B-7 – Area 7 - Assessment of Environmental Effects 30 The Ruahorehore Stream, both adjacent to and downstream of the proposed TSF3, is a highly modified habitat of medium ecological value. Riparian vegetation is limited with excessive macrophyte growth common. The macroinvertebrate communities present are diverse, with the pollution sensitive EPT1 taxa present at all sites, but communities are dominated by those species that are more pollution tolerant. Riparian replanting (by OGNZL and its predecessors) is present in the lower reach of the stream but is otherwise largely absent. The streambanks are slumping along much of its length and are pugged in some areas. Figure 21: Ruahorehore Stream near TSF3 (Boffa Miskell 2022a). 1 EPT stands for Ephemeroptera (mayfly), Plecoptera (stonefly) and Trichoptera (caddisfly) which are macroinvertebrates that are sensitive to water pollution.
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