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| Titel |
Bioerosion by microbial euendoliths in benthic foraminifera from heavy metal-polluted coastal environments of Portovesme (south-western Sardinia, Italy) |
| VerfasserIn |
A. Cherchi, C. Buosi, P. Zuddas, G. Giudici |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1726-4170
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| Digitales Dokument |
URL |
| Erschienen |
In: Biogeosciences ; 9, no. 11 ; Nr. 9, no. 11 (2012-11-20), S.4607-4620 |
| Datensatznummer |
250007399
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| Publikation (Nr.) |
 copernicus.org/bg-9-4607-2012.pdf |
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| Zusammenfassung |
| A monitoring survey of the coastal area facing the
industrial area of Portoscuso-Portovesme (south-western Sardinia, Italy)
revealed intense bioerosional processes. Benthic foraminifera collected at
the same depth (about 2 m) but at different distances from the pollution
source show extensive microbial infestation, anomalous Mg/Ca molar ratios
and high levels of heavy metals in the shell associated with a decrease in
foraminifera richness, population density and biodiversity with the presence
of morphologically abnormal specimens. We found that carbonate dissolution
induced by euendoliths is selective, depending on the Mg content and
morpho-structural types of foraminiferal taxa. This study provides evidences
for a connection between heavy metal dispersion, decrease in pH of the
sea-water and bioerosional processes on foraminifera. |
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