Marine Debris Harbor Unique, yet Functionally Similar Cryptofauna Communities.

This article examines the differences in cryptofauna—small, often hidden marine invertebrates critical to coral reef ecosystems—inhabiting natural reef structures versus anthropogenic marine debris in the middle Florida Keys reef tract. Using autonomous reef monitoring structures (ARMS) as proxies for natural reef habitat, the study found that marine debris, predominantly plastic and fishing gear-related materials, supports cryptofauna communities that are taxonomically diverse but functionally specialized compared to those on natural substrates. While both habitats host taxa with net-positive or neutral effects on reef health, debris communities exhibited higher evenness and distinct taxa compositions, including some early coral settlers, suggesting marine debris can serve as novel habitats. These findings highlight the ecological complexity of marine debris and underscore the need for debris management strategies that consider the associated cryptofauna to better support reef conservation efforts.