Structure of Fish Communities on Outer Slopes of Inshore, Mid-Shelf and Outer Shelf Reefs of the Great Barrier Reef
- 1 January 1983
- journal article
- research article
- Published by Inter-Research Science Center in Marine Ecology Progress Series
- Vol. 10 (3), 239-250
- https://doi.org/10.3354/meps010239
Abstract
The structure of fish communities on the outer reef slopes of 1 inshore, 1 mid-shelf and 1 outer shelf reef in the central region of the Great Barrier Reef was examined using small, quantitative explosive charges. Ten collections, each covering .apprx. 150 m2 of reef surface, were made on each reef. A total of 323 spp. belonging to 46 families and comprising 28,537 individuals were collected. Species composition of the communities differed greatly among the 3 reefs. Most species were collected on only 1 or 2 of the 3 reefs. Species richness (number of species per unit area) was greatest on the mid-shelf, lowest inshore and of an intermediate value on the outer shelf reef. The evenness component of species diversity increased across the shelf from inshore to mid-shelf to outer shelf reefs. The biomass of different trophic categories and overall trophic structure differed considerably among the reefs. The most notable differences were the lower biomass of algal grazers on the inshore reef than elsewhere and the considerably greater biomass of planktivores on the mid-shelf reef than elsewhere. Within these major trophic categories and their guilds, there was considerable variation in the distribution of major taxa among the 3 reefs. A number of possible mechanisms causing and maintaining the differences in community structure across the continental shelf are discussed.This publication has 6 references indexed in Scilit:
- Upwelling as a Source of Nutrients for the Great Barrier Reef Ecosystems: A Solution to Darwin's Question?Marine Ecology Progress Series, 1982
- The Community Structure of Coral Reef FishesThe American Naturalist, 1981
- Similarity and Diversity Among Coral Reef Fish Communities: A Comparison between Tropical Western Atlantic (Virgin Islands) and Tropical Central Pacific (Marshall Islands) Patch ReefsEcology, 1980
- Components of Avian Diversity Along a Multifactorial GardientEcology, 1978
- The Niche Exploitation Pattern of the Blue‐Gray GnatcatcherEcological Monographs, 1967
- Energy Transformations by a Population of Fish in the River ThamesJournal of Animal Ecology, 1965