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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2014
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ftuabarcelonapb:oai:ddd.uab.cat:117216 2024-04-21T08:08:08+00:00 The shallow marine ostracod communities of the Azores (Mid-North Atlantic) : taphonomy and palaeoecology Piazza Meireles, R. Keyse, D. Borges, P. A. Silva, L. Frias Martins, A. M. de Ãvila, Sérgio P. Universidade dos Açores. Centro de Investigação em Biodiversidade e Recursos Genéticos InBIO Laboratório Associado 2014 application/pdf https://ddd.uab.cat/record/117216 eng eng Geologica acta Vol. 12, Núm. 1 (March 2014), p. 53-70 https://ddd.uab.cat/record/117216 urn:10.1344/105.000002073 urn:oai:ddd.uab.cat:117216 urn:articleid:16965728v12n1p53 urn:oai:raco.cat:article/275588 urn:scopus_id:84897044323 urn:wos_id:000333550200004 urn:oai:revistes.ub.edu:article/10467 open access 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, sempre i quan aquestes es distribueixin sota la mateixa llicència que regula l'obra original i es reconegui l'autoria. https://creativecommons.org/licenses/by-sa/3.0/ Ostracods Recent Oceanic islands Taphonomic processes Palaeoecology Bayesian model Article 2014 ftuabarcelonapb 2024-03-26T09:33:57Z 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. Ãvila) that advocate that at a global scale, sandy beaches in oceanic islands located at temperate latitudes are ... Article in Journal/Newspaper North Atlantic Universitat Autònoma de Barcelona: Dipòsit Digital de Documents de la UAB Geologica Acta 17 |
institution |
Open Polar |
collection |
Universitat Autònoma de Barcelona: Dipòsit Digital de Documents de la UAB |
op_collection_id |
ftuabarcelonapb |
language |
English |
topic |
Ostracods Recent Oceanic islands Taphonomic processes Palaeoecology Bayesian model |
spellingShingle |
Ostracods Recent Oceanic islands Taphonomic processes Palaeoecology Bayesian model Piazza Meireles, R. Keyse, D. Borges, P. A. Silva, L. Frias Martins, A. M. de Ãvila, Sérgio P. Universidade dos Açores. Centro de Investigação em Biodiversidade e Recursos Genéticos InBIO Laboratório Associado The shallow marine ostracod communities of the Azores (Mid-North Atlantic) : taphonomy and palaeoecology |
topic_facet |
Ostracods Recent Oceanic islands Taphonomic processes Palaeoecology Bayesian model |
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. Ãvila) that advocate that at a global scale, sandy beaches in oceanic islands located at temperate latitudes are ... |
format |
Article in Journal/Newspaper |
author |
Piazza Meireles, R. Keyse, D. Borges, P. A. Silva, L. Frias Martins, A. M. de Ãvila, Sérgio P. Universidade dos Açores. Centro de Investigação em Biodiversidade e Recursos Genéticos InBIO Laboratório Associado |
author_facet |
Piazza Meireles, R. Keyse, D. Borges, P. A. Silva, L. Frias Martins, A. M. de Ãvila, Sérgio P. Universidade dos Açores. Centro de Investigação em Biodiversidade e Recursos Genéticos InBIO Laboratório Associado |
author_sort |
Piazza Meireles, R. |
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 |
publishDate |
2014 |
url |
https://ddd.uab.cat/record/117216 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
Geologica acta Vol. 12, Núm. 1 (March 2014), p. 53-70 https://ddd.uab.cat/record/117216 urn:10.1344/105.000002073 urn:oai:ddd.uab.cat:117216 urn:articleid:16965728v12n1p53 urn:oai:raco.cat:article/275588 urn:scopus_id:84897044323 urn:wos_id:000333550200004 urn:oai:revistes.ub.edu:article/10467 |
op_rights |
open access 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, sempre i quan aquestes es distribueixin sota la mateixa llicència que regula l'obra original i es reconegui l'autoria. https://creativecommons.org/licenses/by-sa/3.0/ |
container_title |
Geologica Acta |
container_issue |
17 |
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1796948351271305216 |