Explain the development of saltmarsh environments.
- AQA - A-Level Geography - Question 3 - 2019 - Paper 1
Question 3
Explain the development of saltmarsh environments.
Worked Solution & Example Answer:Explain the development of saltmarsh environments.
- AQA - A-Level Geography - Question 3 - 2019 - Paper 1
Step 1
Salt marshes tend to develop in sheltered estuaries behind spits
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Answer
Salt marshes are typically formed in sheltered areas where estuaries exist behind spits. The formation of a spit leads to reduced wave energy, allowing for sediment deposition.
Step 2
As the spit develops, the area behind it becomes sheltered
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Answer
This sheltered environment promotes the accumulation of fine sediments and silt due to the reduced water movement, laying the foundation for the salt marsh ecosystem.
Step 3
Silt is deposited by the rivers
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Rivers deposit silt and mud, which gradually builds up to form an intertidal mud flat. This mud flat continues to build and rise above sea level with the addition of further silt.
Step 4
Vegetation which is highly adapted to the environment colonises the mud
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Salt marsh vegetation, primarily halophytic (salt-loving) plants, begins to colonize these mudflats, further stabilizing the environment and contributing to the development of the salt marsh ecosystem.
