ORCID Profile
0000-0003-4652-8241
Current Organisation
University of Cambridge
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Publisher: Geological Society of America
Date: 08-11-2017
DOI: 10.1130/G38430.1
Publisher: Elsevier BV
Date: 03-2018
DOI: 10.1016/J.JSB.2017.11.011
Abstract: Shells of brachiopods are excellent archives for environmental reconstructions in the recent and distant past as their microstructure and geochemistry respond to climate and environmental forcings. We studied the morphology and size of the basic structural unit, the secondary layer fibre, of the shells of several extant brachiopod taxa to derive a model correlating microstructural patterns to environmental conditions. Twenty-one adult specimens of six recent brachiopod species adapted to different environmental conditions, from Antarctica, to New Zealand, to the Mediterranean Sea, were chosen for microstructural analysis using SEM, TEM and EBSD. We conclude that: 1) there is no significant difference in the shape and size of the fibres between ventral and dorsal valves, 2) there is an ontogenetic trend in the shape and size of the fibres, as they become larger, wider, and flatter with increasing age. This indicates that the fibrous layer produced in the later stages of growth, which is recommended by the literature to be the best material for geochemical analyses, has a different morphostructure and probably a lower organic content than that produced earlier in life. In two species of the same genus living in seawater with different temperature and carbonate saturation state, a relationship emerged between the microstructure and environmental conditions. Fibres of the polar Liothyrella uva tend to be smaller, rounder and less convex than those of the temperate Liothyrella neozelanica, suggesting a relationship between microstructural size, shell organic matter content, ambient seawater temperature and calcite saturation state.
Publisher: Elsevier BV
Date: 06-2020
Publisher: Elsevier BV
Date: 06-2018
Publisher: Elsevier BV
Date: 09-2022
Publisher: Elsevier BV
Date: 07-2021
Publisher: Scandinavian University Press / Universitetsforlaget AS
Date: 07-2020
DOI: 10.1111/LET.12412
Publisher: Elsevier BV
Date: 07-2018
Publisher: Elsevier BV
Date: 06-2019
Publisher: Elsevier BV
Date: 07-2016
Location: China
Location: Italy
Location: United Kingdom of Great Britain and Northern Ireland
No related grants have been discovered for Claudio Garbelli.