| Autor: |
Sinninghe Damsté, J.S., Pancost, R.D., Baas, M., Geel, B. van |
| Jazyk: |
angličtina |
| Rok vydání: |
2002 |
| Předmět: |
|
| Zdroj: |
Organic Geochemistry, 33(7), 675. Elsevier |
| ISSN: |
0146-6380 |
| Popis: |
Lipid distributions in modern peat-forming plants were determined and compared to biomarkers recovered from a ca. 2800 year old peat deposited in a Dutch ombrotrophic bog. The peat section spans a well-constrained shift in local hydrology and vegetation, and potential molecular proxies for plant inputs were directly tested against the macrofossil record. Based on the analyses of modern plants, low-molecular-weight (LMW) n-alkanes (C23, C25) and high-molecular-weight n-alkanes (C33) are proposed as potential biomarkers for Sphagnum and non-Sphagnum inputs, respectively. Consistent with this, in the Bargerveen peat core, LMW n-alkane abundances increase and HMW n-alkane abundances decrease coincident with the shift to Sphagnum dominated peat. Additional potential proxies include the abundances of C22 ,-alkanedioic acid and phytenyl phytenoate as Sphagnum indicators and the abundances of the triterpenoids taraxer-14-ene and taraxast-20-ene as biomarkers for Ericaceae rootlets. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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