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Table 2 Mean value and the one-way analysis of variance (ANOVA) of complex hydraulic variables and physicochemical factors in four habitats, Poyang Lake

From: Effect of complex hydraulic variables and physicochemical factors on freshwater mussel density in the largest floodplain lake, China

Complex hydraulic variables

 

D (mm)

So

ks (mm)

Fr

Re

Re*

V (m/s)

Τ (N/m2)

Ï„c (N/m2)

M1

0.053 ± 0.010

5.67 ± 0.04

0.089 ± 0.019

0.056 ± 0.014

160,156 ± 38,172

0.039 ± 0.007

0.009 ± 0.002

0.117 ± 0.043

0.027 ± 0.006

M2

0.023 ± 0.001

5.30 ± 0.11

0.030 ± 0.002

0.036 ± 0.006

160,037 ± 20,397

0.010 ± 0.002

0.005 ± 0.001

0.050 ± 0.010

0.009 ± 0.001

M3

0.048 ± 0.008

4.70 ± 0.16

0.090 ± 0.007

0.047 ± 0.007

75,131 ± 14,103

0.029 ± 0.004

0.006 ± 0.001

0.044 ± 0.011

0.027 ± 0.002

M4

0.290 ± 0.015

2.50 ± 0.13

0.515 ± 0.034

0.090 ± 0.033

101,029 ± 20,228

0.192 ± 0.030

0.006 ± 0.001

0.051 ± 0.013

0.153 ± 0.010

F

119.797

79.303

141.683

1.793

4.107

30.936

2.074

2.663

140.841

p

0.000***

0.000***

0.000***

0.157

0.010**

0.000***

0.112

0.050*

0.000***

Physicochemical factors

 

WD (m)

SD (cm)

T (℃)

DO (mg/L)

Chl-a (mg/L)

pH

TN (mg/L)

TP (mg/L)

M1

9.4 ± 1.4

48.4 ± 6.2

19.3 ± 1.9

98.6 ± 1.6

7.3 ± 2.1

7.2 ± 0.1

2.01 ± 0.05

0.146 ± 0.023

M2

9.3 ± 0.8

48.9 ± 4.6

19.1 ± 1.9

98.8 ± 1.6

9.2 ± 2.7

7.0 ± 0.1

2.05 ± 0.06

0.165 ± 0.012

M3

6.8 ± 0.7

46.2 ± 3.4

20.0 ± 1.3

96.2 ± 3.4

8.5 ± 1.7

6.7 ± 0.1

1.87 ± 0.06

0.135 ± 0.006

M4

5.8 ± 1.1

52.8 ± 5.8

21.0 ± 1.9

100.7 ± 5.9

10.9 ± 2.6

7.1 ± 0.1

2.18 ± 0.07

0.161 ± 0.013

F

2.787

0.164

1.034

4.744

0.095

10.246

10.013

1.097

p

0.048*

0.920

0.384

0.005**

0.962

0.000***

0.000***

0.357

  1. Significant results are in bold (*p < 0.05; **p < 0.01, ***p < 0.001)