Biodiversity (1 - SRK Consulting

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(increasing or decreasing with time); controversy potential and precedent setting; threat to environmental and health standards. • Spatial scope refers to the geographical scale of the impact. • Duration refers to the length of time over which the stressor will cause a change in the resource or receptor. The significance of the impact is then assessed by rating each variable numerically according to defined criteria as outlined in Table 7.2. The purpose of the rating is to develop a clear understanding of influences and processes associated with each impact. The severity, spatial scope and duration of the impact together comprise the consequence of the impact and when summed can obtain a maximum value of 15. The frequency of the activity and the frequency of the impact together comprise the likelihood of the impact occurring and can obtain a maximum value of 10. The values for likelihood and consequence of the impact are then read off a significance rating matrix (Table 7.3), used to determine whether mitigation is necessary 2 . Measures such as demolishing infrastructure, and reinstatement and rehabilitation of land, are considered post-mitigation. The model outcome of the impacts is then assessed in terms of impact certainty and consideration of available information. The Precautionary Principle is applied in line with South Africa’s National Environmental Management Act (No. 108 of 1997) in instances of uncertainty or lack of information by increasing assigned ratings or adjusting final model outcomes. In certain instances where a variable or outcome requires rational adjustment due to model limitations, the model outcomes are adjusted. 2 Some risks/impacts that have low significance will however still require mitigation 148
Table 1: Criteria for assessing significance of impacts Severity of impact RATING Insignificant / non-harmful 1 Small / potentially harmful 2 Significant / slightly harmful 3 Great / harmful 4 Disastrous / extremely harmful 5 Spatial scope of impact RATING Activity specific 1 Mine specific (within the mine boundary) 2 Local area (within 5 km of the mine boundary) 3 Regional 4 National 5 CONSEQUENCE Duration of impact RATING One day to one month 1 One month to one year 2 One year to ten years 3 Life of operation 4 Post closure / permanent 5 Frequency of activity/ duration of aspect RATING Annually or less / low 1 6 monthly / temporary 2 Monthly / infrequent 3 Weekly / life of operation / regularly / likely 4 Daily / permanent / high 5 LIKELIHOOD Frequency of impact RATING Almost never / almost impossible 1 Very seldom / highly unlikely 2 Infrequent / unlikely / seldom 3 Often / regularly / likely / possible 4 Daily / highly likely / definitely 5 149
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A vegetation and vertebrate fauna d
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Some of the rare or beautiful succu
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6.3.3 Field Survey ................
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12.1 Specific mitigation measures .
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Figure 25. The vegetation sensitivi
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Figure 54. An easterly view from Bo
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EXECUTIVE SUMMARY Vegetation Althou
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designated sensitive areas and excl
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Holdings (SHE, Pty Ltd). The main c
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2. ASSIGNMENT Eco-Agent Ecological
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3. RATIONALE It is widely recognise
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4. SCOPE AND OBJECTIVES OF THE STUD
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Figure 3. Satellite image showing t
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Topography and drainage The topogra
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Figure 6. Close-up satellite image
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6. METHODS Prior to the field visit
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6.1.3 Sensitivity Only High and Low
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• Low probability of occurrence w
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The biodiversity significance of an
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oth by reference to the comprehensi
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6.4. Herpetofauna 6.4.1. Field Surv
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• Armadillo Girdled Lizard (Cordy
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7.2 Description of the plant commun
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Figure 12. Stipagrostis namaquensis
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is low, 70-110 mm per annum, mostly
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Figure 14. Grassland on sandy hummo
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This plant community with its speci
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Crassula sericea Dicoma capensis Cu
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Figure 17. A scree slope 4.2.2 Stee
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species also occur on the mountain
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Schmidtia kalahariensis d Stipagros
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5.2 Washes The drainage lines withi
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in a population going extinct elsew
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7.4 Fine Scale Biodiversity Fine sc
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The SKEP (2005) biodiversity map fo
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National Herbarium. This is therefo
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Figure 26. A map indicating the Bla
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7.10 References Acocks, J.P.H. 1988
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8. RESULTS: MAMMALS Acocks (1988),
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Figure 27. A south-westerly view ov
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8.2 Observed and Expected Mammal Sp
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√ Otocyon megalotis Bat-eared fox
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8.4 Discussion Four pertinent matte
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Knobel, J. & Bredenkamp, G. 2005. T
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9. RESULTS: AVIFAUNA 9.1 General Th
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Figure 33. View east from the Zuurw
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Figure 36. View north from the sout
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Figure 39. View west towards Hoedko
Page 98 and 99: Figure 42. Patch of green vegetatio
Page 100 and 101: Table 1: Rating of recognised on-si
Page 102 and 103: Burchell’s Coucal Centropus burch
Page 104 and 105: Karoo Eremomela Eremomela gregalis
Page 106 and 107: 9.4. Threatened and Red-Listed Bird
Page 108 and 109: The remaining four threatened speci
Page 110 and 111: Department of Environmental Affairs
Page 112 and 113: 10. RESULTS: HERPETOFAUNA 10.1. Her
Page 114 and 115: Figure 46. A view of red dunes and
Page 116 and 117: Figure 50. Man-made quarry on the w
Page 118 and 119: In the western corner of the study
Page 120 and 121: Very few trees occur on the study s
Page 122 and 123: Table 1: Reptile and Amphibian spec
Page 124 and 125: ? Prosymna bivittata Two-striped Sh
Page 126 and 127: Psammophis notostictus Karoo Whip o
Page 128 and 129: 10.6 Conclusions The main conservat
Page 130 and 131: 11. ENVIRONMENTAL IMPACT ASSESSMENT
Page 132 and 133: assuming that the water does not ha
Page 134 and 135: Vegetation Deficient plant -5 Mediu
Page 136 and 137: Impact Table 2a:: Impact on biodive
Page 138 and 139: Substrate repair 1 2 2 1 2 15 Very
Page 140 and 141: maintenance, with designated passin
Page 142 and 143: M6: Control of plant diversity/stru
Page 144 and 145: Some Red Data plants and animals oc
Page 146 and 147: Flora Some areas of infrastructure
Page 150 and 151: Table 2: Significance Rating Matrix
Page 152 and 153: APPENDIX 2: CURRICULII VITAE Abridg
Page 154 and 155: - >150 papers at national and inter
Page 156 and 157: Visits to Israel, Italy, Germany, U
Page 158 and 159: Abridged Curriculum Vitae: Ignatius
Page 160 and 161: Abridged Curriculum Vitae: Alan Cha
Page 162 and 163: - 15 contributions in or as books
Page 164 and 165: Abridged Curriculum Vitae: Jacobus
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