Effects of temperature and organic pollution on nutrient cycling in marine sediments

Please use this identifier to cite or link to this item: http://hdl.handle.net/10045/48977
Full metadata record
Full metadata record
DC FieldValueLanguage
dc.contributorBiología Marinaes
dc.contributor.authorSanz-Lázaro, Carlos-
dc.contributor.authorValdemarsen, Thomas-
dc.contributor.authorHolmer, Marianne-
dc.contributor.otherUniversidad de Alicante. Departamento de Ciencias del Mar y Biología Aplicadaes
dc.identifier.citationSanz-Lázaro, C., Valdemarsen, T., and Holmer, M.: Effects of temperature and organic pollution on nutrient cycling in marine sediments, Biogeosciences, 12, 4565-4575, doi:10.5194/bg-12-4565-2015, 2015es
dc.identifier.issn1726-4170 (Print)-
dc.identifier.issn1726-4189 (Online)-
dc.description.abstractIncreasing ocean temperature due to climate change is an important anthropogenic driver of ecological change in coastal systems. In these systems sediments play a major role in nutrient cycling. Our ability to predict ecological consequences of climate change is enhanced by simulating real scenarios. Based on predicted climate change scenarios, we tested the effect of temperature and organic pollution on nutrient release from coastal sediments to the water column in a mesocosm experiment. PO43− release rates from sediments followed the same trends as organic matter mineralization rates, increased linearly with temperature and were significantly higher under organic pollution than under nonpolluted conditions. NH4+ release only increased significantly when the temperature rise was above 6 °C, and it was significantly higher in organic polluted compared to nonpolluted sediments. Nutrient release to the water column was only a fraction from the mineralized organic matter, suggesting PO43− retention and NH4+ oxidation in the sediment. Bioturbation and bioirrigation appeared to be key processes responsible for this behavior. Considering that the primary production of most marine basins is N-limited, the excess release of NH4+ at a temperature rise > 6 °C could enhance water column primary productivity, which may lead to the deterioration of the environmental quality. Climate change effects are expected to be accelerated in areas affected by organic pollution.es
dc.description.sponsorshipCS was supported by the Ministerio de Educación y Ciencia of Spain.es
dc.publisherCopernicus Publicationses
dc.publisherEuropean Geosciences Uniones
dc.rights© Author(s) 2015. This work is distributed under the Creative Commons Attribution 3.0 Licensees
dc.subjectOcean temperaturees
dc.subjectClimate changees
dc.subjectCoastal systemses
dc.subjectMarine sedimentses
dc.subjectNutrient cyclinges
dc.titleEffects of temperature and organic pollution on nutrient cycling in marine sedimentses
Appears in Collections:INV - BM - Artículos Científicos / Scientific Papers

Files in This Item:
Files in This Item:
File Description SizeFormat 
Thumbnail2015_Sanz_etal_Biogeosciences.pdf175,76 kBAdobe PDFOpen Preview

This item is licensed under a Creative Commons License Creative Commons