5 | Conclusion
We collected zooplankton community samples from the coral reef of an oceanic island and performed metatranscriptome analyses. We found higher similarity of OTU compositions in smaller- and lower similarity in larger-size zooplankton community samples. Daytime and nighttime samples were mixed in smaller- but separated in larger samples in nMDS analyses. Furthermore, the effective number of communities increased toward larger- and decreased toward smaller-size community samples. These results indicated a shift in the role of dispersal through size. We argue that metatranscriptomics is a promising platform for future large-scale monitoring and detection of temporal and spatial compositional changes.