Monitoring invertebrate communities, aquatic plants, riparian vegetation and habitat conditions is undertaken at several different monitoring sites. Each site is surveyed twice a year; once in spring and once in summer.


There are a number of reasons for collecting information about the Styx River and its tributaries. These include:

  • To monitor habitat, aquatic plants and invertebrate communities over time.
  • To ascertain if there are any trends between changes in habitat and changes in invertebrate communities over a period of time.
  • To compare invertebrate communities in the Styx with invertebrate communities in other catchments within the Canterbury region.
  • To improve understanding of the current state of the in-stream habitat and invertebrate communities.

Monitoring Sites

Data collected at each site includes: