Ecological Archives E096-090-A3

Robert J. Mrowicki and Nessa E. O'Connor. 2015. Wave action modifies the effects of consumer diversity and warming on algal assemblages. Ecology 96:10201029. http://dx.doi.org/10.1890/14-0577.1

Appendix C. Relative contributions of macroalgal species to differences in assemblage structure.

Table C1. SIMPER analyses of differences in macroalgal assemblage structure among treatment groups, corresponding to significant terms identified in the PERMANOVA: (a) Grazer diversity (groups defined by post hoc pairwise tests, Table B1: (None, P, G) = combined group including the ‘no grazers’ treatment and Patella and Gibbula monocultures; L = Littorina monoculture; PLG = polyculture containing all three species) and (b) Temperature (within enhanced wave action only). % = percent contribution of species to average dissimilarity between groups.

 

 

(a) Grazer diversity

 

(b) Temperature

Algal species

 

Mean wet biomass (g)

 

%

 

Mean wet biomass (g)

%

 

 

(None, P, G)

  L

PLG

 

(None, P, G) vs. L

(None, P, G) vs. PLG

L vs. PLG

 

Ambient

Elevated

 

Ulva lactuca

 

8.98

5.26

7.00

 

67.82

49.64

64.39

 

8.47

7.07

54.06

Palmaria palmata

 

23.63

23.37

24.14

 

21.09

32.89

20.25

 

27.22

23.66

28.97

Fucus vesiculosus

 

102.67

99.81

96.23

 

11.09

17.48

15.37

 

101.76

102.06

16.97


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