Allium cepa Bio Assay to Assess the Water and Sediment Cytogenotoxicity in a Tropical Stream Subjected to Multiple Point and Nonpoint Source Pollutants

Table 2

Spatial variation of sediment quality parameters in sampling sites during the study period. Data are presented as mean ± standard deviation (SD). Results indicated by different superscript letters in each row are significantly different from each other (ANOVA, Tukey’s test, p < 0.05, n=10).

	site A	site B	site C	site D	site E	site F
Sediment sand %	50.7 ± 4.	37.0 ± 1.	34.6 ± 1.	32.4 ± 2.	51.1 ± 3.	60.8 ± 3.
Sediment silt %	38.6 ± 5.	44.0 ± 4.	46.4 ± 2.	26.9 ± 3.	24.0 ± 2.	21.7 ± 3.
Sediment clay %	10.7 ± 2.	20.5 ± 2.	19.0 ± 1.	40.6 ± 4.	28.2 ± 2.	22.3 ± 1.
Shallow sediment TOM%	2.32 ± 0.2	2.04 ± 0.1	1.61± 0.1	1.32 ± 0.1	1.88 ± 0.2	1.11 ± 0.1
Shallow sediment pH	5.56 ± 0.3	5.86 ± 0.2	5.85 ± 0.2	5.62 ± 0.2	5.11 ± 0.0	4.71 ± 0.0
Shallow sediment conductivity (µS/cm)	5570 ± 72	4206 ± 64	535.7 ± 80.	195.3 ± 28.	36.36 ± 4.0	25.29 ± 2.1