Average taxonomic distinctness (AvTD – Delta+) (A), variation in the taxonomic distinctness (VarTD – Lambda+) (B) and Lambda+ and Delta+ biplots (C) calculated per season of the year for the Conceição Lagoon, Santa Catarina Island, southern Brazil. A-B: the expected mean is represented by the center dashed line and the 95% confidence interval limit is given by the solid, funnel-shaped line; C: the ellipse represents the value of the 95% confidence interval of 20 and 40 species, respectively. F: fall; S: spring; Su: summer; W: winter.