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15 Cards in this Set
- Front
- Back
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Common features of beachs/dune systems on barrier island?
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Waves, Dunes, Maritime hammocks pond and marshes.
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forces that create the features?
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Wind and waves acting on sand and shells
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where are forests found on barrier islands?
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exclusively on stabilzed backdunes.
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What is a Climax Community?
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Biological community of plants and animals that has reached equilibrium or steady state.
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Equilibrium occurs because?
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The Climax community is composed of species best adapted to average conditions in that local area.
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Factors influencing climax communities?
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Strong winds
Low nutrients Unpredictable supply of freshwater Sand migration,Salt spray |
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This Barrier Island formed?
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6000 years ago
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Where do beaches form?
Where do wetlands form? |
beaches form where the waves are highest and have high energy.
Wetlands form in low energy situations |
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Beaches grow when?
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when a major storm piles up a ridge of sand offshore and sand fills the space between them
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What role does a sea oat have in building dunes?
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Fast metabolic rate allows it to grow fast and accumulate sand around it long enough to build a dune.
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beach erosion occurs when?
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Some storms drag beaches back into the ocean. Sea level rise and increased storms cause major beach erosion
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The sand came from where?
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when rivers delivered sand to the coast and was picked up by water and distributed onto beaches,and barrier islands
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When did the sand formation begin?
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2-5 million years ago
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what are the 5 major forces that limit plant life on dunes?
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1)wind
2)continual bombardment-wind blown sand 3)rain-drains away fast 4)salt spray 5) extreme temperatures |
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How do sea oats survive the dunes?
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1) sand accumulation stimulates root growth from stems
2) waxy coating protects from sand and salt spray 3) Rain washes salt to root for nourishment |
