English   español  
Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/132558
Share/Impact:
Statistics
logo share SHARE logo core CORE   Add this article to your Mendeley library MendeleyBASE

Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Exportar a otros formatos:
Title

Eutrophication and acidification: Do they induce changes in the dissolved organic matter dynamics in the coastal Mediterranean Sea?

AuthorsAparicio, Francisco Luis ; Nieto-Cid, Mar ; Borrull, Encarnación ; Calvo, Eva María ; Pelejero, Carles ; Sala, M. Montserrat ; Pinhassi, Jarone; Gasol, Josep M. ; Marrasé, Cèlia
KeywordsAcidification
Eutrophication
Mesocosms
DOM
Mediterranean Sea
Optical indices
Issue Date2016
PublisherElsevier
CitationScience of the Total Environment 563-564: 179-189 (2016)
AbstractTwo mesocosms experiments were conducted in winter 2010 and summer 2011 to examine how increased pCO2 and/or nutrient concentrations potentially perturbate dissolved organic matter dynamics in natural microbial assemblages. The fluorescence signals of protein- and humic-like compounds were used as a proxy for labile and non-labile material, respectively, while the evolution of bacterial populations, chlorophyll a (Chl a) and dissolved organic carbon (DOC) concentrations were used as a proxy for biological activity. For both seasons, the presence of elevated pCO2 did not cause any significant change in the DOC dynamics (p-value < 0.05). The conditions that showed the greatest changes in prokaryote abundances and Chl a content were those amended with nutrients, regardless of the change in pH. The temporal evolution of fluorophores and optical indices revealed that the degree of humification of the organic molecules and their molecular weight changed significantly in the nutrient-amended treatment. The generation of protein-like compounds was paired to increases in the prokaryote abundance, being higher in the nutrient-amended tanks than in the control. Different patterns in the magnitude and direction of the generation of humic-like molecules suggested that these changes depended on initial microbial populations and the availability of extra nutrient inputs. Based on our results, it is expected that in the future projected coastal scenarios the eutrophication processes will favor the transformations of labile and recalcitrant carbon regardless of changes in pCO2
Description11 páginas, 6 figuras, 1 tabla
Publisher version (URL)http://dx.doi.org/10.1016/j.scitotenv.2016.04.108
URIhttp://hdl.handle.net/10261/132558
DOI10.1016/j.scitotenv.2016.04.108
ISSN0048-9697
E-ISSN1879-1026
Appears in Collections:(IIM) Artículos
(ICM) Artículos
Files in This Item:
File Description SizeFormat 
Eutrophication_acidification_2016.pdf975,45 kBAdobe PDFThumbnail
View/Open
Show full item record
Review this work
 

Related articles:


WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.