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Het OWA, het open archief van het Waterbouwkundig Laboratorium heeft tot doel alle vrij toegankelijke onderzoeksresultaten van dit instituut in digitale vorm aan te bieden. Op die manier wil het de zichtbaarheid, verspreiding en gebruik van deze onderzoeksresultaten, alsook de wetenschappelijke communicatie maximaal bevorderen.
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Sclerosponges as a new potential recorder of environmental changes: Lead in Ceratoporella nicholsoni
Lazareth, C.; Willenz, P.; Navez, J.; Keppens, E.; Dehairs, F.A.; André, L. (2000). Sclerosponges as a new potential recorder of environmental changes: Lead in Ceratoporella nicholsoni. Geology (Boulder Colo.) 28(6): 515-518. dx.doi.org/10.1130/0091-7613(2000)28<515:SAANPR>2.0.CO;2
In: Geology. Geological Society of America: Boulder. ISSN 0091-7613; e-ISSN 1943-2682, meer
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| Author keywords |
coralline sponge; lead; global change; LA-ICP-MS; carbonate |
| Abstract |
Lead concentrations have been analyzed on a 223 yr profile through the aragonitic skeleton of the reef-building Caribbean sclerosponge Ceratoporella nicholsoni by using laser-ablation inductively coupled plasma-mass spectrometry. A parallel study of the delta(13)C distribution in the skeleton validates the previously established mean annual growth rate of 230 mu m/yr, at least for long-term important environmental changes. The Pb trend in the specimen displays a general increase from 0.30 ppm ca. A.D. 1760 to 2.15 ppm ca. A.D. 1984; a major threefold increase occurred after 1930. This Pb profile is analogous to results acquired from ice or coral cores and clearly highlights the potential of sclerosponges as a new proxy of environmental changes for time series extending over several centuries. |
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