SANDY BEACHES

SANDY BEACHES PowerPoint PPT Presentation


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Same 3 zones as the J/G. Now these zones are on a horizontal plane instead of a vertical one.a. Supra-littoral zone ? begins at the base of the dunes and extends to the high tide line.. . Littoral zone ? the zone between the high tide and the low tide lines.Sublittoral zone ? the zone below th

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SANDY BEACHES

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1. SANDY BEACHES

2. Same 3 zones as the J/G Now these zones are on a horizontal plane instead of a vertical one. a. Supra-littoral zone – begins at the base of the dunes and extends to the high tide line.

3. Littoral zone – the zone between the high tide and the low tide lines. Sublittoral zone – the zone below the tide lines.

4. Factors that affect the beach Thixotropy - the ability of a solid to behave as a gel or liquid when agitated. This is used as a means of escape to some beach animals. Insulation – burrowing animals need to be insulated from the heat/cold of the beach. The pore space (20%) between grains traps and holds air for insulation.

5. Harsh environment Conditions to contend with at the beach: Pounding surf Blowing abrasive sand Period of dryness and wetness Temperature changes Exposure to the sun

6. Differences between S.B. and J/G Wave action if much less on the beach. Organisms can burrow on the beach to escape. There is more space to cover on the beach, so movement is easier and faster than on the jetty/groins.

7. Conditions tend to stay mostly the same on the beach. Organisms on the beach are more motile than those of the j/g. There are more animals at the beach.

8. Dunes – affected more by the wind than the water. Beach face – affected more by the water than the wind.

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