Sand Dunes

1.0 Introduction 1.1 What argon rachis dunes? McHenry [1] (1993, p. 406) states, A smooth back dune is a hill, mound or ridge of accumulated backbone and well-off material, which is formed by convolute put through. They are instinctive structures that foster the coastal environment by absorbing verve from wind, surge and wave action. 1.2 Formation of Sand Dunes Sand dunes are formed by accretion, which is the increase of land by the action of natural forces. any(prenominal) part of the upper beach, once dry, can fall behind mainstay to the wind, especially if the sand is fine, and dune formation retort in the direction which the predominant wind direction is blowing. As claimed by McHenry [2] (1993, p. 754) Sand dunes are also formed as the wind carries depositary from the beach in a landward direction, depositing it wheresoever an restraint obstructs airflow. The dune gradually rises in this way, creating a large block to sand particles being airborne. With high wind speeds, sand is continually pushed over the crest of the primary dune. This causes new sand dunes to digit up behind the first dune, eventually forming a serial publication of dunes from the seashore, inland. 1.3 Succession and Zonation in Sand Dune Communities Huxley and Walter (2000, p. 127) found that as a dune forms, sand is unst comforting and tends to move with wind action.

However, there are a fewer adjusts which are able to cope with these conditions, and these will begin to colonize the dune area, and plant succession will occur. Often these open up plants acknowledge Spinifex lowlife a nd creepers (Huxley & Walter 2000). Thes! e pioneer plants are really tolerant of common salt and can therefore grow much closer to the sea than most other species. These plants may have adaptations that may include: §         High vertical increase rates to... If you want to make it a full essay, set up it on our website: BestEssayCheap.com

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