Spatiotemporal variations of zooplankton community in a shallow tropical brackish lagoon (Sontecomapan, Veracruz, Mexico)

Zoological Studies

Table 1 Geographic location of sampling sites, median composition of the sediment, and coefficient of pollution

Number	Station	Type	Depth (cm)	% Organic matter	% Silts and clays	% Sands	Coefficient of pollution
1	Río Basura	1	77	8.3 ± 8.8	36 ± 31.2	46 ± 0	1.79
2	Costa Norte	2	80	0.4 ± 0.2	7.3 ± 1.2	92.7 ± 1.2	1.94
3	El Fraile	2	88	3.5 ± 2.4	55.3 ± 5.8	44.7 ± 5.8	3.36
4	El Sábalo	1	240	ND	ND	ND	ND
5	Punta Levisa	2	47	4.6 ± 4.4	16.7 ± 1.2	83.3 ± 1.2	3.26
6	El Cocal	2	171	ND	ND	ND	ND
7	La Palma	1	103	0.6 ± 0.6	12 ± 0	88 ± 0	1.07
8	El Real	3	255	0.1 ± 0.1	9.3 ± 8.1	86 ± 0	2.46
9	La Boya	3	124	1.8 ± 0.4	21.3 ± 1.2	78.7 ± 1.2	0.81
10	El Chancarral	3	105	1.6 ± 0.6	24 ± 0	76 ± 0	2.16

Type 1 stations have direct input of freshwater, type 2 without direct input of freshwater, and type 3 are those with a strong marine influence. The values correspond to the average ± standard deviation.