Factores que controlan la calcificacion de la concha en Neogloboquadrina pachyderma (dextrorsa)  [Factors controlling shell calcification in Neogloboquadrina pachyderma (dextrose)]

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Alternate Title(s): Factors controlling shell calcification in Neogloboquadrina pachyderma (dextrose)
Author(s): González-Mora, B.; Sierro Sánchez, Francisco Javier
Author Affiliation(s): Primary:
Universidad de Salamanca, Salamanca, Spain
Volume Title: Comunicaciones presentadas en la 44 sesion cientifica de la Sociedad Geologica de España
Volume Author(s): Huertas Coronel, Maria José, editor; Sancho Marcen, C.; Colombo Piñol, F.
Source: Geogaceta, Vol.44, p.123-126; 44. sesion cientifica de la Sociedad Geologica de España, Jaen, Spain, May 30, 2008, edited by Maria José Huertas Coronel, C. Sancho Marcen and F. Colombo Piñol. Publisher: Sociedad Geológica de España, Salamanca, Spain. ISSN: 0213-683X
Note: In Spanish with English summary. 11 refs.; illus.
Summary: Samples from core ODP site 977, retrieved in the Alboran Sea (Western Mediterranean Sea), have been studied in order to better constrain the factors controlling the calcification rate in the planktonic foraminifer Neogloboquadrina pachyderma (right coiling). For this purpose, changes in shell weight have been analysed between 245-190 kyr (Marine Isotope Stage 7) and show a clear millennial variability not related with the marine isotope substages. The results obtained suggest that Neogloboquadrina pachyderma (right coiling) calcification rate is directly related to optimum growth conditions, since heavier shell weights coincide with more relative abundance of this species due to optimum temperature conditions. However, it cannot be ruled out a secondary control exerted by surface water [CO32-], resulting from the opposite effects of atmospheric CO2 and water temperature. Therefore, this study questions the use of foraminifer shell weight as a proxy of carbonate saturation and atmospheric CO2 in surface waters and suggests that further studies are needed to better understand the processes behind shell calcification in planktonic foraminifers.
Year of Publication: 2008
Research Program: ODP Ocean Drilling Program
Key Words: 10 Paleontology, Invertebrate; Alboran Sea; Calcification; Carbon; Carbon cycle; Carbon dioxide; Europe; Foraminifera; Geochemical cycle; Globigerinacea; Iberian Peninsula; Leg 161; MIS 7; Mediterranean Sea; Microfossils; Neogloboquadrina; Neogloboquadrina pachyderma; ODP Site 977; Ocean Drilling Program; Paleotemperature; Planktonic taxa; Rotaliina; Shells; Southern Europe; Spain; West Mediterranean
Coordinates: N360154 N360154 W0015719 W0015719
Record ID: 2019062260
Copyright Information: GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from Instituto Geologico y Minero de Espana, Madrid, Spain