Peppermint Box (Eucalyptus odorata) - Department of Sustainability ...
Peppermint Box (Eucalyptus odorata) - Department of Sustainability ...
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EPBC Act Policy Statement 3.7<br />
Nationally Threatened Species and Ecological Communities<br />
<strong>Peppermint</strong> <strong>Box</strong> (<strong>Eucalyptus</strong> <strong>odorata</strong>) Grassy Woodland<br />
<strong>of</strong> South Australia and Iron-grass Natural Temperate<br />
Grassland <strong>of</strong> South Australia<br />
June 2007<br />
ENVIRONMENT PROTECTION AND BIODIVERSITY CONSERVATION ACT
GUIDE TO LISTING<br />
What is the <strong>Peppermint</strong> <strong>Box</strong> (<strong>Eucalyptus</strong><br />
<strong>odorata</strong>) Grassy Woodland <strong>of</strong> South Australia?<br />
The <strong>Peppermint</strong> <strong>Box</strong> (<strong>Eucalyptus</strong> <strong>odorata</strong>) Grassy<br />
Woodland <strong>of</strong> South Australia ecological community<br />
extends from the southern Flinders Ranges to Lake<br />
Alexandrina. It is mostly found in the Flinders–L<strong>of</strong>ty<br />
Block Bioregion but patches also extend into the<br />
Murray–Darling Depression, Kanmantoo, Eyre–Yorke<br />
Block and Gawler Bioregions. Its general distribution<br />
is illustrated on the general area map (opposite).<br />
Remaining patches <strong>of</strong> this ecological community<br />
typically occur on gentle to moderate slopes,<br />
hilltops and adjacent plains. The soil types range<br />
from sandy-loam to clay-loam. The annual rainfall<br />
is between 310 and 610 millimetres a year.<br />
<strong>Peppermint</strong> <strong>Box</strong> (<strong>Eucalyptus</strong> <strong>odorata</strong>) is the dominant<br />
species <strong>of</strong> the tree canopy. The woodland tree form<br />
(a single main trunk at the base with low branches)<br />
<strong>of</strong> <strong>Peppermint</strong> <strong>Box</strong> characterises this ecological<br />
community.<br />
Other tree species that may be present in the<br />
canopy but are not as abundant as <strong>Peppermint</strong><br />
<strong>Box</strong> include: Grey <strong>Box</strong> (E. microcarpa); South<br />
Australian Blue Gum (E. leucoxylon); Sugar Gum<br />
(E. cladocalyx); Mallee <strong>Box</strong> (E. porosa); Drooping<br />
Sheoak (Allocasuarina verticillata); White Cypresspine<br />
(Callitris glaucophylla); and Southern Cypresspine<br />
(C. gracilis).<br />
The vegetation structure is an open to dense<br />
woodland. The tree canopy comprises low trees,<br />
generally 5–10 metres tall but sometimes up to<br />
15 metres tall, with a typical canopy cover <strong>of</strong><br />
5–40 per cent which can occasionally reach<br />
70 per cent (Hyde 1996; Robertson 1998).<br />
2<br />
The ground layer mainly comprises grasses and<br />
herbs which can vary from a relatively dense and<br />
diverse layer, in more open sites, to a sparse layer<br />
under more densely wooded sites. The grasses and<br />
herbs that most <strong>of</strong>ten occur include Wallaby Grasses<br />
(Austrodanthonia spp.), Spear Grasses (Austrostipa<br />
spp.), Iron-grasses (Lomandra spp.) and Black-anther<br />
Flax Lily (Dianella revoluta). Shrubs are sparse in the<br />
understorey with cover up to 30 per cent. The most<br />
common shrub species present are Sweet Bursaria<br />
(Bursaria spinosa) and Golden Wattle (Acacia<br />
pycnantha).<br />
A list <strong>of</strong> the main plant species known to occur in<br />
the <strong>Peppermint</strong> <strong>Box</strong> (<strong>Eucalyptus</strong> <strong>odorata</strong>) Grassy<br />
Woodland <strong>of</strong> South Australia ecological community<br />
is at Table 1.<br />
Shrubs can occur naturally in grassy woodlands,<br />
and can form an important part <strong>of</strong> the <strong>Peppermint</strong><br />
<strong>Box</strong> (<strong>Eucalyptus</strong> <strong>odorata</strong>) Grassy Woodland <strong>of</strong><br />
South Australia ecological community. Where they<br />
occur, they provide important habitat for many<br />
bird and insect species. Accordingly, a patch that<br />
has a significant ground layer <strong>of</strong> tussock grasses,<br />
and where the distribution <strong>of</strong> shrubs is scattered<br />
or patchy, is this ecological community. A remnant<br />
with a continuous shrub layer, in which the shrub<br />
cover is greater than 30 per cent, is excluded. As<br />
the shrub cover in this ecological community is<br />
naturally patchy, shrubs may be dominant over a<br />
very localised area.<br />
<strong>Peppermint</strong> <strong>Box</strong> (<strong>Eucalyptus</strong> <strong>odorata</strong>) Grassy Woodland<br />
(Peter Komidar)
Table 1. Characteristic flora <strong>of</strong> the <strong>Peppermint</strong> <strong>Box</strong> (<strong>Eucalyptus</strong> <strong>odorata</strong>) Grassy Woodland <strong>of</strong> South<br />
Australia ecological community, based on Hyde (1996) and Robertson (1998)<br />
Layer Species Common name(s)<br />
Dominant tree<br />
canopy<br />
<strong>Eucalyptus</strong> <strong>odorata</strong> <strong>Peppermint</strong> <strong>Box</strong><br />
Tree canopy Allocasuarina verticillata Drooping Sheoak<br />
Callitris glaucophylla White Cypress-pine, White Cypress, White Pine,<br />
Callitris gracilis Murray Pine, Mallee Pine, Slender Cypress-pine, Southern<br />
Cypress-pine<br />
<strong>Eucalyptus</strong> cladocalyx Sugar Gum<br />
<strong>Eucalyptus</strong> goniocalyx Long-leaved <strong>Box</strong>, Bundy<br />
<strong>Eucalyptus</strong> leucoxylon Blue Gum, Yellow Gum, South Australian Blue Gum, Water<br />
Gum, White Ironbark<br />
<strong>Eucalyptus</strong> microcarpa Grey <strong>Box</strong>, Narrow-leaved <strong>Box</strong>, Inland Grey <strong>Box</strong>, Western<br />
Grey <strong>Box</strong><br />
<strong>Eucalyptus</strong> porosa Mallee <strong>Box</strong>, Black Mallee-box<br />
Exocarpos cupressiformis Cherry Ballart, Native Cherry, Wild Cherry, Cherry Wood<br />
Shrub layer Acacia pycnantha Golden Wattle, Broad-leaved Wattle<br />
Beyeria lechenaulti Pale Turpentine Bush<br />
Bursaria spinosa Australian Blackthorn, Bursaria, Blackthorn, Native<br />
Blackthorn, Sweet Bursaria, Whitethorn, Christmas Bush<br />
Einadia nutans ssp. nutans Climbing Saltbush, Nodding Saltbush<br />
Enchylaena tomentosa var. tomentosa Ruby Saltbush, Barrier Saltbush<br />
Eutaxia microphylla var. microphylla Eutaxia, Mallee Bush-pea<br />
Ozothamnus retusus Notched Bush-everlasting<br />
Olearia decurrens<br />
Rhagodia parabolica Fragrant Saltbush, Mealy Saltbush<br />
Ground layer Aristida behriana Brush Wiregrass<br />
Arthropodium strictus Chocolate Lily<br />
Asperula conferta Common Woodruff<br />
Austrodanthonia caespitosa Ringed Wallaby-grass, Common Wallaby-grass<br />
Austrodanthonia setacea Small-flowered Wallaby-grass<br />
Austrostipa blackii Crested Spear-grass<br />
Austrostipa elegantissima Feather Spear-grass<br />
Austrostipa eremophila Rusty Spear-grass<br />
Austrostipa nitida Balcarra Spear-grass<br />
Austrostipa scabra Rough Spear-grass, Rough Needle-grass<br />
Calocephalus citreus Lemon Beauty-heads<br />
Cheilanthes austrotenuifolia Rock-fern<br />
Chrysocephalum apiculatum Yellow Buttons, Common Everlasting<br />
Convolvulus augustissimus<br />
Convolvulus remotus<br />
Australian Bindweed<br />
Crassula colorata Annual Stonecrop, Dense Crassula, Dense Stonecrop<br />
Crassula decumbens var. decumbens Spreading Crassula, Spreading Stonecrop<br />
Crassula sieberiana<br />
Cymbonotus preissianus<br />
Australian Stonecrop, Sieber Crassula<br />
Daucus glochidiatus Australian Carrot, Native Carrot<br />
4
Table 1. Characteristic flora <strong>of</strong> the <strong>Peppermint</strong> <strong>Box</strong> (<strong>Eucalyptus</strong> <strong>odorata</strong>) Grassy Woodland <strong>of</strong> South<br />
Australia ecological community, based on Hyde (1996) and Robertson (1998) continued<br />
Layer Species Common name(s)<br />
Dianella revoluta Blueberry Lily, Black-Anther Flax Lily<br />
Elymus scaber var. scabrus Native Wheat-grass, Common Wheat-grass<br />
Goodenia pinnatifida<br />
Goodenia pusilliflora<br />
Cut-leaf Goodenia<br />
Glycine rubignosa<br />
Lepidosperma viscidum<br />
Lomandra densiflora<br />
Twining Glycine<br />
Lomandra effusa<br />
Lomandra micrantha<br />
Scented Mat-rush; Iron-grass<br />
Lomandra multiflora ssp.dura Iron-grass<br />
Oxalis perennans Grass Wood-sorrel<br />
Maireana enchylaenoides Cotton-bush, Wingless fissure-weed, Wingdecs Bluebush<br />
Plantago varia Small Plantain, Sago-weed<br />
Ptilotus spathulatus Pussytails, Cat’s Paws<br />
Senecio quadridentatus Cotton Fireweed<br />
Sida corrugata<br />
Stackhousia spp.<br />
Corrugated Sida<br />
Vittadinia cuneata Fuzzweed<br />
Wahlenbergia luteola A Bluebell<br />
What is the Iron-grass natural temperate<br />
grassland <strong>of</strong> South Australia?<br />
The Iron-grass Natural Temperate Grassland <strong>of</strong> South<br />
Australia ecological community primarily occurs<br />
within the Flinders-L<strong>of</strong>ty Block Bioregion. The main<br />
extant patches lie in the area between Clare and<br />
Peterborough. However, patches extend into the<br />
Kanmantoo, Eyre–Yorke Block and Murray–Darling<br />
Depression Bioregions. Its general distribution is<br />
shown on the map on page 3.<br />
The ecological community generally occurs on gentle<br />
slopes <strong>of</strong> low hills above 380 metres above sea<br />
level. The soils on which it occurs are predominantly<br />
loams to clay-loams with an estimated clay content<br />
<strong>of</strong> 30–35 per cent. Surface pebbles are common at<br />
some sites and shale or sandstone rocky outcrops<br />
may also be present. The mean annual rainfall ranges<br />
from 280 to 600 millimetres per year.<br />
The structure <strong>of</strong> the vegetation is <strong>of</strong> a tussock<br />
grassland. Trees and tall shrubs are absent to<br />
sparse (cover less than 10 per cent) and tussock-<br />
5<br />
forming perennial grasses and Iron-grasses dominate<br />
the ground layer. A range <strong>of</strong> herbaceous plant<br />
species occurs in the inter-tussock spaces.<br />
Iron-grasses (Lomandra multiflora ssp. dura and<br />
Lomandra effusa) are the dominant and most<br />
characteristic feature <strong>of</strong> the vegetation. About<br />
10–70 per cent <strong>of</strong> the ground area is covered by<br />
Lomandra spp. Where the vegetative ground cover is<br />
minimal, Lomandra would still be expected to be one<br />
<strong>of</strong> the most common species. It must be noted that<br />
Lomandra may be absent in small areas (less than 1<br />
hectare) <strong>of</strong> the listed ecological community, however<br />
if these patches sit within the context <strong>of</strong> other areas<br />
containing Lomandra then these small patches are<br />
still considered to be part <strong>of</strong> the listed ecological<br />
community.<br />
Native plant species commonly recorded in<br />
Iron-grass Natural Temperate Grassland <strong>of</strong> South<br />
Australia ecological community is at Table 2.
Table 2. Common flora <strong>of</strong> the Iron-grass Natural Temperate Grassland <strong>of</strong> South Australia<br />
ecological community<br />
The plant list is based on surveys by Hyde (1995) and Robertson (1998) in the Flinders–L<strong>of</strong>ty Ranges<br />
and <strong>Department</strong> for Environment and Heritage (2001a) at Mokota Conservation Reserve<br />
Perennial native<br />
grasses<br />
Species Common name/s<br />
Aristida behriana* Brush Wiregrass<br />
Austrodanthonia auriculata Lobed Wallaby-grass<br />
Austrodanthonia caespitosa* Ringed Wallaby-grass, Common Wallaby-grass<br />
Austrodanthonia carphioides Short Wallaby-grass<br />
Austrostipa acrociliata Graceful Spear-grass<br />
Austrostipa blackii* Crested Spear-grass<br />
Austrostipa elegantissima Feather Spear-grass<br />
Austrostipa eremophila* Rusty Spear-grass<br />
Austrostipa nitida* Balcarra Spear-grass<br />
Austrostipa nodosa<br />
Austrostipa scabra Rough Spear-grass, Rough Needle-grass<br />
Enneapogon nigricans Black-head Grass<br />
Themeda triandra* Kangaroo Grass<br />
Grass-like plants Arthropodium strictus Chocolate Lily<br />
Bulbine bulbosa Bulbine Lily, Native Onion, Native Leek<br />
Dianella revoluta<br />
Lepidosperma viscidum<br />
Blueberry Lily, Black-Anther Flax Lily<br />
Lomandra effusa* Scented Mat-rush<br />
Lomandra multiflora ssp. dura* Many-flowered Mat-rush, Hard Mat-rush, Stiff Iron-grass<br />
Wurmbea dioica ssp. dioica Early Nancy<br />
Broad-leaved Asperula conferta Common Woodruff<br />
herbaceous species<br />
Brachyscome lineariloba Hard-headed Daisy<br />
* Indicates co-dominant species<br />
Calocephalus citreus Lemon Beauty-heads<br />
Chrysocephalum apiculatum Yellow Buttons, Common Everlasting<br />
Chrysocephalum semipapposum Clustered Everlasting, Yellow Buttons<br />
Convolvulus augustissimus Australian Bindweed<br />
Convolvulus remotus<br />
Crassula colorata Annual Stonecrop, Dense Crassula, Dense Stonecrop<br />
Crassula sieberana ssp. tetramera Australian Stonecrop, Sieber Crassula<br />
Eryngium ovinum/rostratum Blue Devil<br />
Euphorbia drummondii Caustic-weed, Red Soldier, Flat Spurge, Cuastic<br />
Creeper, Creeping Caustic, Mat-spurge, Milkweed<br />
Glycine rubignosa Twining Glycine<br />
Goodenia pinnatifida Cut-leaf Goodenia<br />
Goodenia pusilliflora<br />
Hyalosperma semisterile<br />
Isoetopsis graminifolia Grass Cushion<br />
Leptorhynchos squamatus Scaly Buttons<br />
Leptorhynchos tetrachaetus Little Buttons<br />
6
Table 2. Common flora <strong>of</strong> the Iron-grass Natural Temperate Grassland <strong>of</strong> South Australia ecological<br />
community continued<br />
Broad-leaved<br />
herbaceous species<br />
continued<br />
Species Common name/s<br />
Minuria leptophylla Minnie Daisy<br />
Oxalis perennans Grass Wood-sorrel<br />
Plantago varia Small Plantain, Sago-weed<br />
Podolepis tepperi<br />
Ptilotus spathulatus Pussytails, Cat’s Paws<br />
Rhodanthe pygmaea Pygmy Sunray<br />
Rumex dumosus Wiry Dock<br />
Sida corrugata. Corrugated Sida<br />
Stackhousia monogyna<br />
Swainsona behriana<br />
Creamy Candles, Creamy Stackhousia<br />
Thysanotus baueri<br />
Velleia arguta<br />
Mallee Fringe-lily<br />
Velleia paradoxa Spur Velleia<br />
Vittadinia cuneata<br />
Vittadinia gracilis<br />
Vittadinia megacephala<br />
Fuzzweed<br />
Wahlenbergia luteola A Bluebell<br />
Shrubs Bursaria spinosa Australian Blackthorn, Bursaria, Blackthorn, Native<br />
Blackthorn, Sweet Bursaria, Whitethorn, Christmas Bush<br />
Cryptandra amara ssp. longiflora Long-flower Cryptandra<br />
Enchylaena tomentosa Ruby Saltbush, Barrier Saltbush<br />
Maireana enchylaenoides Cotton-bush, Wingless Fissure-weed, Wingless<br />
Bluebush<br />
Maireana excavata Bottle Bluebush, Bottle Fissure-weed<br />
Pimelea micrantha<br />
Why were the <strong>Peppermint</strong> <strong>Box</strong> (<strong>Eucalyptus</strong><br />
<strong>odorata</strong>) Grassy Woodland <strong>of</strong> South Australia<br />
and Iron-grass Natural Temperate Grassland<br />
<strong>of</strong> South Australia listed as critically<br />
endangered?<br />
These ecological communities were listed as critically<br />
endangered under the Environment Protection<br />
and Biodiversity Conservation Act 1999 (the EPBC<br />
Act) because <strong>of</strong> a severe decline in distribution<br />
and ongoing loss <strong>of</strong> integrity. The decision by the<br />
Australian Minister for the Environment and Water<br />
Resources to list the communities followed careful<br />
consideration <strong>of</strong> advice from the Threatened Species<br />
Scientific Committee—an independent scientific<br />
body that advises the Minister on the conservation<br />
status <strong>of</strong> native species and ecological communities.<br />
7<br />
National listing <strong>of</strong> these ecological communities<br />
recognises that their long-term survival is under<br />
threat. The listing aims to prevent their further<br />
decline, and assist community and landholder efforts<br />
toward the recovery <strong>of</strong> these ecological communities.<br />
Both <strong>of</strong> these ecological communities have been<br />
heavily cleared and face similar threats across their<br />
range. In most <strong>of</strong> the areas that remain, grazing and<br />
pasture-improvement have effectively removed the<br />
characteristic native, perennial tussock grasses,<br />
herbs and shrubs, leaving many areas dominated<br />
by exotic weeds. Grazing has also prevented<br />
the regeneration <strong>of</strong> the overstorey species in the<br />
<strong>Peppermint</strong> <strong>Box</strong> Grassy Woodland <strong>of</strong> South Australia,<br />
to the extent that large areas <strong>of</strong> healthy, regenerating<br />
trees are rare.
Threats<br />
The key threats to the survival <strong>of</strong> both ecological<br />
communities include clearing, grazing and<br />
weed invasion. Other threats include road and<br />
rail maintenance activities and the effects <strong>of</strong><br />
fragmentation.<br />
Clearing for cropping and cultivated pasture<br />
eliminates native species, including any soil-stored<br />
seed, preventing their re-establishment without<br />
assistance.<br />
Grazing has reduced the diversity <strong>of</strong> the native<br />
species across most remaining sites <strong>of</strong> both<br />
ecological communities. As many grasses and forbs<br />
do not form persistent soil seed banks, once plants<br />
have been eliminated from the standing vegetation,<br />
they are unable to re-establish naturally, even if<br />
grazing pressure is removed.<br />
As well as direct impacts on individual plants, grazing<br />
can have indirect effects upon other native species<br />
through soil disturbance and physical changes to<br />
the soil such as compaction, nutrient enrichment,<br />
reduced water infiltration and erosion. These changes<br />
to the soil can facilitate and maintain weed invasion<br />
and make soil conditions unsuitable for native species<br />
regeneration.<br />
The degree <strong>of</strong> degradation <strong>of</strong> a patch varies with the<br />
grazing regime history. Constant grazing pressure<br />
throughout the year is more likely to eliminate grazing<br />
sensitive species than intermittent or seasonal<br />
stocking. This is why areas such as road sides which<br />
have only had intermittent grazing, <strong>of</strong>ten contain<br />
some <strong>of</strong> the best remnants.<br />
Calostemma purpurea (Garland lily): Iron-grass Natural Temperate<br />
Grassland <strong>of</strong> South Australia (Rosemary Purdie)<br />
8<br />
Austrostipa spp. (Speargrass) (John Vranjic)<br />
Weed invasion is a major threatening process for<br />
both ecological communities. Patches that have been<br />
heavily invaded by annual weeds such as Squirrel<br />
Tail Fescue and Rats Tail Fescue (Vulpia spp.) and<br />
Bearded Oats (Avena barbata) may still have a good<br />
cover <strong>of</strong> native species outside <strong>of</strong> spring. Annual<br />
weeds can be controlled through appropriate grazing<br />
and fire regimes. Perennial weeds such as Salvation<br />
Jane/Patterson’s Curse (Echium plantagineum)<br />
and Wild Sage (Salvia verbenaca) represent a more<br />
intractable problem.<br />
Persistent and intensive weed management using<br />
a variety <strong>of</strong> techniques is required to bring some<br />
weeds to a manageable threshold. Techniques<br />
include strategic mowing, slashing and clipping<br />
exotic grasses (to reduce their seed set and promote<br />
native regeneration) and the spot spraying or weed<br />
brushing <strong>of</strong> broadleaf weeds and perennial grasses<br />
with herbicide. Weeds growing in close proximity to<br />
native species should be removed by hand clipping.<br />
The aim in managing weeds is to reduce competition<br />
and assist natural regeneration and recovery <strong>of</strong> native<br />
plant communities.<br />
The Iron-grass Natural Temperate Grassland <strong>of</strong> South<br />
Australia is also threatened by inappropriate tree<br />
planting and agricultural snails.
Condition<br />
A condition class describes areas <strong>of</strong> an ecological<br />
community that have a similar conservation value.<br />
Condition can be determined by factors such as:<br />
numbers and types <strong>of</strong> native plants and animals<br />
present; the level <strong>of</strong> weed invasion; the size <strong>of</strong><br />
the area; and distance to the next area <strong>of</strong> native<br />
vegetation.<br />
Significantly degraded (low condition) areas are not<br />
part <strong>of</strong> a listed ecological community. This means<br />
that protection provisions <strong>of</strong> the EPBC Act are<br />
focused on the most valuable elements <strong>of</strong> Australia’s<br />
natural environment, while degraded areas, which do<br />
not trigger the ‘significance test’ <strong>of</strong> the EPBC Act,<br />
are largely excluded.<br />
9<br />
In order for an area to be included in either <strong>of</strong> the<br />
listed ecological communities, a patch must have a<br />
good diversity <strong>of</strong> native species and contain a good<br />
selection and cover <strong>of</strong> perennial native grasses. Table<br />
3 (below) outlines the two condition classes that are<br />
considered to be part <strong>of</strong> the listed <strong>Peppermint</strong> <strong>Box</strong><br />
(<strong>Eucalyptus</strong> <strong>odorata</strong>) Grassy Woodland <strong>of</strong> South<br />
Australia.<br />
Table 4 (page 10) outlines the two condition<br />
classes that are considered to be part <strong>of</strong> the listed<br />
Iron-grass Natural Temperate Grassland <strong>of</strong> South<br />
Australia. In both <strong>of</strong> these tables a third condition<br />
class is provided that describes areas considered<br />
to be suitable for rehabilitation but which are not<br />
considered part <strong>of</strong> the listed ecological communities.<br />
Table 3. Condition classes for the <strong>Peppermint</strong> <strong>Box</strong> (<strong>Eucalyptus</strong> <strong>odorata</strong>) Grassy Woodland<br />
<strong>of</strong> South Australia<br />
Classes A and B are indicative <strong>of</strong> the listed ecological community. Class C is indicative <strong>of</strong> patches that<br />
are degraded but could be rehabilitated to the listed ecological community. For a patch <strong>of</strong> vegetation<br />
to fall within a condition class it must meet or exceed each <strong>of</strong> the thresholds. For example, to meet<br />
condition class A a patch must be at least 0.1 ha in size and have more than 30 native species and at<br />
least 10 native broad-leaved herbaceous species not on the disturbance resistant list and have at least<br />
five native perennial grass species.<br />
No. <strong>of</strong> broad-leaved<br />
herbaceous species<br />
Condition class Minimum size<br />
1<br />
in addition to identified<br />
disturbance resistant species2 No. <strong>of</strong> native<br />
perennial<br />
grass species1 Diversity <strong>of</strong><br />
native plant<br />
Listed ecological community<br />
species<br />
A ≥ 0.1 ha > 30 ≥ 10 ≥ 5<br />
B ≥ 1 ha > 15 ≥ 3 ≥ 2<br />
Degraded patches amenable to rehabilitation<br />
C > 5 No minimum ≥ 1<br />
1<br />
Legend:<br />
Left to right:<br />
Austrostipa spp. (Speargrass),<br />
Minuria leptophylla (Minnie daisy),<br />
Lomandra multiflora ssp. dura (Iron-grass)<br />
(John Vranjic)<br />
1 As measured in a 50 m x 50 m quadrat (or equivalent).<br />
2 The following species are identifed as disturbance resistant species: Ptilotus spathulatus forma spathulatus; Sida corrugata;<br />
Oxalis perennans; Convolvulus augustissimus; Euphorbia drummondii; and Maireana enchylaenoides.
Table 4. Condition classes for the Iron-Grass Natural Temperate Grassland <strong>of</strong> South Australia<br />
Classes A and B are indicative <strong>of</strong> the listed ecological community. Class C is indicative <strong>of</strong> patches that are<br />
degraded but could be rehabilitated to become the listed ecological community. For a patch <strong>of</strong> vegetation<br />
to fall within a condition class it must meet or exceed the relevant threshold. For example to meet<br />
condition class A a patch must be at least 0.1 ha in size and have more than 30 native species and at<br />
least 10 native broad-leaved forb species not on the disturbance resistant list and have at least five native<br />
perennial grass species (excluding Lomandra) and have at least one native perennial tussock (including<br />
Lomandra) per linear metre.<br />
Diversity <strong>of</strong><br />
native plant<br />
Condition class Minimum size species1 No. <strong>of</strong> broad-leaved<br />
herbaceous species1 in addition to identified<br />
disturbance resistant species2 No. <strong>of</strong> native<br />
perennial<br />
grass species1 Tussock<br />
count3 Listed ecological community<br />
A ≥ 0.1 ha > 30 ≥ 10 ≥ 5 ≥ 1/m<br />
B ≥ 0.25 ha > 15 ≥ 3 ≥ 4 ≥ 1/m<br />
Degraded patches amenable to rehabilitation<br />
C > 5 No minimum ≥ 1 No<br />
minimum<br />
Legend:<br />
1 As measured in a 50 m x 50 m quadrat (or equivalent).<br />
2 The following species are identifed as disturbance resistant species: Ptilotus spathulatus forma spathulatus; Sida corrugata;<br />
Oxalis perennans; Convolvulus augustissimus ; Euphorbia drummondii; and Maireana enchylaenoides.<br />
3 As measured along a 50m transect.<br />
The Condition Class A and B outlined above for<br />
both ecological communities are the minimum<br />
level at which a patch is considered to be part<br />
<strong>of</strong> the listed ecological community. However, this<br />
does not represent the ideal state <strong>of</strong> the ecological<br />
community. The larger and more diverse a patch is,<br />
the more important it is. Additionally, patches that<br />
link remnants in the landscape, patches that occur<br />
in regions in which the ecological community is<br />
extremely uncommon, and patches that contain rare,<br />
declining or threatened species are important to the<br />
continuing viability <strong>of</strong> the ecological community into<br />
the future.<br />
How do I know if I have either <strong>of</strong> these<br />
ecological communities on my land?<br />
You can use the condition class information above<br />
and the following flowcharts (on pages 11 and 12)<br />
to determine whether or not you have either <strong>of</strong> the<br />
listed ecological communities on land you manage.<br />
10<br />
If the vegetation on your property was formerly<br />
<strong>Peppermint</strong> <strong>Box</strong> (<strong>Eucalyptus</strong> <strong>odorata</strong>) Grassy<br />
Woodland <strong>of</strong> South Australia or Iron-Grass Natural<br />
Temperate Grasslands <strong>of</strong> South Australia but no<br />
longer meets either <strong>of</strong> the definitions above, you may<br />
be able to work towards restoring this vegetation<br />
using the conservation actions outlined below.<br />
Areas that do not meet the condition criteria for<br />
inclusion in the listed ecological community, but<br />
should be given priority for regeneration include:<br />
large remnants; remnants containing mature trees,<br />
especially those with hollows; areas that link<br />
remnants in the landscape; remnants that occur in<br />
those areas in which the ecological community has<br />
been most heavily cleared and degraded; and those<br />
that contain rare, declining or threatened species.
Flowchart 1. <strong>Peppermint</strong> <strong>Box</strong> Grassy Woodland <strong>of</strong> South Australia<br />
Is the patch 0.1 ha in size or greater? NO<br />
YES<br />
Does the patch contain more than<br />
30 native plant species?<br />
YES<br />
Does the patch have at least 10 native<br />
broad-leaved herbaceous species that<br />
do not occur in the list below*?<br />
YES<br />
Does the patch have at least five<br />
perennial native grass species?<br />
YES<br />
NO Is the patch 1.0 ha in size or greater? NO<br />
NO<br />
NO<br />
The listed ecological community<br />
11<br />
YES<br />
Does the patch contain more than<br />
15 native plant species?<br />
YES<br />
Does the patch have at least three<br />
native broad-leaved herbaceous<br />
species that do not occur in the list<br />
below*?<br />
YES<br />
Does the patch have at least two<br />
perennial native grass species?<br />
* Ptilotus spathulatus forma spathulatus; Sida corrugata; Oxalis perennans; Convolvulus augustissimus;<br />
Euphorbia drummondii; and Maireana enchylaenoides.<br />
YES<br />
NO<br />
NO<br />
NO<br />
<strong>Eucalyptus</strong> <strong>odorata</strong> buds<br />
(Brooker & Kleinig © Australian National Botanic Gardens)<br />
Not the listed<br />
ecological<br />
community
Flowchart 2. Iron-grass Natural Temperate Grassland <strong>of</strong> South Australia<br />
Is the patch 0.1 ha in size or greater? NO<br />
YES<br />
Does the patch contain more than<br />
30 native plant species?<br />
YES<br />
Does the patch have at least 10 native<br />
broad-leaved herbaceous species that<br />
do not occur in the list below*?<br />
YES<br />
Does the patch have at least five<br />
perennial native grass species?<br />
YES<br />
Does the patch have at least one native<br />
perennial tussock per linear metre?<br />
YES<br />
NO Is the patch 0.25 ha in size or greater? NO<br />
NO<br />
NO<br />
NO<br />
The listed ecological community<br />
12<br />
YES<br />
Does the patch contain more than<br />
15 native plant species?<br />
YES<br />
Does the patch have at least three<br />
broad-leaved herbaceous species that<br />
do not occur in the list below*?<br />
YES<br />
Does the patch have at least four<br />
perennial native grass species?<br />
YES<br />
Does the patch have at least<br />
one native perennial tussock per<br />
linear metre?<br />
* Ptilotus spathulatus forma spathulatus; Sida corrugata; Oxalis perennans; Convolvulus augustissimus;<br />
Euphorbia drummondii; and Maireana enchylaenoides.<br />
YES<br />
NO<br />
NO<br />
NO<br />
NO<br />
Not the listed<br />
ecological<br />
community
What does the listing <strong>of</strong> these ecological<br />
communities mean for land managers?<br />
Protection under the EPBC Act applies to all<br />
components <strong>of</strong> the listed <strong>Peppermint</strong> <strong>Box</strong><br />
(<strong>Eucalyptus</strong> <strong>odorata</strong>) Grassy Woodland <strong>of</strong> South<br />
Australia and Iron-grass Natural Temperate<br />
Grassland <strong>of</strong> South Australia ecological communities.<br />
However, listing <strong>of</strong> these ecological communities<br />
under the EPBC Act will not prevent landholders<br />
from continuing to use their land in the same way<br />
they were before, providing they do not change or<br />
intensify their activities.<br />
National protection means any new or intensified<br />
activities that may be likely to have a significant<br />
impact upon either <strong>of</strong> the listed ecological<br />
communities should be referred to the Australian<br />
Minister for the Environment and Water Resources<br />
for assessment and approval (unless they are subject<br />
to an exemption under the EPBC Act). Activities<br />
that may have a significant impact include, but are<br />
not restricted to, clearing <strong>of</strong> remnants or supporting<br />
vegetation, grazing, introducing excessive nutrients<br />
to remnants and introducing potentially invasive<br />
pasture species into the proximity <strong>of</strong> remnants.<br />
The process for making a referral under the EPBC<br />
Act is easy and without charge. More information<br />
is available from the <strong>Department</strong>’s web site at<br />
www.environment.gov.au/epbc/index.html.<br />
Based on your referral, the Minister will determine<br />
if assessment and approval is required. If approval<br />
is not required, then you are free to take action<br />
in accordance with your referral. If approval is<br />
required, strict timeframes in the EPBC Act ensure<br />
the assessment and approval process is conducted<br />
in a timely manner.<br />
The EPBC Act allows for some exemptions to<br />
the requirement for assessment and approval.<br />
This means that some activities may not need<br />
an assessment or approval if you meet certain<br />
requirements. Information on exemptions is available<br />
online at: www.environment.gov.au/epbc/<br />
publications/exemptions.<br />
13<br />
What are the conservation priorities for the<br />
<strong>Peppermint</strong> <strong>Box</strong> (<strong>Eucalyptus</strong> <strong>odorata</strong>) Grassy<br />
Woodland <strong>of</strong> South Australia and Iron-grass<br />
Natural Temperate Grassland <strong>of</strong> South<br />
Australia?<br />
As part <strong>of</strong> its advice to the Minister, the Threatened<br />
Species Scientific Committee also provides<br />
recommendations on priority conservation actions<br />
that can assist in the recovery <strong>of</strong> these ecological<br />
communities.<br />
The priority actions identified for the <strong>Peppermint</strong><br />
<strong>Box</strong> (<strong>Eucalyptus</strong> <strong>odorata</strong>) Grassy Woodland <strong>of</strong> South<br />
Australia are:<br />
• protection <strong>of</strong> remnants <strong>of</strong> the listed ecological<br />
community through the development <strong>of</strong><br />
conservation agreements and covenants<br />
• control <strong>of</strong> existing weeds in remnants, particularly<br />
Squirrel Tail and Rats Tail Fescue (Vulpia spp.),<br />
Bearded Oats (Avena barbata) and Salvation Jane/<br />
Patterson’s Curse (Echium plantagineum)<br />
• exclusion <strong>of</strong> continuous grazing from remnants<br />
• use <strong>of</strong> strategic grazing (incorporating rest at<br />
appropriate times) in areas with larger numbers<br />
<strong>of</strong> native species<br />
• protection <strong>of</strong> remnants from new weeds by<br />
preventing soil disturbance in and around<br />
remnants, and the speedy eradication <strong>of</strong> any<br />
new invasions and<br />
• expansion and connection <strong>of</strong> existing remnants.<br />
The priority actions identified for the Iron-grass<br />
Natural Temperate Grassland <strong>of</strong> South Australia are:<br />
• protection <strong>of</strong> remnants <strong>of</strong> the listed ecological<br />
community through the development <strong>of</strong><br />
conservation agreements and covenants<br />
• exclusion <strong>of</strong> continuous grazing from remnants,<br />
coupled with weed management and control and<br />
use <strong>of</strong> strategic grazing (incorporating rest at<br />
appropriate times)<br />
• protection <strong>of</strong> remnants from weeds by preventing<br />
soil disturbance in and around remnants, and the<br />
speedy eradication <strong>of</strong> any new invasions and<br />
• expansion and connection <strong>of</strong> existing remnants.<br />
These lists do not encompass all actions that may<br />
be <strong>of</strong> benefit to these ecological communities, but<br />
highlights those that are considered to be <strong>of</strong> the<br />
highest priority at the time <strong>of</strong> listing.
Restoration and management <strong>of</strong> temperate grasslands in South Australia:<br />
Efforts <strong>of</strong> the Threatened Plant Action Group<br />
Since 1994, the Threatened Plant Action Group<br />
(TPAG) has been working to protect and restore<br />
remnants <strong>of</strong> temperate grasslands in the mid-north<br />
<strong>of</strong> South Australia. TPAG have initiated work at<br />
three sites containing important grassland habitat.<br />
The work undertaken on these sites includes<br />
intensive weed management with up to 12 site<br />
visits annually. The techniques used include:<br />
strategic mowing, slashing and clipping <strong>of</strong> exotic<br />
grasses (to reduce their seed set and promote<br />
native regeneration), spot spraying or weed<br />
brushing broadleaf weeds and perennial grasses<br />
with herbicide. Weeds growing in close proximity<br />
to native species are removed by hand clipping.<br />
Before the TPAG began working on the sites not<br />
many people had given them much thought as<br />
they were small and in poor condition. Weeds,<br />
including exotic annual and perennial grasses<br />
(eg Wild Oats, Phalaris and Tall Wheat-grass)<br />
and broadleaf plants (eg Salvation Jane, thistles,<br />
Scabious and Wild Sage), dominated the sites and<br />
few native species were abundant.<br />
After many years <strong>of</strong> hard work, native species<br />
diversity and abundance has increased<br />
substantially with lilies, daisies, other herbs,<br />
grasses and sedges appearing or increasing at<br />
the sites. Although some weed species are still<br />
present, they fill much less <strong>of</strong> the available space.<br />
Some native shrubs, herbs and grasses (grown<br />
from locally collected seed) have also been<br />
planted at the sites, locally collected seeds have<br />
been scattered in slashed areas and rubbish has<br />
also been removed. Fencing has been erected at<br />
some sites to preclude harmful land use activities.<br />
These actions aim to aid the in-situ recovery <strong>of</strong><br />
threatened grassland species and are guided by<br />
a recovery team.<br />
TPAG’s work has been supported by: the local<br />
community; Northern Areas Council; Clare<br />
and Gilbert Valley Council; South Australian<br />
<strong>Department</strong> for Transport, Energy and<br />
14<br />
Infrastructure; Australian Southern Rail; and the<br />
South Australian <strong>Department</strong> for Environment<br />
and Heritage.<br />
The Australian Government, South Australian<br />
<strong>Department</strong> <strong>of</strong> Transport, Energy and Infrastructure<br />
and the Northern and Yorke Natural Resource<br />
Management Group have provided funding for<br />
a range <strong>of</strong> recovery actions.<br />
For more information, or to get involved in<br />
threatened plant recovery in South Australia<br />
contact the Threatened Plant Action Group:<br />
Tel: 08 8232 4088<br />
Email: tpag@ncssa.asn.au.<br />
Funding is available for projects to recover<br />
threatened species and ecological communities.<br />
This includes work on rehabilitating areas<br />
that were formerly part <strong>of</strong> a listed ecological<br />
community, but are now degraded.<br />
• For information about the Threatened Species<br />
Network Community grants visit:<br />
www.wwf.org.au/tsn<br />
• For information about Envir<strong>of</strong>und grants visit:<br />
www.nht.gov.au/envir<strong>of</strong>und<br />
You may also wish to participate in the<br />
development and implementation <strong>of</strong> your region’s<br />
Natural Resource Management Plan. In this case,<br />
contact your local land management agency.<br />
<strong>Peppermint</strong> <strong>Box</strong> (<strong>Eucalyptus</strong> <strong>odorata</strong>) Grassy Woodland<br />
(Peter Komidar)
Where can I go for further information?<br />
The Threatened Plant Action Group <strong>of</strong> the Nature Conservation Society <strong>of</strong> South<br />
Australia can provide information on the management <strong>of</strong> land containing both<br />
the <strong>Peppermint</strong> <strong>Box</strong> (<strong>Eucalyptus</strong> <strong>odorata</strong>) Grassy Woodland <strong>of</strong> South Australia<br />
and Iron-grass Natural Temperate Grassland <strong>of</strong> South Australia:<br />
Tel: 08 8223 6301<br />
Email: tpag@ncssa.asn.au<br />
Useful web sites<br />
• EPBC Act web site: www.environment.gov.au/epbc<br />
• EPBC Act Administrative Guidelines on Significance:<br />
www.environment.gov.au/epbc/assessmentsapprovals/guidelines/<br />
index.html<br />
• Referral form: www.environment.gov.au/epbc/assessmentsapprovals/<br />
referrals/form.html<br />
Further information is also available from the <strong>Department</strong> <strong>of</strong> the Environment<br />
and Water Resources Community Information Unit:<br />
Email: ciu@environment.gov.au<br />
Freecall: 1800 803 772<br />
15<br />
Top to bottom:<br />
E. <strong>odorata</strong> (Brooker & Kleinig<br />
© Australian National Botanic<br />
Gardens), Austrostipa spp.<br />
(Speargrass) (John Vranjic),<br />
female pygmy blue-tongue<br />
lizard (Peter Robertson),<br />
grassland flowers (John Vranjic)<br />
Printed June 2007
Cover images (clockwise from left): E. <strong>odorata</strong> (Brooker & Kleinig © Australian National Botanic Gardens), female pygmy blue-tongue lizard (Mark Hutchinson),<br />
Austrostipa spp. (Speargrass) (John Vranjic), Minuria leptophylla (Minnie daisy) (John Vranjic)<br />
ENVIRONMENT PROTECTION AND BIODIVERSITY CONSERVATION ACT