Chapter_12s

Chapter_12s - Chapter 12 Coastal Habitats The term coast...

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The term coast has a much broader meaning than shoreline and includes many other habitats and ecosystems associated with terrestrial and marine processes. The six major coastal settings are: estuary lagoon salt marsh mangrove swamp coral reef Chapter 12 Coastal Habitats
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Estuaries are semi-enclosed bodies of water, where river water mixes with ocean water. Types of estuaries by origin: drowned river valleys fjords bar-built estuaries tectonic estuaries Estuaries
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Estuaries Some estuaries were formed when river mouths were drowned as sea level rose.
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Estuaries Fjords occur in high latitudes. Steep valleys were carved by advancing glaciers. When the glaciers retreated, the valleys filled with seawater.
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A bar-built estuary forms when longshore transport extends a sand bar across an embayment. Estuaries
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Estuaries Tectonic estuaries form when faulting and folding at tectonically active boundaries created basins.
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Estuaries Estuaries are influenced by two important factors. The input of freshwater from the river , which stratifies the water column. Tidal flow, which provides energy to mix the fresh and salt water. The relative importance of these two factors determines circulation in the estuary.
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A salt-wedge estuary Effects of river input dominate. Tidal currents are too weak to mix.
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This note was uploaded on 04/13/2008 for the course OCE 1001 taught by Professor Staff during the Spring '08 term at FSU.

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Chapter_12s - Chapter 12 Coastal Habitats The term coast...

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