<Table> <Tr> <Td> </Td> <Td> This article needs additional citations for verification . Please help improve this article by adding citations to reliable sources . Unsourced material may be challenged and removed . (March 2010) (Learn how and when to remove this template message) </Td> </Tr> </Table> <Tr> <Td> </Td> <Td> This article needs additional citations for verification . Please help improve this article by adding citations to reliable sources . Unsourced material may be challenged and removed . (March 2010) (Learn how and when to remove this template message) </Td> </Tr> <P> Revegetation is the process of replanting and rebuilding the soil of disturbed land . This may be a natural process produced by plant colonization and succession, manmade rewilding projects, accelerated process designed to repair damage to a landscape due to wildfire, mining, flood, or other cause . Originally the process was simply one of applying seed and fertilizer to disturbed lands, usually grasses or clover . The fibrous root network of grasses is useful for short - term erosion control, particularly on sloping ground . Establishing long - term plant communities requires forethought as to appropriate species for the climate, size of stock required, and impact of replanted vegetation on local fauna . The motivations behind revegetation are diverse, answering needs that are both technical and aesthetic, but it is usually erosion prevention that is the primary reason . Revegetation helps prevent soil erosion, enhances the ability of the soil to absorb more water in significant rain events, and in conjunction reduces turbidity dramatically in adjoining bodies of water . Revegetation also aids protection of engineered grades and other earthworks . </P> <P> Revegetation is often used to join up patches of natural habitat that have been lost, and can be a very important tool in places where much of the natural vegetation has been cleared . It is therefore particularly important in urban environments, and research in Brisbane has shown that revegetation projects can significantly improve urban bird populations The Brisbane study showed that connecting a revegetation patch with existing habitat improved bird species richness, while simply concentrating on making large patches of habitat was the best way to increase bird abundance . Revegetation plans therefore need to consider how the revegetated sites are connected with existing habitat patches . Revegetation in agricultural areas can support breeding bird populations, but often it supports more common species, rather than those that are in decline . </P>

What is the primary purpose of ecological restoration
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