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Artículo

Sclerobionts on Patagonian Oysters from the Puerto Madryn Formation (Early - Late Miocene, Argentina)

Romero, María VirginiaIcon ; Brezina, Soledad SilvanaIcon ; Bremec, Claudia SilviaIcon ; Casadio, Silvio AlbertoIcon
Fecha de publicación: 05/2018
Editorial: Asociacion Paleontologica Argentina
Revista: Ameghiniana
ISSN: 0002-7014
e-ISSN: 1851-8044
Idioma: Inglés
Tipo de recurso: Artículo publicado
Clasificación temática:
Meteorología y Ciencias Atmosféricas

Resumen

This work describes the composition and distribution of sclerobionts on the Miocene Patagonian oyster Ostrea alvarezii d'Orbigny and provides information about its paleoenvironment. The structure of sclerobiont assemblages and their preferential distribution on left/right valves (n=340) as well as their external/internal surfaces and areas was evaluated by means of multivariate analyses (nMDS, SIMPER), non-parametric tests for producing mean comparisons, and goodness of fit tests using coverage and abundance data. Sixteen ichnotaxa were recorded. Bivalves, polychaetes and bryozoans were the most representative encrusters. External surfaces, left valves and sediment-free areas were the most colonized. O. alvarezii beds are interpreted as within-habitat time-averaged assemblages. Oysters appear to have lived in small subtidal channels in a low energy tidal flat and closely related to the sediment-water interface, with the right valve resting on the substrate. Sclerobionts showed diverse behaviors, trophic levels and tiering. This suggests that sclerobiont assemblages on O. alvarezii had a complex structure with subdivision of resources, including a vertical colonization of valves by tracemakers at different levels of depth.
Palabras clave: Boring And Encrusting Organisms , Oyster Beds , Patagonia , Sw Atlantic Ocean , Tortonian
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info:eu-repo/semantics/openAccess Excepto donde se diga explícitamente, este item se publica bajo la siguiente descripción: Creative Commons Attribution-NonCommercial-ShareAlike 2.5 Unported (CC BY-NC-SA 2.5)
Identificadores
URI: http://hdl.handle.net/11336/67321
URL: http://www.ameghiniana.org.ar/index.php/ameghiniana/article/view/1030
DOI: http://dx.doi.org/10.5710/AMGH.29.08.2017.3081
Colecciones
Articulos(IIMYC)
Articulos de INSTITUTO DE INVESTIGACIONES MARINAS Y COSTERAS
Articulos(IIPG)
Articulos de INSTITUTO DE INVESTIGACION EN PALEOBIOLOGIA Y GEOLOGIA
Citación
Romero, María Virginia; Brezina, Soledad Silvana; Bremec, Claudia Silvia; Casadio, Silvio Alberto; Sclerobionts on Patagonian Oysters from the Puerto Madryn Formation (Early - Late Miocene, Argentina); Asociacion Paleontologica Argentina; Ameghiniana; 55; 2; 5-2018; 179-196
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