Ecological status and benthic macroinvertebrate communities of the fluvial network of Aragon

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Rivers play a fundamental role in the global hydrological cycle, and provide important services to humans and biodiversity. However, rivers have suffered water pollution and other anthropic aggressions for ages. Sustainable development involves that a review of the impact of human activity on rivers is necessary. This way, the Water Framework Directive (2000/60/EC), establishes a framework for the protection of inland surface waters and promotes sustainable water use. According to the Directive, the aims of this work are: (1) to evaluate the ecological status of fluvial network of Aragon (NE Spain); (2) macroinvertebrate communities classification. Two survey methods (handnet and Surber) recommended in the Directive and international ISO standards, have been compared: correlations between them are high, although Surber enhanced community assessment. In 2001 and 2002, 140 points were surveyed to assess their ecological status according to macroinvertebrate communities. Reaches with high ecological status (72) were used to categorize three communities’ types: Pyrenean, Prepyrenean Mediterranean and Iberian Mediterranean rivers. Great rivers, Ebro River and Depression rivers are poor water quality. This presentation was shown in the congress "Campus de Excelencia, Corralejo, Fuerteventura, 19-26 mayo 2006", format changes were made before upload to Slideshare, and the last two slides (published works, contac info) added.

Text of Ecological status and benthic macroinvertebrate communities of the fluvial network of Aragon

  • 1. Ecological status, benthic macroinvertebrate and odonate communities of the fluvial network of Aragon Antonio Torralba-BurrialBiologa de Organismos y Sistemas Universidad de Oviedo

2. Introduction Rivers play a fundamental role in the global hydrological cycle, and provide important services to humans and biodiversity. However, rivers have suffered water pollution and other anthropic aggressions for ages.Sustainable development involves that a review of the impact of human activity on rivers is necessary. This way, the Water Framework Directive (2000/60/EC), establishes a framework for the protection of inland surface waters and promotes sustainable water use.According to the Directive, the aims of this work are: 1. to evaluate the ecological status of fluvial network of Aragon (NE Spain) 2. macroinvertebrate communities classification 3. Survey methods WFD establishes that methods used shall conform to the international standards For macroinvertebrate communities in shallow waters of rivers, WFD remits to Surber and handnet These methods were compared in 15 sites 4. Similar results, high correlation coefficients and slopes near at 1 5. Surber presented greater average efficiency in taxa number Taxa> Surber

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