IMIS | Flanders Marine Institute

Flanders Marine Institute

Platform for marine research


Publications | Institutes | Persons | Datasets | Projects | Maps
[ report an error in this record ]basket (0): add | show Printer-friendly version

Effects of the herbicide 2,4-D on the growth of nine aquatic macrophytes
Belgers, J.D.M.; Van Lieverloo, R.J.; Van der Pas, L.J.T.; Van den Brink, P.J. (2007). Effects of the herbicide 2,4-D on the growth of nine aquatic macrophytes. Aquat. Bot. 86(3): 260-268.
In: Aquatic Botany. Elsevier Science: Tokyo; Oxford; New York; London; Amsterdam. ISSN 0304-3770, more
Peer reviewed article  

Available in  Authors 

    Aquatic plants; Herbicides; Hormesis; Risk assessment; Risk assessment; Risk assessment; Risks; Marine; Brackish water; Fresh water

Authors  Top 
  • Belgers, J.D.M.
  • Van Lieverloo, R.J.
  • Van der Pas, L.J.T.
  • Van den Brink, P.J.

    A study was conducted to determine the effect of the herbicide 2,4-dichlorophenoxyacetic acid (2,4-D) on nine submersed macrophyte species. The first objective of the study was to investigate the sensitivity of various endpoints in macrophyte toxicity tests. A second objective was to investigate the implications of hormesis in the risk assessment of 2,4-D. 2,4-D was applied in concentrations ranging from 10 to 3000 μg L−1. Endpoints determined 4 weeks after the start of the treatment were based on shoot and root growth in water. The EC50s were calculated using models excluding and including a parameter describing hormesis. Results indicated that the total length of the roots can be regarded as a sensitive endpoint for the response of a macrophyte to 2,4-D. For the tested rooted macrophyte species, the EC50 values for the length and number of the roots ranged from 92 to 997 and from 112 to 1807 μg L−1, respectively. At low concentrations (10 and 30 μg L−1), stimulation of some of the endpoints (hormesis) was found for several of the species. Although hormesis may have ecological implications, its importance for the ecological risk assessment of 2,4-D in this study was limited.

All data in IMIS is subject to the VLIZ privacy policy Top | Authors