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Remnant vegetation survey : Darwin to Palmerston region : a report to Greening Australia N.T.



Remnant vegetation survey : Darwin to Palmerston region : a report to Greening Australia N.T.


Brock, John 1951-


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Made available via the Publications (Legal Deposit) Act 2004 (NT).; Remnant vegetation is defined as an area of land which contains native vegetation in a natural state. Much remnant vegetation has been lost or seriously degraded as a result of urban expansion, clearing and development. Poor land management practices have also contributed to long term deterioration of native bushland. Factors causing negative impact include uncontrolled fires, weed intrusion, stormwater runoff, unformed tracks with subsequent erosion, and indiscriminate dumping of household and industrial waste. The main aim of this survey was to identify, describe and map areas of native remnant vegetation and to both determine and graphically represent their significance.




Vegetation surveys -- Northern Territory -- Darwin Region; Plants -- Northern Territory -- Darwin Region; Vegetation, Remnant

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Greening Australia?

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Darwin (N.T.)


43 leaves ; 30 cm.

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, . tracing paper, with reference to existing vegetation and land resource maps. Final interpretation and boundaries of mapping units were modified according to ground truthing and data collection . 2.2 Survey Field work involved the collection of data at sites within the survey area. Sites were located to sample representative areas within the major mapping units identified in the interpretation. At each site all plant species and an assessment of the vegetation structure were recorded. Upper storey (tree) heights were estimated using a clinometer. Upper storey. crown covers and inid and lower storey foliage cover were- viSua!Iy estimated. Variation within and around unit boundaries was checked. Variables were collected and rated to evaluate the status and condition of remnant vegetation. The environmental condition of the site was assessed. Intensity and form of disturbance was recorded, including impacts from fire or cyclone, degradation from erosion or clearing, and presence and abundance of'weed species. The site and adjacent bushland was assessed as habitat and pathway for native fauna, in conjunction with regional vegetation corridors. Regeneration of woody. species was scored. The site's potential as an educe!tional or recreational resource was assessed subjectiveIy. Evidence of fauna was noted, as. well as features such as water, views or rocky outcrops. A colour photo was taken of each site. . .^. J Field work was largely undertaken during the wet seasons (JanApr) of 1994 and 1995, with further visits depending on accessibility and sampling intensity. Access to sites was by 4WD vehicle or on foot. 130 20m x 20m sites were sampled. General vegetation structure, habitat variation, locally common species and environmental condition were noted along all tracks. , 2.3 Vegetation classification and mapping units Plant identification took place in the field and at the Northern Territory Herbarium. Taxonomy follows Dunlop, Leach and Latz (, 995). Floristic groupings described are based upon the recurrence of recognisable. species assemblages. Overall structure and life form classes are provided along with an estimate of the abundance of characteristic species. Mapping units were described by examination of the site data. Vegetation community classification follows. the scheme used by Wilson at a1(1990), whereby, in general, each community has a consistent 6