20.500.12556/RUL-135011 Distribution of the macrophyte communities in the Danube reflects river serial discontinuity The Danube is the second-longest river in Europe that is subjected to various man-made alterations, including those related to hydro-power plants. We surveyed and analyzed the presence and abundance of macrophytes in the main channel from 2582 river kilometers (rkm) to 171 rkm. We also assessed selected habitat parameters in the sampled river stretches. Sixty-eight different plant species were recorded along the entire course. Among neophytes, we found Elodea nuttallii, E. canadensis, Vallisneria spiralis and Azolla filiculoides. Based on similarity analysis, we distinguished 15 plant communities, most of which were defined as associations, which were classified into 5 alliances and represented three vegetation classes, namely vegetation of rooted hydrophytes Potamogetonetea, the vegetation of pleustophytes Lemnetea and vegetation of marshes Phragmitetea. The number and abundance of plant species, as well as plant communities recorded in single stretches, varied along the course. Canonical correspondence analysis (CCA) revealed that environmental parameters explained 21% of plant species composition. CCA runs with neophytes explained 41% of the variance, and current velocity, water transparency, species number and bank structure were significant variables. The present study revealed that the free-running sections of the river are poor in number and abundance of plant species, whereas impounded reaches mainly show an opposite result. Danube large river macrophytes neophytes plant communities distribution Donava velike reke makrofiti neofiti rastlinske združbe razširjenost true false true Angleški jezik Slovenski jezik Članek v reviji 2022-02-17 10:11:38 2022-02-17 10:11:38 2022-09-14 04:11:11 0000-00-00 00:00:00 2021 0 0 24 str. iss. 7, art. 918 Vol. 13 Apr. 2021 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 574 2073-4441 10.3390/w13070918 58377987 RAZ_Janauer_Georg_A._2021.pdf RAZ_Janauer_Georg_A._2021.pdf 1 DBF490DAABBFB2D7448E5F6CB7BB2944 746c2ac3a4bca9a7dcb9ca1ebe5b7dc904c03dc5cf70316364ea05996de8eddf 69322881-8fd3-11ec-abdb-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=153825 https://www.mdpi.com/2073-4441/13/7/918 0 5f219751-8fd1-11ec-abdb-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=153824 Biotehniška fakulteta 0 0 0