Associated Use Attainment Response between Multiple Aquatic Assemblage Indicators for Evaluating Catchment, Habitat, Water Quality, and Contaminants

Table 2

Summary statistics for eight chemistry (concentration/ppm), habitat, and land use variables by macroinvertebrate grouping cluster (see Figure 2(b)) in watersheds of the Big Oaks National Wildlife Refuge.

Variable		Mean	Min	Max	SD
Cluster 1	—	—	—	—	—
Barium	13	52.46	30.5	81.9	12.93
Fluoride	13	0.12	0.05	0.2	0.06
Lead	13	0.19	0.1	1.31	0.34
Manganese	13	124.52	39.7	275	71.42
Sulfate	13	13.99	9.1	23	4.07
pH	13	8.13	7.44	9.5	0.59
QHEI score	13	58.23	50.5	70.5	5.23
Water land use	13	3.53	0.06	14.62	5.01
Cluster 2	—	—	—	—	—
Barium	5	53.3	34.8	67	11.63
Fluoride	5	0.07	0.05	0.1	0.03
Lead	5	0.1	0.1	0.1	0
Manganese	5	67.12	31.7	130	41.7
Sulfate	5	15.6	12	20	3.29
pH	5	8.31	7.45	8.69	0.51
QHEI score	5	64.9	62.5	67.5	2.38
Water land use	5	2.99	0.41	6.25	2.79
Cluster 3	—	—	—	—	—
Barium	5	79.6	56.7	124	27.59
Fluoride	5	0.19	0.05	0.3	0.09
Lead	5	1.27	0.1	3.13	1.29
Manganese	5	672	52	2500	1038.09
Sulfate	5	9.28	7.2	11	1.74
pH	5	7.67	7.14	7.9	0.31
QHEI score	5	56.6	25	67	17.81
Water land use	5	0.23	0	0.5	0.24
Cluster 4	—	—	—	—	—
Barium	13	55.74	31.9	107	18.03
Fluoride	13	0.07	0.05	0.1	0.03
Lead	13	0.1	0.1	0.1	0
Manganese	13	104.31	25.7	265	63.09
Sulfate	13	11.69	5.2	18	3.98
pH	13	8.26	7.66	9.19	0.45
QHEI score	13	68.31	55	79	9.06
Water land use	13	2.84	0.48	5.8	2.07
Cluster 5	—	—	—	—	—
Barium	7	90.43	47.2	158	43.26
Fluoride	7	0.14	0.05	0.2	0.07
Lead	7	0.67	0.1	2.96	1.1
Manganese	7	1352.21	99.5	6360	2322.74
Sulfate	7	22.8	6.9	45	14.67
pH	7	7.68	7.21	8.43	0.39
QHEI score	7	51.93	38	64	9.75
Water land use	7	0.57	0.13	1.23	0.41