Figure 1.

Map of the Manawatū River catchment in blue and the six sampling sites as coloured circles, with the inset showing the river catchment location on the North Island of New Zealand as a red square. P1 and P2 are ‘pristine’ sites having only flowed through native bush (seen as dark green areas on the satellite image). F1 and F2 are ‘farming’ sites flowing through intensive agricultural land (light green on the satellite image). U1 and U2 are ‘urban’ sites, flowing through two urban areas: Feilding and Palmerston North (grey on the satellite image). The water flows from the east and south towards the sea on the west coast, as indicated by the white arrows. Satellite image created using Google Earth.