@article{244,
  author = {Alfonso Pardo and Gerta Keller and Eustoquio Molina and Jos{\'e}I. Canudo},
  title = {Planktic foraminiferal turnover across the Paleocene-Eocene transition at (DSDP) Site 401, Bay of Biscay, North Atlantic},
  abstract = {<p>Planktic foraminifera across the Paleocene-Eocene transition at DSDP Site 401 indicate that the benthic foraminiferal mass extinction occurred within Subzone P 6a of Berggren and Miller (1988), or P5 of Berggren et al. (1995) and coincident with a sudden 2.0\%. excursion in\&nbsp;<em>δ</em>13<em>C</em>\&nbsp;values. The benthic foraminiferal extinction event (BFEE) and\&nbsp;<em>δ</em>13<em>C</em>excursion was accompanied by a planktic foraminiferal turnover marked by an influx of warm water species (<em>Morozovella</em>\&nbsp;and\&nbsp;<em>Acarinina</em>), a decrease in cooler water species (<em>Subbotina</em>), a sudden short-term increase in low oxygen tolerant taxa (<em>Chiloguembelina</em>), and no significant species extinctions. These faunal changes suggest climatic warming, expansion of the oxygen minimum zone, and a well stratified ocean water column. Oxygen isotope data of the surface dweller\&nbsp;<em>M. subbotina</em>\&nbsp;suggest climate warming beginning with a gradual 0.5\%. decrease in\&nbsp;<em>δ</em>18<em>O</em>\&nbsp;in the 175 cm preceding the benthic foraminiferal extinction event followed by a sudden decrease of 1\%. (4 {\textdegree}C) at the BFEE. The\&nbsp;<em>δ</em>13<em>C</em>\&nbsp;excursion occurred over 27 cm of sediment and, assuming constant sediment accumulation rates, represents a maximum of 23 ka. Recovery to pre-excursion\&nbsp;<em>gd</em>13<em>C</em>\&nbsp;values occurs within 172 cm, or about 144 ka. Climate cooling begins in Subzone P 6c as indicated by an increase in cooler water subbotinids and acarininids with rounded chambers and a decrease in warm water morozovellids.\&nbsp; <a href="https://geoweb.princeton.edu/research/keller/pubs/Pardo-1997-MarineMicro.pdf" target="_blank">PDF</a></p>
},
  year = {1997},
  journal = {Marine Micropaleontology},
  volume = {29},
  pages = {129{\textendash}158},
  month = {jan},
  url = {https://doi.org/10.1016/s0377-8398(96)00035-7},
  doi = {10.1016/s0377-8398(96)00035-7},
  language = {eng},
}