Threatened Plants
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Threatened plants are those plant species considered to be at risk
of extinction in the wild on either a National, State or Regional
basis. In South Australia, we refer to these species as Endangered,
Vulnerable to extinction, or Rare.
Threatened plants are subjected to a range of threatening processes.
We are working with the community to
overcome these threats and help in the recovery of our region's
threatened plants.
Ninety-seven nationally threatened plant species listed under the
Environment Protection and Biodiversity Conservation (EPBC)
Act 1999 occur in South Australia. At a State level, about
22 percent of South Australia's plant species are listed as threatened
in South Australia under the National Parks and Wildlife (NP&W)
Act 1972 (ie 785 out of a total of 3500 plant species recorded
in the State). This includes species considered extinct in South
Australia. For more information see the Department for Environment
and Heritage Threatened
Species web page and the State
of the Environment Report for South Australia 2003.
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Nationally Vulnerable Silver Daisy-bush Olearia
pannosa ssp.
pannosa
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West Region's Threatened Plants
The flora of West
Region is unique. The region is where
the 'East meets the West' in terms of Australian plants, resulting
in a unique mixture of species. West Region is also home to a large
number of plant species that are found nowhere else in the world.
We call these species 'endemic'. There are approximately 40 endemic
plant species on Eyre Peninsula.
Unfortunately West Region also has a relatively high number of
plant species that are threatened with extinction. On Eyre Peninsula,
26 plant species are listed as nationally threatened under the Environment
Protection and Biodiversity Conservation Act 1999. Ten
of these nationally threatened plants are endemic to the peninsula.
At a State level, 132 plants found on Eyre Peninsula are listed
under the National
Parks and Wildlife Act 1972 as threatened in South Australia.
A number of plants are also considered threatened on a regional
level.
Due to a lack of scientific understanding about non-vascular plants
(eg mosses, liverworts and algae) and aquatic plant species, it
is unclear how many of these types of plants are also threatened,
but it could be a significant number.
See Threatened Plants on Eyre
Peninsula brochure (1.5Mb PDF).
See Threatened Flora of
the South Australian Department for Environment and Heritage's
West Region (550Kb PDF) for a list
of threatened plant species found on Eyre Peninsula and the Far
West.
See the Threatened Plants of Eyre Peninsula
and the Far West for a list of selected threatened plants found
in our region.
Threats
Species that are threatened often live in less than ideal situations,
where various processes affect their ability to survive and reproduce.
The threatening processes affecting the plants of the West
Region vary between species and populations, however common
threats include:
- changed fire patterns
- changed water patterns
- climate change
- competition with weeds (eg Bridal Creeper and Perennial
Veldt Grass)
- diseases such as the root rot fungus Phytophthora,
an infectious soil and waterborne fungi that causes plant dieback
- disturbance by vehicles
- fragmented habitat
- grazing by herbivores (eg by introduced animals such as
livestock, rabbits and goats, and by native animals such as kangaroos)
- habitat loss from building development
- land clearance and modification of habitat
- loss of native pollinators (eg insects and small animals)
- road and rail maintenance
- rubbish dumping
- salinity.
These threats are not listed in order of importance, because they
differ between species and populations.
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| Inspecting
damaged vegetation caused by roadside maintenance at an Endangered
Fat-leaf Wattle site |
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Purple-flowered
Polygala weeds invading critical habitat of the Endangered Metallic
Sun-orchid |
Recovery
The Draft Recovery Plan for 23 Threatened Flora Taxa on Eyre Peninsula, South Australia 2007-2012 (4.5Mb PDF) is one of the most diverse multi-species regional recovery action plans in Australia. It addresses 21 nationally listed and two state listed threatened plant species found on Eyre Peninsula. The Plan provides a comprehensive summary of the region’s threatened flora information and prioritised actions for today’s natural resource custodians.
The Draft Recovery Plan is open for public comment until 30 June 2008. See Latest News for details on how you can make a written submission.
The Draft Recovery Plan for 23 Threatened Flora Taxa on Eyre Peninsula, South Australia 2007-2012 (4.5Mb PDF) aims to address two long-term conservation goals over 30 years:
Goal 1. Recover threatened plant species critical habitat on Eyre Peninsula
Goal 2. Recover threatened plant species populations on Eyre Peninsula.
Recovery of threatened flora species is defined by five objectives:
- Obtain baseline information, including critical and potential habitat, for each threatened flora species
- Increase understanding, appreciation and involvement in threatened flora recovery efforts
- Manage immediate threats and improve threatened flora critical habitat
- Conduct research critical to management by addressing knowledge deficiencies in threatened flora biology and ecology (including threat identification)
- Monitor threatened flora populations and evaluate the success of recovery actions.
In West
Region, progress is already being made on many of these recovery objectives. For examples of this work, see the Threatened Plant Recovery Projects section.
For more information about the Draft Recovery Plan:
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| Ironstone Mulla Mulla survey
grids, including this one burnt in the 2005 Black Tuesday bushfire,
are monitored annually |
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Markers are installed to
identify and protect significant roadside plant and animal habitat
during road maintenance works |
Threatened Species Updates
We regularly publish Threatened Species Updates to keep interested
people up-to-date with threatened plant conservation activities
on Eyre Peninsula.
Community Involvement
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| Conservation Volunteers Australia participants
controlling the weed Tree Lucerne near threatened plants |
Volunteers and community groups greatly assist our work and play
a key role in threatened plant recovery on Eyre Peninsula and the
Far West. Groups that have contributed to the project include:
How You Can Help
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| Take photos instead of picking native flowers |
Everyone can be involved in helping to save threatened species.
If you are interested in volunteering for threatened plant recovery
projects on Eyre Peninsula and the Far West, please fill out and
submit a Volunteering
Form or contact us for more information.
Please be aware of native plants and help preserve them by:
- preventing damage caused by grazing animals
- controlling weeds to reduce competition
- preventing removal of native plants by land clearance and
illegal collection
- taking photos instead of picking native flowers
- joining your local Landcare, Friends of Parks, or similar
group and looking after a threatened plant population
- reporting any new sightings of threatened plants to the West
Region Threatened Flora Officer, so they can be added to the
statewide database and used in future management of the species.
For other ideas on how you can help protect our natural environment
see Green Tips.
Potential Research Projects
Staff from the West Region of the Department for Environment and
Heritage and local volunteers are keen to work in partnership with
postgraduate students and other groups on research projects aimed
at increasing our knowledge about the biology and ecology of threatened
plants in our region.
See our list of potential research projects.
Threatened Plant Recovery Projects
Native Orchid Volunteers
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Volunteers monitoring
native orchids
Photo: Ivon Perrin |
A small number of enthusiastic orchid volunteers regularly visit
bushland and roadsides across lower Eyre Peninusla to find, monitor
and photograph native orchids. Native orchids are often cryptic
and difficult to find, but the volunteers have located several previously
unknown populations of threatened orchids, including the Metallic
Sun-orchid (250Kb PDF) and Winter Spider-orchid.
Eyre Peninsula is home to five Nationally threatened orchid species,
two of which are found only on Eyre Peninsula.
Our volunteers have produced a practical field guide Orchids
of Lower Eyre Peninsula (published by Pam Hewstone and Jane
Hutchinson, ISBN 0-646-41938-2). Copies are available for purchase
from the Department for Environment
and Heritage office in Port Lincoln.
See Metallic Sun-orchid Information
Sheet (250Kb PDF).
See video footage of Metallic Sun-orchid habitat after fire, and
the plant's flowers opening in sunlight to attract pollinators (4.2Mb
file).
Bead Samphire Monitoring
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| Tagging, mapping and monitoring threatened
Bead Samphire plants |
With the help of local volunteers, we are monitoring populations
of Bead Samphire (100Kb PDF), a plant listed
nationally as Vulnerable to extinction. Bead Samphire grows in saltmarshes
and samphire flats, often on the foreshore of salt lakes and on
saline flats. The species has been identified as a potential indicator
of signs of climate change, particularly environmental changes associated
with rising sea-levels, so monitoring Bead Samphire is important
work.
Bead Samphire plants are monitored at Fowlers Bay, Acraman Creek
and Sceale Bay conservation parks, and Arno Bay. Population structure
is being monitored to assess changes in the number of juvenile plants,
small adults, adults, and those plants that are dying or damaged.
See Bead Samphire Information
Sheet (100Kb PDF).
West Coast Mintbush Recovery
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| West Coast Mintbush in
flower, showing few signs of grazing damage |
West Coast Mintbush (100Kb
PDF) is found nowhere else in the world but on Eyre Peninsula
and the Far West (ie it is endemic to our region). The species is
listed nationally as Vulnerable to extinction. We are working
with the community to conduct grazing monitoring and baseline
surveys to help West Coast Mintbush populations recover.
West Coast Mintbush is threatened by grazing herbivores including
kangaroos, rabbits and livestock. Our monitoring project aims to
assess how much West Coast Mintbush plants are being grazed, and
how this grazing is impacting the plants' reproduction success.
We are also trying to improve our understanding of where West Coast
Mintbush is found. Land-holders and community members on Eyre Peninsula
and the Far West are encouraged to contact
us for an information pack to help record mintbushes in the
local area.
See West Coast Mintbush Information
Sheet (100Kb PDF).
Schools
A number of schools have made an important contribution to the
recovery of threatened plants on Eyre Peninsula and the Far West.
Projects have included:
- Saving Silver Daisy-bush - Cleve Area School
- Saving threatened wattles - Cummins Area School
- Saving Whibley's Wattle - Tumby Bay Area School.
See For Schools.
Green Corps
Several Green
Corps teams have been involved in threatened plant conservation
activities on Eyre Peninsula including:
Green Corps is an Australian Government youth development and environmental
training program for young people aged between 17 and 20 years.
See the
Green Corps website.
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| Green Corps
participants fenced Endangered Chalky Wattles to protect the
plants from grazing |
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Green Corps
team members cleaning seed collected from native plants |
Lower Eyre Peninsula Bushfire Recovery
At least seven nationally threatened plant species were impacted
by the 2005 Black Tuesday bushfire. The Department for Environment
and Heritage has coordinated a scientific program to undertake threatened
plant recovery actions as part of the Lower Eyre Peninsula Bushfire
Re-establishment Program.
See Lower Eyre Peninsula
Bushfire Re-establishment Program: Scientific Program.
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| Collecting seed from Alcock's Wattle Acacia
alcockii, listed as Rare in South Australia |
Botanic Gardens of Adelaide Seed Conservation Centre
Our on-the-ground threatened plant recovery projects are complemented
by the important work of the Botanic
Gardens of Adelaide Seed Conservation Centre. The primary objective
of the Seed Conservation Centre is to undertake seed collections
of priority plant species throughout South Australia for the establishment
of long-term seed conservation collections, and development of germination
and storage protocols for each species collected. Seed from West
Coast Mintbush, Whibley's Wattle, Tufted Bush-pea, and other local
threatened plants has been collected by the Seed Conservation Centre
as part of the international Millenium Seed Bank Project.
See the Botanic
Gardens of Adelaide Seed Conservation Centre.
Threatened Plants of Eyre Peninsula and
the Far West
The following section lists a selection of threatened plant species
found in the West
Region. More information about some of these species is available
by accessing the information sheets, web pages and reports via the
links provided.
See Threatened Flora of
the South Australian Department for Environment and Heritage's
West Region (550Kb PDF) for a list
of threatened plant species found on Eyre Peninsula and the Far
West.
For more information about individual nationally threatened plant
species, see the Australian
Department of the Environment, Water, Heritage and the Arts Species Profile
and Threats (SPRAT) Database. You can search the SPRAT database
for a species profile for any nationally threatened plant species.
The database provides information on what the species looks like,
its population and distribution, habitat, reproduction, taxonomy,
and a useful reference list.
List of Selected Nationally Threatened Plant Species
Found in the West Region
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Nationally Endangered Corruna Daisy Brachycome
muelleri
(Photo: Manfred Jusaitis) |
Endangered (Commonwealth Environment
Protection and Biodiversity Conservation Act 1999)
Vulnerable (Commonwealth Environment
Protection and Biodiversity Conservation Act 1999)
- Feathery Wattle or Imbricate Wattle Acacia imbricata
- Resin Wattle or Neat Wattle Acacia rhetinocarpa
- Club Spear-grass Austrostipa nullanulla
- Winter Spider-orchid Caladenia brumalis syn. Arachnorchis brumalis
- Slender Bell-fruit Codonocarpus pyramidalis
- Bead Samphire Halosarcia flabelliformis - Information
Sheet (100Kb PDF)
- Granite Mudwort Limosella granitica
- Microlepidium alatum
- Silver Daisy-bush Olearia pannosa ssp. pannosa
- Information Sheet (300Kb
PDF)
- Silver Candles Pleuropappus phyllocalymmeus
- West Coast Mintbush Prostanthera calycina - Information
Sheet (100Kb PDF)
- Nodding Rufous-hood Pterostylis aff. despectans syn. Oligochaetochilus mirabilis
- Desert Greenhood Pterostylis xerophila syn. Oligochaetochilus xerophilus
- Ironstone Mulla Mulla or Becker's Pussy-tail Ptilotus beckerianus
- Information
Sheet (50Kb PDF)
- Tufted Bush-pea Pultenaea trichophylla
- Large-flower Groundsel or Superb Groundsel Senecio megaglossus
- Information
Sheet (450Kb PDF)
- Annual Candles Stackhousia annua
- Yellow Swainson-pea Swainsona pyrophila
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| Nationally
Vulnerable Granite Mudwort Limosella
granitica |
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Nationally
Vulnerable Silver Candles Pleuropappus
phyllocalymmeus |
List of Selected State Threatened Plant Species Found
in the West Region
Endangered (South
Australian National Parks and Wildlife Act 1972)
- Mt Olinthus Greenhood Pterostylis "Mt Olinthus"
syn. Oligochaetochilus sp. "Mt Olinthus"
Vulnerable (South
Australian National Parks and Wildlife Act 1972)
- Sandalwood Santalum spicatum
Video Footage
See video footage of Metallic Sun-orchid habitat after fire, and
the plant's flowers opening in sunlight to attract pollinators (4.1Mb
file).
See video footage of Fat-leaf Wattle at a roadside site (4Mb
file). Note the wattle's fat, fleshy phyllodes (leaf-like
structures). The video also highlights the threat of habitat fragmentation.
Fat-leaf Wattles are now mainly restricted to roadsides and rail
reserves. The wattles in the video have been badly damaged during
road maintenance.
More information
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