Biomonitoring of radioactive contamination using benthic invertebrate communities in Manzala Lake, Egypt

• Autorzy: Imam Noha , Bendary Reda E.

Identyfikatory

DOI

10.26881/oahs-2023.2.02

• Języki publikacji: EN

Abstrakty

EN

Manzala Lake, the largest in Egypt’s Nile Delta, hassignificant human activity. The Lake’s ecological conditionhas recently been impacted by a significant increase inagricultural, industrial, and urban wastewater discharge. Avaluable tool for monitoring the water quality of ManzalaLake is the sensitivity of invertebrate species to varioustypes of pollution, such as radioactive contamination.Activity concentrations of radionuclides Radium-226 (226Ra),Thorium-232 (232Th), Potassium-40 ( 40K), and Caesium-137(137Cs) were measured in water, sediments and benthicinvertebrate samples in 2020. The benthic community’sspatial distribution and the radionuclides’ bioaccumulationwere evaluated to determine possible relationships.Thirty taxa of benthic invertebrates were recognised.The data illustrated that the mean activity concentrationof radionuclides in water was in the order of 40K > 232Th >226Ra > 137Cs, which changed into 40K > 226Ra > 232Th > 137Csin the sediment and benthic invertebrates. Gastropodaand Ostracoda are the dominating groups of benthos inthe lake and are related to the highest concentrations ofradionuclides. The benthos species with shells dominatedat the sites with the highest activity concentration of 226Ra,while soft-bodied organisms dominated in sites with thehighest average 137Cs activity in these samples.

Słowa kluczowe

EN

Manzala Lake; benthic invertebrate; radionuclides; concentration factor

• Wydawca: Institute of Oceanography University of Gdańsk
• Czasopismo: Oceanological and Hydrobiological Studies
• Rocznik: 2023
• Tom: Vol. 52, No. 2
• Strony: 147--165
• Opis fizyczny: Bibliogr. 83 poz., map., rys., tab., wykr.

Twórcy

autor

Imam Noha

• National Institute of Oceanography and Fisheries (NIOF), Physics and Geology Lab., Freshwater & Lakes Division, Cairo, Egypt

• https://orcid.org/0000-0001-5807-7009

autor

Bendary Reda E.

• National Institute of Oceanography and Fisheries (NIOF), Hydrobiology Lab., Freshwater& Lakes Division, Cairo, Egypt

• https://orcid.org/0000-0002-9161-2162

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Uwagi

Opracowanie rekordu ze środków MEiN, umowa nr SONP/SP/546092/2022 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2022-2023).