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semi-enclosed coastal body of water has free connection with the open sea and within which sea water is measurably dilued with freshwater derived from land drainage
birth and death of esutary
birth- sea levels rise and drowns low lying valleys near the sea
Death- filled with sediment and without sea-level rise
salt marshes are beds of intertidal rotted vegetation which are alternately inundated and drained by the tides
requirements for salt marsh and mangroves
protected shores with fine sediment
temperature - marshes temperate
- mangroves tropical
ecological equivalent of salt marshes in tropical areas.
contains trees adapted to saline water
supports a diverse and conspicuous assemblage of invertebrates and luxuriant macroalgal growth that produce more organic material than almost any other intertidal habitat
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