The koala population in South-East Queensland's
important Koala Coast region declined by 26 per cent since 1999. The research
also showed that area designated as the Urban Footprint in the State
Government's SEQ Regional Plan, had sustained 42 percent of the koala
population in the 1996-99 survey period and now supported only 33 per cent of
the koala population.
Koala numbers are declining due to habitat
loss and fragmentation. Additional threats come from
vehicular trauma and dog attacks, which are a consequence of urbanisation.
An increased prevalence of disease, primarily associated with chlamydial infections, as a secondary effect of
the loss and associated fragmentation of habitat is placing even more pressure on the survival of the koala.
Climate changing is another important fact.
http://www.ehp.qld.gov.au/wildlife/koalas/research/pdf/koala-coast-report2010.pdf