River and stream water quality and ecology - Greater Wellington ...

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River and stream water quality and ecology in the Wellington region: State and trends Table 7.4 cont.: Summary of fish species recorded in the Wellington region based on 583 river and stream records extracted from the NZFFD for the period 1990 to 2010. The threat categories from Allibone et al. (2010) are also listed. * and ** indicate diadromous species and ‘marine wanderers’, respectively Common name Scientific name No. of records Frequency of occurrence (% of sites) Threat category Yelloweye mullet** Aldrichetta forsteri 6 1.0 Not threatened Giant bully* Gobiomorphus gobioides 5
River and stream water quality and ecology in the Wellington region: State and trends IBI score 60 50 40 30 20 10 0 (17) (17) (21) (19) (67) (31) (219) (15) (23) (19) (31) (19) Otaki Waitohu Waikanae Porirua Hutt PAGE 96 OF 160 WGN_DOCS-#1100598-V3 Wainuiomata Figure 7.2: Box plot showing the range of IBI scores for selected catchments in the Wellington region (with n ≥15), calculated from NZFFD records for the period 1990 to 2010. Numbers in brackets indicate the number of records within each catchment and an * denotes ‘sub-catchments’ of the Ruamahanga River Table 7.5: IBI classes assigned to 583 NZFFD records for rivers and streams in the Wellington region (1990 to 2010), summarised according to records within each REC landcover class Ruamahanga IBI class Excellent Very Landcover good Good Fair Poor Very No native poor fish Total n % n % n % n % n % n % n % Indigenous forest 6 2 18 7 51 19 67 25 103 38 22 8 2 1 269 Exotic forest 0 0 1 13 0 0 4 50 3 38 0 0 0 0 8 Pasture 5 2 1 0.5 25 11 44 19 94 41 55 24 4 2 228 Urban 0 0 0 0 5 6 15 19 39 50 18 23 1 1 78 Overall (total) 11 2 20 3 81 14 130 22 239 41 95 16 7 1 583 Parkvale* Taueru* Upper Ruamahanga* Waingawa* Waiohine*
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River and stream water quality and
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DISCLAIMER This report has been pre
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observed trends were unclear. The p
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5. Periphyton - state and trends 57
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Figure 2.1: RSoE monitoring sites a
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2.4.2 Biological variables River an
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4.2 Temporal trends River and strea
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Page 80 and 81: Chlorophyll a (mg/m 2 ) 90 80 70 60
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Page 90 and 91: RS06 Shade RS11 Habitat RS35 RS49 R
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