Ecological importance of passive deposition of organic matter into burrows of the SW Atlantic crab Chasmagnathus granulatus


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dc.contributor.author Botto, Florencia
dc.contributor.author Iribarne, Oscar
dc.contributor.author Gutierrez, Jorge
dc.contributor.author Bava, Jose
dc.contributor.author Gagliardini, Antonio
dc.contributor.author Valiela, Ivan
dc.date.accessioned 2011-04-22T18:43:33Z
dc.date.available 2011-04-22T18:43:33Z
dc.date.issued 2006-04-24
dc.identifier.citation Marine Ecology Progress Series 312 (2006): 201-21 en_US
dc.identifier.uri http://hdl.handle.net/1912/4509
dc.description Author Posting. © Inter-Research, 2006. This article is posted here by permission of Inter-Research for personal use, not for redistribution. The definitive version was published in Marine Ecology Progress Series 312 (2006): 201-21, doi:10.3354/meps312201. en_US
dc.description.abstract The burrowing crab Chasmagnathus granulatus is the most abundant bioturbator in estuarine intertidal sediments from southern Brazil to central Argentina. This crab is a deposit feeder that excavates and maintains large semi-permanent open burrows with funnel shaped entrances. In this study we showed that the funnel shaped burrows with low aspect ratio are the most common and, with field experiments, we demonstrated that these burrows are also the most efficient in the capture of organic matter. As shown by C isotopic signatures, the origin of trapped detrital material is Spartina densiflora. Burrows are distributed in the upper part of estuaries and saltmarshes, mostly in areas of low energy, and cover extensive areas between the marsh vegetation and the open estuary. Through sampling of crab densities and use of satellite images, we estimated the number of burrows of different shapes in the Bahia Blanca estuary (38°50’S), one of the largest estuarine intertidals in the SW Atlantic. After combining this information with the trapping efficiency of burrows of different shapes, we estimated that within 100 d, a crab bed could capture the entire annual production from a marsh area of similar size. Therefore, we suggest that these extensive burrow beds may be considered large macrodetritus retention areas, reducing the amount of organic matter exported from marshes but locally increasing the sediment organic matter content. en_US
dc.description.sponsorship This research was supported by grants from the Universidad Nacional de Mar del Plata, CONICET (PIA No. 6097 to O.I.), International Foundation for Science, Sweden (No. A/3058-2F to F.B.), Agencia Nacional de Promocion Cientifica y Tecnologica (PICT 13527-03 to O.I.), and Fundación Antorchas (No. 13956-46 to F.B., No. 53900-13 to O.I.). F.B. and J.G. were supported by CONICET scholarships and summer research fellowships from the Woods Hole Marine Biological Laboratory. en_US
dc.format.mimetype application/pdf
dc.language.iso en en_US
dc.publisher Inter-Research en_US
dc.relation.uri http://dx.doi.org/10.3354/meps312201
dc.subject Spartina-marsh en_US
dc.subject Chasmagnathus granulatus en_US
dc.subject Burrowing en_US
dc.subject Detritus dynamics en_US
dc.title Ecological importance of passive deposition of organic matter into burrows of the SW Atlantic crab Chasmagnathus granulatus en_US
dc.type Article en_US
dc.identifier.doi 10.3354/meps312201

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