The closer the better? Relative influence of forest continuity and distance to water on the taxonomic and functional structure of riparian plant communities along headwater streams

Questions (a) Is forest temporal continuity an important factor in structuring the riparian plant communities along small alluvial valleys? (b) To what extent can distance from stream modulate effect of and provide a better understanding taxonomic functional structure these communities? Location Ouanne watershed, France. Methods We used paired-samples design, involving stands close to far stream, ancient or recent forests, which we studied vegetation. performed analyses species richness cover, as well mean values preferences traits, measures composition, distinguishing between understorey overstorey. Results Strong differences values, were found forests. Ancient forests characterized by with dominant stress-tolerant strategy, whereas dominated hygrophilous nitrophilous competitive strategy. Furthermore, that encompassed larger species, than pattern mostly driven greater co-occurrence ruderal rapid leaves turnover but also species. Conclusions In headwater streams, have shown past human activities leave still detectable traces contemporary communities. addition, pointed out colonization indicator was faster closer stream. This underscores need protect remaining are connected even if they small, suggests bank reforestation restoration hydrological connectivity on rivers fragmented artificial barriers may be effective way increase biodiversity zones.