Facilitation model - models of succession, Biology

Facilitation Model - Models of Succession

This is considered as the classical model of succession. It is based on the assumption that species of a previous stage are replaced by the succeeding stage. And at each stage the species modify their own environment to make it progressively less suitable for themselves and increasingly more suitable for succeeding colonisers. Based on these characteristics Connell and Slayter (1977) proposed the facilitation model. To explain it better let us consider the example of succession in a pond.

253_Facilitation Model.png

Figure: Facilitation Model

You may have noticed that due to the death and decay of different species of plants, siltation takes place and bottom of ponds is raised and the conditions become less suitable for their own survival and more suitable for the establishment of succeeding species. The essence of the facilitation model is that species of early stages of succession modify their own environment in a way that inhibits their own regeneration but facilitates the entry and survival of species of next higher stage of succession. For many years this model was considered to be the only one. For the early stages of primary succession, it still seems to provide the best explanation of what is actually observed. But for later stages of primary succession and for secondary succession in forests or grasslands this model is not fully tenable.

Posted Date: 1/21/2013 12:31:10 AM | Location : United States

Related Discussions:- Facilitation model - models of succession, Assignment Help, Ask Question on Facilitation model - models of succession, Get Answer, Expert's Help, Facilitation model - models of succession Discussions

Write discussion on Facilitation model - models of succession
Your posts are moderated
Related Questions
Define the Fehling's Soxhlet method (Lane-Eynon method)? This is a titrimetric method that is commonly used in food laboratories to estimate percentage of reducing sugars and t

The specific immune (defense mechanisms) response can be broadly classified into two types: a)  Cell mediated immune response: This  is achieved through large number of acti

What is the main moral problem about the cloning of human individuals? Besides biological perils, a very serious moral problem includes the nucleus transplantation technology c

Define the Basic Types of Drying Process? Primarily, there are three basic types of drying process: a) Sun drying and solar drying;  b) Atmospheric drying including batch

Factors affecting vitamin utilization Raw soybean contains enzyme lipoxygenase which can be destroyed by heating for 5 min with steam at atmospheric pressure. Lipoxygenase cata

Circulation of nutrients in the coastal zone Circulation of nutrients from the sea bottom to the upper surface, occurs in the coastal regions by two processes Upwelling

What  is  HACCP? HACCP, as you may  already know,  is an acronym that stands for Hazard Analysis Critical  Control Point,  a systematic, science-based approach  used  in  food

How are the antibodies against the Rh factor formed? Anti-Rh antibodies are made by humoral immune response. When an Rh- individual makes contact with the Rh factor this is rec

How to reduce calorie intake from fat? Efforts should be made to increase the nutrition knowledge of the general public through mass media. The foods with lower fat co

Integral plasma membrane proteins are also synthesized by ribosomes on the RER, but become inserted in the rough endoplasmic reticulum membrane rather than transported into the lum