Abstract
Based on the evidence of morphology and a comprehensive revision of herbarium collections and field records, the taxonomy of the Erigeronacris group in Murmansk Region, European Russia, is completely revised. Its accepted diversity is increased from 2 to 8 taxa, including putative hybrids. The only native species, E.politus, is distributed in mountainous regions, along sea coasts and in the Kutsa River basin. Five species are alien: E.rigidus (previously confused with E.acris s.str.), E.acris s.str. (first recorded in the narrow taxonomic definition), E.brachycephalus (previously unrecorded), E.droebachiensis and E.uralensis (previously reported in error). Two major waves of the introduction of alien taxa are discovered, with different occurrences and species compositions. Regional and local dispersal by pomors (historical Russian settlers) occurred during their colonisation and traditional activities since the 12th century (archaeophytes or early neophytes); such alien taxa (E.rigidus, E.brachycephalus, and partly E.acris) are particularly common within the territory traditionally settled by Russian colonists but also found elsewhere along historical trade routes. Other alien species of the E.acris group (E.droebachiensis, E.uralensis, and partly E.acris and E.brachycephalus) colonised industrial areas in the 1960s-1990s as seed contaminants introduced during revegetation of slag dumps, stockyards, dams and channels. Putative hybrids between E.politus (native), E.rigidus and E.acris (aliens) are found in the places of co-occurrence. Updated nomenclature, synonymy and descriptions are provided for all accepted taxa.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.