Reference : Macrophytes: Limitations of Using Them to Assess Reservoir Status According to the Wa...
Scientific journals : Article
Life sciences : Environmental sciences & ecology
http://hdl.handle.net/2268/161228
Macrophytes: Limitations of Using Them to Assess Reservoir Status According to the Water Framework Directive
English
Sossey Alaoui, Khadija mailto [Université de Liège - ULiège > DER Sc. et gest. de l'environnement (Arlon Campus Environ.) > DER Sc. et gest. de l'environnement (Arlon Campus Environ.) >]
Galoux, Daniel mailto [> >]
Rosillon, Francis mailto [Université de Liège - ULiège > DER Sc. et gest. de l'environnement (Arlon Campus Environ.) > DER Sc. et gest. de l'environnement (Arlon Campus Environ.) >]
Dec-2013
International Journal of Water Sciences
InTech
Yes (verified by ORBi)
International
1848-929X
Rijeka
Croatia
[en] Aquatic Vegetation ; Walloon Reservoirs ; Ecological Indices ; Ecological Potential ; WFD
[en] Macrophytes are among the major groups of organisms that the Water Framework Directive (WFD) recommends should be used in assessing the status of natural lakes. The use of macrophytes in reservoir monitoring is still limited and further studies are needed on their inter-calibration and sources of variation. Many status assessment methods based on macrophyte communities have been defined for lakes. Nevertheless, few of them have been tested for reservoirs. The purpose of the study is to highlight the limitations of using macrophytes to assess reservoir status according to the Water Framework Directive.
An assessment of macrophyte composition and abundance and of water quality was carried out in nine Walloon reservoirs between 2010 and 2012. The main limitations of the macrophyte approach for assessing these reservoirs were: i) geographical features; ii) physical variables; iii) lack of ecological information on the various macrophytic groups, such as helophytes, algae and mosses. We used two assessment methods to test the relevance of using macrophyte communities to assess reservoir status: the Flanders (Belgium) method (BE-FL method) and the United Kingdom method (UK method). The relationships between macrophyte metrics for both methods and nutrient enrichment were examined. Highly significant correlations were found between the chemical variables O-P [mg P/l]), Total P (µg P/l), Conductivity (µS/cm) and the trophic UK-metric (Lake Macrophyte Nutrient) (LMNI), as well as between such variables and the abundance of Bl-FL "disturbance indicators" metric(V). The UK "group of macrophyte species" metric provided limited information on the quality or degrees of degradation in the environment from which the sample was taken.
DEMNA
SPW - Service Public de Wallonie
L’étude de la biodiversité des cours d'eau et des réservoirs de barrage wallons et l'évaluation de leur qualité
Researchers ; Professionals ; Students ; General public ; Others
http://hdl.handle.net/2268/161228

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