Abstract:
:Benthic foraminiferal assemblages were investigated from two sites along the axis of the Cassidaigne Canyon (NW Mediterranean Sea). Both areas are contaminated by bauxite red mud enriched in iron, titanium, vanadium and chromium. These elemental enrichments are related to bauxite-derived minerals and various amorphous phases. At the shallowest station located very close to the pipe outlet, the benthic living foraminiferal community is characterised by a very low diversity and by an unusual dominance of Gyroidina umbonata and Bulimina marginata. The mechanical stress related to downslope transport of red mud is a likely source of hydro-sedimentary pollution precluding the settlement of diverse fauna. The living and dead foraminiferal faunas from the deepest site are typical of oligo-mesotrophic conditions prevailing in natural environments. There, bauxite residues have obviously no environmental impact on foraminiferal faunas. The bioavailability of trace metals is likely low as elemental enrichments were not observed in foraminiferal test chemistry.
journal_name
Mar Pollut Bulljournal_title
Marine pollution bulletinauthors
Fontanier C,Fabri MC,Buscail R,Biscara L,Koho K,Reichart GJ,Cossa D,Galaup S,Chabaud G,Pigot Ldoi
10.1016/j.marpolbul.2012.06.016subject
Has Abstractpub_date
2012-09-01 00:00:00pages
1895-910issue
9eissn
0025-326Xissn
1879-3363pii
S0025-326X(12)00277-9journal_volume
64pub_type
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pub_type: 杂志文章
doi:10.1016/j.marpolbul.2012.09.017
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