Guidelines and Field Methodology for Vegetation Survey and Mapping

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SECTION A: GUIDELINES The NVIS structural classification is built from three components including height (linked to growth forms; Table 5), cover classes (Table 6) and growth forms (Table 7). NVIS classification crown cover categories ‘r’ and ‘bi’ have been modified in the NT (Table 8). Open woodlands need to have a cover of 5% or greater therefore category ‘r’ is 5-20% rather than 0.25-20% and category ‘bi’ 0-5%. Table 5. NVIS height class codes and descriptions. Height Code Description 8 Height range >30 m - Trees, Vines (in M & U), Palms (single-stemmed), Epiphytes. 7 Height range 10-30 m - Trees, Vines (in M & U), Palms (single-stemmed), Mallee, Mallee Shrub, Epiphytes. 6 Height range 2 m - Cycads, Grass-trees, Tree-ferns, Shrubs, Heath Shrub, Chenopod Shrub, Ferns, Samphire, Palms (multi-stemmed), Tussock and Hummock Grasses, Sedges, Rushes, Forbs, Epiphytes (in G), Vines (in G). 3 Height range 1-2 m - Cycads, Grass-trees, Tree-ferns, Shrubs, Heath Shrub, Chenopod Shrub, Ferns, Samphire, Palms (multi-stemmed), Tussock and Hummock Grasses, Sedges, Rushes, Forbs, Epiphytes (in G), Vines (in G). 2 Height range 0.5-1 m - Cycads, Grass-trees, Tree-ferns, Shrubs, Heath Shrub, Chenopod Shrub, Ferns, Samphire, Palms (multi-stemmed), Tussock and Hummock Grasses, Sedges, Rushes, Forbs, Liverwort, Lichen, Moss, Seagrasses. 1 Height range < 0.5 m - Cycads, Xanthorrhoea, Shrubs, Heath Shrub, Chenopod Shrub, Ferns, Samphire, Tussock and Hummock Grasses, Sedges, Rushes, Forbs, Lichen, Bryophyte, Seagrasses, Epiphytes (in G), Vines (in G). Unknown Source: ESCAVI (2003) Unknown Table 6. NVIS cover class codes and descriptions. Cover Code Description d Foliage cover 70-100% - Crown cover 80-100% - Ground cover 70-100% c Foliage cover 30-70% - Crown cover 50-80% - Ground cover 30-70% i Foliage cover 10-30% - Crown cover 20-50% - Ground cover 10-30% r Foliage cover < 10% - Crown cover 0.25-20% - Ground cover
SECTION A: GUIDELINES S Y Z C U Shrub Mallee Shrub Heath Shrub Chenopod Shrub Samphire Shrub Woody plants multi-stemmed at the base (or within 200mm from ground level) or if single stemmed, less than 2m. Commonly less than 8m tall, usually with 5 or more trunks, of which at least 3 of the largest do not exceed 100mm at breast height (1.3m). Shrub usually less than 2m, with sclerophyllous leaves having high fibre: protein ratios and with an area of nanophyll or smaller (less than 225 sq. m.). Often a member of the following families: EPACRIDACEAE, MYRTACEAE, FABACEAE and PROTEACEAE. Commonly occur in nutrient-poor substrates. Single or multi-stemmed, semi-succulent shrub of the family CHENOPODIACEAE exhibiting drought and salt tolerance. Genera (of Tribe SALICORNIOIDEAE, viz: Halosarcia, Pachycornia, Sarcocornia, Sclerostegia, Tecticornia and Tegicornia) with articulate branches, fleshy stems and reduced flowers within the CHENOPODIACEAE family, succulent chenopods. Also genus Sueda. G Tussock Grass Forms discrete but open tussocks usually with distinct individual shoots, or if not, then forming a hummock. These are common agricultural grasses. H Hummock Grass Coarse xeromorphic grass with a mound-like form often dead in the middle; genera are Triodia and Plectrachne. W Other grass Member of the family POACEAE, but having neither a distinctive tussock nor hummock appearance. V Sedge Herbaceous, usually perennial erect plant generally with a tufted habit and of the families CYPERACEAE (true sedges) or RESTIONACEAE (node sedges). R Rush Herbaceous, usually perennial erect monocot that is neither a grass nor sedge. For the purposes of NVIS, rushes include the monocotyledon families JUNCACEAE, TYPHACEAE, LILIACEAE, IRIDACEAE, XYRIDACEAE and the genus Lomandra (i.e. “graminoid” or grass-like genera). F Forb Herbaceous or slightly woody, annual or sometimes perennial plant (usually a dicotyledon). D Tree-fern Characterised by large and usually branched leaves (fronds), arborescent and terrestrial; spores in sporangia on the leaves. E Fern Ferns and fern allies. Characterised by large and usually branched leaves (fronds), herbaceous and terrestrial to aquatic; spores in sporangia on the leaves. B Bryophyte Mosses and Liverworts. Mosses are small plants usually with slender leafbearing stem with no true vascular tissue. Liverworts are often moss-like in appearance or consisting of a flat, ribbon-like green thallus. N Lichen Composite plant consisting of fungus living symbiotically with algae; without true roots, stems or leaves. K Epiphyte Epiphytes, mistletoes and parasites. Plant with roots attached to the aerial portions of other plants. Often could also be another growth form, such as fern or forb. L Vine Climbing, twining, winding or sprawling plants usually with a woody stem. P Palm Palms and other arborescent monocotyledons. Members of the ARECACEAE or the genus Pandanus (Pandanus is often multi-stemmed). X Grass-tree Australian grass trees. Members of the family XANTHORROEACEAE. A Cycad Members of the families CYCADACEAE and ZAMIACEAE. J Seagrass Flowering angiosperms forming sparse to dense mats of material at the subtidal and down to 30m below MSL. Occasionally exposed. Q Aquatic Plant growing in an inland waterway or wetland with the majority of its biomass under water for most of the year. Fresh, saline or brackish water. O Lower Plant Alga, fungus. Source: ESCAVI (2003) The three components are combined to generate structural formation classes (Table 8). Northern Territory Guidelines and Field Methodology for Vegetation Survey and Mapping 13
Page 1: DEPARTMENT OF NATURAL RESOURCES,ENV
Page 4 and 5: PREFACE This document describes the
Page 6 and 7: CONTENTS PREFACE ..................
Page 8 and 9: GLOSSARY...........................
Page 10 and 11: ACRONYMS ANZLIC BRS DEH DEM DVT ERI
Page 13 and 14: SECTION A: GUIDELINES 1.0 INTRODUCT
Page 15 and 16: SECTION A: GUIDELINES 3.0 PRINCIPLE
Page 17 and 18: SECTION A: GUIDELINES Currently, th
Page 19 and 20: SECTION A: GUIDELINES 4.0 MAPPING P
Page 21 and 22: SECTION A: GUIDELINES Table 3. Data
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Page 27 and 28: SECTION A: GUIDELINES The structura
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Page 37 and 38: SECTION A: GUIDELINES Satellite pla
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Page 65 and 66: SECTION B: FIELD METHODOLOGY Broad
Page 67 and 68: SECTION B: FIELD METHODOLOGY 5.3 Fo
Page 69 and 70: GLOSSARY CSR Datum Distribution Div
Page 71 and 72: GLOSSARY Overstorey Physiognomy Pla
Page 73 and 74: REFERENCES REFERENCES Abed, T. & St
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REFERENCES Meagher, D. (1991) The M
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APPENDICES
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APPENDICES APPENDIX 2: Overview of
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APPENDICES APPENDIX 4: Height Class
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APPENDICES TUSSOCK GRASS Closed Tus
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APPENDICES APPENDIX 6 (continued) D
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APPENDICES APPENDIX 6 (continued) G
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APPENDICES APPENDIX 8: Preliminary
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APPENDICES APPENDIX 10: Definitive
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Disturbance, Succession, adjoining
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APPENDICES APPENDIX 11: IUCN Red Li
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APPENDICES APPENDIX 13: NT Weeds Da
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APPENDICES APPENDIX 14 (continued)
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APPENDICES APPENDIX 16: Field Data
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APPENDICES APPENDIX 17: Field Data
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APPENDICES APPENDIX 17 (continued)
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APPENDICES APPENDIX 19: NT Site Pro
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Guidelines and Field Methodology for Vegetation Survey and Mapping

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