lecture8 - Coastal Dune Communities Foredune Environment...

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Coastal Dune Communities Foredune Environment Dune Succession Pioneer Dune Plants Dune Scrub Reading California Vegetation: pages 137-149 and 151-152 Plants of SLO: page 69 (Plant descriptions on page 70-83) Coastal Sand Dune Communities Sand dunes are discontinuous along the entire California coast 23% of California’s coast has sandy beaches A lesser area has coastal dunes (~1%) Coastal Sand Dune Communities The sand that forms beaches and dunes is the product of erosion , much of it on land Ocean currents move sand grains to beaches Coastal Sand Dune Communities Dunes form where sea breezes blow sand inland Dune Succession Once sand has blown above the high tide level, plants begin to colonize it Each plant colonist becomes the center of a pile of sand When the branches or leaves of a plant slow the moving air, sand particles drop The accumulating sand grains gradually bury the plant, forming a mound or hummock Dune Hummocks
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Dune Succession Plants gradually cover a dune,
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This note was uploaded on 02/07/2011 for the course BIO 114 taught by Professor Ritter during the Spring '09 term at Cal Poly.

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lecture8 - Coastal Dune Communities Foredune Environment...

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