WHAT THE EVIDENCE SAYS
Four seabed and midwater baited-camera surveys over five years recorded 297 taxa; 272 appeared in seabed samples and 47 in midwater. Both communities changed composition between surveys, but benthic abundance, biomass and body length were broadly stable while pelagic samples increasingly featured more small fish.
WHY IT MATTERS / OUR READ
Protected-area evaluation should repeat sampling of separate habitats, fish sizes and composition. A retained species list can coexist with meaningful structural ecological change.
CAVEATS / UNCERTAINTY
Baited-camera detectability and habitat coverage differ. Fishing pressure is suggested as a possible driver of midwater patterns but was not causally identified.
SOURCE
Clarke et al. · Marine Biodiversity · Shark Bay underwater camera series
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