Naslov
Effects of sequential pulsed isoproturon exposures on the growth of Lemna minor

Autori
Moslavac, Marko

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

Izvornik
The Book of Abstracts and Programme of 8th International Symposium of Ecologists of Montenegro / Pešić, Vladimir - Podgorica : Institute for Biodiversity and Ecology, 2019, 130-130

ISBN
978-86-908743-8-5

Skup
8th International Symposium of Ecologists of Montenegro (ISEM8)

Mjesto i datum
Budva, Crna Gora, 02.10.2019. - 05.10.2019

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

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

Sažetak
Many toxicants are released into aquatic ecosystems alternately in a series of pulses, which vary considerably in both timing and magnitude. Therefore, aquatic non-target species are typically exposed to fluctuating concentrations of contaminants. Ecotoxicity tests employ continuous exposure conditions with defined durations. Consequently, these approaches may not realistically reflect the impacts of certain toxicant. To assess the effects of repeated pulsed exposures to the herbicide isoproturon, duckweed (Lemna minor) was subjected to two sequential pulsed exposure scenarios. The influence of isoproturon on the growth rate and recovery potential over a 14- day period was investigated. In the first scenario, plants were exposed to 48 h pulses at four nominal concentrations (50, 100, 150 and 200 μg L-1), each followed by a recovery period of 5 days, whereas the second scenario consisted of 72 h pulses, alternating with 4 day recovery period. Complete recovery of duckweeds treated in two 48 h pulses with 50 and 100 μg L-1 of herbicide was achieved within 14 days. Additionally, only a slight growth recovery was recorded in lower 72 h pulse concentrations. Investigations on the effects of pulsed exposures parallel with standard ecotoxicity tests, can contribute to a more accurate environmental impact assessment.

Izvorni jezik
Engleski

Znanstvena područja
Biologija

POVEZANOST RADA