River and stream water quality and ecology - Greater Wellington ...
River and stream water quality and ecology - Greater Wellington ...
River and stream water quality and ecology - Greater Wellington ...
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<strong>River</strong> <strong>and</strong> <strong>stream</strong> <strong>water</strong> <strong>quality</strong> <strong>and</strong> <strong>ecology</strong> in the <strong>Wellington</strong> region: State <strong>and</strong> trends<br />
Although RSoE sites located on the region’s larger rivers (eg, the Otaki, Hutt,<br />
Wainuiomata, Ruamahanga <strong>and</strong> Waiohine rivers) tended to be classed as<br />
‘excellent’ or ‘good’, mean MCI scores at sites on the middle <strong>and</strong> lower<br />
reaches of these rivers were often considerably lower than at sites in the upper<br />
catchment reaches. For example, there was a difference in mean MCI score of<br />
36 points between Ruamahanga <strong>River</strong> at McLays (a highly forested head<strong>water</strong>s<br />
site) <strong>and</strong> Ruamahanga <strong>River</strong> at Te Ore Ore (approximately 25 km down<strong>stream</strong><br />
at which point pastoral l<strong>and</strong>cover makes up 72% of the up<strong>stream</strong> catchment).<br />
6.1.3 Relationships between MCI, l<strong>and</strong>cover <strong>and</strong> environmental variables<br />
Strong relationships were found between mean MCI scores <strong>and</strong> l<strong>and</strong>cover in<br />
the up<strong>stream</strong> catchment. In particular, there was a strong positive correlation<br />
(rs=0.8, p
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