Dissolved organic matter fluorescence as a water-flow tracer in the tropical wetland of Pantanal of Nhecolandia, Brazil

M. Mariot; Y. Dudal; S. Furian; A. Sakamoto; V. Valles; M. Fort; Laurent Barbiero

HAL: ird-00363984, version 1

DOI: 10.1016/j.scitotenv.2007.08.003

IRD Horizon id: fdi:010040905

Short view

Export this paper

Dissolved organic matter fluorescence as a water-flow tracer in the tropical wetland of Pantanal of Nhecolandia, Brazil
Mariot M., Dudal Y., Furian S., Sakamoto A., Valles V., Fort M., Barbiero L.
Science of The Total Environment 388, 1-3 (2007) 184-193 - http://hal.ird.fr/ird-00363984

publication format:

Article in peer-reviewed journal

subject:

Life Sciences/Agricultural sciences/Soil study

title:

Dissolved organic matter fluorescence as a water-flow tracer in the tropical wetland of Pantanal of Nhecolandia, Brazil

author(s):

M. Mariot ¹, Y. Dudal ², S. Furian ³, A. Sakamoto ⁴, V. Valles ¹, M. Fort ⁵, Laurent Barbiero (

) ⁶

laboratory:

1:	Laboratoire d'Hydrogéologie d'Avignon (LHA)

	http://www.lha.univ-avignon.fr/

	Université d'Avignon : EA2665

	33 Rue Louis Pasteur 84000 Avignon

	France

2:	Unité mixte de recherche Climat Sol et Environnement (UMR CSE 1114)

	Institut national de la recherche agronomique (INRA) – Université d'Avignon

	INRA CR AVIGNON Domaine Saint-Paul Site Agroparc 84914 Avignon cedex 9

	France

3:	Laboratorio de pedologia (Laboped)

	Universidade de São Paulo

	Departamento de Geografia Universidade de São Paulo C.P. 8105, 05508-900, São Paulo

	Brazil

4:	Laboratório de Pedologia, Departamento de Geografia

	Universidade Federal do Mato Grosso do Sul

	Campus de Nova Andradina Av. Eurico Soares Andrade 1020 79750-000, Nova Andradina-MS

	Brazil

5:	Pole de recherche pour l'organisation et la diffusion de l'information géographique (PRODIG)

	http://www.prodig.cnrs.fr/

	CNRS : UMR8586 – Université Paris I - Panthéon-Sorbonne – Université Paris IV - Paris Sorbonne – Université Paris VII - Paris Diderot – Ecole Pratique des Hautes Etudes – Institut de recherche pour le développement [IRD] : UR215

	PRODIG - 2 rue Valette - 75005 Paris

	France

6:	Laboratoire des Mécanismes et Transfert en Géologie (LMTG)

	http://www.lmtg.obs-mip.fr/

	CNRS : UMR5563 – Observatoire Midi-Pyrénées – Université Paul Sabatier [UPS] - Toulouse III – Institut de recherche pour le développement [IRD] : UMR154

	14 avenue Edouard Belin 31400 Toulouse

	France

abstract:

The Nhecolandia is a sub-region of the Brazilian Pantanal wetland, where saline and freshwater lakes coexist in close proximity. Measurements of dissolved organic carbon (DOC) content and analysis of fluorescence excitation-emission matrices (EEM) were conducted in an effort to characterize spatial variability in concentration and source of dissolved organic matter (DOM) and to further understand the hydrochemical functioning of this complex environment. Increasing pH under the influence of evaporation resulted in an increasing DOC solubility ranging from 50 to over 300 mgC L-1 in surface water. Spectrofluorescence characterisation indicates the presence of several families of dissolved organic matter (fulvic and humic-type and proteinaceous materials), which are related to the type of lake and its hydro-bio-geochemical functioning. Moreover, the fluorescence signatures from lake water DOM and from surrounding soil-water-extracted organic matter (WEOM) show strong similarities although some labile proteinaceous compounds disappeared during humification. Results from the characterisation of DOM and WEOM not only suggest that spectrofluorescence is a reliable technique for the tracing of water flows, but also for the marking of the origin of organic horizons in this environment.

fulltext language:

English

journal:

Science of the Total Environment (Sci. Total Environ.)
Publisher	Elsevier
ISSN	0048-9697

Audience:

not specified

publication date:

2007

volume:

388

issue:

1-3

page, identifiant, ...:

184-193

keyword(s):

spectrofluorecence – organic matter – tracing – alkaline wetland – pantanal – Brazil

contract, financing:

Capes-Cofecub 412-03

Attached file list to this document:

PDF

STOTEN-pour_HAL.pdf

(1.3 MB)


ird-00363984, version 1
http://hal.ird.fr/ird-00363984
oai:hal.ird.fr:ird-00363984
From: Laurent Barbiero <>
Submitted on: Wednesday, 25 February 2009 07:31:44
Updated on: Wednesday, 25 February 2009 09:23:08