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
Información del item - Informació de l'item - Item information
Title: Effects of temperature and organic pollution on nutrient cycling in marine sediments
Authors: Sanz-Lázaro, Carlos | Valdemarsen, Thomas | Holmer, Marianne
Research Group/s: Biología Marina
Center, Department or Service: Universidad de Alicante. Departamento de Ciencias del Mar y Biología Aplicada
Keywords: Ocean temperature | Climate change | Coastal systems | Marine sediments | Nutrient cycling
Knowledge Area: Zoología
Issue Date: 3-Aug-2015
Publisher: Copernicus Publications | European Geosciences Union
Citation: Sanz-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, 2015
Abstract: Increasing 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.
Sponsor: CS was supported by the Ministerio de Educación y Ciencia of Spain.
URI: http://hdl.handle.net/10045/48977
ISSN: 1726-4170 (Print) | 1726-4189 (Online)
DOI: 10.5194/bg-12-4565-2015
Language: eng
Type: info:eu-repo/semantics/article
Rights: © Author(s) 2015. This work is distributed under the Creative Commons Attribution 3.0 License
Peer Review: si
Publisher version: http://dx.doi.org/10.5194/bg-12-4565-2015
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