Ecological Succession: An Orderly Process of Community Development and Stabilization, Slides of Ecology and Environment

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Presentation topic

On

Ecological Succession(community dynamics)

Submitted by:

Chander shekhar

B.Sc. Forestry 4

th

yr(

th

sem.)

Richard Peters(1806) discussed first plant

succession.

Dawson(1847), Thoreau(1963), Chawles(1899)

also discussed succession.

Clements(1916) popularized and elaborated in

detail about the theory of succession.

Fig: Diagram showing different succesional stages towads

Causes of succession

1.Initial or initiating causes

2.Ecesis or continuing causes

3. Stabilising causes

Fig: initial

causes

Fig: Oak forest at climax stage

Types of succession:

Based on presence and absence of vegetation

1. Primary (autogenic)
2. Secondary(allogenic)

Based on nutritional and energy contents

1. Autotrophic
2. Heterotrophic

Based on moisture condition

1. Hydrosere
2. Xerosere –

Lithosere

Psammosere

Fig: Hydrosere

Process of succession

1.Nudation

It is the development of a bare area without any life

form.

2.Invasion

It is the successful establishment of one or more

species on the bare area.

3.Competition

Stronger one survive.

4.Coation

Influence of one community to another in number of

ways.

5.Reaction

Modification of environment by living communities.

6. Stabilization

Stabilization of stronger communities reach at climax

stage(more or less stable community i.e. for months,

years, centuries and decades)