Fink, Hiske G; Wienberg, Claudia; Hebbeln, Dierk; McGregor, Helen V; Schmiedl, Gerhard; Taviani, Marco; Freiwald, André (2012): Radiocarbon dating on cold-water corals, grain size, Corg, and benthic foraminfera assemblage of two sediment cores from the Ionian Sea [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.784414
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Abstract:
Continuous sedimentary records from an eastern Mediterranean cold-water coral ecosystem thriving in intermediate water depths (~600 m) reveal a temporary extinction of cold-water corals during the Early to Mid Holocene from 11.4-5.9 cal kyr BP. Benthic foraminiferal assemblage analysis shows low-oxygen conditions of 2 ml l**-1 during the same period, compared to bottom-water oxygen values of 4-5 ml l**-1 before and after the coral-free interval. The timing of the corals' demise coincides with the sapropel S1 event, during which the deep eastern Mediterranean basin turned anoxic. Our results show that during the sapropel S1 event low oxygen conditions extended to the rather shallow depths of our study site in the Ionian Sea and caused the cold-water corals temporary extinction. This first evidence for the sensitivity of cold-water corals to low oceanic oxygen contents suggests that the projected expansion of tropical oxygen minimum zones resulting from global change will threaten cold-water coral ecosystems in low latitudes in the same way that ocean acidification will do in the higher latitudes.
Related to:
Fink, Hiske G; Wienberg, Claudia; Hebbeln, Dierk; McGregor, Helen V; Schmiedl, Gerhard; Taviani, Marco; Freiwald, André (2012): Oxygen control on Holocene cold-water coral development in the eastern Mediterranean Sea. Deep Sea Research Part I: Oceanographic Research Papers, 62, 89-96, https://doi.org/10.1016/j.dsr.2011.12.013
Project(s):
Funding:
Seventh Framework Programme (FP7), grant/award no. 226354: Hotspot Ecosystem Research and Mans Impact On European Seas
Coverage:
Median Latitude: 39.556200 * Median Longitude: 18.455800 * South-bound Latitude: 39.555200 * West-bound Longitude: 18.455600 * North-bound Latitude: 39.557200 * East-bound Longitude: 18.456000
Date/Time Start: 2006-10-11T16:50:00 * Date/Time End: 2006-10-11T17:40:00
Event(s):
M70/1_730 (GeoB11185-1) * Latitude: 39.555200 * Longitude: 18.455600 * Date/Time: 2006-10-11T16:50:00 * Elevation: -612.0 m * Recovery: 2.66 m * Location: Santa Maria di Leuca * Campaign: M70/1 * Basis: Meteor (1986) * Method/Device: Gravity corer (Kiel type) (SL) * Comment: abundant coral fragments in the top 99 cm of the core
M70/1_731 (GeoB11186-1) * Latitude: 39.557200 * Longitude: 18.456000 * Date/Time: 2006-10-11T17:40:00 * Elevation: -628.0 m * Recovery: 3.1 m * Location: Santa Maria di Leuca * Campaign: M70/1 * Basis: Meteor (1986) * Method/Device: Gravity corer (Kiel type) (SL) * Comment: abundant coral fragments in the top 143 cm of the core
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
5 datasets
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Datasets listed in this publication series
- Fink, HG; Wienberg, C; Hebbeln, D et al. (2012): (Supplementary Table 1) Species abundance of benthic foraminifera (size fraction 150-500 µm) in sediment core GeoB11185-1. https://doi.org/10.1594/PANGAEA.784347
- Fink, HG; Wienberg, C; Hebbeln, D et al. (2012): (Supplementary Table 2) Estimates of bottom-water oxygenation at site GeoB11185-1. https://doi.org/10.1594/PANGAEA.784362
- Fink, HG; Wienberg, C; Hebbeln, D et al. (2012): (Table 2) AMS 14C of sediment cores GeoB11185-1 and GeoB11186-1. https://doi.org/10.1594/PANGAEA.784409
- Fink, HG; Wienberg, C; Hebbeln, D et al. (2012): (Table 3) Grain size analyses of sediment core GeoB11185-1. https://doi.org/10.1594/PANGAEA.784410
- Fink, HG; Wienberg, C; Hebbeln, D et al. (2012): (Table 3) Grain size analyses of sediment core GeoB11186-1. https://doi.org/10.1594/PANGAEA.784411