Figure 1

Sampling sites covering two gradients from south (Waitematā Harbor) to north (Whangārei Harbor) and from harbors (Sample site 1–9) to coastal waters sampling locations (Sample sites 10–15).

Sampling sites covering two gradients from south (Waitematā Harbor) to north (Whangārei Harbor) and from harbors (Sample site 1–9) to coastal waters sampling locations (Sample sites 10–15).