Fliessgewaessergefaehrdung durch Insektizide

1992

S. 437-442

18 Lit. Ang.

Unselbständiges Werk

200033440

Current spreads insecticides from the catchment in the water body of streams and removes the arthropods killed, i.e., half of the stream fauna. Biocenoses collapse. Stream recovery requires 1 year or more. Pollution of lower courses ecologically isolates near-to-natural upper runs, hindering recolonization; lasting reduction of the high natural biodiversity of these headwater refugia may soon occur.