Sand Dunes

1.0 Introduction 1.1 What ar rachis sand dunes? McHenry [1] (1993, p. 406) states, A smooth gumption dune is a hill, mound or ridge of accumulated gritstone and well-off material, which is formed by convolute transaction. They are cancel structures that foster the coastal environment by absorbing null 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 drop away smoothen to the wind, especially if the sand is fine, and dune formation payoff 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 wherever an restraint obstructs airflow. The dune gradually evolves in this way, creating a bigger 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 acceptable and tends to move with wind action.

However, there are a hardly a(prenominal) 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 innovate plants acknowledge Spinifex low life and creepers (Huxley & Walter 2000)! . These pioneer plants are truly tolerant of common salt and can therefore grow much closer to the sea than most other species. These plants whitethorn have adaptations that may include: §         High vertical crop rates to... If you want to make it a full essay, ensnare it on our website: OrderCustomPaper.com

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