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Título
Factores que controlan la calcificación de la concha Neogloboquadrina pachyderma (dextrorsa)
Otros títulos
Controls of shell calcification in Neogloboquadrina pachyderma (right coiling)
Autor(es)
Materia
Calcificación
Foraminíferos planctónicos
Isótopos, etapas marinas
Alborán, Mar de
Shell weight
Calcification rate
Neogloboquadrina pachyderma (right coiling)
Alboran Sea
Marine isotope stage 7
Fecha de publicación
2008
Editor
Sociedad Geológica de España (Madrid, España)
Citación
González-Mora, B. y Sierro Sánchez, F. J. (2008). Factores que controlan la calcificación de la concha Neogloboquadrina pachyderma (dextrorsa). "Geogaceta", 44, 123-126
Resumen
Samples from core ODP site 977, retrieved in the Alboran Sea (Western Mediterranean Sea), have beenstudied 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 analysedbetween 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 cannotbe ruled out a secondary control exerted by surface water [CO3 2-], 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.
Descripción
Este trabajo analiza la calcificación de los foraminíferos planctónicos basándose en la utilización del peso de las conchas de los foraminíferos como un indicador de la saturación en carbonato del agua y del nivel de C02 atmosférico. La especie utilizada en este estudio es Neogloboquadrina pachyderma (dextrorsa) del Mar de Alborán.
URI
Colecciones
- DGL. Artículos [289]