The shallow marine ostracod communities of the Azores (Mid- North Atlantic): taphonomy and palaeoecology
This is the first palaeoecological and taphonomical study of the Recent marine ostracods from the Azores. The aims of this work were to address the following questions: i) to establish the typical ostracod assemblages from the shallow waters of the Azores; ii) to determine the bathymetric ranges for...
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Universitat de Barcelona (UB), Geociències Barcelona (Geo3BCN), Institut de Diagnosi Ambiental i Estudis de l'Aigua (IDAEA), Universitat Autònoma de Barcelona (UAB)
2014
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ftdoajarticles:oai:doaj.org/article:bcb92bd9fd144b0d9d5b64107aa837a2 2023-11-12T04:22:47+01:00 The shallow marine ostracod communities of the Azores (Mid- North Atlantic): taphonomy and palaeoecology R. PIAZZA MEIRELES D. KEYSER P.A. BORGES L. SILVA A.M. DE FRIAS MARTINS S.P. ÁVILA 2014-06-01T00:00:00Z https://doaj.org/article/bcb92bd9fd144b0d9d5b64107aa837a2 EN eng Universitat de Barcelona (UB), Geociències Barcelona (Geo3BCN), Institut de Diagnosi Ambiental i Estudis de l'Aigua (IDAEA), Universitat Autònoma de Barcelona (UAB) https://revistes.ub.edu/index.php/GEOACTA/article/view/10467 https://doaj.org/toc/1696-5728 1696-5728 https://doaj.org/article/bcb92bd9fd144b0d9d5b64107aa837a2 Geologica Acta, Vol 12, Iss 1 (2014) Ostracods Recent Oceanic island Taphonomic processes Palaeoecology Bayesian model Science Q Geology QE1-996.5 article 2014 ftdoajarticles 2023-10-22T00:36:12Z This is the first palaeoecological and taphonomical study of the Recent marine ostracods from the Azores. The aims of this work were to address the following questions: i) to establish the typical ostracod assemblages from the shallow waters of the Azores; ii) to determine the bathymetric ranges for each ostracod species; iii) to investigate the time span and depth in which significant transport occurs; iv) to quantify the amount of out of habitat transport between sandy beaches, tide pools and the sublittoral; v) to determine distinctive taphonomic features that can be used to recognize the amount of temporal resolution in ostracod assemblages. Fifteen species were recovered, representing 8 families and 12 genera (Loxoconcha, Neonesidea, Xestoleberis, Aurila, Urocythereis, Heterocythereis, Carinocythereis, Callistocythere, Leptocythere, Semicytherura, Lanceostoma and Cylindroleberis). The living assemblages are dominated by specimens of the Loxoconchidae, Xestoleberidae and Hemicytheridae, whereas the dead assemblages are dominated by specimens of the Loxoconchidae, Hemicytheridae, Bairdiidae, Xestoleberidae and Trachyleberidae. The shift from life-dominated assemblages in the shallower depths to death-dominated assemblages at greater depths is a consequence of significant transport downwards. The abundance of ostracods is higher in the first 10-20 m depth, especially in fine to medium sandy substrates. Considerable differences among islands were supported by the Bayesian model, as a consequence of the physical and hydrodynamic factors that differently affect each of the Azorean islands. Large-scale (sea-surface currents, Holocene relative sea-level, storms) and small-scale processes are responsible for shaping the Azorean Recent marine ostracod communities. No living specimens were found in the samples collected at the beach faces, thus reinforcing former interpretations of one of the authors (S. Ávila) that advocate that at a global scale, sandy beaches in oceanic islands located at temperate latitudes are ... Article in Journal/Newspaper North Atlantic Directory of Open Access Journals: DOAJ Articles |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Ostracods Recent Oceanic island Taphonomic processes Palaeoecology Bayesian model Science Q Geology QE1-996.5 |
spellingShingle |
Ostracods Recent Oceanic island Taphonomic processes Palaeoecology Bayesian model Science Q Geology QE1-996.5 R. PIAZZA MEIRELES D. KEYSER P.A. BORGES L. SILVA A.M. DE FRIAS MARTINS S.P. ÁVILA The shallow marine ostracod communities of the Azores (Mid- North Atlantic): taphonomy and palaeoecology |
topic_facet |
Ostracods Recent Oceanic island Taphonomic processes Palaeoecology Bayesian model Science Q Geology QE1-996.5 |
description |
This is the first palaeoecological and taphonomical study of the Recent marine ostracods from the Azores. The aims of this work were to address the following questions: i) to establish the typical ostracod assemblages from the shallow waters of the Azores; ii) to determine the bathymetric ranges for each ostracod species; iii) to investigate the time span and depth in which significant transport occurs; iv) to quantify the amount of out of habitat transport between sandy beaches, tide pools and the sublittoral; v) to determine distinctive taphonomic features that can be used to recognize the amount of temporal resolution in ostracod assemblages. Fifteen species were recovered, representing 8 families and 12 genera (Loxoconcha, Neonesidea, Xestoleberis, Aurila, Urocythereis, Heterocythereis, Carinocythereis, Callistocythere, Leptocythere, Semicytherura, Lanceostoma and Cylindroleberis). The living assemblages are dominated by specimens of the Loxoconchidae, Xestoleberidae and Hemicytheridae, whereas the dead assemblages are dominated by specimens of the Loxoconchidae, Hemicytheridae, Bairdiidae, Xestoleberidae and Trachyleberidae. The shift from life-dominated assemblages in the shallower depths to death-dominated assemblages at greater depths is a consequence of significant transport downwards. The abundance of ostracods is higher in the first 10-20 m depth, especially in fine to medium sandy substrates. Considerable differences among islands were supported by the Bayesian model, as a consequence of the physical and hydrodynamic factors that differently affect each of the Azorean islands. Large-scale (sea-surface currents, Holocene relative sea-level, storms) and small-scale processes are responsible for shaping the Azorean Recent marine ostracod communities. No living specimens were found in the samples collected at the beach faces, thus reinforcing former interpretations of one of the authors (S. Ávila) that advocate that at a global scale, sandy beaches in oceanic islands located at temperate latitudes are ... |
format |
Article in Journal/Newspaper |
author |
R. PIAZZA MEIRELES D. KEYSER P.A. BORGES L. SILVA A.M. DE FRIAS MARTINS S.P. ÁVILA |
author_facet |
R. PIAZZA MEIRELES D. KEYSER P.A. BORGES L. SILVA A.M. DE FRIAS MARTINS S.P. ÁVILA |
author_sort |
R. PIAZZA MEIRELES |
title |
The shallow marine ostracod communities of the Azores (Mid- North Atlantic): taphonomy and palaeoecology |
title_short |
The shallow marine ostracod communities of the Azores (Mid- North Atlantic): taphonomy and palaeoecology |
title_full |
The shallow marine ostracod communities of the Azores (Mid- North Atlantic): taphonomy and palaeoecology |
title_fullStr |
The shallow marine ostracod communities of the Azores (Mid- North Atlantic): taphonomy and palaeoecology |
title_full_unstemmed |
The shallow marine ostracod communities of the Azores (Mid- North Atlantic): taphonomy and palaeoecology |
title_sort |
shallow marine ostracod communities of the azores (mid- north atlantic): taphonomy and palaeoecology |
publisher |
Universitat de Barcelona (UB), Geociències Barcelona (Geo3BCN), Institut de Diagnosi Ambiental i Estudis de l'Aigua (IDAEA), Universitat Autònoma de Barcelona (UAB) |
publishDate |
2014 |
url |
https://doaj.org/article/bcb92bd9fd144b0d9d5b64107aa837a2 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
Geologica Acta, Vol 12, Iss 1 (2014) |
op_relation |
https://revistes.ub.edu/index.php/GEOACTA/article/view/10467 https://doaj.org/toc/1696-5728 1696-5728 https://doaj.org/article/bcb92bd9fd144b0d9d5b64107aa837a2 |
_version_ |
1782337724533964800 |