Show simple item record

dc.contributor.author Escapa, Carlos Mauricio
dc.contributor.author Perillo, Gerardo Miguel E.
dc.contributor.author Iribarne, Oscar Osvaldo
dc.date.available 2017-11-07T17:45:32Z
dc.date.issued 2008-11
dc.identifier.citation Escapa, Carlos Mauricio; Perillo, Gerardo Miguel E.; Iribarne, Oscar Osvaldo; Sediment dynamics modulated by burrowing crab activities in contrasting SW Atlantic intertidal habitats; Academic Press Ltd-elsevier Science Ltd; Estuarine, Coastal and Shelf Science; 80; 3; 11-2008; 365-373
dc.identifier.issn 0272-7714
dc.identifier.uri http://hdl.handle.net/11336/27750
dc.description.abstract Biogenic bottom features, animal burrows and biological activities interact with the hydrodynamics of the sediment–water interface to produce altered patterns of sediment erosion, transport and deposition which have consequences for large-scale geomorphologic features. It has been suggested that depending on the hydrodynamic status of the habitat, the biological activity on the bottom may have a variety of effects. In some cases, different bioturbation activities by the same organism can result in different consequences. The burrowing crab Neohelice granulata is the most important bioturbator at SW Atlantic saltmarshes and tidal plains. Because of the great variety of habitats that this species may inhabit, it is possible to compare its bioturbation effects between zones dominated by different hydrodynamic conditions. Internal marsh microhabitats, tidal creeks bottoms and basins, and open mudflats were selected as contrasting zones for the comparison on a large saltmarsh at Bahı ́ a Blanca Estuary (Argen- tina). Crab burrows act as passive traps of sediment in all zones, because their entrances remain open during inundation periods at high tide. Mounds are generated when crabs remove sediments from the burrows to the surface and become distinctive features in all the zones. Two different mechanisms of sediment transport utilizing mounds as sediment sources were registered. In the first one, parts of fresh mound sediments were transported when exposed to water flow during flooding and ebbing tide, with higher mound erosion where currents were higher as compared to internal marsh habitats and open mudflats. In the second mechanism, mounds exposed to atmospheric influence during low tide became desiccated and cracked forming ellipsoidal blocks, which were then transported by currents in zones of intense water flow in the saltmarsh edge. Sedimentary dynamics varied between zones; crabs were promoting trapping of sediments in the internal saltmarsh (380 g m 2 day 1 ) and open mudflats (1.2 kg m 2 day 1 ), but were enhancing sediment removal in the saltmarsh edge (between 10 and 500 g m 2 day 1 in summer). The implication is that biologically mediated sedimentological changes could be different among microhabitats, potentially leading to contrasting geomorphologic effects within a particular ecosystem.
dc.format application/pdf
dc.language.iso eng
dc.publisher Academic Press Ltd-elsevier Science Ltd
dc.rights info:eu-repo/semantics/restrictedAccess
dc.rights.uri https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject BIOTURBATION
dc.subject SEDIMENTATION
dc.subject MUD FLATS
dc.subject SALTMARSHES
dc.subject NEOHELICE GRANULATA
dc.subject BAHÍA BLANCA
dc.subject.classification Meteorología y Ciencias Atmosféricas
dc.subject.classification Ciencias de la Tierra y relacionadas con el Medio Ambiente
dc.subject.classification CIENCIAS NATURALES Y EXACTAS
dc.title Sediment dynamics modulated by burrowing crab activities in contrasting SW Atlantic intertidal habitats
dc.type info:eu-repo/semantics/article
dc.type info:ar-repo/semantics/artículo
dc.type info:eu-repo/semantics/publishedVersion
dc.date.updated 2017-10-30T18:34:34Z
dc.journal.volume 80
dc.journal.number 3
dc.journal.pagination 365-373
dc.journal.pais Países Bajos
dc.journal.ciudad amsterdam
dc.description.fil Fil: Escapa, Carlos Mauricio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto Argentino de Oceanografía. Universidad Nacional del Sur. Instituto Argentino de Oceanografía; Argentina. Universidad Nacional de Mar del Plata. Facultad de Cs.exactas y Naturales. Departamento de Biología. Laboratorio de Ecología; Argentina
dc.description.fil Fil: Perillo, Gerardo Miguel E.. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto Argentino de Oceanografía. Universidad Nacional del Sur. Instituto Argentino de Oceanografía; Argentina. Universidad Nacional del Sur; Argentina
dc.description.fil Fil: Iribarne, Oscar Osvaldo. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional del Sur; Argentina
dc.journal.title Estuarine, Coastal and Shelf Science
dc.relation.alternativeid info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1016/j.ecss.2008.08.020
dc.relation.alternativeid info:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S0272771408003375?via%3Dihub


Archivos asociados

Icon
Blocked Acceso no disponible

This item appears in the following Collection(s)

Show simple item record

info:eu-repo/semantics/restrictedAccess 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)