Effect of sediment grain size and bioturbation on decomposition of organic matter from aquaculture

Please use this identifier to cite or link to this item: http://hdl.handle.net/10045/48105
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Title: Effect of sediment grain size and bioturbation on decomposition of organic matter from aquaculture
Authors: Martinez-Garcia, Elena | Carlsson, Marita Sundstein | Sanchez-Jerez, Pablo | Sánchez-Lizaso, José Luis | Sanz-Lázaro, Carlos | Holmer, Marianne
Research Group/s: Biología Marina | Recursos Hídricos y Desarrollo Sostenible
Center, Department or Service: Universidad de Alicante. Departamento de Ciencias del Mar y Biología Aplicada
Keywords: Aquaculture | Organic enrichment | Benthic fluxes | Sediment biogeochemistry | Hediste diversicolor
Knowledge Area: Zoología
Issue Date: 30-Jun-2015
Publisher: Springer International Publishing Switzerland
Citation: Biogeochemistry. 2015, June. doi:10.1007/s10533-015-0119-y
Abstract: Sediment grain size plays a major role in sediment biogeochemistry and sediments with different grain size are expected to react differently to organic enrichment. Through a mesocosm approach we tested the behavior of sediments with two types of predominant grain size (sandy and muddy sediments) under two levels of organic enrichment, related to mussel and fish farming. The polychaete Hediste diversicolor was used to simulate macrofauna bioturbation and bioirrigation. H. diversicolor stimulated organic matter (OM) mineralization and nutrient recycling. Muddy sediments had more OM from nature, resulting in higher sulfate reduction rates than sandy sediments. Under low levels of organic enrichment grain size did not have any effect on benthic fluxes (sediment oxygen uptake, total CO2, ammonium, nitrate, nitrite and phosphate). However, at high levels of organic enrichment, sandy sediments accumulated less OM, less sulfide and less ammonium than muddy sediments, while sediment oxygen uptake and total CO2 showed similar levels between sandy and muddy sediments. Thus, grain size should be considered a key parameter for site selection of fish farming facilities when aiming for a sustainable aquaculture industry.
URI: http://hdl.handle.net/10045/48105
ISSN: 0168-2563 (Print) | 1573-515X (Online)
DOI: 10.1007/s10533-015-0119-y
Language: eng
Type: info:eu-repo/semantics/article
Rights: © Springer International Publishing Switzerland 2015. The final publication is available at Springer via http://dx.doi.org/10.1007/s10533-015-0119-y
Peer Review: si
Publisher version: http://dx.doi.org/10.1007/s10533-015-0119-y
Appears in Collections:INV - Recursos Hídricos y Desarrollo Sostenible - Artículos de Revistas
INV - BM - Artículos Científicos / Scientific Papers

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