This difference was related to the
shallower depths of the inner area, and the greater tidal
influence on the outer estuary. The salinity, which ranged
between 3 (St1) and 37 (St5), decreased toward upstream,
and varied significantly (F(5, 27) = 11.25, P < 0.001) (Fig.
2B). The organic-matter content, ranging between 0.04%
and 7.1%, was higher at St1 compared to the other sampling
sites, except St6; the other stations had similar levels of
organic matter (F(5, 27) = 1.66, P = 0.177) (Fig. 2C).
This difference was related to theshallower depths of the inner area, and the greater tidalinfluence on the outer estuary. The salinity, which rangedbetween 3 (St1) and 37 (St5), decreased toward upstream,and varied significantly (F(5, 27) = 11.25, P < 0.001) (Fig.2B). The organic-matter content, ranging between 0.04%and 7.1%, was higher at St1 compared to the other samplingsites, except St6; the other stations had similar levels oforganic matter (F(5, 27) = 1.66, P = 0.177) (Fig. 2C).
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