How to facilitate freshwater macroinvertebrate reintroduction?

Reintroduction is a common conservation strategy although rarely conducted in freshwater ecosystems. We present a reintroduction approach for freshwater invertebrates. Different natural substrates and exposure times were tested for presence and abundance of stream type specific macroinvertebrates. Wood leaf mixture demonstrated statistically significant highest mean abundances compared to other substrates. Moreover, they displayed comparatively high mean numbers when exposed for six weeks. We thus propose a natural substrate exposure method for reintroduction of aquatic insects.