Byron Flora and Fauna Study 1999 - Byron Shire Council

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BYRON FLORA AND FAUNA STUDY, 1999 Table 4.2 Data sources used to complement the plot-based vegetation survey Site code Data source Fields Methodology notes P Current Study, Pottsville mapsheet all as detailed in this report BH Current Study, Brunswick Heads all as detailed in this report mapsheet BB Current Study, Byron Bay mapsheet all as detailed in this report BU Current Study, Burringbar mapsheet all as detailed in this report H Current Study, Huonbrook mapsheet all as detailed in this report D Current Study, Dunoon mapsheet all as detailed in this report PS Byron Shire Flora Survey Pilot Study general additional data available (Milledge and McKinley 1996) site data in Pilot Study database AB Private survey data all (A. Benwell pers. comm.) Z1, 14 Holmes (1987) general site species list refers to data and vegetation polygon species list only Z15, 16 Floyd, A.G. (undated a; 1990b) “ “ Z2, 4, 6, 7, H. & S. Bower (unpubl. data) “ “ 9, 12, 17 Z3 S. Bower (unpubl. data) “ “ Z5 H. & S. Bower (unpubl. data with “ “ additions from Holmes 1987) Z8 H. & S. Bower (unpubl. data with “ “ additions from Biosis 1990) Z10, 11 H. Bower (unpubl. data) “ “ Nomenclature used normally followed Harden (1990, 1991, 1992, 1993). Where older nomenclature has been used in species lists incorporated from other sources, the original names have been retained except where they can unambiguously be converted to current nomenclature. 4.5 LIMITATIONS Only a selected set of sites was sampled across the mapped vegetation units (Section 4.7) and these cannot be regarded as providing comprehensive coverage of the Shire. Because of the intrinsic variation inherent in larger patches of vegetation and between scattered patches of vegetation, the relative abundance of canopy species described for some sites may not precisely reflect the canopy species composition across all occurrences of the one mapping unit. 4.6 RESULTS AND DISCUSSION 4.6.1 Representation of vegetation mapping units Thirteen vegetation mapping units were recognized (Table 4.3). Vegetation dominated by the introduced Camphor Laurel was the most abundant vegetation type, occupying more than one quarter of the vegetated area of the Shire. Moist to dry sclerophyll forest and rainforest were the next most abundant vegetation categories, while only tiny amounts of the coastal vegetation types (Scribbly Gum Eucalyptus signata-Red Bloodwood Corymbia gummifera, Wallum Banksia Banksia aemula-Scribbly Gum, Cypress Pine Callitris columellaris, Mangrove forest and Sedgeland-Fernland/Grassland) were recorded. 35
A GREENPRINT FOR A SUSTAINABLE FUTURE Table 4.3 Areal extent of vegetation mapping units (incl. plantations and unassessed) Vegetation mapping unit area (ha) % of vegetated % of Shire land (including (minus NP plantations and and SF) unassessed) Rainforest (minimal Camphor Laurel presence) 2122.31 11.98 4.12 Rainforest (low to moderate Camphor 1563.79 8.82 3.04 Laurel presence) Camphor Laurel +/- naturalized exotic 4658.68 26.29 9.06 tree species Brush Box forest 949.05 5.36 1.84 Wet to moist sclerophyll forest 1897.90 10.71 3.69 Moist to dry sclerophyll forest 2780.55 15.69 5.41 Wattle/Mixed regrowth forest and shrubland 1039.10 5.86 2.02 Swamp sclerophyll forest 1754.78 9.90 3.42 Heathland/Shrubland 533.70 3.01 1.04 Sedgeland-Fernland/Grassland 98.67 0.56 0.19 Mangrove forest 96.24 0.54 0.19 Unassessed 153.63 0.87 0.30 Plantation 72.33 0.41 0.14 TOTAL 17720.72 100.00 34.46 Thirty-eight vegetation associations were recognised (Table 4.4). Areal occurrence of vegetation mapping units and associations by geology/soil type were calculated (Table 4.5). 36
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