Cryptofauna of the epilithic algal matrix on an inshore coral reef, Great Barrier Reef
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Composed of a collection of algae, detritus, sediment and invertebrates, the epilithic algal matrix (EAM) is an abundant and ubiquitous feature of coral reefs. Despite its prevalence, there is a paucity of information regarding its associated invertebrate fauna. The cryptofaunal invertebrate community of the EAM was quantitatively investigated in Pioneer Bay on Orpheus Island, Great Barrier Reef. Using a vacuum collection method, a diversity of organisms representing 10 different phyla were identified. Crustacea dominated the samples, with harpacticoid copepods being particularly abundant (2025 ± 132 100 cm−2; mean density ± SE). The volume of coarse particulate matter in the EAM was strongly correlated with the abundance of harpacticoid copepods. The estimated biomass of harpacticoid copepods (0.48 ± 0.05 g m−2; wet weight) suggests that this group is likely to be important for reef trophodynamics and nutrient cycling.
KeywordsCrustacea Harpacticoid copepods Trophodynamics Turf algae Benthic community
We wish to thank S Leahy, C Lefévre, J Welsh and staff of Orpheus Island Research Station for their support in the field; J Kidgell, J Leonhardt, J Levy, T Sih, K Stegemann and J Welsh for their valuable assistance in processing samples; J Tanner for comments and criticisms on final drafts of the manuscript; and five anonymous reviewers for their helpful suggestions. This work was supported by the Australian Research Council (D.R.B.).
- Bonaldo R, Bellwood D (2011) Spatial variation in the effects of grazing on epilithic algal turfs on the Great Barrier Reef, Australia. Coral Reefs 30:381–390Google Scholar
- Calder WA (1984) Size, function and life history. Harvard University Press, CambridgeGoogle Scholar
- Enochs IC, Manzello DP (2012) Species richness of motile cryptofauna across a gradient of framework erosion. Coral Reefs doi: 10.1007/s00338-012-0886-z
- Purcell SW (1996) A direct method for assessing sediment load in epilithic algal communities. Coral Reefs 15:211–213Google Scholar
- Wilson SK, Bellwood DR, Choat JH, Furnas MJ (2003) Detritus in the epilithic algal matrix and its use by coral reef fishes Oceanogr Mar Biol Annu Rev 41:279–309Google Scholar