Natural substrate

Average dissimilarity: 42.22

Control

Impacted

Species

Av.Abund

Av.Abund

Av.Diss

Diss/SD

Contrib%

Cum.%

Amphora pediculus (Kützing) Grunow

4.85

3.87

1.84

1.34

4.37

4.37

Nitzschia inconspicua Grunow

3.1

2.05

1.61

1.35

3.81

8.18

Navicula capitatoradiata Germain

1.93

0.98

1.43

1.28

3.39

11.57

Reimeria uniseriata Sala, Guerrero & Ferrario

1.64

1.37

1.14

1.26

2.69

14.26

Cocconeis placentula var. trilineata (Peragallo & Héribaud) Cleve

0.81

1.8

1.07

1.09

2.54

16.8

Amphora copulata (Kützing) Schoeman & Archibald

2.18

2.3

1.03

1.45

2.45

19.25

Navicula tripunctata (O. F. Müller) Bory

0.63

1.32

0.97

1.29

2.3

21.55

Amphora indistincta Levkov

1.49

2.03

0.91

1.35

2.16

23.71

Melosira varians C. Agardh

1.56

1.35

0.89

1.42

2.1

25.81

Nitzschia dissipata (Kützing) Grunow

1.12

1.08

0.87

1.34

2.07

27.88

Cocconeis placentula var. lineata (Ehrenberg) Van Heurck

1.63

2.25

0.87

1.44

2.06

29.94

Navicula antonii Lange-Bertalot

1.76

1.78

0.86

1.4

2.04

31.99

Achnanthidium minutissimum (Kützing) Czarnecki

1.2

0.78

0.83

1.39

1.97

33.95

Nitzschia palea (Kützing) W. Smith

1.24

0.93

0.83

1.37

1.96

35.91

Rhoicosphenia abbreviata (C. Agardh) Lange-Bertalot

1.03

1.43

0.82

1.33

1.94

37.85

Gomphonema parvulum (Kützing) Kützing

1.04

0.56

0.81

1.13

1.91

39.76

Gomphonema rhombicum M. Schmidt

0.79

1.17

0.8

1.3

1.89

41.66

Cocconeis pediculus Ehrenberg

0.73

1.3

0.8

1.23

1.89

43.55

Staurosira construens var. venter (Ehrenberg) P. B. Hamilton

0.86

0.26

0.71

1.35

1.69

45.24

Pleurosira laevis (Ehrenberg) Compère

0.33

0.76

0.7

1.8

1.66

46.9

Cocconeis placentula Ehrenberg var. euglypta (Ehrenberg) Grunow

1.43

1.8

0.7

1.3

1.65

48.55

Navicula veneta Kützing

0.54

0.49

0.69

1.1

1.64

50.18