Ecological Archives E089-183-A1

K. E. Fabricius and G. De'ath. 2008. Photosynthetic symbionts and energy supply determine octocoral biodiversity in coral reefs. Ecology 89:3163–3173.

Appendix A. A table showing the 20 octocoral families and 73 genera recorded in shallow waters of coral reefs of the Great Barrier Reef, their relative frequency and trophic group, and a figure of partial dependency plots from the boosted tree analysis showing the interactions between the spatial factors affecting the richness of phototrophic and heterotrophic octocoral assemblages on the Great Barrier Reef.

TABLE A1. The 20 octocoral families and 73 genera recorded in shallow waters of coral reefs of the Great Barrier Reef, their relative frequency (F, as percentage of transects where a taxon was found), and trophic group (G: P = phototrophic, H = heterotrophic). Hash symbols mark the two genera with two trophic modes (some species within the genus Stereonephthya are heterotrophic while some species of Junceella are phototrophic). A bracket indicates the genera that were indistinguishable in the field; these were pooled in field surveys (e.g., Xenia and Heteroxenia). Names of genera not encountered in these surveys but known to also occur on the GBR (Fabricius and Alderslade [2001] and K. Fabricius, personal observations) are also added for completeness, their names are given in parentheses and with no information on their relative frequencies.

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   FIG. A1. Partial dependency plots from the boosted tree analysis showing the interactions between the spatial factors affecting the richness of phototrophic and heterotrophic octocoral assemblages on the Great Barrier Reef. The interactions represent all pair-wise combinations of relative distance along and across the Great Barrier Reef, and depth (m). Relative distance along the Great Barrier Reef ranges from 0 at the southern end to 1 at the far northern end of the Great Barrier Reef, and relative distance across is 0 on the coast and 1 at the 80 m depth contour of the outer continental shelf. Depth effects are monotonically constrained.


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