Physiological controls on seawater uptake and calcification in the benthic foraminifer Ammonia tepida
Nooijer, L. J. de (Alfred-Wegener-Institut für Polar- und Meeresforschung)
Langer, Gerald (Universitat Autònoma de Barcelona. Institut de Ciència i Tecnologia Ambientals)
Nehrke, G. (Alfred-Wegener-Institut für Polar- und Meeresforschung)
Bijma, Jelle (Alfred-Wegener-Institut für Polar- und Meeresforschung)

Date:	2009
Abstract:	To analyze the relation between seawater uptake and calcification, we incubated juveniles of the benthic foraminifer Ammonia tepida with various fluorescent probes and visualised them afterwards with confocal laser scanning microscopy. Vesicle membranes, Ca ions and vacuole fluids were followed with various tracers and showed for the first time that endocytosis of seawater is part of the calcification process in Ammonia tepida. Data on the intracellular Ca ion cycling allowed for calculating a preliminary cellular Ca budget during foraminiferal calcification. This showed that the free calcium involved in the production of a new chamber cannot be sufficient and suggests that foraminifera may precipitate their calcite from an amorphous precursor.
Grants:	European Commission 211384
Rights:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original.
Language:	Anglès
Document:	Article ; recerca ; Versió publicada
Subject:	Seawater uptake ; Calcification ; Benthic foraminifer
Published in:	Biogeosciences, Vol. 6 No. 11 (November 2009) , p. 2669-2675, ISSN 1726-4189

DOI: 10.5194/bg-6-2669-2009

7 p, 1.1 MB

The record appears in these collections:
Research literature > UAB research groups literature > Research Centres and Groups (research output) > Experimental sciences > Institut de Ciència i Tecnologia Ambientals (ICTA)
Articles > Research articles
Articles > Published articles