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 ...
Create successful ePaper yourself
Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.
<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 />
Figure 6.10: Macroinvertebrate <strong>quality</strong> classes for 55 RSoE sites in the <strong>Wellington</strong><br />
region, based on mean MCI scores from annual samples collected during 2009,<br />
2010 <strong>and</strong> 2011<br />
Macroinvertebrate NMDS axis 1 score<br />
3.5<br />
3.0<br />
2.5<br />
2.0<br />
1.5<br />
1.0<br />
0.5<br />
0.0<br />
r s = -0.66<br />
0 10 20 30 40<br />
Proportion of impervious cover in up<strong>stream</strong> catchment (%)<br />
Figure 6.11: Scatter plot demonstrating the relationship between intensity of urban<br />
l<strong>and</strong> use (represented by proportion of impervious cover in up<strong>stream</strong> catchment)<br />
<strong>and</strong> macroinvertebrate health (as represented by a score from multivariate<br />
analysis which summarises three macroinvertebrate metrics – MCI, QMCI <strong>and</strong><br />
number of EPT taxa) at 67 sites within or near to urban areas of Hutt, <strong>Wellington</strong><br />
<strong>and</strong> Porirua cities <strong>and</strong> the Kapiti Coast sampled by Kingett Mitchell (2005a)<br />
between 2002 <strong>and</strong> 2008<br />
WGN_DOCS-#1100598-V3 PAGE 87 OF 160
Change language