SEASONAL VARIABILITY OF BENTHIC FORAMINIFERAL FAUNAS AT 1000 M DEPTH IN THE BAY OF BISCAY

Abstract

Research Article| January 01, 2006 SEASONAL VARIABILITY OF BENTHIC FORAMINIFERAL FAUNAS AT 1000 M DEPTH IN THE BAY OF BISCAY Christophe Fontanier; Christophe Fontanier 3 1Laboratory of Recent and Fossil Bio-Indicators, Angers University, UPRES EA 2644, 2 Boulevard Lavoisier, 49045 Angers Cedex, France, and Laboratory for the Study of Marine Bio-Indicators (LEBIM), 85350 Ile d’Yeu, France. 3Email address: christophe.fontanier@univ-angers.fr Search for other works by this author on: GSW Google Scholar Frans Jorissen; Frans Jorissen 1Laboratory of Recent and Fossil Bio-Indicators, Angers University, UPRES EA 2644, 2 Boulevard Lavoisier, 49045 Angers Cedex, France, and Laboratory for the Study of Marine Bio-Indicators (LEBIM), 85350 Ile d’Yeu, France. Search for other works by this author on: GSW Google Scholar Pierre Anschutz; Pierre Anschutz 2Department of Geology and Oceanography, Bordeaux University, CNRS UMR 5805 EPOC, Avenue des Facultés, 33405 Talence Cedex, France. Search for other works by this author on: GSW Google Scholar Gwenaélle Chaillou Gwenaélle Chaillou 2Department of Geology and Oceanography, Bordeaux University, CNRS UMR 5805 EPOC, Avenue des Facultés, 33405 Talence Cedex, France. Search for other works by this author on: GSW Google Scholar Author and Article Information Christophe Fontanier 3 1Laboratory of Recent and Fossil Bio-Indicators, Angers University, UPRES EA 2644, 2 Boulevard Lavoisier, 49045 Angers Cedex, France, and Laboratory for the Study of Marine Bio-Indicators (LEBIM), 85350 Ile d’Yeu, France. Frans Jorissen 1Laboratory of Recent and Fossil Bio-Indicators, Angers University, UPRES EA 2644, 2 Boulevard Lavoisier, 49045 Angers Cedex, France, and Laboratory for the Study of Marine Bio-Indicators (LEBIM), 85350 Ile d’Yeu, France. Pierre Anschutz 2Department of Geology and Oceanography, Bordeaux University, CNRS UMR 5805 EPOC, Avenue des Facultés, 33405 Talence Cedex, France. Gwenaélle Chaillou 2Department of Geology and Oceanography, Bordeaux University, CNRS UMR 5805 EPOC, Avenue des Facultés, 33405 Talence Cedex, France. 3Email address: christophe.fontanier@univ-angers.fr Publisher: Cushman Foundation for Foraminiferal Research Received: 08 Apr 2004 Accepted: 03 Mar 2005 First Online: 09 Mar 2017 Online ISSN: 1943-264X Print ISSN: 0096-1191 © 2006 Journal of Foraminiferal Research Journal of Foraminiferal Research (2006) 36 (1): 61–76. https://doi.org/10.2113/36.1.61 Article history Received: 08 Apr 2004 Accepted: 03 Mar 2005 First Online: 09 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Christophe Fontanier, Frans Jorissen, Pierre Anschutz, Gwenaélle Chaillou; SEASONAL VARIABILITY OF BENTHIC FORAMINIFERAL FAUNAS AT 1000 M DEPTH IN THE BAY OF BISCAY. Journal of Foraminiferal Research 2006;; 36 (1): 61–76. doi: https://doi.org/10.2113/36.1.61 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyJournal of Foraminiferal Research Search Advanced Search Abstract A 1000-meter-deep station in the Bay of Biscay (station A) was sampled 10 times between October 1997 and April 2001 for the purposes of studying the temporal variability of live foraminiferal faunas in the 63–150 μm and >150 μm size fractions. The results are compared with those obtained earlier for a 550-m-deep station nearby. The study area is marked by prolonged, two-month spring blooms and less clear autumn blooms that result in labile organic matter enrichment of the upper sediment layers. Episodic exportation of phytodetritus had a recognizable impact on early diagenetic processes only in April 2001. During the 2001 spring bloom, bottom-water oxygenation and the depth of the zero-oxygen boundary were minimum.Foraminiferal faunas respond to bloom events by increases in the abundance of opportunistic taxa. In the >150 μm size fraction, Uvigerina mediterranea and Uvigerina peregrina preferentially reproduced and thrived in shallow infaunal microhabitats that are seasonally enriched in phytodetritus. Although the seasonal changes in the 63–150 μm size fraction are less straightforward, Nuttallides pusillus and Uvigerina peregrina did show marked seasonal changes in abundance. The temporal changes in the foraminiferal faunas at the 1000-m-deep station appear to be synchronous with those recorded at the 550-m-deep station. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.