Abstract
BACTERIAL CELL WALL PRESERVATION DURING ORGANIC MATTER DIAGENESIS IN SEDIMENTS OFF PERU
The spatial distribution of total hydrolysable amino acids, total hydrolysable amino sugars and amino acid enantiomers (D- and L-forms) were investigated in surface sediments at 20 stations in the Peru margin: 9°45 S - 13º32 S. The objective of this study was to assess the preservation of bacterial cell walls during diagenesis of organic matter. Bacterial cell walls were traced by analysis of biomarkers uniquely produced by bacteria (D-amino acids and muramic acid). The diagenetic status of the sediments was evaluated from the percentage of carbon and nitrogen present as amino acid carbon and nitrogen, the ratio between protein precursors and their non-protein degradation products, compositional changes in the amino acid spectra and the percentage of carbon and nitrogen present as amino sugar carbon and nitrogen. The study clearly demonstrated a strong bacterial imprint in organic matter during early diagenesis. Hence, the key players in organic matter mineralization became an increasingly import component of refractory organic matter with ongoing degradation.
Session #:053
Date: 01-27-09
Time: 11:00
Presentation is given by student: No
The spatial distribution of total hydrolysable amino acids, total hydrolysable amino sugars and amino acid enantiomers (D- and L-forms) were investigated in surface sediments at 20 stations in the Peru margin: 9°45 S - 13º32 S. The objective of this study was to assess the preservation of bacterial cell walls during diagenesis of organic matter. Bacterial cell walls were traced by analysis of biomarkers uniquely produced by bacteria (D-amino acids and muramic acid). The diagenetic status of the sediments was evaluated from the percentage of carbon and nitrogen present as amino acid carbon and nitrogen, the ratio between protein precursors and their non-protein degradation products, compositional changes in the amino acid spectra and the percentage of carbon and nitrogen present as amino sugar carbon and nitrogen. The study clearly demonstrated a strong bacterial imprint in organic matter during early diagenesis. Hence, the key players in organic matter mineralization became an increasingly import component of refractory organic matter with ongoing degradation.
Session #:053
Date: 01-27-09
Time: 11:00
Presentation is given by student: No
| Originalsprog | Engelsk |
|---|---|
| Publikationsdato | 2009 |
| Status | Udgivet - 2009 |
| Begivenhed | ASLO Aquatic Sciences Meeting 2009: a cruise through Nice Waters - Nice, Frankrig Varighed: 17 dec. 2010 → … |
Konference
| Konference | ASLO Aquatic Sciences Meeting 2009: a cruise through Nice Waters |
|---|---|
| Land/Område | Frankrig |
| By | Nice |
| Periode | 17/12/2010 → … |