Ann. Limnol. - Int. J. Lim.
Volume 41, Number 3, September 2005
|Page(s)||175 - 182|
|Published online||15 February 2009|
Aquatic macrophytes as biological indicators of environmental conditions of rivers in north-eastern Spain
Dept. Plant Biology and Ecology, University of the Basque Country, P. O. Box 644, E-48080 Bilbao, Spain
2 Neiker, Basque Institute of Agricultural Research and Development, E-48160 Derio, Spain
3 Anbiotek, S.L., Lehendakari Agirre n° 29, E-48014 Bilbao, Spain
Corresponding author: firstname.lastname@example.org
The aim of this work was to evaluate the potential of aquatic macrophytes as biological indicators of the environmental conditions of rivers in north-eastern Spain. To this end, twenty five river basins were studied to assess the species composition and abundance of macrophytes, and to examine their relation with different geographic, morphometric, mineralization, and trophic status parameters. Of the twenty six macrophyte species found, five appeared to be useful as biological indicators of the environmental conditions of the rivers. L. minor was a good indicator of high mineralization (i.e., conductivity and Cl-) and high trophic state (especially, N-NO2-). C. stagnalis was a good indicator of high P-PO43- concentrations. P. crispus, P. polygonifolius, and R. penicillatus seemed to be useful indicators of high N-NO3- concentration. We conclude that, in our study area, aquatic macrophytes can indeed be used as biological indicators of the environmental conditions of rivers.
Key words: aquatic plant / geomorphology / high trophic state / mineralization / river / water quality
© Université Paul Sabatier, 2005
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