Mostrar el registro sencillo del ítem Dale, A. W. Sommer, S. Lomnitz, U. Montes Torres, Ivonne Treude, T. Liebetrau, V. Gier, J. Hensen, C. Dengler, M. Stolpovsky, K. Bryant, L. D. Wallmann, K.
dc.coverage.spatial Perú 2018-09-10T15:21:16Z 2018-09-10T15:21:16Z 2015-03-11
dc.identifier.citation Dale, A. W., Sommer, S., Lomnitz, U., Montes, I., Treude, T., Liebetrau, V., ... Wallmann, K. (2015). Organic carbon production, mineralisation and preservation on the Peruvian margin.==$Biogeosciences, 12$==(5), 1537–1559. es_ES
dc.identifier.govdoc index-oti2018
dc.description.abstract Carbon cycling in Peruvian margin sediments (11 and 12° S) was examined at 16 stations, from 74 m water depth on the middle shelf down to 1024 m, using a combination of in situ flux measurements, sedimentary geochemistry and modelling. Bottom water oxygen was below detection limit down to ca. 400 m and increased to 53 μM at the deepest station. Sediment accumulation rates decreased sharply seaward of the middle shelf and subsequently increased at the deep stations. The organic carbon burial efficiency (CBE) was unusually low on the middle shelf (<20%) when compared to an existing global database, for reasons which may be linked to episodic ventilation of the bottom waters by oceanographic anomalies. Deposition of reworked, degraded material originating from sites higher up on the slope is proposed to explain unusually high sedimentation rates and CBE (>60%) at the deep oxygenated sites. In line with other studies, CBE was elevated under oxygen-deficient waters in the mid-water oxygen minimum zone. Organic carbon rain rates calculated from the benthic fluxes alluded to efficient mineralisation of organic matter in the water column compared to other oxygen-deficient environments. The observations at the Peruvian margin suggest that a lack of oxygen does not greatly affect the degradation of organic matter in the water column but promotes the preservation of organic matter in sediments. es_ES
dc.format application/pdf es_ES
dc.language.iso eng es_ES
dc.publisher European Geosciences Union (EGU) es_ES
dc.relation.ispartof urn:issn:1726-4170
dc.rights info:eu-repo/semantics/openAccess es_ES
dc.rights.uri es_ES
dc.subject Sediments es_ES
dc.subject Sedimentation es_ES
dc.subject Carbon cycle es_ES
dc.subject Geochemistry es_ES
dc.subject Mineralization es_ES
dc.subject Organic material es_ES
dc.title Organic carbon production, mineralisation and preservation on the Peruvian margin es_ES
dc.type info:eu-repo/semantics/article es_ES
dc.subject.ocde es_ES
dc.subject.ocde es_ES
dc.identifier.journal Biogeosciences es_ES
dc.description.peer-review Por pares es_ES
dc.identifier.doi es_ES




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