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Table 2 Mercury concentration statistics (ng g ^-1 ) calculated separately for the total data set, each main river, the No Gold Mined Streams (NGMS) and the Gold Mined Streams (GMS)

From: Regional distribution of mercury in sediments of the main rivers of French Guiana (Amazonian basin)

Hg (ng.g^-1)	French Guiana	Comté River	Approuague River	Mana River	Maroni River	Oyapock River	NGMS	GMS
Minimum	12	31	12	24	18	22	19	30
Maximum	1 320*	237	1 320*	768	465	775	231	930
Median	117	91	129	122	129	100	110	154
Medium	152	98	238	143	139	114	108	190
n¹	1 211	105	255	212	385	254	241	242
σ	438	45	85	100	69	937	42	137

1: number of samples, *maximum after removal of two aberrant values from the Approuague River (10.05 and 11.2 μg g^-1).

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