TABLE 1.

Temporal and spatial variability of α- and β-diversity measures in the SCALEMIC plot.

Sampling Season	Mean LCBD	SD	Significance Group (# divergent sites)	CoV	Global tests for CoV Significance:
April	0.0037	0.0016	a (26)	0.444	P < 0.001
May	0.0023	0.0016	b (7)	0.716
June	0.0040	0.0046	a (15)	1.156
August	0.0025	0.0010	b (8)	0.387
October	0.0021	0.0008	b (4)	0.367
November	0.0022	0.0010	b (6)	0.456
Sampling Season	Mean 0D	SD	Significance Group	CoV	Global tests for CoV Significance:
April	4774.2	174.3	a	0.036	P < 0.001
May	4739.6	264.3	ab	0.055
June	4659.4	246.5	bc	0.052
August	4454.5	202.7	d	0.045
October	4613	166.3	c	0.036
November	4624	177.6	c	0.038
Sampling Season	Mean 2D	SD	Significance Group	CoV	Global tests for CoV Significance:
April	351.4	58.9	a	0.168	P > 0.05, not significant
May	281.4	45.1	b	0.160
June	268.2	47.0	b	0.175
August	278.7	40.9	b	0.147
October	250.2	33.3	c	0.133
November	244.6	38.1	c	0.156

Shown are means and standard deviations of the local contribution to β-diversity (LCBD), of species richness (Hill number 0, ⁰D), and of the linearized Simpson diversity (Hill number 2, ²D). Spatial variability is represented by the coefficient of variation (SD/mean). Global significance tests of spatial variability changes between sampling seasons include asymptotic and modified signed likelihood tests. “# divergent sites” in the top table refers to the number of sites with statistically significant contribution to overall β-diversity. A boxplot depiction of these values is found in Supplementary Figure S4.