coaltech upper olifants river catchment wetland inventory ...

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Figure 22. Incomplete pans in the Landcover wetland layer 8. GAP ANALYSIS 8.1 Available literature o Although the wetlands in the UORC have been mapped extensively (mostly 1:50 000 scale), there is a lack of data on specific wetland attributes. o The status of the wetlands in the UORC is not well documented and some of the data is old. o Limited data is available on the classification of wetlands in the UORC. o The species composition of only a few wetlands in the UORC is known with any detail resulting in only a generalised species list for wetlands. o Water quality of only a few wetlands in the UORC is known. o Some species are only known to occur in wetlands in the area, with no reference as to which types of wetlands. o Tools for the determination of wetland health are focussed on riparian wetlands with no tools available to determine the health of seepage wetlands. Wetland Database for UORC - 92 -
8.2 Mapping o Small wetlands (of less than half a hectare) cannot be identified on the 1:50 000 aerial photographs and these wetlands are therefore excluded from the wetland layer. o The 1:50 000 aerial photographs are slightly skewed to the edges and there may be some inaccuracy on the exact location of some of the wetlands. o The aerial photographs were mostly taken in the winter months, thereby affecting the visibility of the wetlands on the aerial photographs. o Terrain shadow, cloud shadow and smoke from industries affect the accuracy of the wetland delineation, since these shadows can be interpreted as wetlands or can obscure wetlands. o The aerial photographs are two to three years old and changes may have taken place, including the expansion of developments over wetland areas. These developments may include residential, mining, cultivation and industrial developments. o The attributes included in the wetland database was based on the aerial photographs and the available literature, with only limited field verification possible. o The field verification of some of the wetlands will not replace site specific assessments. o The status of the wetlands are the most inaccurate of the attributes, since this attribute was only based on the aerial photographs and a small amount of field verification, and a number of threats not visible on an aerial photograph may impact on the wetland. o The Red Data species and important species attributes are not site specific, but based on the wetland type. The status of the wetland was not taken into account. o Threats included in the wetland database are only those threats visible on the aerial photographs. Additional threats, not visible on the aerial photographs, may be present. Wetland Database for UORC - 93 -
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COALTECH UPPER OLIFANTS RIVER CATCH
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The following aspects are included
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The most common wetland types in th
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The attributes allocated based on t
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6. DATABASE CONSTRAINTS............
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Addendums Addendum A - Plant specie
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Figure 1. Extent of the UORC (refer
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The aim of the wetland layer is to
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3.3 Wetland biodiversity Wetlands p
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Table 1: Species of concern Species
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Species name Common name Hottentot
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Species name Common name Cordylus g
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3.3.2 Birds Various bird species ut
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3.3.6 Fish The UORC has a low diver
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Figure 2. Schematic illustration of
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3.4.1.2 Floodplain riparian Floodpl
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3.4.4 Other non-riparian wetlands O
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3.5.1.2 Groundwater recharge Variou
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More important in the removal of me
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The flow velocity in the channel of
Page 41 and 42: The most important fishing activity
Page 43 and 44: 3.5.6.3 Livestock Diseases Various
Page 45 and 46: 3.6.2 Mining and Quarrying There is
Page 47 and 48: • Dwars-in-die-wegspruit at the l
Page 49 and 50: 3.6.4 Burning Wetlands are burnt on
Page 51 and 52: 3.6.9 Alien Fauna and Flora 3.6.9.1
Page 53 and 54: Category 3 plant invaders are plant
Page 55 and 56: o The Fish Assemblage Integrity Ind
Page 57 and 58: Figure 4. The ecoregions of the Oli
Page 59 and 60: Sixteen fish species (four of which
Page 61 and 62: Figure 5. Extent of the UORC accord
Page 63 and 64: 3.9 Common wetland types in UORC Ac
Page 65 and 66: In a wetland assessment conducted a
Page 67 and 68: In a wetland study at Douglas Colli
Page 69 and 70: Figure 8. Status of assessed wetlan
Page 71 and 72: Figure 9. Portion of the wetland la
Page 73 and 74: Figure 11. Portion of the water bod
Page 75 and 76: Figure 13. Portion of the separated
Page 77 and 78: Figure 15. Portion of the wetland l
Page 79 and 80: Since the field verification site v
Page 81 and 82: Figure 18. Portion of the final wet
Page 83 and 84: Upon a request from DWAF the status
Page 85 and 86: 5.8 Functions The functions likely
Page 87 and 88: 5.11 Wetland types The entire catch
Page 89 and 90: 6. DATABASE CONSTRAINTS The greates
Page 91: Figure 21. The wetland in the UORC
Page 95 and 96: The attributes in the attribute tab
Page 97 and 98: 10. REFERENCES Abbott Grobicki (Pty
Page 99 and 100: Goudie, A.S. & Thomas, D.S.G. 1985.
Page 101 and 102: Merot, P., Squividant, H., Aurousse
Page 103 and 104: Wilson, R.T. 2003. Animal health an
Page 105 and 106: Addendum A - Plan species list Wetl
Page 107 and 108: var. lachnantha Lamiaceae Ajuga oph
Page 109 and 110: Asteraceae Berkheya onopordifolia B
Page 111 and 112: Poaceae Chloris pycnothrix Chloroph
Page 113 and 114: Poaceae Boraginaceae incompletus Cy
Page 115 and 116: Poaceae Echinochloa cruspavonis * *
Page 117 and 118: Asteraceae Gamochaeta subfalcata Y
Page 119 and 120: Sterculiaceae Sterculiaceae Poaceae
Page 121 and 122: Cyperaceae Kyllinga erecta Kyllinga
Page 123 and 124: Asteraceae Nidorella anamola Nympho
Page 125 and 126: Polygonaceae Apiaceae Poaceae Apiac
Page 127 and 128: Brassicaceae Rorippa nudiuscula * *
Page 129 and 130: Poaceae Setaria verticillata * Malv
Page 131 and 132: Asteraceae Ursinia nana * * * Lenti
Page 133 and 134: Addendum B - Mammal species list We
Page 135 and 136: Cynictis Yellow Carnivora penicilla
Page 137 and 138: Addendum C - Bird species list Wetl
Page 139 and 140: Actitis hypoleucos Actophilornis Co
Page 141 and 142: Ceryle rudis Nectarinia Pied Kingfi
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Eremopterix verticalis Estrilda ast
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Netta erythrophthalma Numida meleag
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Spizocorys conirostris Pinkbilled L
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Addendum D - Reptile species list W
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Elapidae Naja haje Egyptian cobra X
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Group Species name Common name Pipi
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Addendum F - Fish species list Wetl
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Austroglansis sclateri X X Barbus a
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Phylum Group Species name Common na
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Arachnida Tanycypris obtusa Hydroze
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gibba Daphnia pulex Simocephalus ca
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Ischnura senegalensis Pseuddgrion s
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Micronecta sp. Micronecta piccanin
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Hydraenidae Hydrophilida e Berosus
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MOLLUSCA Simulium adersi Simulium ?
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