Bacillariophyta 1 Bio-assessment 1 Bioassessment 1 Bioindication 1 Biological Diatom Index 1 Biological diatom index 1 Community assembly 1 Diatoms 1 Dispersal 1 Ecological integrity Ecosystems 1 France 1 Mass effect 1 Mass effects 1 Niche process 1 Stream 1 Streams 1 Water quality 1 bioindicator 1 diatom 1 environmental conditions 1 index method 1 nutrient enrichment 1 river water 1 spatiotemporal analysis 1 water quality 1