an increasing trendp < 0.001
Summer averaged concentrations in MTZ1 show an increasing trend over 1995–2015 (slope = 2 mg L −1 yr −1 , p < 0.001, R 2 = 0.566, Fig. 2C ).
Summer averaged concentrations in MTZ1 show an increasing trend over 1995–2015 (slope = 2 mg L −1 yr −1 , p < 0.001, R 2 = 0.566, Fig. 2C ).
In the most downstream part of the estuary, 0–50 km, annual average concentrations show a weakly significant increase, at a rate of 0.5 mg L −1 yr −1 (p < 0.05, R 2 = 0.21) (Fig. 2F ).