Erba, Elisabetta; Bottini, Cinzia; Weissert, Helmut J; Keller, Christina E (2010): Morphometry of calcareous nannofossils from the Oceanic Anoxic Event 1a [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.771682, Supplement to: Erba, E et al. (2010): Calcareous nannoplankton response to surface-water acidification around Oceanic Anoxic Event 1a. Science, 329(5990), 428-432, https://doi.org/10.1126/science.1188886
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Abstract:
Ocean acidification induced by atmospheric CO2 may be a major threat to marine ecosystems, particularly to calcareous nannoplankton. We show that, during the Aptian (~120 million years ago) Oceanic Anoxic Event 1a, which resulted from a massive addition of volcanic CO2, the morphological features of calcareous nannofossils traced the biological response to acidified surface waters. We observe the demise of heavily calcified nannoconids and reduced calcite paleofluxes at the beginning of a pre-anoxia calcification crisis. Ephemeral coccolith dwarfism and malformation represent species-specific adjustments to survive lower pH, whereas later, abundance peaks indicate intermittent alkalinity recovery. Deepwater acidification occurred with a delay of 25,000 to 30,000 years. After the dissolution climax, nannoplankton and carbonate recovery developed over ~160,000 years under persisting global dysoxia-anoxia.
Project(s):
Deep Sea Drilling Project (DSDP)
Coverage:
Median Latitude: 37.816733 * Median Longitude: 66.055933 * South-bound Latitude: 21.350200 * West-bound Longitude: 11.750000 * North-bound Latitude: 46.050000 * East-bound Longitude: 174.667800
Date/Time Start: 1978-08-02T00:00:00 * Date/Time End: 1978-08-02T00:00:00
Event(s):
62-463 * Latitude: 21.350200 * Longitude: 174.667800 * Date/Time: 1978-08-02T00:00:00 * Elevation: -2525.0 m * Penetration: 822.5 m * Recovery: 305.5 m * Location: North Pacific/SEAMOUNT * Campaign: Leg62 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 92 cores; 820.5 m cored; 0 m drilled; 37.2 % recovery
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
3 datasets
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Datasets listed in this publication series
- Erba, E; Bottini, C; Weissert, HJ et al. (2010): (Table S2) Calcareous nannoplankton morphometric analyses performed of DSDP Hole 62-463 samples. https://doi.org/10.1594/PANGAEA.771668
- Erba, E; Bottini, C; Weissert, HJ et al. (2010): (Table S1) Calcareous nannoplankton morphometric analyses performed of Cismon sediment core samples. https://doi.org/10.1594/PANGAEA.771663
- Erba, E; Bottini, C; Weissert, HJ et al. (2010): (Table S3) Stratigraphy of intervals in Cismon sediment core. https://doi.org/10.1594/PANGAEA.771677