The Great Barrier reef is a marine coral ecosystem, so no real soil. However, there will be a lot of loose carbonate mud from the breakup of coral and other shell debris, and from the grazing of parrotfish and the like. Carbonate mud is like soil, just made up of calcite particles. This is derived from the break up of coralline algae, and faecal pellets of grazing organisms, and the abrasion of debris, and even in living reefs can make up a large proportion of the reef. The carbonate mud will be inhabited by burrowing organisms.
Neodymium and strontium isotopic systematics show that terrestrial phosphorus (P) entering the inner Great Barrier Reef (GBR) is dominated by the transport and dispersal of fine-grained basaltic soils. Soils derived from alkali basalts and Palaeozoic granitic/metamorphic soils. The near shore environment is dominated by coarse-grained, granitic-derived fluvial detritus. It is shown that basalt-derived sediments can account for less than90% of the terrestrial Phosphorous, although making up less than half of the total terrigenous detritus.
Neodymium and strontium isotopic systematics show that terrestrial phosphorus (P) entering the inner Great Barrier Reef (GBR) is dominated by the transport and dispersal of fine-grained basaltic soils. Soils derived from alkali basalts and Palaeozoic granitic/metamorphic soils. The near shore environment is dominated by coarse-grained, granitic-derived fluvial detritus. It is shown that basalt-derived sediments can account for less than90% of the terrestrial Phosphorous, although making up less than half of the total terrigenous detritus.