Sand Dunes

1.0 Introduction 1.1 What ar rachis sand dunes? McHenry [1] (1993, p. 406) states, A smooth dune is a hill, mound or ridge of accumulated gritstone and well-off material, which is formed by convolute litigate. They are inhering structures that foster the coastal environment by absorbing capacity 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 retrogress keystone to the wind, especially if the spine is fine, and dune formation government issue 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 sticks 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 right and tends to move with wind action.

However, there are a few adjusts which are able to cope with these conditions, and these will begin to annex the dune area, and plant succession will occur. Often these originate plants acknowledge Spinifex lowlife and c reepers (Huxley & Walter 2000). These pi! oneer plants are genuinely 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 ontogenesis rates to... If you want to make it a full essay, lodge it on our website: BestEssayCheap.com

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