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Eutrophication and its effect on dissolved Si concentrations in the Garonne River (France)

Muylaert, Koenraad and Sanchez-Pérez, José-Miguel and Teissier, Samuel and Sauvage, Sabine and Dauta, Alain and Vervier, Philippe Eutrophication and its effect on dissolved Si concentrations in the Garonne River (France). (2009) Journal of Limnology, 68 (2). 368-374. ISSN 1129-5767

(Document in English)

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Official URL: http://dx.doi.org/10.3274/JL09-68-2-19


Dissolved nutrient and chlorophyll-a concentrations were monitored on 17 occasions and at 16 sites in the Garonne River (France). Concentrations of dissolved inorganic nitrogen (DIN) and soluble reactive phosphorus (SRP) increased about threefold downstream of the urban area of Toulouse. Chlorophyll-a concentrations increased concomitantly with DIN and SRP downstream of Toulouse. Chlorophyll-a concentrations were maximal in late winter to early spring and in summer, in-between the snow-melt driven spring flood and rainfall-driven autumn flood. Dissolved silica (DSi) concentrations were negatively correlated with chlorophyll-a concentrations, suggesting uptake by algae. DSi depletion was more severe downstream of Toulouse, suggesting that eutrophication may affect DSi consumption in the Garonne River.

Item Type:Article
Additional Information:Thanks to CNR-Institute of Ecosystem Study (ISE). The original PDF of the article can be found at Journal of Limnology website : http://www.jlimnol.it/JL_68_2/19_muylaert.pdf
HAL Id:hal-03475189
Audience (journal):National peer-reviewed journal
Uncontrolled Keywords:
Institution:Université de Toulouse > Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE)
Other partners > Katholieke Universiteit Leuven - KU LEUVEN (BELGIUM)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UT3 (FRANCE)
French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Laboratory name:
Deposited On:02 Jun 2010 13:28

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