d) Define succession. What are the types of
succession? What do you mean by 'Hydrosere"?
Describe the stages of Hydrosere.
1+2+ 1 = 10
সাকশেসন বলতে কি বােঝ? বিভিন্ন প্রকার সাকশেসন বর্ণনা
কর। হাইড্রোসিরি কি? হাইড্রোগিরির বিভিন্ন ধাপ বা
পর্যায়গুলি দণনা কর।
Answers
a number of people or things of a similar kind following one after the other.
Two different types of succession—primary and secondary—have been distinguished. Primary succession occurs in essentially lifeless areas—regions in which the soil is incapable of sustaining life as a result of such factors as lava flows, newly formed sand dunes, or rocks left from a retreating glacier. Secondary succession occurs in areas where a community that previously existed has been removed; it is typified by smaller-scale disturbances that do not eliminate all life and nutrients from the environment.
A hydrosere is a plant succession which occurs in an area of fresh water such as in oxbow lakes and kettle lakes. In time, an area of open freshwater will naturally dry out, ultimately becoming woodland. During this change, a range of different landtypes such as swamp and marsh will succeed each other.
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