A global synthesis of naturalised and invasive plants in aquatic habitats

Global databases have contributed to our understanding of alien, naturalised and invasive plant species distributions. Still, the role of species invasions in habitats, specifically in aquatic habitats, remains underexplored at the global scale. Accordingly, a comprehensive global synthesis of the status of plant invasions in aquatic habitats has been missing. Here, we focus on macroecological patterns of naturalised non-invasive and invasive plants in aquatic habitats using the recently built SynHab database. Amongst all the plant records compiled in SynHab, 592 are assigned to aquatic habitats, of which 183 are unique plant taxa (further termed ‘species’) belonging to 49 families. Of the total number of records, 462 refer to taxa with naturalised non-invasive occurrences and 130 to invasive occurrences. The species pool analysed here refers to 78 regions distributed across all botanical continents as defined by the World Geographical Scheme for Recording Plant Distributions. The number of naturalised non-invasive aquatic species is similar across different continents and biomes, but Tropical Asia had more and the Mediterranean zonobiome had fewer invasive species than expected. Tropical Asia, Temperate Asia and Africa have the highest proportions of naturalised species that have become invasive, while across continents, invasive proportions were highest for tropical and subtropical zonobiomes. New Zealand, Italy and California contained disproportionately more naturalised species than expected, given the area covered by aquatic habitat in those regions, whereas South Sudan, Papua New Guinea and Kyrgyzstan had disproportionately fewer species. In pairwise dissimilarity comparisons, all continents had distinct species compositions (from 0.73 to 0.92 of the Jaccard dissimilarity index) and so did zonobiomes (0.69 to 1.00). The high proportion of invasive species in Tropical Asia in comparison with terrestrial invasions in this region, indicates a greater susceptibility of warmer regions to aquatic plant invasions. This may be exacerbated by further naturalisations in the future, as data from temperate regions suggest a larger pool of available species

Flora dynamics and the problem of vegetation cover safety in the Volga basin

The general data of flora dynamics in the Volga basin and problems of its protection are presented. The flora dynamics are characterized through a) introduction of alien or non-native species, b) disappearance of certain species, c) appearance of new taxons. The red book of the Volga basin is one of the tools useful for the protection of vegetable cover. The red book underlies the principles of protection of rare species through the preservation of their environment.The general data of flora dynamics in the Volga basin and problems of its protection are presented. The flora dynamics are characterized through a) introduction of alien or non-native species, b) disappearance of certain species, c) appearance of new taxons. The red book of the Volga basin is one of the tools useful for the protection of vegetable cover. The red book underlies the principles of protection of rare species through the preservation of their environment

Flora dynamics and the problem of vegetation cover safety in the Volga basin

The general data of flora dynamics in the Volga basin and problems of its protection are presented. The flora dynamics is characterized through: a) introduction of alien or non-native species, b) disappearance of certain species, c) appearance of new taxons. The red book of the Volga basin is one of the tools useful for the protection of vegetable cover. The red book underlies the principles of protection of rare species through the preservation of their environment.</jats:p

Flora dynamics and the problem of vegetation cover protection in the Volga basin

The general data of flora dynamics in the Volga basin and problems of its protection are presented. The flora dynamics is characterized through: a) introduction of alien or non-native species, b) disappearance of certain species, c) appearance of new taxons. !e red book of the Volga basin is one of the tools useful for protection of vegetable cover. The red book underlies principles of protection of rare species through preservation of their environment

Floristic areas of the Middle Volga region: materials to the analysis

The publication presents some quantitative characteristics of the 17 pre-selected floristic areas of the Middle Volga region (the total number of species, number of indigenous taxa and the number of differentiating species). Based on the available data, a linear regression is constructed, illustrating the relative dominance of allochthonous or autochthonous trends in the development of flora in the selected areas. The cluster analysis of the species lists of the floristic areas was completed, and then DCA-ordination of the selected areas was implemented. It is revealed that the forest-steppe areas of the Cis-Volga and Trans-Volga regions are situated by the level of species richness, and the number of species in the selected floristic areas is increasing from West and East towards the Volga

Estimation of the rare status of <i>Iris aphylla</i> L. according to the categories and criteria of the IUCN Red list in the western and eastern edge of the East European plain

The article contains information on assessing the environmental status of Iris aphylla populations according to the categories and criteria of the IUCN Red List. It was found that in Gomel Oblast (Republic of Belarus) and Samara Oblast (Russian Federation), I. aphylla is characterized as “Vulnerable” (VU). The resulting categories reflect the specifics of regional conditions affecting populations.</jats:p