Review of Australia’s Major Vegetation Classification ces, unsw


Table 6: Key to Major Vegetation Subgroups in MVG6: Acacia Forests and Woodlands (NVIS Version 4.1)



Yüklə 1.85 Mb.
səhifə5/7
tarix24.08.2017
ölçüsü1.85 Mb.
növüReview
1   2   3   4   5   6   7



Table 6: Key to Major Vegetation Subgroups in MVG6: Acacia Forests and Woodlands (NVIS Version 4.1)


Key No.

Criteria

MVS# or Next Key No.

Broader groupings or MVS Name

Comments

0

  • Overstorey dominated by Acacia harpophylla (brigalow), Casuarina cristata, Acacia cambagei (gidgee) or Acacia georginae. Shrubs sparse or absent, ground layer usually with a sparse cover of tussock grasses of tribes Chlorideae and Sporoboleae. Occurs on clay-textured alkaline soils in depressions or clay plains.




  • Overstorey not dominated by species listed above. Groundcover with tussock grasses mostly from Aristideae and Andropogoneae. Occurs typically on coarse-textured acid soils.




1

2








1

  • Overstorey dominated by Acacia harpophylla and/or Casuarina cristata. Often on basalt plains in regions receiving 500 – 750 mm mean annual rainfall.




  • Overstorey not dominated by Acacia harpophylla and/or Casuarina cristata. Most commonly dominated by Acacia cambagei, Acacia georginae or Acacia argyrodendron. Often in landscape depressions, including gilgais and dune swales, in regions receiving 200 – 500 mm mean annual rainfall.




MVS13

MVS##


Brigalow forests and woodlands

Gidgee woodlands



NSW, QLD

NSW, QLD, SA, NT (also represented in MVG 13)




2

  • Overstorey dominated by Acacia aneura sens. lat. (Mulga). Understorey is dominated by tussock grasses, forbs or multiple growth forms. Hummock grasses occasionally present. Generally on extensive stony plains with light textured loams and clay subsoils in regions receiving 200 – 500 mm mean annual rainfall.




  • Overstorey NOT dominated by Acacia aneura sens. lat. (Mulga). Most commonly dominated by Acacia shirleyi, Acacia catenulata or Acacia petraea. Canopy or subcanopy may include other small trees or shrubs (e.g. Petalostigma, Erythropleum and Macropteranthes). Understorey is includes hummock grasses. On stony uplands and sandstone plateaus mostly in regions receiving 500 – 750 mm mean annual rainfall.




MVS20

MVS14


Stony mulga woodlands and shrublands

Upland tropical Acacia Woodlands



NSW, QLD, NT, SA, WA

(also represented in MVGs 13 and 16, which account for occurrences in SA and WA, while MVG 6 is essentially confined to QLD and NSW)


QLD, NT




Table 7: Key to Major Vegetation Subgroups in MVG7: Callitris Forests and Woodlands (NVIS Version 4.1)


Key No.

Criteria

MVS# or Next Key No.

Broader groupings or MVS Name

Comments

0

  • Dominated by species of Callitris

MVS12

Callitris forests and woodlands

Currently includes communities that are naturally dominated by Callitris and other genera at sites apparently unsuitable for eucalypts and some Callitris communities derived from eucalypt forests and woodlands subject to prior logging or overgrazing. The latter are common in southeast Australia and typically include scattered eucalypts as part of the assemblage.



Table 8: Key to Major Vegetation Subgroups in MVG8: Casuarina Forests and Woodlands (NVIS Version 4.1)


Key No.

Criteria

MVS# or Next Key No.

Broader groupings or MVS Name

Comments

0

  • Woodland dominated by Casuarina pauper, sometimes hybridising with C. cristata where their ranges overlap. Other tree species may be locally abundant including Alectryon oleifolius, Myoporum platycarpum, Callitris glauca, Callitris murrayana or Allocasuarina luehmannii. Occurs on calcareous sandplains in semi-arid climates receiving mean annual rainfall of 220-350 mm.




  • None of the species listed above are present. Climate not semi-arid.




MVS26

1


Calcareous sandplain woodlands

NSW, VIC, SA
Woodlands with Casuarina cristata are associated with Brigalow forests and woodlands and assigned to MVG 6.
Vegetation dominated by Allocasuarina verticillata occurs in SA and TAS. These form tall scrubs and are assigned to MVG 15.

1




  • Forest or woodland dominated by Casuarina glauca, sometimes with Melaleuca species, on coastal floodplains and estuarine wetlands with subsaline soils.




MVS##
MVS##

River oak forests
Eastern floodplain/estuarine forests

ACT, NSW, QLD
NSW, QLD


Table 9: Key to Major Vegetation Subgroups in MVG9: Melaleuca Forests and Woodlands (NVIS Version 4.1)


Key No.

Criteria

MVS# or Next Key No.

Broader groupings or MVS Name

Comments

0

  • Woodland or open woodland, typically up to 10 m tall and dominated by Melaleuca viridiflora, M. citrolens or M. stenostachya, often interspersed with eucalypts mostly of genus Corymbia. Understorey with a largely continuous ground layer of tussock grasses. Occurs on alluvial sandplains inundated for short periods (up to several weeks) during the wet season.




  • Forest or woodland, up to 20 m tall and dominated by Melaleuca species other than those listed above, although Melaleuca viridiflora may be present. Understorey with a range of aquatic and floating aquatic plants. Occurs on floodplain depressions, sandplain depressions and riparian corridors.




MVS15

1



Tropical sandplain woodlands


WA, NT, QLD, NSW

Taller Melaleuca forests and woodlands associated with more regular or more prolonged inundation



1

  • Riparian woodlands dominated by Melaleuca argentea, Melaleuca fluviatilis and/or Melaleuca leucadendra, sometimes with Casuarina cunninghamiana. Occurs along riparian corridors of tropical streams.




  • Wetland forests and woodlands, sometimes with Melaleuca leucadendra, but none of the other taxa listed above. Not associated with streams, but may be inundated with standing water for varying periods.




MVS ##
2

Tropical riparian forests

WA, NT, QLD, NSW






  • Distribution exclusively tropical, extending from western Cape York to the Kimberley region of WA on floodplains. Dominated by tropical paperbarks including Melaleuca leucodendra, M. cajuputi, M. saligna, , M. viridiflora or M. clarksonii and Asteromyrtus symphyocarpa. Except in northern and eastern coastal areas of Cape York, Melaleuca quinquenervia is absent.




  • Distribution extending from the east coast of Cape York south to the Sydney region, largely non-tropical and associated with coastal sandplains. Dominated by Melaleuca quinquenervia, often with Eucalyptus robusta, E. resinifera, E. tereticornis or Lophostemon suaveolens




MVS##

MVS##


Tropical floodplain forests

Sandplain wetland forests and woodlands



NT, QLD, possibly WA

QLD, NSW



Table 10: Key to Major Vegetation Subgroups in MVG10: Other Forests and Woodlands (NVIS Version 4.1)


Key No.

Criteria

MVS# or Next Key No.

Broader groupings or MVS Name

Comments

0

  • Overstorey dominated by Banksia sp. Trees. Essentially restricted to the Swan Coastal Plain in southwest WA.




  • Overstorey not dominated by Banksia trees (although Banksia trees or shrubs may still be present)

MVS50
1

Banksia woodlands





1

  • Overstorey dominated by Leptospermum sp. Trees. Primarily coastal areas in southeast Australia.




  • Overstorey not dominated by Leptospermum trees (although Leptospermum trees or shrubs may still be present)

MVS58

2


Leptospermum forests and woodlands




2

  • Distributed in savanna landscapes north of the Tropic of Capricorn. Ground layer largely continuous and dominated by C4 grasses. Multiple tree species dominate within stands at site scales. Typical dominant genera include: Adansonia, Alectryon, Archidensdropsis, Asteromyrtus, Brachychiton, Cochlospermum, Erythrophleum, Excoecaria, Grevillea, Livistona, Lysiphyllum, Macropteranthes, Neofabricia, Notelaea, Pandanus, Terminalia, Thryptomene (shrub).




  • Distributed primarily south of the Tropic of Capricorn. Ground layer not usually dominated by C4 grasses ,although they may be present. Stands typically dominated by a single tree species at site scales, but multiple tree species may dominate south of the Tropic of Capricorn.




MVS11

MVS16


Tropical mixed species forests and woodlands

Other forests and woodlands


Dominant Syncarpia, Tristaniopsis, or Lophostemon sometimes misplaced here. Re-assign the Syncarpia dominated communities under the appropriate eucalypt MVG.




Table 11: Key to Major Vegetation Subgroups in MVG11: Eucalypt Open Woodlands (NVIS Version 4.1)


Key No.

Criteria

MVS# or Next Key No.

Broader groupings or MVS Name

Comments

0

  • Hummock grasses scarce or absent. Woodland overstorey dominated by Eucalyptus species within section Adnataria (box and coolibah eucalypts) within subgenus Symphyomyrtus or by Eucalyptus camaldulensus. Occurs on depositional plains and stony peneplains.




  • Hummock grasses present and usually abundant. Overstorey dominated by eucalypt taxa other than those listed above, usually from Corymbia (ghost gums, desert bloodwoods) or Eucalyptus subgenus Eudesmia or section Exsertaria within subgenus Symphyomyrtus (notably snappy gums, Eucalyptus leucophloia and Eucalyptus brevifolia). Occurs in dry tropical and arid landscapes, usually on rocky uplands and residual landforms, also on outwash zones and areas with local moisture.




1

MVS18


Desert eucalypt woodlands

QLD, NSW, NT, WA, SA

1

  • Understorey is dominated by chenopods (shrubs and forbs), and/or lignum (Duma florulenta) and/or tussock grasses or sedges. Non-chenopod shrubs scarce, except Acacia species may be present as small trees or tall shrubs. Overstorey includes a range of ‘coolibah’ eucalypts (E. coolabah, E. microtheca, E, barklyensis, etc), E. camaldulensis, E. largiflorens or E. populnea. Occurs on clay soils on depositional plains.




  • Understorey dominated by open layer of non-chenopod shrubs, including species of Dodonaea, Eremophila and Senna. Chenopod shrubs and lignum absent, tussock grasses sparse and mostly ephemeral. Eucalyptus populnea may dominant, but other eucalypts listed above are absent. Occurs on loamy upland peneplains and hills, rarely depositional landforms.




MVS65

MVS8




Semi-arid floodplain and wadi woodlands

Semi-arid upland woodlands




NSW, VIC, QLD, NT, SA, WA (also represented in MVG 5).

NSW, QLD, NT, SA, WA (also represented in MVG 5)




Table 12: Key to Major Vegetation Subgroups in MVG12: Tropical Eucalypt Woodlands/Grasslands (NVIS Version 4.1)


Key No.

Criteria

MVS# or Next Key No.

Broader groupings or MVS Name

Comments




  • Dominated by an open canopy of eucalypts, including Corymbia and Eucalyptus subgenera Fibridia and Leprolaena, and a range of tropical non-eucalypt genera. Understorey is dominated by a prominent cover of C4, tussock grasses including tall annuals.

MVS7

Tropical Eucalyptus forests and woodlands with an annual tussock grass understorey

Potential subgroups differentiating lowland savanna eucalypt woodlands from rocky upland savannah eucalypt woodlands warrant further investigation. The latter includes hummock grasses (Triodia species) and more conspicuous sclerophyll shrub component with species of (Calytrix, Jacksonia, Acacia and Grevillea, lower abundance of mesic shrubs and palms, and less continuous layer of C4 tussock grasses.


Table 13: Key to Major Vegetation Subgroups in MVG13: Acacia Open Woodlands (NVIS Version 4.1)


Key No.

Criteria

MVS# or Next Key No.

Broader groupings or MVS Name

Comments

0

  • Overstorey dominants include Acacia pendula, Acacia loderi or Acacia papyrocarpa. Hummock grasses rarely present.




  • Overstorey not dominated by any of the taxa listed above. Hummock grasses sometimes present.




1

2





Myall woodlands of eastern and southern Australia

Acacia woodlands of subtropical and warm temperate Australia



1

  • Overstorey dominated by Acacia pendula. Understorey includes chenopod shrubs and forbs and tussock grasses. Found on grey clay plains where mean annual rainfall ranges from 375 mm to 550 mm.




  • Overstorey dominated by Acacia loderi or Acacia papyrocarpa Acacia. Understorey dominated mostly by non-chenopod shrubs and tussock grasses




MVS22
MVS24

Semi-arid myall woodlands
Arid myall woodlands


NSW, QLD
NSW, SA, WA

2

  • Overstorey most commonly dominated by Acacia cambagei, Acacia georginae or Acacia argyrodendron. Other woody plants are uncommon but may include Alectryon, Atriplex, Carissa, Enchylaena, Eremophila, Senna and Terminalia. Typically on fine-textured soils in landscape depressions, including gilgais and dune swales.




  • Overstorey not dominated by any of the taxa listed above. Most common dominants include Acacia aneura and its allies. Typically on light-textured loams and sands on extensive plains and dunefields.




MVS##

3



Gidgee woodlands



NSW, QLD, SA, NT (also represented in MVG 6)

Mulga woodlands



3

  • Occurs on stony plains and uplands. Primary dominant is Acacia aneura sens. lat., with co-occurring woody species less abundant and usually shorter in stature. Other widespread Acacia species include A. grasbyi, A. estrophiolata A. victoriae, A. tetragonophylla, A. quadrimarginea, and A. xiphophylla. Understorey cover is variable, usually dominated by tussock grasses. Hummock grasses may be present but not often dominant.




  • Occurs on sand plains. Overstorey dominated by Acacia, often with two or more species co-occurring. Acacia aneura sens. lat., may be present but not often as the primary dominant. Other widespread Acacia species include A. calcicola, A. ligulata, A. murrayana, A. ramulosa and A. tetragonophylla. Understorey usually dominated by hummock grasses, particularly Triodia basedowii.




MVS20

MVS23


Stony mulga woodlands and shrublands

Sandplain Acacia woodlands and shrublands



NSW, QLD, NT, SA, WA (also represented in MVGs 6 and 16)

NSW, QLD, NT, SA, WA (also represented in MVG 16)




Table 14: Key to Major Vegetation Subgroups in MVG14: Mallee Woodlands and Shrublands (NVIS Version 4.1)


Key No.

Criteria

MVS# or Next Key No.

Broader groupings or MVS Name

Comments

0

  • Dominant or subordinate species of any stratum includes at least one species endemic to Western Australia (e.g. tree stratum includes Eucalyptus eremophila, E. moderata, E. incrassata, E. foecunda, E. redunca or E. uncinata). Distributed west of the Nullarbor Plain in Western Australia




  • No Western Australian endemics recorded as dominants or subordinates of any stratum.




MVS ##
1

Western mallee

WA (also represented in MVG 32)

1

  • Understorey dominated by shrubs other than those in family Chenopodiaceae (Maireana, Rhagodia, Chenopodium, Atriplex, Sclerolaena), typically >1 m tall at maturity. Triodia, if present, not dominant.




  • Understorey dominated by grasses and/or shrubs or forbs in the family Chenopodiaceae (Maireana, Rhagodia, Chenopodium, Atriplex, Sclerolaena) OR dominated by multiple growth forms including non-chenopod shrubs and Triodia.



2

3








2

  • Callitris verrucosa present in any stratum and/or understorey shrub stratum including sclerophyll (heath) genera Aotus, Baeckea, Brachyloma, Hibbertia, Leptospermum or Phebalium, at maturity typically attaining crown cover > 50% (i.e. FPC > 30%; NVIS cover_codes=d, c). Distributed on white sands in the southern mallee regions of Victoria and SA where mean annual rainfall exceeds 300 mm.




  • Callitris verrocosa absent from all strata and understorey shrub stratum including non-sclerophyll genera such as Alectryon, Dodonaea, Eremophila, Myoporum or Senna, often with Acacia and Grevillea, at maturity typically with crown cover <20% (FPC<10%; NVIS cover_code=r), though sometimes denser. Occurs most commonly in swales and flat expanses of red sandplains (more rarely on white sands) in northwest Victoria, SA and NSW where mean annual rainfall is less than 350 mm.




MVS29

MVS55


Heathy Mallee

Shrubby Mallee



SA, VIC (also represented in MVG 32)

NSW, SA, VIC (also represented in MVG 32)



3

  • Understorey dominated by chenopod shrubs (genera Maireana, Rhagodia, Enchylaena, Chenopodium, Atriplex, Sclerolaena) or tussock grasses. Hummock grasses (Triodia spp.) and Callitris verrucosa absent. Occurs on red heavy-textured sands over a shallow calcrete subsoil in NSW, Vic and SA.




  • Understorey dominated by hummock grasses (Triodia spp.), may include scattered Callitris and mostly shrubs. Chenopods may be present but not dominant. Occurs on deep dune summits and slopes on red or white sandplains in NSW, Victoria and SA.

MVS61

MVS27


Chenopod Mallee

Triodia Mallee



NSW, SA, VIC (also represented in MVG 32)

NSW, SA, VIC (also represented in MVG 32)







Поделитесь с Вашими друзьями:
1   2   3   4   5   6   7


Verilənlər bazası müəlliflik hüququ ilə müdafiə olunur ©azkurs.org 2019
rəhbərliyinə müraciət

    Ana səhifə