Infaunal biodiversity patterns from Carnarvon Shelf (Ningaloo Reef), Western Australia

A study of the Ningaloo Coast, Western Australia, reveals that infaunal assemblages—burrowing organisms crucial to ecological processes—dominate both species richness (67%) and abundance (78%) in soft-sediment habitats adjacent to Ningaloo Reef. Rare species, defined as those with two or fewer individuals recorded, constituted 42% of the total assemblage, highlighting significant biodiversity even at low population levels. The research, conducted across three areas (Mandu, Point Cloates, and Gnaraloo), found distinct infaunal communities in each location, with the southernmost area (Gnaraloo) showing the most pronounced differences. While depth and sediment composition (mud and gravel) influenced assemblage structure, these relationships were weak. The findings provide critical baseline data for assessing the effectiveness of marine protected areas, particularly in soft-sediment habitats, which are often overlooked in biodiversity assessments.

Przeslawski, R., McArthur, M. A., & Anderson, T. J. (2013). Infaunal biodiversity patterns from Carnarvon Shelf (Ningaloo Reef), Western Australia. Marine and Freshwater Research, 64(6), 573–583. https://doi.org/10.1071/mf12240