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Get Answers to all your Questions
a) What is hydrarch succession?
b) Compare the pioneer species and climax communities of hydrarch and xerarch succession respectively.
c) List the factors upon which the type of invading pioneer species depend in secondary hydrarch succession.Why is the rate bof this succession faster than that of primary succession?
Answers (1)
(a) The succession which takes place in the wetter areas and the successional series progresses from hydric to mesic conditions.
(b)
|
Species |
Hydrarch Succession |
Xerarch Succession |
|
Pioneer Species |
Pioneer community are small phytoplanktons. Eg:Diatoms |
Pioneer communities are usually lichens. Eg: Graphis lichens secrete acids to dissolve rocks, helping in weathering and soil formation. |
|
Climax Species |
Climax community would be a forest, the water body is converted into land with time. It also leads to the mesic condition. |
The climax community would be a forest. Xerarch succession also leads to mesic conditions. |
(c) Factors on which the invading pioneer species depend in a secondary hydrarch succession are –
Condition of the soil
Availability of water
The environment (due to the presence of seeds or propagates).
Rate of secondary succession is faster than that of primary succession because in area of secondary succession some soil and nutrients are already present, so succession reaches quickly.
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