Landcare Revegetation :: essays research papers

Rehabilitation is the process of reclaiming land for economical or conservation purposes. This process usually involves re-vegetation. The main aim in rehabilitation is to either return the land to a self-sustaining ecosystem or prepare the land for human use, i.e. crops, pastures and plantations. Rehabilitation should take place at a rate that is significantly higher than natural succession. Several principles are implemented for successful rehabilitation. Of these principles includes the need for preventing disasters and anticipating problems before they arise, if this is taken to consideration then rehabilitation will be less costly and trouble free. When rehabilitating a site, all the components making up the ecosystem need to be looked at individually. They include soil, climate, vegetation, time and animals. These components need to interact at certain rates in order for the desired effect to be achieved and so might need to be altered. There are other principles of rehabilitation, which will be discussed, in greater detail. There are many methods and strategies involved in rehabilitation which, are specific to a site. In this case, surface mine reclamation and farmland will be looked at. A step by step illustration of the processes involved will be covered. When rehabilitating mine land, it is important to first prepare a plan before mining takes place. Researching and obtaining data on the floral and faunal elements of the ecosystem by conducting surveys of the upper, mid and under-story species present. If the aim is to restore the land to its original ecological balance and to conserve the species present, then further studies should be conducted on the ecology of the native species, i.e. seed biology of all species. Propagation techniques and the order of re-establishing species should be studied. When rehabilitation work was conducted on the bauxite mines in the southwest of W.A., special research was conducted on the germination requirements of sown seed. The aim in this case was to re-establish a self-sustaining forest, which maintains water, timber and all the valued qualities of forest. The timing component was carefully considered when removing topsoil in summer to ensure maximum seed store this was achieved when the forest was cleared after seed set took place. Hand seeding was done soon after ripping in order to ensured that the seeds other propagules were well established before germination. When conducting mining operations it is generally desirable that rehabilitation work takes place at the same rate as mining occurs. The soil component in this case needs to be removed in layers (topsoil and overburden) and stock piled during the mining process. The topsoil is very important because is contains most of the seed, propagules and micro-organisms which are needed for