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

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

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
  1. 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.