Journal of Siberian Federal University. Biology: Some Peculiarities of Foraminifera Species Distribution Associated with Concentrations of ²²⁶Ra,²³⁸U, ²³²Th in the Deryugin Basin (the Sea of Okhotsk)

Journal of Siberian Federal University. Biology / Some Peculiarities of Foraminifera Species Distribution Associated with Concentrations of ²²⁶Ra,²³⁸U, ²³²Th in the Deryugin Basin (the Sea of Okhotsk)

Issue: Journal of Siberian Federal University. Biology. 2019 12 (2)
Authors: Domanov, Mikhail M.; Khusid, Tatyana A.
Contact information: Domanov, Mikhail M.: Shirshov Institute of Oceanology RAS 36 Nakhimovskii, Moscow, 117899, Russia; ; Khusid, Tatyana A.: Shirshov Institute of Oceanology RAS 36 Nakhimovskii, Moscow, 117899, Russia
Keywords: foraminifera; community of foraminifera; biocoenosis; radionuclides; ²³⁸U; ²³²Th; ²²⁶Ra; sediment; abundance; ²³⁸U; ²³²Th; ²²⁶Ra
Abstract: An analysis of composition and quantitative distribution of foraminifera in bottom sediments collected in the Deryugin Basin (the Sea of Okhotsk) has demonstrated that specific foraminiferal assemblages at the depths of 691 to 1786 m are associated with distribution of natural radionuclides. A comparison of the percentage of Saccorhiza ramosa (Brady) as a dominant species in the community of benthic foraminifera and the concentrations of radionuclides in the sediments showed that the quantity of S. ramosa correlates with the concentrations of 238U, 232Th and 226Ra in the sediments. The correlation coefficients for concentrations of 238U, 232Th and 226Ra are 0.75, 0.83 and 0.86, respectively. Calcareous foraminifera abundance decreases with radioactivity growth and correlates with common radioactivity with the negative coefficient of -0.82
Pages: 120-129
DOI: 10.17516/1997-1389-0063
Paper at repository of SibFU: https://elib.sfu-kras.ru/handle/2311/71738