Macrobenthic fauna was sampled in inland waters with unstable environmental parameters in the SW Netherlands. The distribution of 23 species of aquatic oligochaetes was related to chlorinity. Oligochaetes and other macrofaunal taxa were grouped by cluster analysis. Brackish-marine oligochaetes appeared to have a similarly large tolerance for chlorinity variations, as is known for the better researched euryhaline macrofauna.
- brackish water
- cluster analysis