Effects of Urbanization on Water Quality and the Macrobenthos Community Structure in the Fenhe River, Shanxi Province, China

Table 2

Environmental parameters for sediment at the sampling sites and the relationships between the parameters and land use.

Variable	Min	Max	Mean	SD	r
					Cropland (%)	Grassland (%)	Forest (%)	Wetland (%)	Percentage of impervious area (PIA, %)
TN (g/kg)	0.74	1.49	1.02	0.19	0.260	−0.240	−0.195	0.220	0.449
TP (mg/kg)	0.60	1.65	0.80	0.24	0.322	−0.216	−0.270	−0.037	0.219
SOM (g/kg)	13.71	84.05	32.99	18.95	0.253	−0.260	−0.126	0.051	0.322
Particle size >2 mm (%)	0.00	38.69	6.22	10.95	−0.139	−0.196	0.294	0.307	−0.54
Particle size <2 mm (%)	61.31	100.00	93.78	10.95	0.139	0.196	−0.294	−0.307	0.54
PAHs (mg/kg)	0.28	23.33	2.83	5.03	0.026	−0.185	−0.296	0.206	0.658
Zn (mg/kg)	28.91	119.73	48.7	21.69	−0.024	−0.034	−0.183	0.276	0.353
Pb (mg/kg)	8.47	20.74	13.44	3.19	0.414	−0.591	−0.140	0.140	0.209
Cd (mg/kg)	0.06	0.27	0.12	0.05	0.351	−0.436	−0.185	0.152	0.363
Cr (mg/kg)	16.33	98.64	37.10	16.06	0.232	−0.014	−0.439	0.164	0.394
Ni (mg/kg)	7.21	32.27	16.08	5.90	−0.150	−0.094	−0.165	0.573	0.538
Cu (mg/kg)	5.85	65.78	15.89	12.61	−0.107	−0.210	−0.276	0.636	0.787

TN, total nitrogen concentration; TP, total phosphorus concentration; SOM, sediment organic matter content; PAHs, polycyclic aromatic hydrocarbon concentration; SD, standard deviation. ; .