Table 1.

Results of the Generalized Least Squares (GLS) correlation between shell size and relative abundance of individuals of larger-sized species for the three analyzed groups (brachiopod + bivalve community; brachiopod and bivalve subcommunities).

Analyzed group	ARIMA(p,d,q)	p-value	Correlation	Residual standard error
Brachiopods + Bivalves	(0,0,0)	<0.001	−0.039	16.735
Brachiopods	(0,0,0)	0.001	−0.048	22.618
Bivalves	(0,0,0)	<0.001	−0.033	17.404

Time series were differenced before correlation because of the presence of trends in time and autocorrelation. Abbreviations of the parameters of the AutoRegressive Integrated Moving Average (ARIMA) fitted to the GLS model: p = number of time lags; d = degree of differencing; q = order of moving average. Statistically significant values are in bold.