In-stream microhabitat mosaic depicts the success of mitigation measures and controls the Ecological Potential of benthic communities in heavily modified rivers.

摘要: The positive effect of mitigation measures on in-stream habitat conditions and the benthic community is recognised. In heavily modified rivers, though, response aquatic invertebrates to mosaic changes scarcely documented. We used non-metric multidimensional scaling explore leveed rivers in agricultural lowlands Northern Italy. relevance substrate microhabitat for was assessed, together with impact measures. proposed a straightforward approach quantify similarity between sites testing its statistical significance based Bayesian statistics. hypothesised that would reflect level implementation respond accordingly. Alpha, beta diversity metrics classify ecological status/potential were considered their variation tested against different levels measure implementation. Lastly, potential classification paralleled both attributes. microhabitats found at where fully implemented differed from those observed elsewhere they clearly mirrored morphological alteration Moreover, alongside alteration, main factors structure. While strictly reflected diversity, alpha status copied gradient. Microhabitat attributes most showed significant following accompanied by gradual shift classes. demonstrated importance as bridge community. Particularly when under focus, should be evaluated achieving better understanding biological responses. huge amount data available worldwide could support use river information management.