• Question: How much percentage of the underwater wildlife have been affected by pollution?

    Asked by SanjayA to Alistair on 2 Feb 2021.
    • Photo: Alistair Young

      Alistair Young answered on 2 Feb 2021:

      All the life in the river has been impacted in some way as the pollution changes the environment – for example fertiliser in run-off from a farm will add nitrogen to the water, encouraging algae to grow which chokes off other plant forms and adds shade… so the invertebrates and mini-bugs struggle to survive… and fish and other creatures which feed on the invertebrates also suffer… so on up the food chain