RIVM logo, National Institute for Public Healthe and the Enviroment. Minsty of Health, Welfare and Sport

Hazardous Concentrations for Ecosystems (HCE): calculation with CATS models

'Hazardous Concentrations for Ecosystems' (HCE): berekening met CATS modellen

Synopsis

Dose-response functions were fitted on data from laboratory toxicity tests and were used to predict the response of functional groups in food webs. Direct effects of Chlorpyrifos (CPF), as observed in microcosm experiments, could be modelled adequately by incorporating dose-response functions in a CATS model. Indirect effects of CPF on functional groups, resulting from direct toxicity, could be predicted with the model too. The ecosystem response to toxicants was used to propose a quality standard called the Hazardous Concentration for Ecosystems (HCE). The HCE is based on both direct and indirect effects and is reached at a proposed 5% deviation of control biomass. The calculated HCEs for cadmium, Chlorpyrifos and DTDMAC are higher, but within two orders of magnitude of (proposed) Limit Values. The discrepancies are discussed.
 

Home / Documents and publications / Hazardous Concentrations for Ecosystems (HCE): calculation with CATS models

RIVM Committed to health and sustainability
Menu