Ecological Archives E088-147-A3

David Balata, Luigi Piazzi, and Lisandro Benedetti-Cecchi. 2007. Sediment disturbance and loss of beta diversity on subtidal rocky reefs. Ecology 88:2455–2461.

Appendix C. Results of SIMPER analysis.

TABLE C1. Results of SIMPER analysis on patterns of abundance of individual taxa in areas characterized by low and high sediment loads. Hoverline and Voverline refer to the average abundance of taxa on horizontal and vertical substrata, respectively;deltasubis the contribution of each taxon to the average Bray-Curtis dissimilarity between horizontal and vertical habitats. Each taxon was considered important if its contribution to percentage dissimilarity exceeded the arbitrary value of geq 3%. Values of indicate that the contribution of a given taxon to percentage dissimilarity was consistent among pairwise comparisons of samples between horizontal and vertical substrata.
 Hoverline  Voverline %

Low sedimentation

Zanardina typus

 30.83 0.00 15.12 37.17 2.99
 

Turf-forming algae

 3.83 17.83 6.94 17.06

2.83

Peyssonnelia spp.

 6.33 18.00 5.81 14.27 3.73
 

Encrusting corallines

 47.83 56.67 5.14 12.63 1.14

Flabellia petiolata

 6.33 2.17 2.15 5.27 1.29

High sedimentation

Turf-forming algae

 58.33 45.67 8.14 45.46 1.42
 

Encrusting corallines

 17.67 29.33 7.40 41.34 1.57
Peyssonnelia spp. 0.33 1.00 0.65 3.63 0.99

 

TABLE C2. Results of SIMPER analysis on patterns of abundance of individual taxa within mature and recovering assemblages in control (C), treated (T), and reference (R) conditions. Abbreviations and symbols are as in Table C1.
   

Mature assemblages

 

Recovering assemblages

% i %

C

Zanardinia typus

28.50

4.00

12.94

32.42

1.86

Encrusting corallines

13.33

35.00

16.87

31.37

1.57
 

Peyssonnelia spp.

9.17

32.50

12.39

31.04

1.68

Turf-forming algae

26.33

12.00

12.66

23.54

1.70
 

Encrusting corallines

48.67

45.17

5.87

14.69

1.30

Dictyota dichotoma

11.83

0.50

9.28

17.25

2.33
 

Turf-forming algae

2.17

6.17

2.41

6.05

0.85

Peyssonnelia spp.

0.83

7.83

6.03

11.21

1.07
 

Flabellia petiolata

3.33

0.67

1.77

4.43

0.72

Flabellia petiolata

6.33

3.08

4.50

8.37

0.79
 

Palmophyllum crassum

0.00

2.67

1.41

3.53

1.89

            

T

Turf-forming algae

66.83

46.5

10.55

34.64

2.09

Turf-forming algae

51.67

52.83

7.97

41.17

1.44
 

Peyssonnelia spp.

1.67

17.83

8.41

27.60

4.88

Encrusting corallines

4.33

8.83

4.07

21.03

1.36
 

Encrusting corallines

19.00

29.33

6.71

22.04

1.43

Peyssonnelia spp.

0.00

5.00

3.86

19.96

1.42
 

Dictyota dichotoma

4.17

0.67

2.10

6.91

1.21

Flabellia petiolata

1.33

1.00

1.27

6.56

1.21
C Encrusting corallines

20.00

39.67

10.31

40.86

 1.89 Turf-forming algae

81.17

74.33

5.35

 43.86 1.66
 

Turf-forming algae

67.50

49.00

9.69

38.42

2.06

Encrusting corallines

7.17

8.67

2.85

23.37

1.29
  Peyssonnelia spp. 3.50

5.67

2.84

 11.25 1.24 Peyssonnelia spp.

0.83

3.17

1.72

 14.10 0.80

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