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|Title:||A Biotic Index Using Benthic Macroinvertebrates for Italian Lakes|
|Authors:||ROSSARO B.; MARZIALI L.; CARDOSO ANA; SOLIMINI ANGELO; FREE GARY; GIACCHINI R.|
|Citation:||Ecological Indicators vol. 7 p. 412-429|
|Type:||Articles in periodicals and books|
|Abstract:||The relationships between benthic macroinvertebrates and environmental variables from 42 Italian lakes were analyzed with the aim of developing a biotic index. A trophic status index was calculated ranking oxygen % saturation (O2 %sat), transparency (transp) and total phosphorus (TP). The means of O2 % sat, transp, TP weighted by the species abundances were calculated to have optimum values for each species; a benthic quality index was then obtained multiplying the weighted means of O2 % sat, transp, TP by species abundances, dividing the product by the total number of specimens present at each station. A significant correlation was observed between trophic status and benthic quality index. A good agreement was also observed between the indexes calculated using the large and restricted database.|
|JRC Institute:||Sustainable Resources|
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