Facilitation model - models of succession, Biology

Assignment Help:

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.


Related Discussions:- Facilitation model - models of succession

Relation between the hypophysis and the thyroid, Q. What is the relation be...

Q. What is the relation between the hypophysis and the thyroid? The hypophysis secretes TSH (thyroid- stimulating hormone). This hormone hastens the secretion of thyroid hormon

What is anti-arrhythmic pacemaker defibrillators, What is Anti-arrhythmic p...

What is Anti-arrhythmic pacemaker defibrillators ? Antiarrhythmic drugs (AADs) are classified according to whether they exert blocking actions predominantly on sodium, potassiu

Cell biology, Introduction to Cell Biology Introduction to Cell Biology i...

Introduction to Cell Biology Introduction to Cell Biology illustrate about the evolution of the cell that involves two processes: 1) Occurrence of genetic variations which are p

Describe the working of ploidy reduction, Q. During which meiosis division ...

Q. During which meiosis division does ploidy reduction take place? And Does it ploidy reduction occur in mitosis? In the cell division by meiosis ploidy reduction occurs in mei

Enumerate the working of mri scanner, Enumerate the working of MRI scanner ...

Enumerate the working of MRI scanner The MRI scanner can be 'tuned' to detect the very subtle disturbances to the magnetic field induced by the different proportions of oxygen

Growth charts, Growth Charts Management alone without any standard of ...

Growth Charts Management alone without any standard of comparison do not serve useful purpose. A number of standards have been developed to compare the measurement of any

Feeding mechanisms of animals, Feeding Mechanisms of Animals All anima...

Feeding Mechanisms of Animals All animals have evolved successful methods for extracting their required nutrition from the environment. Thus we find a diversity of feeding mec

What kind of agent causes sars, Q. SARS is a disease that appeared in 2003 ...

Q. SARS is a disease that appeared in 2003 with epidemic features in the province of Guangdong, in east China. What kind of agent causes SARS? SARS is caused by a virus from th

Mendel''s second law not for two or more phenotypical traits, Why is not Me...

Why is not Mendel's second law always valid for two or more phenotypical traits of an individual? The Mendel's second law, or the law of the independent assortment, is valid fo

Phylum arthropoda - classification of multicellular animals, Phylum Arthrop...

Phylum Arthropoda - Classification of Multicellular Animals Earlier you known how the coelom evolved and the body of the coelomates got segmented leading to evolution of segme

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd