Test deformation and chemistry of foraminifera as response to anthropogenic heavy metal input.

Autor: Boehnert S; MARUM - Centre for Marine Environmental Sciences, University of Bremen, Leobener Straße 8, 28359 Bremen, Germany. Electronic address: sboehnert@marum.de., Birkelund AR; Department of Geosciences, University of Oslo, P.O. box 1028 Blindern, 0316 Oslo, Norway., Schmiedl G; Center for Earth System Research and Sustainability, Institute for Geology, University of Hamburg, Bundesstraße 55, 20146 Hamburg, Germany., Kuhnert H; MARUM - Centre for Marine Environmental Sciences, University of Bremen, Leobener Straße 8, 28359 Bremen, Germany., Kuhn G; Alfred-Wegener-Institut Helmholtz-Zentrum für Polar- und Meeresforschung, Am Alten Hafen 26, 27568 Bremerhaven, Germany., Hass HC; Alfred-Wegener-Institut Helmholtz-Zentrum für Polar- und Meeresforschung, Hafenstraße 43, 25992 List/Sylt, Germany., Hebbeln D; MARUM - Centre for Marine Environmental Sciences, University of Bremen, Leobener Straße 8, 28359 Bremen, Germany. Electronic address: dhebbeln@marum.de.
Jazyk: angličtina
Zdroj: Marine pollution bulletin [Mar Pollut Bull] 2020 Jun; Vol. 155, pp. 111112. Date of Electronic Publication: 2020 Apr 20.
DOI: 10.1016/j.marpolbul.2020.111112
Abstrakt: Benthic foraminifera are sensitive to environmental changes and widely used as tools to monitor pollution. Rising numbers of deformed tests are often used as indicator for elevated levels of heavy metals, but little is known about the relation between heavy metal incorporation into foraminiferal tests and the formation of test deformities. Here, two sediment cores from the south-eastern North Sea are compared, regarding the occurrence of deformed foraminiferal tests, foraminiferal test chemistry (ICP-MS) and bulk sediment Pb content (XRF). The total abundance of deformed foraminiferal tests seems not to align temporarily with historical heavy metal pollution. Therefore, we suggest that foraminifera react with test deformation to other environmental stressors than the studied heavy metals. Test chemistry reflects historical increased bulk sediment heavy metal content, despite a slight temporal offset. We propose that Pb (and Cd) are only incorporated into foraminiferal tests above a yet to be defined threshold of pollution.
Competing Interests: Declaration of competing interest None.
(Copyright © 2020 Elsevier Ltd. All rights reserved.)
Databáze: MEDLINE
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