SUPPORTING INFORMATION Appendix S1. Examples of previous research that have investigated the effect that different environmental variables, both physical and biological, have on patterns of fish distribution, assemblage composition, and relative abundance. Environmental Variable Study Substrate type Carr, 1991; Jenkins & Wheatley, 1998; Dean et al., 2000; Williams & Bax, 2001; Harman et al., 2003 Structure and complexity Choat & Ayling, 1987; Roberts & Ormond, 1987; Jones, 1988; Hixon & Beets, 1993; Tolimieri, 1995; Caley & St. John, 1996; Friedlander & Parrish, 1998; Steele, 1999; Holbrook et al., 2000; McClanahan & Arthur, 2001; Harman et al., 2003; Willis & Anderson, 2003; Pittman et al., 2007 Water depth Meekan & Choat, 1997; Friedlander & Parrish, 1998; Connell & Lincoln-Smith, 1999; Hyndes et al., 1999; Williams & Bax, 2001; Williams et al., 2001; Brook, 2002; Curley et al., 2002 Vegetation and algal cover Leum & Choat, 1980; Choat & Ayling, 1987; Holbrook et al., 1990; Levin & Hay, 1996; Dean et al., 2000; Anderson & Millar, 2004 Oceanographic parameters, Choat & Ayling, 1987; Ysebaert et al., 2002; Lecchini et temperature and exposure al., 2003; Fulton & Bellwood, 2004; Schick et al., 2004 and current velocity References for Appendix S1 Anderson, M.J. & Millar, R.B. (2004) Spatial variation and effects of habitat on temperate reef fish assemblages in northeastern New Zealand. Journal of Experimental Marine Biology and Ecology, 305,191-221. Brook, F.J. (2002) Biogeography of near-shore reef fishes in northern New Zealand. Journal of the Royal Society of New Zealand, 32,243-274. Caley, M.J. & St John, J. (1996) Refuge availability structures assemblages of tropical reef fishes. Journal of Animal Ecology, 65,414-428. Carr, M.H. (1991) Habitat selection and recruitment of an assemblage of temperate zone reef fishes. Journal of Experimental Marine Biology and Ecology, 146,113-137. Choat, J.H. & Ayling, A.M. (1987) The relationship between habitat structure and fish faunas on New Zealand reefs. Journal of Experimental Marine Biology and Ecology, 110,257-284. Connell, S.D. & Lincoln-Smith, M.P. (1999) Depth and the structure of assemblages of demersal fish: experimental trawling along a temperate coast. Estuarine, Coastal and Shelf Science, 48,483-495. Curley, B.G., Kingsford M.J. & Gillanders B.M. (2002) Spatial and habitat-related patterns of temperate reef fish assemblages: implications for the design of Marine Protected Areas. Marine and Freshwater Research, 53,1197-1210. Dean T.A., Haldorson, L., Laur, D.R., Jewett, S.C. & Blanchard, A. (2000) The distribution of nearshore fishes in kelp and eelgrass communities in Prince William Sound, Alaska: associations with vegetation and physical habitat characteristics. Environmental Biology of Fishes, 57, 271-287. Friedlander, A.M. & Parrish, J.D. (1998) Habitat characteristics affecting fish assemblages on a Hawaiian coral reef. Journal of Experimental Marine Biology and Ecology, 224, 1-30. Fulton, C.J. & Bellwood, D.R. (2004) Wave exposure, swimming performance, and the structure of tropical and temperate reef fish assemblages. Marine Biology, 144, 429-437. Harman N., Harvey, E.S. & Kendrick, G. A. (2003) Differences in fish assemblages from different reef habitats at Hamelin Bay, south-western Australia. Marine and Freshwater Research, 54,177-184. Hixon, M.A. & Beets, J.P. (1993) Predation, prey refuges, and the structure of coral-reef fish assemblages. Ecological Monographs, 63, 77-101. Holbrook, S.J., Forrester G.E. & Schmitt, R.J. (2000) Spatial patterns in abundance of a damsel fish reflect availability of suitable habitat. Oecologia, 122, 109-120. Holbrook, S.J., Schmitt, R.J. & Ambrose, R.F. (1990) Biogenic habitat structure and characteristics of temperate reef fish assemblages. Australian Journal of Ecology, 15, 489 - 503. Hyndes, G.A., Platell, M.E., Potter, I.C. & Lenanton, R.C.J. (1999) Does the composition of the demersal fish assemblages in temperate coastal waters change with depth and undergo consistent seasonal changes? Marine Biology, 134, 335-352. Jenkins, G.P. & Wheatley, M.J. (1998) The influence of habitat structure on nearshore fish assemblages in a southern Australian embayment: comparison of shallow seagrass, reef-algal and unvegetated sand habitats, with emphasis on their importance to recruitment. Journal of Experimental Marine Biology and Ecology, 221, 147-172. Jones, G.P. (1988) Ecology of rocky reef fish of north-eastern New Zealand: a review. New Zealand Journal of Marine and Freshwater Research, 22, 445-462. Lecchini, D., Adjeroud, M., Pratchett, M.S., Cadoret, L. & Galzin, R. (2003) Spatial structure of coral reef fish communities in the Ryukyu Islands, southern Japan. Oceanologica Acta, 26, 537-547. Leum, L.L. & Choat, J.H. (1980) Density and distribution patterns of temperate marine fish Cheilodactylus spectabilis (Cheiladactylidae) in a reef environment. Marine Biology, 57, 327-337. Levin, P.S. & Hay, M.E. (1996) Response of temperate reef fishes to alterations in algal structure and species composition. Marine Ecology Progress Series, 134, 37-47. McClanahan, T.R. & Arthur, R. (2001) The effect of marine reserves and habitat on populations of east African coral reef fishes. Ecological Applications, 11, 559569. Meekan, M.G. & Choat, J.H. (1997) Latitudinal variation in abundance of herbivorous fishes: a comparison of temperate and tropical reef fishes. Marine Biology, 128, 373-383. Pittman, S. J., Christensen, J. D., Caldow, C., Menza, C. & Monaco, M.E. (2007) Predictive mapping of fish species richness across shallow-water seascapes in the Caribbean. Ecological Modelling, 204, 9-21. Roberts, C.M. & Ormond, R.F.G. (1987) Habitat complexity and coral reef fish diversity and abundance on Red Sea fringing reefs. Marine Ecology Progress Series, 41, 1-8. Schick, R.S., Goldstein, J. & Lutcavage, M.E. (2004) Bluefin tuna (Thunnus thynnus) distribution in relation to sea surface temperature fronts in the Gulf of Maine (1994-96). Fisheries Oceanography, 13, 225-238. Steele, M.A. (1999) Effects of shelter and predators on reef fishes. Journal of Experimental Marine Biology and Ecology, 233, 65-79.