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

GERALDTON

 

REGIONAL



225

Plate A8.15.1:   Photo direction: SE 

 

 

Location: GRV0810, White Peak 



Photographer: L. Atkins

Plate A8.15.1:   Photo direction: SE 

 

 

Location: GRV0840, Oakajee 



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

GERALDTON

 

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  

 

 

(Aa/At/Hp)



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

GERALDTON

 

REGIONAL



229

Plate A8.16.1:   Photo direction: SE 

 

 

Location: GRV0811, Oakajee 



Photographer: L. Atkins

Plate A8.16.2:  Photo direction: SE 

 

 

Location: GRV0823, Oakajee 



Photographer: L. Atkins

Plate A8.16.3:  Photo direction: SE 

 

 

Location: GRV0844, Howatharra 



Photographer: L. Atkins

Plate A8.16.4:  Photo direction: SE 

 

 

Location: 267057 E, 6836910 N, 



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:  

Open Woodland

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

GERALDTON

 

REGIONAL



231

Plate A8.17.1:   Photo direction: SE 

 

 

Location: GRV0842, Oakajee 



Photographer: L. Atkins

Plate A8.17.2:   Photo direction: E 

 

 

Location: 269624 E, 6838905 N, 



Oakajee 

 

 



Photographer: J. Nelson


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