More than 50 Australian
plant species are under threat of extinction within the next decade, according
to a major study of the country’s threatened flora.
Just 12 of the most
at-risk species were found to be listed as critically endangered under national
environment laws – the Environment Protection and Biodiversity Conservation Act
– and 13 had no national threatened listing at all.
The scientists behind
the research, published in the Australian Journal of Botany this month, say the
results point to a need for re-evaluation of Australia’s national lists for
threatened plants.
It is the first major
assessment of the status of Australia’s threatened flora in more than two
decades.
Plants account for
about 70% of Australia’s national threatened species list, with 1,318 varieties
listed as either critically endangered, endangered or vulnerable.
Among those
on the list are acacia pharangites (wongan gully wattle), banksia
vincentia, caladenia amoena (charming spider-orchid), caladenia
busselliana (Bussell’s spider orchid), calochilus richiae (bald-tip
beard orchid) and eremophila pinnatifida (dalwallinu eremophila).
The research team
assessed species that met criteria for either a critical or endangered listing
at national or state levels to track their rate of decline.
They did this by
reviewing all available literature on the plants – including recovery plans,
conservation advice and peer-reviewed research – and conducting interviews with
125 botanists, ecologists and land managers with expertise on particular
geographic regions or species.
The study examined 1,135
species, including 81 that were unearthed through the interview process as
being eligible for a critically endangered or endangered listing but did not
have one.
It found 418 plants had
continued declines in their population and a further 265 species had
insufficient monitoring information available to determine their status.
The scientists concluded
that 55 species were at high risk of extinction within the next 10 years, with
fewer than 250 individual plants or only a single population remaining. They
found just 12 of the most imperilled species were listed under the EPBC Act as
critically endangered and 13 had no listing at all.
They said there were
also 56 species of plants currently on the critically endangered list that they
assessed as having no documented declines or that were stable or even
increasing.
“This points to a clear
need for re-evaluation and standardisation of current lists, and consistent
application of IUCN listing guidelines,” the study states.
“There is also a need to
collect systematic, repeatable field data for most of [the] species, to back up
suspected and projected declines and provide a stronger basis for investment in
recovery actions.”…..