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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Salt marshes form in low-energy environments where sediments can accumulate. These areas often develop behind spits, where the shielding effect of the spit allows for calmer waters.
Step 2
As the spit develops, the area behind it becomes sheltered.
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The spit acts as a barrier, reducing wave action and allowing finer sediments to settle, further promoting the accumulation of organic material.
Step 3
Silt is deposited by the rivers which gradually builds up to form an intertidal mud flat.
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As rivers carry sediments into these sheltered waters, layers of silt accumulate, leading to the development of mud flats that are exposed during low tide.
Step 4
Vegetation which is highly adapted to environments colonises the mud which itself traps further sediment.
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Halophytes, or salt-tolerant plants, begin to establish themselves in these mud flats. Their roots stabilize the sediments, allowing more organic material to accumulate and fostering the growth of more complex plant communities.
