Importance of each depends on the nature of the community and stage of development The following are the three proposed hypothesis pertaining to the mechanism of replacement.


The tolerance hypothesis  
Evade and replace them by reducing resource levels below those tolerated by earlier occupants.Successions proceeds despite the resistance of earlier colonists