Seasonal variation in the diet of estuarine bivalves
Fig 6
Relationships between the δ13C signals and shell length estuarine bivalves at the Balgzand tidal flats in March, June, September and December 2014.
Linear relationships with significant (p < 0.05) slopes are plotted as solid lines (see S1 Table in the supporting information for significance of these relationships). For M. edulis, the δ13C signal significantly increased with shell length (+0.02 δ13C mm-1) with the intercept of this relationship being higher in September and December as in March (Fig 6, S1 Table). The slopes of these relationships were not significant for the other three estuarine bivalve species examined (Fig 6, S1 Table).