Table 1.

Model selection for the effect of time, species and morphological group. Italics indicate the model with the lowest AICc value.

model	d.f.	AICc	adjusted R2
log(areat+1) ∼ offset(log(areat))	2	1971.377
log(areat+1) ∼ offset(log(areat)) + group	7	1964.730	0.7985
log(areat+1) ∼ offset(log(areat)) + year	5	1950.108	0.8081
log(areat+1) ∼ offset(log(areat)) + species	12	1971.011	0.7976
log(areat+1) ∼ log(areat)	3	1955.052	0.7807
log(areat+1) ∼ log(areat) + group	8	1946.720	0.7837
log(areat+1) ∼ log(areat) + log(areat):group	8	1947.799	0.7833
log(areat+1) ∼ log(areat) × group	13	1955.384	0.7833
log(areat+1) ∼ log(areat) + species	13	1952.889	0.7835
log(areat+1) ∼ log(areat) + log(areat):species	13	1953.215	0.7833
log(areat+1) ∼ log(areat) × species	23	1957.555	0.7846
log(areat+1) ∼ log(areat) + year	6	1927.974	0.7895
log(areat+1) ∼ log(areat) + log(areat):year	6	1919.232	0.7911
log(areat+1) ∼ log(areat) × year	9	1914.654	0.7915
log(areat+1) ∼ log(areat) + year + group	11	1917.721	0.7927
log(areat+1) ∼ log(areat) + year × group	26	1908.040	0.7986
log(areat+1) ∼ log(areat) × group × year	49	1910.305	0.7921
log(areat+1) ∼ log(areat) + year + species	16	1923.726	0.7926
log(areat+1) ∼ log(areat) + year × species	46	1924.281	0.7997
log(areat+1) ∼ log(areat) × species × year	89	1929.261	0.8074