Appendix eight: grfvs plant communities
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| Appendix eight: GRFVS plant communities MARCH 2010 224 Flora and Vegetation Survey GERALDTON
REGIONAL The thicket plant community occurs on the footslopes and isolated mesas to the west of the Moresby Range, and includes the steep slopes of the Oakajee and Buller Rivers to the east of the North-West Coastal Highway. It is often dominated by one of a number of Melaleuca species, including M. megacephala, M. concreta, M. coronicarpa and Melaleuca fulgens subsp. steedmanii, but is usually a mixed thicket consisting of many species. Area in GRFVS: % of GRFVS area: Quadrats: GRV0810, 25, 39, 40, 41, 53, 55, 63 469.57 ha 7.61
(8) NVIS description: Sparse Shrubland, Sparse Vineland, Open Heathland, Open Sedgeland, Open Shrubland, Shrubland, Forbland, Closed Shrubland Keighery description: Open Shrubland, Tall Open Scrub, Shrubland, Tall Shrubland, Closed Low Heath Muir description: Open Low Scrub B, Low Scrub B, Low Scrub A, Scrub, Thicket, Dense Low Heath D The following common species were recorded: Tall shrubs: Acacia tetragonophylla, Grevillea pinaster, Melaleuca megacephala Mid shrubs: Acacia congesta, Acacia neurophylla, Allocasuarina campestris, A species of conservation significance, Melaleuca concreta, Melaleuca fulgens subsp. steedmanii, Petrophile seminuda Low shrubs: Astroloma serratifolium, Calytrix depressa, Cryptandra arbutiflora var. borealis, Melaleuca coronicarpa, Melaleuca radula, Verticordia chrysantha Climbers: Clematicissus angustissima, Comesperma integerrimum, Dioscorea hastifolia, Thysanotus manglesianus Sedges and rushes: Desmocladus asper, Lepidosperma spP1 Small Head, Schoenus latitans Grasses: Amphipogon caricinus, Austrostipa elegantissima, *Avena barbata, Neurachne alopecuroidea Herbs:
*Arctotheca calendula, Borya sphaerocephala, Caesia micrantha, Dichopogon capillipes, *Hypochaeris glabra, Lawrencella rosea, Podolepis lessonii, Rhodanthe spicata, Waitzia acuminata Landform: Gentle or steep, slope or hilltop Geology: Mostly on the Northampton soil system, however there are some areas where the Moresby soil system occurs within the GRFVS area. This plant community occurs on the following soil subsystems: • Northampton 1 Dissected granulite Phase soil subsystem: 225No_1GrD, dissected country dominated by granulite parent material. Geology: granulites dominate with dolerite dykes and remnants of some Jurassic sediments in areas. • Northampton 1 Rolling granulite Phase soil subsystem: 225No_1GrR, gently rolling terrain. Red shallow loam with deep and shallow red duplex soils, occasionally alkaline, pale deep sand and yellow/brown duplexes. Geology: granulites dominate with dolerite dykes and remnants of some Jurassic sediments in areas. 15. Thicket: Melaleuca spp. / mixed spp. (Mspp/mx)
Appendix eight: GRFVS plant communities MARCH 2010 Flora and Vegetation Survey
REGIONAL 225 Plate A8.15.1: Photo direction: SE
Photographer: L. Atkins Plate A8.15.1: Photo direction: SE
Photographer: L. Atkins Geology: (cont.) • Northampton 1 sandstone rises Phase soil subsystem: 225No_1GrS, steep to very steep sandstone mesas and peaks generally less than 40 m within the granulite country. Shallow sands and gravels. Geology: remnants of Jurassic sediments over granulites • Moresby 2 rock outcrop Phase soil subsystem: 225Mo_2R, rock outcrops on the Moresby footslopes. Bare rock. Geology: recent colluvium Surface rock: 2-25% sandstone, weathered granite or ironstone, 2-40 cm fragments Soil:
Brown sand, grey sandy loam, brown clayey sand, yellow grey loamy sand, orange or red brown sandy clay, brown orange sandy clay loam % Cover leaf litter: 1-30
% Cover bare ground: 5-95
% Weed cover: 0-20
Notes: Where grazing has occurred, the more palatable species have been removed and Acacia tetragonophylla, Hakea preissii and other hard leaved or prickly species remain, and plant density is less. When only the unpalatable species remain, this community becomes plant community 16 Woodland Acacia acuminata / Acacia tetragonophylla / Hakea preissii. Appendix eight: GRFVS plant communities MARCH 2010 226 Flora and Vegetation Survey GERALDTON
REGIONAL Plate A8.15.3: Photo direction: SE
Location: GRV0853, White Peak Photographer: L. Atkins Plate A8.15.4: Photo direction: SE
Location: GRV0855, White Peak Photographer: L. Atkins Plate A8.15.5: Photo direction: SE
Location: GRV0863, Waggrakine Photographer: L. Atkins Plate A8.15.6: Photo direction: S
Location: 268723 E, 6834756 N, Buller River
Photographer: J. Nelson Appendix eight: GRFVS plant communities MARCH 2010 Flora and Vegetation Survey
REGIONAL 227 The Acacia acuminata / A. tetragonophylla / Hakea preissii woodlands and shrublands are restricted to the loamy soils of the Northampton soil system. This plant community is dominated by tree and tall shrub species, climbers, grasses and herbs, with few low or mid-shrubs. Floristically it is most similar to plant community 15 Thicket: Melaleuca spp. / mixed spp. and plant community 17 Woodland: Eucalyptus loxophleba, from which it is separated by vegetation structure and dominant species. Occasional Eucalyptus loxophleba trees may occur within this community, illustrated in Plate A8.16.4. In some areas that would previously have supported plant community 15 Thicket: Melaleuca spp. / mixed spp., grazing has reduced the vegetation to unpalatable species including Acacia tetragonophylla and Hakea preissii, which are characteristic of this plant community. In the upper reaches of the Buller and Oakajee Rivers, this plant community occupies areas that, in the riparian zone further downstream, would be plant community 2 Riparian: Eucalyptus camaldulensis / Casuarina obesa / Melaleuca rhaphiophylla. Area in GRFVS: % of GRFVS area: Quadrats: GRV0811, 23, 44 452.11 ha 7.33 (3)
NVIS description: Open Woodland, Woodland Keighery description: Low Open Woodland, Low Woodland Muir description: Open Low Woodland B, Low Woodland B The following common species were recorded: Trees:
Acacia acuminata, Hakea preissii Tall shrubs: Acacia daphnifolia, Acacia tetragonophylla Mid shrubs: Pimelea microcephala subsp. microcephala Low shrubs: Banksia fraseri var. ashbyi Climbers: Clematicissus angustissima, Dioscorea hastifolia, Thysanotus manglesianus Sedges and rushes: Schoenus clandestinus Grasses:
Austrostipa elegantissima, Austrostipa scabra, *Avena barbata, *Vulpia myuros Herbs:
Borya sphaerocephala, Caesia micrantha, *Cuscuta planiflora, Erodium cygnorum, Hypoxis glabella, Podolepis lessonii, Rhodanthe spicata, Velleia cycnopotamica Landform: Gentle slope Geology: Northampton soil system, in the subsystems listed below: • Northampton 1 Dissected Granulite Phase soil subsystem: 225No_1GrD, dissected country dominated by granulite parent material. Geology: granulites dominate with dolerite dykes and remnants of some Jurassic sediments in areas. 16. Woodland: Acacia acuminata / A. tetragonophylla / Hakea preissii
Appendix eight: GRFVS plant communities MARCH 2010 228 Flora and Vegetation Survey GERALDTON
REGIONAL Geology: (cont.)
• Northampton 1 Rolling granulite Phase soil subsystem: 225No_1GrR, gently rolling terrain. Red shallow loam with deep and shallow red duplex soils, occasionally alkaline, pale deep sand and yellow/brown duplexes. Geology: granulites dominate with dolerite dykes and remnants of some Jurassic sediments in areas. Surface rock: 0-10% sandstone or dolerite, fragments to 30 cm Soil:
Red brown, brown or orange yellow sandy loam or sandy clay % Cover leaf litter: 2-50 % Cover bare ground: 15-50 % Weed cover: 10-70 Notes:
One of the floristic quadrats determined to be in this plant community, and used to form the description (GRV0823) is mapped as occurring on the Tamala soil system, in deep yellow sand. The soil at the quadrat location does not map this description, and, as the mapped boundary is only approximately 20 m from the quadrat location, it is assumed the boundary is inaccurate and the quadrat is located in the nearby Northampton soil system. Appendix eight: GRFVS plant communities MARCH 2010 Flora and Vegetation Survey
REGIONAL 229 Plate A8.16.1: Photo direction: SE
Photographer: L. Atkins Plate A8.16.2: Photo direction: SE
Photographer: L. Atkins Plate A8.16.3: Photo direction: SE
Photographer: L. Atkins Plate A8.16.4: Photo direction: SE
Oakajee
Photographer: J. Nelson Appendix eight: GRFVS plant communities MARCH 2010 230 Flora and Vegetation Survey GERALDTON
REGIONAL The Eucalyptus loxophleba woodland plant community is separated from the Acacia acuminata / A. tetragonophylla / Hakea preissii woodland plant community by dominant species and lifeform, but occurs on the same soil system. Occasionally it occurs on soil-filled pockets on rocky slopes that are otherwise plant community 15 Thicket: Melaleuca spp. / mixed spp. Area in GRFVS: % of GRFVS area: Quadrats: GRV0842
17.06 ha 0.28
(1) NVIS description: Keighery description: Low Open Woodland Muir description: Open Low Woodland A The following common species were recorded: Trees: Eucalyptus loxophleba subsp. loxophleba, Hakea preissii Tall shrubs: Acacia tetragonophylla, Pittosporum angustifolium Mid shrubs: Daviesia divaricata, Olearia dampieri, Pimelea microcephala subsp. microcephala, Scaevola spinescens Low shrubs: Acacia ulicina, Enchylaena tomentosa, Rhagodia latifolia subsp. recta Climbers: Aphanopetalum clematideum Grasses:
Austrostipa elegantissima, *Avena barbata, Neurachne alopecuroidea Herbs:
Dianella revoluta, Ptilotus exaltatus Landform: Flat hilltop Geology:
Northampton 1 Rolling granulite Phase soil subsystem: 225No_1GrR, gently rolling terrain. Red shallow loam with deep and shallow red duplex soils, occasionally alkaline, pale deep sand and yellow/brown duplexes. Geology: granulites dominate with dolerite dykes and remnants of some Jurassic sediments in areas. Surface rock: None Soil:
Red brown sandy loam % Cover leaf litter: 0-25 % Cover bare ground: 45 % Weed cover: <1 Notes:
Although this plant community is restricted to a small area within the GRFVS area, a similar community is common outside it. Most Eucalyptus loxophleba woodlands within agricultural areas, including in the GRFVS area, are degraded, and are grazed and often weedy. Relatively undisturbed areas within the agricultural zone are uncommon. 17. Woodland: Eucalyptus loxophleba (El) Appendix eight: GRFVS plant communities MARCH 2010 Flora and Vegetation Survey
REGIONAL 231 Plate A8.17.1: Photo direction: SE
Photographer: L. Atkins Plate A8.17.2: Photo direction: E
Oakajee
Photographer: J. Nelson Kataloq: dop pub pdf dop pub pdf -> Appendix eight: grfvs plant communities dop pub pdf -> Urban design and landscape strategy report Yüklə 7,92 Mb. Dostları ilə paylaş:
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