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Küster-Heins, Kathrin; de Lange, Gert J; Zabel, Matthias (2010): Porewater and solid-phase phosphorus geochemistry in surface sediments of sediment core GeoB9510-3, GeoB9518-4 and GeoB9519-6 [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.736592

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Abstract:
Despite intensive research on the different domains of the marine phosphorus (P) cycle during the last decades, frequently discussed open questions still exist especially on controlling factors for the benthic behaviour of P and its general distribution in sediment-pore water systems. Steady state or the internal balance of all relevant physical and (bio)geochemical processes are amongst the key issues. In this study we present and discuss an extended data set from surface sediments recovered from three locations on the NW African continental slope. Pore water data and results from sequential sediment extractions give clear evidence to the well-known close relationship between the benthic cycles of P and iron. Accordingly, most of the dissolved phosphate must have been released by microbially catalyzed reductive dissolution of iron (oxhydr)oxides. However, rates of release and association of P and iron, respectively, are not directly represented in profiles of element specific sediment compositions. Results from steady-state based transport-reaction modelling suggest that particle mixing due to active bioturbation, or rather a physical net downward transport of P associated to iron (oxyhydr)oxides, is an essential process for the balance of the inspected benthic cycles. This study emphasizes the importance of balancing analytical data for a comprehensive understanding of all processes involved in biogeochemical cycles.
Related to:
Küster-Heins, Kathrin (2009): Geochemical conditions in condinental margin surface sediments: implications for distribution and cycling of phosphorus. PhD Thesis, Elektronische Dissertationen an der Staats- und Universitätsbibliothek Bremen, Germany, 128 pp, urn:nbn:de:gbv:46-diss000117353
Küster-Heins, Kathrin; de Lange, Gert J; Zabel, Matthias (2010): Benthic phosphorus and iron budgets for three NW African slope sediments: a balance approach. Biogeosciences, 7(2), 469-480, https://doi.org/10.5194/bg-7-469-2010
Project(s):
Center for Marine Environmental Sciences (MARUM)
Coverage:
Median Latitude: 14.205854 * Median Longitude: -17.715708 * South-bound Latitude: 13.792500 * West-bound Longitude: -17.790167 * North-bound Latitude: 15.416667 * East-bound Longitude: -17.653833
Date/Time Start: 2005-06-15T23:17:00 * Date/Time End: 2005-06-19T01:14:00
Event(s):
GeoB9510-3 (295) * Latitude: 15.416667 * Longitude: -17.653833 * Date/Time: 2005-06-15T23:17:00 * Elevation: -1567.0 m * Recovery: 0.38 m * Campaign: M65/1 * Basis: Meteor (1986) * Method/Device: MultiCorer (MUC) * Comment: 38 cm
GeoB9518-4 (303) * Latitude: 13.792500 * Longitude: -17.790167 * Date/Time: 2005-06-18T15:27:00 * Elevation: -1997.0 m * Campaign: M65/1 * Basis: Meteor (1986) * Method/Device: MultiCorer (MUC) * Comment: 37-40 cm
GeoB9519-6 (304) * Latitude: 13.812000 * Longitude: -17.682500 * Date/Time: 2005-06-19T01:14:00 * Elevation: -1488.0 m * Campaign: M65/1 * Basis: Meteor (1986) * Method/Device: MultiCorer (MUC) * Comment: 44-46 cm
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
8 datasets

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Datasets listed in this publication series

  1. Küster-Heins, K; de Lange, GJ; Zabel, M (2010): Solid-phase phosphorus geochemistry in surface sediments of sediment core GeoB9510-3. https://doi.org/10.1594/PANGAEA.736453
  2. Küster-Heins, K; de Lange, GJ; Zabel, M (2010): Porewater phosphorus geochemistry in surface sediments of sediment core GeoB9510-3. https://doi.org/10.1594/PANGAEA.736335
  3. Küster-Heins, K; de Lange, GJ; Zabel, M (2010): Solid-phase phosphorus geochemistry in surface sediments of sediment core GeoB9518-4. https://doi.org/10.1594/PANGAEA.736456
  4. Küster-Heins, K; de Lange, GJ; Zabel, M (2010): Porewater phosphorus geochemistry in surface sediments of sediment core GeoB9518-4 (rhizon samples). https://doi.org/10.1594/PANGAEA.736442
  5. Küster-Heins, K; de Lange, GJ; Zabel, M (2010): Porewater phosphorus geochemistry in surface sediments of sediment core GeoB9518-4 (squeezer samples). https://doi.org/10.1594/PANGAEA.736352
  6. Küster-Heins, K; de Lange, GJ; Zabel, M (2010): Solid-phase phosphorus geochemistry in surface sediments of sediment core GeoB9519-6. https://doi.org/10.1594/PANGAEA.736457
  7. Küster-Heins, K; de Lange, GJ; Zabel, M (2010): Porewater phosphorus geochemistry in surface sediments of sediment core GeoB9519-6 (rhizon samples). https://doi.org/10.1594/PANGAEA.736444
  8. Küster-Heins, K; de Lange, GJ; Zabel, M (2010): Porewater phosphorus geochemistry in surface sediments of sediment core GeoB9519-6 (squeezer samples). https://doi.org/10.1594/PANGAEA.736452