State of the Bay Report 2011-Final.pdf - Anchor Environmental

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State of Saldanha Bay & Langebaan Lagoon 2011 Benthic macrofauna through surface layers of sand or mud. They may be carnivores, filter feeders or scavengers (Branch and Griffiths 1994). Figure 7.5. Geographic representation of the results of a PRIMER analysis showing significant clustering of sites based on the similarity of benthic macrofaunal community composition (Bray-Curtis coefficient) 138 ANCHOR e n v i r o n m en t a l
Top 10 species contributing to similarity State of Saldanha Bay & Langebaan Lagoon 2011 Benthic macrofauna Table 7.2. Top ten species characterising the benthic macrofaunal communities in Small Bay, Salamander Bay and Donkergat in 2011. Group (similarity) A1 (62%) North Small Bay A2 (55%) Ore Terminal and Mussel Farms A3 (56%) Salamander Bay and Donkergat Species Common name/group Species Common name/group Species Common name/group Upogebia capensis Mud prawn Upogebia capensis Mud prawn Upogebia capensis Mud prawn Thaumastoplax spiralis Polydora sp. Hippomedon normalis Heteromastus filiformis Ochaetostoma capense Nassarius speciosus Three-legged crab Polydora sp. Polychaete Polydora sp. Polychaete Polychaete Amphipod Polychaete Tongueworms Ochaetostoma capense Thaumastoplax spiralis Hippomedon normalis Ampelisca spinimana Tongueworms Euclymene sp. Polychaete Three-legged crab Hymenosoma orbiculare Crown crab Amphipod Nephtys hombergi Sand worm Amphipod Ostracoda Ostracod Purple-lipped dog whelk Eunoe nodulosa Polychaete Diopatra monroi Polychaete Ostracoda A (spiky) Ostracod Paramoera capensis Amphipod Glycera convoluta Polychaete Nephtys hombergi Sandworm Ampelisca anomala Amphipod Tellina gilchristi Gilchrist's tellin Glycera convoluta Polychaete Nassarius speciosus Purple-lipped dog whelk Venerupis corrugata Corrugated Venus (Bivalve) 139 ANCHOR e n v i r o n m en t a l
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Saldanha Bay and Langebaan Lagoon:
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State of Saldanha Bay & Langebaan L
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Jul-05 Sep-05 Nov-05 Jan-06 Mar-06
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Average Daily Flow (m3/day) Apr-03
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Average daily flow (m 3 /day) Faeca
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Ammonia Nitrogen (mg/l as N) Nitrat
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Volume of Effluent (kL) Jan-01 Mar-
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Mussels Oysters Abalone Scallops Re
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Cadmium (mg/kg) Lead(mg/kg) Mercury
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Beach Width (m) State of Saldanha B
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High 05 High 08 High 09 High 10 Hig
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Number of species State of Saldanha
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Fish abundance (No.m -2 ) State of
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Number of breeding pairs State of S
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Number of birds 1976 1977 1978 1979
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No. sites Abundance (no. ind. m -2
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