Articles | Volume 12, issue 20
Biogeosciences, 12, 6219–6234, 2015
https://doi.org/10.5194/bg-12-6219-2015

Special issue: Low oxygen environments in marine, fresh and estuarine...

Biogeosciences, 12, 6219–6234, 2015
https://doi.org/10.5194/bg-12-6219-2015

Research article 29 Oct 2015

Research article | 29 Oct 2015

Two-dimensional distribution of living benthic foraminifera in anoxic sediment layers of an estuarine mudflat (Loire estuary, France)

A. Thibault de Chanvalon et al.

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Short summary
We present a new rapid and accurate protocol to simultaneously sample, in two dimensions, benthic living foraminifera at the centimetre scale and dissolved iron and phosphorus at the submillimetre scale. It was applied to a highly bioturbated site in a mudflat of the Loire estuary and showed that, in the suboxic zone, foraminifera are less affected by active burrows (i.e. reoxygenated) than by iron reactive hotspots. This unexpected result calls for a generalization of this new protocol.
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