Comaum NFRs - ForestrySA

More documents

Recommendations

Info

11 dune ranges were eroded and younger dunes deposited on them; two sequences remain on the East Naracoorte range and four have been recognised on the West Naracoorte range. The dune limestone exposed on the higher points in Wombat Flat NFR is likely to be from mid-Pleistocene dune remnants. Geologically, most of the soil cover is derived from leached siliceous sands of the Malanganee Formation. In Victoria these have been classified as Kowree sand or Richmond sand. Rendzina swamp soils occur where calcarenite forms the base of depressions. Minor occurrences of terra rossa soils derived from calcarenite dune limestone are present in the eastern part of Wombat Flat NFR. Comaum NFR and Boolara NFR are situated on the West Naracoorte Range system, deposited close to the margin of the downthrown side of the Kanawinka Fault which indicates the oldest Pleistocene deposits are around 685 000 years old. Both reserves have a core structure of calcarenite dune limestone, with a general elevation of 70-75 and high points up to 90m. Soils have been formed mainly from aeolian siliceous dune sands. Relatively small areas of terra rossa are present on dune crests. Comaum NFR is located on the eastern boundary of an area displaying karst features including runaway holes (dolines and cenotes). Boolara NFR is in a region denoted as lacking karst features although still traversed by the West Naracoorte range, rather than direct contact with Mt Gambier limestone to the north and west. (Boardman, R 1999). 2.2.3 Soils Soil surveys prior to purchasing Comaum and Boolara NFRs described six soil types. Swamp Soil has been formed in an enclosed sandy depression in Compartment A Wombat Flat NFR. This soil is shallow over limestone, dark grey to black with a high organic content. Surface water has not been observed in this swamp for over 20 years, the last record of short term flooding being in the late 1950s. Meadow Podsol, a shallow dark grey or brown surface sand with abundant coarse pink grains, over clay, occurs on flats subject to seasonal waterlogging in normal rainfall years. Humus Podsol, described as shallow brown sands over clay occurs on flats which may be subject to seasonal water logging or inundation. Normal Podsol, (a) described as yellow sands with varying depth to clay according to their elevation on the dune have developed on sites with good drainage. (b) described as deep grey sands on the dune crests and upper slopes. Terra rossa, loams and loamy sand transitionals derived from exposed or shallow calcarenite limestone are limited in extent on some dune crests and upper slopes. The dune sands on these Reserves have a larger grain size contributing to a more loose surface than the sands further south. Sand track access during most of the year is difficult due to the dry unconsolidated nature of the sand. 2.2.4 Hydrology Final Plan – August 2001
12 Average rainfall for these Reserves is estimated to be within the range 600 – 650 mm per annum (see Section 2.1 Climate). There are no permanent swamps, surface streams or active drains in these Reserves. Rainfall is absorbed through the soil to the water-table which varies from 1 to 30 metres or more depending on the season and dune surface elevation. Some minor drains were constructed through the northern part of Comaum NFR to remove water from pine plantations being established adjacent to that Reserve in 1967 and 1968. The dry swamp in Cpt A Wombat flat NFR was noted on the original survey drawing of 1883 as being dry at that time. 2.3 Petroleum and Mining Resources The south-east of South Australia and western Victoria is a proven petroleum province referred to as the Otway Basin. There are numerous small natural gas and carbon dioxide fields in production or in development, both onshore and offshore. There are also several oil shows/discoveries in exploration wells, some of which may be commercially viable and be developed. Petroleum Exploration Licence ( PEL ) 62 exists over a major part of The Comaum Native Forest Reserves. ( See Appendix III. ) This tenement provides rights to explore for petroleum beneath the Reserves and adjacent lands. The PEL also permits the licensee to apply for Petroleum Production Licences in the case of resource discovery. ( M. Bayly, pers.comm. ) This plan recognises the potential for petroleum and mineral resources to be present and recoverable beneath these Native Forest Reserves. 2.3.1 Petroleum Act 2000 and Mining Act 1971 These Acts regulate all activities relating to exploration and production. In regard to flora and fauna, there are requirements to avoid, or where not reasonably practicable, minimise environmental impacts. In this regard, impacts to native vegetation are permitted without requirement of consent under the Native Vegetation Act 1991. 2.4 Biological Environment 2.4.1 Vegetation Brown stringybark dominates these Reserves occurring on a range of sites from deep sand dune crests and slopes to sand flats. South Australian blue gum, Pink gum, Manna gum, Swamp gum and River red gum are restricted to smaller areas with more fertile soils and greater soil water availability. The under storey may consist of a few species dominated by bracken on the deep infertile sands, or be a diverse mix of many heath species on the better sandy flats. The following vegetation associations have been identified and their more common constituent species listed. Final Plan – August 2001
Page 1: Final Plan - August 2001 Document C
Page 4 and 5: 3.3 Current Uses 3.3.1 Conservation
Page 6 and 7: 6 These Reserves provide suitable h
Page 14 and 15: 1.1.4 Administration The Native For
Page 16 and 17: 9 3. (2) A proclamation declaring a
Page 20 and 21: 13 Eucalyptus baxteri (Brown string
Page 22 and 23: Mammals 15 Ten native mammal specie
Page 24 and 25: 3.2.3 Wildfire 17 According to Coma
Page 32 and 33: 19 The Comaum Native Forest Reserve
Page 34 and 35: Final Plan - August 2001 21 SOUTH E
Page 36 and 37: 23 High Ongoing which may affect th
Page 38 and 39: 25 2000 Med Remove introduced plan
Page 40 and 41: TABLE 1 27 PLANT SPECIES RECORDED F
Page 42 and 43: Crassula seiberiana ssp. tetramera
Page 44 and 45: Lavatera plebeia Australian holly h
Page 46 and 47: Stylidium graminifolium plant Grass
Page 48 and 49: TABLE 2 35 Bird Species Recorded fo
Page 50 and 51: 37 BIRD GROUPS STATUS (B) Predomina
Page 52 and 53: 39 BIRD GROUPS STATUS Richard’s P
Page 54 and 55: TABLE 3 41 MAMMAL SPECIES RECORDED
Page 56 and 57: 7. APPENDICES APPENDIX I FORESTRYSA
Page 58: REFERENCES Boardman, R (1999) Unpub

Comaum NFRs - ForestrySA

Create successful ePaper yourself

Delete template?

Save as template?