The biomarker record of Lake Albano, central Italy—implications for Holocene aquatic system response to environmental change
| Autor: | Daniel Ariztegui, Sabine Hanisch, Wilhelm Püttmann |
|---|---|
| Rok vydání: | 2003 |
| Předmět: |
geography
geography.geographical_feature_category Environmental change Ecology Drainage basin Dinosterol chemistry.chemical_compound Water column chemistry Geochemistry and Petrology Paleoclimatology sense organs Physical geography skin and connective tissue diseases Quaternary Bioindicator Holocene Geology |
| Zdroj: | Organic Geochemistry. 34:1223-1235 |
| ISSN: | 0146-6380 |
| Popis: | A study of lipid biomarkers in predominantly laminated, organic carbon-rich sediments in Lake Albano (central Italy) has been used to reconstruct changes in the aquatic system variations and changes in the lake catchment area during the Holocene. Biomarkers of aquatic organic matter such as dinosterol, isoarborinol, tetrahymanol, diplopterol, and diploptene reflect two major changes in the mixing behaviour and the biological assemblages of Lake Albano at around 6.5 and 3.8 ky BP, respectively. Biomarkers for higher land plants such as friedelin, long-chain n -alkanes, β-amyrenone and α-amyrenone display different distribution patterns, indicating changes in the lake's catchment at 6.5 and 5.0 ky BP, resulting from soil erosion and changes in the local vegetation. Analogously, the recognised changes in the water column structure and biological components are coherent with previous reconstructions based on independent parameters. The new data highlight the importance of multiproxy studies to better characterize palaeoenvironmental changes that are in turn the first step towards elucidating their trigger mechanisms (i.e. climate vs. human-induced). |
| Databáze: | OpenAIRE |
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