The land resources of Cobourg Peninsula
by B. Wood and D. Sivertsen
Wood, B.; Sivertsen, D.; Conservation Commission of the Northern Territory
E-Publications; E-Books; PublicationNT
Made available via the Publications (Legal Deposit) Act 2004 (NT).; This report describes a land system survey over the Cobourg Peninsula broadly describing landform, soils and vegetation to assist the effective planning and management of the area as a National Park.
1. Introduction -- 2. Summary Descriptions -- 3. Land Systems -- 4. Soils -- 5. Vegetation -- Appendices -- Acknowledgements.
Land use -- Northern Territory -- Cobourg Peninsula; Vegetation mapping -- Northern Territory -- Cobourg Peninsula
Conservation Commission of the Northern Territory
iv, 80,  p. : col. ills. ; 30 cm.
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Ii s 5- '( I ings being further subdivided on the basis of species composition. Some further subdivisions were made on the basis of floristic or structural variations in the lower strata. This la~ter type of sub division, i.e. based on variations in the substoreys, was used rarely in thi s proj ect since such var iation was difficult to detect on the aerial photography and satellite imagery. The following accounts of the communities are descriptive sum maries providing i~formation on general structure, dominant and char acteristic species, the associated osoil and landform types, commu~ity variability and con,servation value. Communities are dealt with, as far as is possible, in their stratigraphic sequence beginning with the eucalypt dominated forests of the plateau surface and proceed ing to the mangrove forests and mudflats of the intertidal zone. More detailed community descriptions appear in Appendix III. 5.3.1 Communities of the Plateau Surface I /-;:, Eucalyptus miniata - Eucalyptus tetrodonta - Eucalyptus neso hila woodlands and open forests (Map Unit 1 741.5 km 2)< enerally a Tall Woodland, the community also conta ins zones. where the <' crown. cover increases enough to form Tall Open Forest. A sparse to mid-dense sec ondary tree layer is usually present and is composed of small er spec imens of those spec ies occurring in the . ~~ upper stratum ,as well as Er ythrophl oiJm chI orostachys, \ ,,/' Livistona humu7is and Gronophyl7um ramsayi. This latter species often characterises the community al though it is conspicuously abse,~t where bauxitic or deep Quaternary substrates occ ur. . T,he shrub stratum, forming a sparse to v,ery sparse layer, is characterised by Livistona humilis, Choriceras tricorne and several Acacia species; a tota,l of twenty (20) different shrub spec ies were recorded. Grasses tend to form a m id dense to dense ground cover, particularly \::Jhere there were sign ificant breaks in the upper canopy. The most frequentl y occurr ing grasses are Eri achne tri seta_, Heteropogon triticeus and Pseudopogonatherum contortum. This community is typically found on moderately deep to deep red and yellow earths formed on laterized - 31
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