<b>Spatiotemporal patterns of macroinvertebrate assemblages across mountain streams with </b><b>contrasting thermal regimes</b>

The database contains biological and environmental data collected during a survey carried across 5 stream sites of the Serio watershed (Orobic Alps, Italy) named site A, B, C, D and E. At each stream site, a monthly sampling was carried out during a one-year campaign, from June 2020 to May 2021, providing 58 samples (12 months*5 sites with two missing samples in E May and D February). Macroinvertebrates were sampled with a Surber net (0.10 m2, 500 µm mesh). For each taxon the number of individuals/1 m2 collected at each sampling is reported. The data have been used in the article: "Spatiotemporal patterns of macroinvertebrate assemblages across mountain streams with contrasting thermal regimes" written by Luca Bonacina and colleagues published in Freshwater Science. Taxonomic info: Dictyogenus_f. refers to Dictyogenus fontium -Perlodes_i. refers to Perlodes intricatus -Epeorus_al. refers to Epeorus alpicola -Epeorus_as. refers to Epeorus assimilis (or sylvicola depending on the references) -Serratella_i. refers to Serratella ignita -Elmidae_A refers to Elmidae adults -Elmidae_L refers to Elmidae larvae -Scirtidae_L refers to Scirtidae larvae Environmental info: -TMean (daily mean water temperature of the 30 days antecedent of each sampling, °C) -dTday (mean of the daily thermal variation [daily maximum – daily minimum] computed over the 30 d before each sampling occasion) -EC (electrical conductivity, uS/cm) -O2sat (oxygen saturation, %) -DO (dissolved oxygen, mg/l) -pH -NO3-N (nitric nitrogen, mg/l) -COD (Chemical oxygen demand, mg/) -HABITAT (Stream habitat availability calculated with the Shannon index applied to the relative abundance of microhabitats) -DISTURBANCE (Flood disturbance, %) -CPOM (coarse particulate organic matter, g/m2) -ALGAE (Autochtonous biomass, g/m2)