Levels and Trophic Transfer of Selected Pesticides in the Lake Ziway Ecosystem.

Autor: Mergia MT; Department of Biology, Hawassa University, P.O.Box 05, Hawassa, Ethiopia. mekuriamergia@gmail.com., Weldemariam ED; Kotebe Metropolitan University (KMU), Addis Ababa, Ethiopia., Eklo OM; Norwegian University of Life Science (NMBU), Ås, Norway., Yimer GT; Department of Biology, Hawassa University, P.O.Box 05, Hawassa, Ethiopia.
Jazyk: angličtina
Zdroj: Bulletin of environmental contamination and toxicology [Bull Environ Contam Toxicol] 2022 May; Vol. 108 (5), pp. 830-838. Date of Electronic Publication: 2022 Mar 22.
DOI: 10.1007/s00128-022-03497-4
Abstrakt: The levels of 30 selected pesticides and trophic biomagnification of DDT were investigated in biota samples of the Lake Ziway in the Rift valley region, Ethiopia. Carbon source and trophic position were calculated by using 13 C and 15 N stable isotopes, individually, and trophic magnification factors (TMFs) were inferred. Only DDT and its metabolites were quantified in all samples analyzed. The most prominent metabolite was p,p'-DDE with mean concentration ranging from the 0.82-33.69 ng g -1 lipid weight. Moreover, the ratio of DDT/DDD + DDE in all the biota samples was less than 1 signifying historical DDT application. Regression of log [ΣDDT] vs TL (trophic level) among all biota species showed a significant correlation, indicating that DDTs are biomagnifying along with the food web of Lake Ziway with an estimated TMF of 2.75. The concentrations of DDTs and other organochlorine pesticides found in biota from Lake Ziway were, in general, lower than studies found in previous studies carried out in the same lake.
(© 2022. The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature.)
Databáze: MEDLINE
Externí odkaz: