The biodiversity increases when one moves from the pioneer to the climax stage. What could be the explanation?
Ecological succession is the universal process of natural changes in the community structure on the ecological time scale. These communities are dynamic and undergoes continuous change in structure and function; important characteristic is that there structure constantly changes in response to the changing environmental conditions and these changes are directional and sequential. These changes leads to the community which is near the equilibrium with the environment is known as climax community which marks the end point of succession. The sequence of communities which replace one another level in the successional process is known as sere. The initial seral stage is Pioneer stage. More than one seral stage is evolved until the climax stage is attained. Succession slows as the community reaches the steady equilibrium stage with the environment and with the various changes in the diversity of species of organisms i.e. climax stage.
There are various attributes that have changed during late successional stage from early successional stage and these are as follows:
|
Attribute |
Early succession |
Late succession |
|
Community structure |
|
|
|
Total Biomass |
Small |
Large |
|
Inorganic nutrients |
Extra-biotic |
Intra-biotic |
|
Species richness |
Low |
High |
|
Species evenness |
Low |
High |
|
Biochemical diversity |
Low |
High |
|
Selection pressure |
|
|
|
Growth form |
r- selection |
k- selection |
|
Production |
Quantity |
Quality |
|
Homeostasis |
|
|
|
Nutrient conservation |
Poor |
Good |
|
Stability |
Poor |
Good |
|
Entropy |
High |
Low |
|
|
|
|
|
Food chains |
Linear, predominantly grazing |
Detritus |
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Ecological succession is the universal process of natural changes in the community structure on the ecological time scale. These communities are dynamic and undergoes continuous change in structure and function; importan...
Step-by-step explanation:
• Ecological succession is the universal process of natural changes in the community structure on the ecological time scale
• These communities are dynamic and undergoes continuous change in structure and function; important characteristic is that there structure constantly changes in response to the changing environmental conditions and these changes are directional and sequential
• These changes leads to the community which is near the equilibrium with the environment is known as climax community which marks the end point of succession
• The sequence of communities which replace one another level in the successional process is known as sere
• The initial seral stage is Pioneer stage
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