Naslov
Growth rate inhibition and recovery potential of Lemna minor after pulsed isoproturon exposures

Autori
Moslavac, Marko

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
SEFS11 Abstract book / Sertić Perić, Mirela ; Miliša, Marko ; Gračan, Romana ; Ivković, Marija ; Buj, Ivana ; Mičetić Stanković, Vlatka - Zagreb : Hrvatsko udruženje slatkovodnih ekologa (HUSEk), 2019, 444-444

Skup
11th Symposium for European Freshwater Sciences (SEFS11)

Mjesto i datum
Zagreb, Hrvatska, 30.06.2019. - 05.07.2019

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Isoproturon ; Pulsed exposures ; Growth inhibition ; Recovery potential ; Lemna minor

Sažetak
In aquatic ecosystems, concentrations of pesticides can increase remarkably during spray drift, surface runoff events and precipitations, resulting in repeated pulses and fluctuating pesticide concentrations. Following such exposures, non-target aquatic organisms may recover. Nonetheless, the effects of repeated pulsed exposures are not adequately covered by the standardized laboratory toxicity tests, since these aim at maintaining continuous exposure regimes, as well as constant concentrations of the xenobiotic, and commonly do not investigate the toxicity of pulsed exposures. Therefore, the objective of the present study was to investigate the effects of isoproturon on the growth rate, as well as the recovery potential of aquatic macrophyte Lemna minor over a 14-day period after 72 h of pulse treatment. Isoproturon belongs to the class of phenylurea herbicides, and it is extensively used in conventional agriculture for the control of pre-emergent and early post-emergent grass and dicot weeds in several different crops. Common duckweed plants were treated with 0.05, 0.1, 0.15 and 0.2 mg L- 1 of herbicide in nutrient solution. In both 72 h pulse treatments with 0.05 mg L-1 of isoproturon, a slight recovery was reached within 14 days. However, recovery of plants treated with 0.1, 0.15 and 0.2 mg L-1 of herbicide was not achieved during the experiment. The results from this study imply that recovery is possible for non-target aquatic macrophytes. It is crucial to simulate these types of experimental scenarios in order to improve the ecological risk assessment of pesticide pulse exposures.

Izvorni jezik
Engleski

Znanstvena područja
Biologija

POVEZANOST RADA