Ecological Archives A016-072-A2

Regina H. Magierowski and Craig R. Johnson. 2006. Robustness of surrogates of biodiversity in marine benthic communities. Ecological Applications 16:2264–2275.

Appendix B. A figure showing Bray-Curtis similarity between the surrogate set identified by SIMPER (PRIMER5) for each deployment date and the surrogate set identified by SIMPER for holdfasts deployed in December 1997, for each community age.

 
   FIG. B1. Bray-Curtis similarity between the surrogate set identified by SIMPER (PRIMER5) for each deployment date and the surrogate set identified by SIMPER for holdfasts deployed in December 1997, for each community age. Two techniques were used to select surrogates: ( + ) taxa were included in a surrogate set if they contributed >/= 5 % to the average similarity within treatments and had a ratio of average similarity to standard deviation >/= 1.4; and (solid circles) taxa were included in a surrogate set in order of decreasing percent contribution to the average similarity within treatments until the cumulative contribution was 80 % (note that this technique consistently selected a greater number of families in the surrogate set than the criteria based on contribution of >/= 5% to average similarity). Community ages were (a) 1 month, (b) 2 months, (c) 3 months, (d) 4 months, (e) 5 months, (f) 7 months, and (g) 8 months.


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