Researchers detect a number of major reasons for eucalyptus decline in Australia. These reasons are climatic extremes, improper management, agricultural pollution and a variety of pathogen organisms. It is necessary to add that some types of eucalypt are more vulnerable, for instance, E. sieberi or E. marginata. At that, the decline of these types may lead to the decline of other types of eucalypt growing in the area.
As far as the reasons for the decline are concerned, climatic extremes are seen as the primary cause of eucalypt decline as recent droughts in Australia had a negative impact on the trees. Apart from droughts, frost and waterlogging are dangerous weather conditions which may lead to eucalypt decline. Trees growing in low areas where there is soil with poor drainage are especially vulnerable. The change of soil tends to lead to chronic abiotic stress in trees and their further decline. The trees which are impaired are affected by a number of species of pests which cause further decline. It is necessary to note that human activity negatively affects eucalypt as improper land management results in soil deterioration. The use of chemicals also has negative effects on eucalypt. The chemical composition of soil and its properties change as a result of agricultural activities and become unfavourable for the trees.
In conclusion, it is necessary to note that the reasons for the decline mentioned above tend to occur in combinations. Therefore, it is essential to pay attention to all the hazards to diminish eucalypt decline.