The second stage of hydrosere is occupied by | vedclass

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(D) The series of biotic communities that develop one after the other in a newly formed pond or lake is called hydrosere.It starts as soon as the mudd

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Vallisneria

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(D) The series of biotic communities that develop one after the other in a newly formed pond or lake is called hydrosere.It starts as soon as the muddy water becomes clear.The pioneer stage of hydrosere is the phytoplankton stage.Death and decomposition of phytoplankton in the first seral stage produce organic matter,which mixes with clay and silt at the bottom to form soft mud.This soft mud is favourable for the growth of submerged hydrophytes in the next seral stage.Therefore,the second stage of hydrosere is occupied by submerged hydrophytes like $Vallisneria$.

The second stage of hydrosere is occupied by plants like

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