Variacions en el procés de la retenció de nutrients associades al desenvolupament algal en el riu de Perles (vall d'Alinyà, Alt Urgell)

Authors

  • Vicenç Acuña i Salazar

Abstract

Self-depuration capacity was studied in three reaches of Perles river (Alinyà Valley, Alt Urgell), a fourth order stream that drains a calcareous watershed where there is a focussal nutrient input of antropic origin in the headwaters and a progressive decrease in nutrient concentration downstream. The studied reaches were similar in hidrology and geomorphology but showing differences in nutrient concentration and biologic communities. The objective of this study was to contrast the self-depuration capacity in relation to biologycal community differences. Results showed that communities with higher recovery values of filamentous algaes from reaches with a moderate nutrient concentration, had a higher self-depuration capacity than communities with smaller recovery values of filamentous algaes from poor nutrient reaches.

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Published

2004-03-02

Issue

Vol. 70 : 2002

Section

Articles

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