Surface Water Quality Indicators: Phytoobentos in rivers (2021)
Description
Water quality can be valued through the biological communities they host. These communities are disrupted by the human activity and pollution associated with this activity. The study of the flora and fauna found in an aquatic ecosystem, in front of the expected fauna and flora, allows to measure the situation of the ecosystem with respect to pollution.
The biological indicators selected come from the study of the biological quality elements provided for in the assessment of ecological status in the Water Framework Directive 2000/60/EC (WFD), and the indices selected for each typology in the RDSE, since this information is regularly studied by means of standardised analyses that allow the collection of annual and quality data.
In the case of continental surface waters rivers, the indicator will be configured from the data of phytobents and macroinvertebrates benthic, evaluated according to what is established in the RDSE for each typology.
In the case of both taxonomic groups, the use of different indices is contemplated according to the type of river in which it is studied. Despite their different approaches, the expected indices assess the situation of the river with respect to a pressure, scoring each taxon found according to its ability to tolerate it. The greater the taxonomic diversity of the section to be studied and the greater number of pressure-intolerant taxa, the better the section will be in an environmental situation.
To draw up the graphs of the situation in rivers through the phytoobentos, it has been taken into account whether the indices applied to the phytoobentos analyses exceed the limit established in the RDSE, between the good and moderate status for each type of river, or do not exceed it. In addition, the typologies without legal limit have been recorded as “No Valuation”.
Resources
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https://www.mapama.es/app/descargas/descargafichero.aspx?f=fitobentos_sup_inf_calidad_2021.zip |
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https://wms.mapama.gob.es/sig/Agua/IASUP/2021/Fitobentos/wms.aspx?request=getcapabilities&service=wms |