Mallon, Jürgen, Glock, Nicolaas and Schönfeld, Joachim (2012) The response of benthic Foraminifera to low-oxygen conditions of the Peruvian oxygen minimum zone. In: ANOXIA : Evidence for Eukaryote Survival and Paleontological Strategies. , ed. by Altenbach, Alexander V., Bernhard, Joan M. and Seckbach, Joseph. Cellular Origin, Life in Extreme Habitats and Astrobiology, 21 . Springer, Dordrecht, The Netherlands, pp. 305-322. ISBN 978-94-007-1895-1 DOI 10.1007/978-94-007-1896-8_16.

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Abstract

Recent benthic foraminifera and their distribution in surface sediments were studied on a transect through the Peruvian oxygen minimum zone (OMZ) between 10 and 12°S.
The OMZ with its steep gradients of oxygen concentrations allows to determine the
oxygen-dependent changes of species compositions in a relatively small area. Our
results from sediments of thirteen multicorer stations from 79 to 823 m water depth
demonstrate that calcareous species, especially bolivinids dominate the assemblages
throughout the OMZ. The depth distribution of several species matches distinct ranges
of bottom water oxygen levels. The distribution pattern inferred a proxy which allows to
estimate dissolved oxygen concentrations for reconstructing oxygen levels in the
geological past.

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