Invasive alien species:
Acacia mangium and the Paperbark tree Melaleuca quinquenervia were introduced by man to respectively revegetate mining sites and for the timber industry. Characterised as being invasive due to their rapid growth and expansion in the wild, these trees are capable of altering the nature of the soil thus threatening savannas and other open habitats in Guiana.
The accessibility of the dry savannah renders them susceptible to property and agricultural development which is more and more worrying. Their area has declined considerably due to a lack of understanding of their environmental role and lack of management tools. This singular habitat is being transformed into agricultural prairie maintained using fertilizers, into quarries or through speculative development.