Not logged in
Data Publisher for Earth & Environmental Science

Holstein, Jan M; Hensen, Christian (2010): Oxygen and silica flux from 9 multicorer profiles. doi:10.1594/PANGAEA.788575,
Supplement to: Holstein, JM; Hensen, C (2010): Microbial mediation of benthic biogenic silica dissolution. Geo-Marine Letters, 30(5), 477-492, doi:10.1007/s00367-009-0181-3

Always quote above citation when using data! You can download the citation in several formats below.

RIS CitationBibTeX CitationShow MapGoogle Earth

Pore water profiles from 24 stations in the South Atlantic (located in the Guinea, Angola, Cape, Guyana, and Argentine basins) show good correlations of oxygen and silicon, suggesting microbially mediated dissolution of biogenic silica. We used simple analytical transport and reaction models to show the tight coupling of the reconstructed process kinetics of aerobic respiration and silicon regeneration. A generic transport and reaction model successfully reproduced the majority of Si pore water profiles from aerobic respiration rates, confirming that the dissolution of biogenic silica (BSi) occurs proportionally to O2 consumption. Possibly limited to well-oxygenated sediments poor in BSi, benthic Si fluxes can be inferred from O2 uptake with satisfactory accuracy. Compared to aerobic respiration kinetics, the solubility of BSi emerged as a less influential parameter for silicon regeneration. Understanding the role of bacteria for silicon regeneration requires further investigations, some of which are outlined. The proposed aerobic respiration control of benthic silicon cycling is suitable for benthic-pelagic models. The empirical relation of BSi dissolution to aerobic respiration can be used for regionalization assessments and estimates of the silicon budget to increase the understanding of global primary and export production patterns.
Median Latitude: -19.092438 * Median Longitude: -18.883166 * South-bound Latitude: -34.526200 * West-bound Longitude: -51.442800 * North-bound Latitude: 2.680000 * East-bound Longitude: 13.073333
Date/Time Start: 1996-02-02T00:00:00 * Date/Time End: 1999-12-13T18:44:00
2 datasets

Download Data

Download ZIP file containing all datasets as tab-delimited text (use the following character encoding: )