AQUAWEB

SelDiat_RIVMORPH

Predictive model (RIVPACS type) of diatoms from three adjacent river catchments, from South to North: Lis, Mondego and Vouga) defining a total area of 11215 km2, based on taxonomic identification based on cell wall (silicic frustule) morphological and morphometric study.

Community sampling methods:

The collection of diatom assemblages and respective laboratorial treatment followed European standards (European Committee for Standardization, 2003, 2004, 2006) and has recommended by INAG (2008). When present natural hard substrate was preferred, being sampled using a hard brush.

Taxonomic level used:

At least 400 valves were counted and identified to the lowest taxonomic category possible, generally species or intra-specific rank.