Irenepharsus trypherus (Illawarra Irene) Recovery Plan

NSW Department of Environment and Conservation, 2005
ISBN: 1 7412 2145 5

Appendix 1: Site details

NB Specific location details are not included in the following site descriptions. Public authorities, land managers or others with a legitimate reason for requiring this information, may request it by contacting the Irenepharsus trypherus Recovery Plan Coordinator on (02) 9585 6678.

Site Code: IR1

Location: North Marshall Mount
LGA: Wollongong
Mapsheet: Robertson 9028-4-N
Tenure: Freehold
Zoning: 7(b)

Landuse:
Cattle grazing. A Property Agreement has been negotiated between the landholder and the DIPNR under the Native Vegetation Conservation Act 1997. Livestock have been temporarily removed from the property until the fencing of remnant vegetation and the installation of watering points have been completed. Areas of remnant vegetation on the property have been previously grazed by cattle and selectively logged.

Aspect: SE
Altitude: 160 m
Geology: Minnamurra Latite

Habitat Description:
Backhousia myrtifolia low closed forest associated with exposed rock outcrops on upper hill-slope. Other small tree species present include Cassine australis, Notelaea venosa and Rapanea variabilis. Sparse understorey consists of Pomaderris aspera, Citriobatus pauciflorus, Hymenanthera dentata, Adiantum aethiopicum, Dichondra repens, Doodia aspera, Pseuderanthemum variabile, Plectranthus parviflorus, Desmodium varians, Cayratia clematidea and Eustrephus latifolius.

Weed density is low (Delairea odorata (Cape Ivy) and Lantana camara (Lantana). Adjacent slopes contain Eucalyptus quadrangulata (Coast White Box) - Eucalyptus muelleriana (Yellow Stringybark) with a mesic understorey dominated by Croton verreauxii and Notelaea venosa.

Status:
Uncertain. Not located during 2001 and 2002 surveys. First discovered in 1998 when two plants were located. Last observed in 1999 when 35 plants were present.

Area of Occupancy:
Not recorded.

Threats:
Grazing and trampling by feral and/or native animals appears to be the only threat at this site. Feral deer are present on the property while the presence of feral goats is unconfirmed.

Site Code: IR2

Location: Macquarie Pass NP
LGA: Shellharbour
Mapsheet: Robertson 9028-4-N
Portion/Lot: DP3331 Pt8
Owner/Access: NPWS Highlands Area
Tenure: National Park
Zoning: 8(e)
Landuse: Conservation
Aspect: SE Altitude: 160 m
Geology: Budgong Sandstone

Habitat description:
Steep gully slope within 30 metres, and on both sides, of creek. Backhousia myrtifolia low closed forest and subtropical rainforest with emergent Eucalyptus quadrangulata. Other species present include Cassine australis, Alectryon subcinereus, Notelaea venosa, Breynia oblongifolia, Wilkiea huegeliana, Diospyros australis, Streblus brunonianus, Hymenanthera dentata, Pittosporum multiflorum, Cayratia clematidea, Adiantum aethiopicum and Urtica incisa.

Weed density is highly variable (0 to 80% cover) and composed predominantly of Delairea odorata (Cape Ivy), Lantana camara (Lantana) and Ageratina riparia (Mistflower).

Status:
Extant. 480 plants recorded in January 2004 (M. Robinson, pers. comm.). First discovered in 1993 when one plant was recorded. No plants recorded during 1998, 2001 or 2002 surveys.

Area of Occupancy:
1500 square metres

Threats:

  • Slope erosion and tramping by bushwalkers (confirmed)
  • Weed invasion (confirmed)
  • Grazing and trampling by feral deer (possibly goats) and native animals (potential threat)

Site Code: IR3

Location: Johnstons Ridge
LGA: Shellharbour
Mapsheet: Robertson 9028-4-N
Tenure: Freehold
Zoning: 7(e)
Landuse: Cattle grazing
Altitude: 190 m
Geology: Budgong Sandstone

Habitat Description:
Backhousia myrtifolia low closed forest associated with exposed rock outcrops on the upper gully slope. Other species in vicinity include Notelaea venosa, Rapanea variabilis, Plectranthus parviflorus, Poa labillardieri, Microlaena stipoides and Asplenium flabellifolium.

Weed density varies greatly within the habitat (0 to 70% cover) and consists predominantly of Lantana Lantana camara and Cape Ivy Delairea odorata.

Status:
Uncertain. Not located during 2002 survey. Possibly grazed by feral goats, which were observed by the landholder three months prior to the survey. First discovered in early 1990s although the number of plants present was not recorded.

Area of occupancy:
Not recorded.

Threats:

  • Weed invasion (confirmed)
  • Grazing and trampling by feral (goats and deer) and native animals (confirmed)
  • Grazing and trampling by cattle is a threat in the thin strip of remnant vegetation above the ridge (potential)

Site Code: IR4

Location: Stockyard Mountain
LGA: Shellharbour
Mapsheet: Robertson 9028-4-N
Tenure: Freehold
Zoning: 1(a)
Landuse: Cattle grazing
Altitude: 290 m
Geology: Cambewarra Latite

Habitat Description:
Described in the Atlas of NSW Wildlife as occupying a cliff edge exposed to full sun in subtropical rainforest. Associated species listed as Cassine australis, Nysanthes sp., Plectranthus parviflorus, Aphanopetalum resinosum and Delairea odorata. The area is mapped at ecotone of Eucalyptus quadrangulata (Coast White Box) - Eucalyptus muelleriana (Yellow Stringybark) Tall Forest and Complex Subtropical Rainforest in Mills (2000).

Status:
Uncertain. Access denied during 2002 and 2003 surveys. Last observed in 1992 when only two plants were recorded.

Area of occupancy:
Not recorded.

Threats:

  • Weed invasion (Delairea odorata Cape Ivy and Lantana camara Lantana) was the main threat in 1992
  • Grazing/trampling by feral and/or native animals (potential)
  • Grazing/trampling by livestock (potential)

Site Code: IR5

Location: Stockyard Mountain
LGA: Shellharbour
Mapsheet: Robertson 9028-4-N
Tenure: Freehold
Zoning: 1(a)

Landuse:
Cattle grazing. Dense Lantana and steep slopes prevent livestock accessing I. trypherus habitat from below. Boundary fencing prevents livestock accessing the site from above.

Aspect: WSW
Altitude: 240 m
Geology: Budgong Sandstone

Habitat Description:
Site occupies an area approximately 30 m by 40 m immediately above and below the rock outcrops associated with the upper gully slopes. Site contains 30% unconsolidated and 40% outcropping rock. Vegetation is Eucalyptus quadrangulata (Coast White Box) - Eucalyptus tereticornis (Forest Red Gum) with an understorey dominated by dry subtropical rainforest aligned species including Rapanea variabilis, Cassine australis, Clerodendrum tomentosum, Acacia binervata and Claoxylon australe.

Weeds (Delairea odorata Cape Ivy, Lantana camara Lantana) are present in low densities (I. trypherus plants but occur in high densities (50-70% cover) in adjacent areas.

The area is mapped at ecotone of Eucalyptus quadrangulata (Coast White Box) - Eucalyptus muelleriana (Yellow Stringybark) Tall Forest and Complex Subtropical Rainforest in Mills (2000).

Status:
Extant. 16 plants recorded during 2002 survey. First observed in 1992 when 16 plants were present.

Area of Occupancy:
1200 square metres

Threats:

  • Weed invasion (confirmed)
  • Grazing and trampling by feral and/or native animals (potential)
  • Grazing and trampling by livestock is a potential threat if boundary fencing is not maintained

Site Code: IR6

Location: Stockyard Mountain
LGA: Shellharbour
Mapsheet: Robertson 9028-4-N
Tenure: Freehold
Zoning: 1(a)
Landuse: Remant vegetation on a cattle grazing property
Altitude: 230 m
Geology: Cambewarra Latite

Habitat Description:
Two sub-sites described in the Atlas of NSW Wildlife as occurring near a vehicular track on a ridge slope. Sub- site 6a is recorded occupying open to disturbed forest with Eucalyptus longifolia, Clerodendrum tomentosum, Adiantum aethiopicum, Breynia oblongifolia and Oplismenus viscidula. Sub-site 6b is recorded occupying open forest with Acacia maidenii, Indigofera australis, Allocasuarina littoralis, Sigesbeckia orientalis, Oplismenus viscidula and Sida rhombifolia. Both sites are mapped as Blackbutt (Eucalyptus pilularis) Tall Forest in Mills (2000).

Ageratina riparia (Mistflower), Lantana camara (Lantana) and Delairea odorata (Cape Ivy) are reported to be present at both sub-sites.

Status:
Uncertain. Access denied during 2001 and 2002 surveys. Last recorded in 1993 when 15 plants were present at sub-site 6a and 10 to 15 plants were present at sub-site 6b.

Area of Occupancy:
Not recorded

Threats:

  • Weed invasion (confirmed)
  • Grazing/trampling by feral animals (potential)
  • Grazing/trampling by livestock (potential)

Site Code: IR7

Location: Stockyard Mountain
LGA: Shellharbour
Mapsheet: Robertson 9028-4-N
Tenure: Freehold
Zoning: 1(a)

Landuse:
Cattle grazing. Dense Lantana and steep slopes prevent livestock accessing the site from below. Boundary fencing prevents livestock accessing the site from above.

Aspect: WSW
Altitude: 280 m
Geology: Budgong Sandstone

Habitat Description:
Site occurs on the steep upper slopes of a NW-SE spur. Plants are scattered over an area approximately 150 m across the slope and 20 m down. Site contains 30% unconsolidated and 20% outcropping rock. Vegetation is Eucalyptus quadrangulata - Eucalyptus muelleriana open forest with understorey dominated by dry subtropical rainforest aligned species. Weed density varies from 5 to 50% cover, predominantly Lantana camara (Lantana) although low levels of Delairea odorata (Cape Ivy) (

Status:
Extant. 44 plants recorded in 2002. First located in 2001 when 67 plants were present. Decline in numbers probably due to the dry summer experienced in 2002.

Area of Occupancy:
3000 square metres

Threats:

  • Weed invasion (confirmed)
  • Grazing/trampling by feral animals (potential)
  • Grazing/trampling by livestock is a potential threat if boundary fencing is not maintained

Site Code: IR8

Location: Stockyard Mountain
LGA: Shellharbour
Mapsheet: Robertson 9028-4-N
Tenure: Freehold
Zoning: 1(a)
Landuse: Cattle grazing
Altitude: 150 m
Geology: Cambewarra Latite

Habitat Description:
Described in the Atlas of NSW Wildlife as occupying the slope below a cliff line near a vehicular track. Associated vegetation described as sclerophyll open forest with a (nearly closed) mesic understorey. Species listed are Eucalyptus quadrangulata, Lantana camara, Cryptocarya microneura, Citronella moorei, Sigesbeckia orientalis and Abutilon oxycarpum.

Status:
Unknown. Last observed in 1993 when only one plant was present. Cattle reportedly introduced into the area since that time.

Area of Occupancy:
Not recorded

Threats:

  • Grazing/trampling by livestock (potential)
  • Grazing/trampling by feral animals (potential)
  • Weed invasion (potential)

Site Code: IR9

Location: Stockyard Mountain
LGA: Shellharbour
Mapsheet: Robertson 9028-4-N
Tenure: Freehold
Zoning: 1(a)

Landuse:
Cattle grazing. Dense lantana and steep slopes prevent livestock accessing I. trypherus habitat from below. Access to site from above by livestock may be possible.

Aspect: W
Altitude: 250 m
Geology: Cambewarra Latite

Habitat Description:
Site occurs on the steep upper slopes of a N-S spur. Plants are scattered over an area approximately 50m across the slope and 20m down. Site contains 30% unconsolidated and 10% outcropping rock. Vegetation is Eucalyptus quadrangulata- Eucalyptus muelleriana open forest with an understorey dominated by dry subtropical rainforest aligned species. Weed density varies from 5 to 50% cover, predominantly Lantana camara (Lantana) although low levels of Delairea odorata (Cape Ivy) (

Status:
Extant. 84 plants present in 2001, access denied in 2002. First observed in 1993 when only two plants were present.

Area of Occupancy:
2000 square metres

Threats:

  • Weed invasion (confirmed)
  • Grazing/trampling by feral animals (potential)
  • Grazing/trampling by livestock is a potential threat if livestock can access site from above

Site Code: IR10

Location: Minnamurra Rainforest North
LGA: Kiama
Mapsheet: Kangaroo Valley 9028-4-S
Owner/Access: NPWS Highlands Area
Tenure: National Park
Zoning: 8(a)
Landuse: Conservation
Aspect: E
Altitude: 265 m
Geology: Cambewarra Latite

Habitat Description:
Growing out of cliff face in small pockets of accumulated organic matter. Vegetation on cliff consists of stunted Pittosporum undulatum, Ficus coronata and Lantana camara with Ageratina riparia, Phymatosorus scandens, Piper novae-hollandiae and Asplenium australasicum. Vegetation on slope below is subtropical rainforest containing Dendrocnide excelsa, Doryphora sassafras, Diospyros australis, Baloghia inophylla and Pennantia cunninghamii..

Weed density on the cliff face varies from 0 to 40% cover, predominantly Lantana Lantana camara with lower density of Mistflower Ageratina riparia.

Status:
Extant. 2 plants discovered in 2002.

Area of Occupancy:
4 square metres

Threats:

  • Weed invasion (confirmed)

Site Code: IR11

Location: Minnamurra Rainforest South
LGA: Kiama
Mapsheet: Kangaroo Valley 9028-4-S
Owner/Access: NPWS Highlands Area
Tenure: National Park
Zoning: 8(a)
Landuse: Conservation
Aspect: N to WNW
Altitude: 260 to 310 m
Geology: Illawarra Coal Measures (sub-sites a-d) Cambewarra Latite (sub-site e)

Habitat Description:
Four sub-sites (a-d) scattered over an area approximately 170 m by 50 m. Located on steep slopes above the cliff lines on the southern side of Minnamurra River Valley. Amount of unconsolidated and outcropping rock material present varies from 0 to 80% cover between sub-sites.

Eucalyptus tereticornis open forest to woodland in association with Eucalyptus eugenioides, Eucalyptus fastigata and Eucalyptus quadrangulata. Disturbed understorey composed of dry rainforest aligned species including Cassine australis, Diospyros australis, Clerodendrum tomentosum, Alphitonia excelsa and Streblus brunonianus.

Weed density at locations containing I. trypherus varies from 0 to 30% cover, predominantly Lantana Lantana camara with lower density (Delairea odorata. Adjacent areas contain dense Lantana (60 to 100% cover) and pose a threat to this site.

One sub-site (e) located below the cliff face growing in Backhousia myrtifolia dominated low open forest on the slopes above an ephemeral creekline.

Status:
Extant. Originally one plant recorded from sub-site (e) in 1995. A total of 137 plants (comprising 90 mature plants) recorded at the site between December 2003 and May 2004.

Area of Occupancy:
900 square metres

Threats:

  • Weed invasion (confirmed)
  • Grazing/trampling by native animals (potential)

Site Code: IR12

Location: Kangaroo Valley
LGA: Shoalhaven
Mapsheet: Kangaroo Valley 9028-4-S
Owner/Access: NPWS Highlands Area
Tenure: National Park
Zoning: 8(a) (sub-sites a, b and c), 7(e) (sub-site d)
Landuse: Conservation
Aspect: E and SE
Altitude: 310 to 400 m
Geology: Budgong Sandstone

Habitat Description:
Four sub-sites associated with a cliff line on the southern side of the Kangaroo River. Sub-sites occur along the plateau edge immediately above the cliff, on narrow benches along the cliff line and on the steep rocky slopes at the northern end of the cliff line. Total area covered by site is approximately 320 m across slope and 70 m down slope. Amount of unconsolidated and outcropping rock material present varies from 20 to 80% between sub- sites.
Vegetation present at sub-site (d) on the edge of plateau and sub-sites (a) and (b) on the benches of the cliff line was Backhousia myrtifolia scrub to closed scrub. Occasional emergent Eucalyptus piperita were present on some benches. Other species present included Notelaea ovata, Bursaria spinosa, Hymenanthera dentata and Acacia maidenii. Vegetation present at sub-site (c) at northern end of cliff-line was Eucalyptus piperita - Eucalyptus saligna/botryoides with an open understorey containing Acacia maidenii, Synoum glandulosum, Indigophera australis and Macrozamia communis. Weeds (exotic annuals including Mistflower Ageratina riparia, Fleabane Conyza sp., Catsear Hypochaeris radicata) are present in low densities (generally

Status:
Extant. 332 plants located in 2002. Originally 11 plants recorded in 1998.

Area of Occupancy:
1000 square metres

Threats:
Grazing by goats (potential)

Site Code: IR13

Location:Ettrema Gorge
LGA: Shoalhaven
Mapsheet: Touga
Owner/Access: NPWS Nowra Area
Tenure: National Park
Landuse: Conservation
Altitude: 330m
Geology: Silurian Sandstone

Habitat Description:
Described in atlas record as occupying a rocky slope above Ettrema Creek at its intersection with Jones Creek. Associated vegetation is Backhousia myrtifolia scrub.

Status:
Unknown. No plants located in 2002. Discovered in 1984 although number of plants present was not recorded.

Threats:
None observed