Table 4.

Characteristics of low-diversity samples.

Terroir	Global practice	Hill number 0 (richness)	Hill number 1 (~Shannon)	Hill number 2 (~Simpson)	nb_seq
Côte des Blancs	Conversion	3	1.87	1.68	42,775
Langoiran	Conventional	3	1.87	1.57	12,643
Côte des Blancs	Conventional	4	1.71	1.39	28,481
Côte des Blancs	Organic	4	1.99	1.5	35,728
Côte des Blancs	Conventional	6	1.34	1.12	41,991
Côte des Blancs	Conventional	7	1.64	1.25	46,114
Vallee de la Marne	Conventional	7	2.48	1.75	11,777
Côte des Blancs	Conversion	8	1.17	1.05	45,845
Côte des Blancs	Conventional	9	1.45	1.16	45,017
Côte des Bar	Conventional	14	2.37	1.5	28,971
Cevennes	Conventional	15	1.92	1.35	93,308
Tain	Conversion	17	3.19	1.81	73,345
Rian	Organic	22	3.89	1.96	42,998
MEAN	(Low-diversity samples)	9.15	2.07	1.47	42,230
MEAN	(All samples)	18.12	5.65	4.05	48,229
MAX	(All samples)	44	13.13	8.8	101,183

We consider a sample to be poor if the Hill number 1 or Hill number 2 index are below 2.