164055 20251121161351.0 doi 10.1007/s10530-025-03707-0 sideral 146210 ART-2025-146210 eng Durán, María Exploring genomic diversity and reproductive strategies in three expansion phases of the superdominant Brachypodium rupestre in high mountain grasslands 2025 Tall-grass expansion in natural plant communities is a concern under current global change scenarios. Driven by factors such as community vulnerability and the competitive abilities of tall-grass species, this phenomenon is exemplified by Brachypodium rupestre (Host) Roem. and Schult, a perennial tall-grass native to Europe. B. rupestre spreads aggressively in the grasslands of the western Pyrenees due to a disrupted regime of lack of herbivory and recurrent burnings that has persisted over several decades. This study aims to investigate whether the contrasted managements of grazing, abandonment and burnings have promoted specific reproductive traits and impacted the population genomics of B. rupestre. Nine sites varying in cover of B. rupestre classified into three expansion phases associated to different management regimes were monitored: (i) scattered populations in multispecific grazed sites, (ii) stand populations expanding at sites of relaxed grazing or abandonment, and (iii) superdominant populations constituting dense degraded covers in recurrently burned sites. ddRADseq data showed high genomic diversity but relatively low genomic structure, likely due to substantial gene flow and the absence of wind barriers. The standardized index of association supported asexual reproduction in all populations, which is coupled with sexual reproduction. Contrasting management practices did not promote distinct genomic identities between expansion phases; rather, the genetic differentiation and divergence of populations responded to life history and spatial isolation, even within a small geographic area. The similar levels of genetic diversity and the significantly different number of clones between expansion phases suggest a complex pattern of genotypic and clonal variability, which may be influenced by environmental factors (historical disturbance regimes). Access copy available to the general public Unrestricted info:eu-repo/grantAgreement/ES/DGA-FSE/A01-23R info:eu-repo/grantAgreement/ES/MICINN/PDC2022- 133712-I00 info:eu-repo/grantAgreement/ES/MICINN/PID2020-116786RB-C31 info:eu-repo/grantAgreement/ES/MICINN/PID2022-140074NB-I00 info:eu-repo/grantAgreement/EUR/MICINN/TED2021-131073B-I00 info:eu-repo/semantics/openAccess by https://creativecommons.org/licenses/by/4.0/deed.es info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Campos, Miguel Universidad de Zaragoza Ben-Menni, Samira Sotomayor-Alge, Alba Universidad de Zaragoza Catalán, Pilar Universidad de Zaragoza (orcid)0000-0001-7793-5259 San Emeterio, Leticia Canals, Rosa Maria 5011 063 Universidad de Zaragoza Dpto. CC.Agrar.y Medio Natural Área Botánica 27, 251 (2025), [22 pp.] Biol. Invasions BIOLOGICAL INVASIONS 1387-3547 5430245 http://zaguan.unizar.es/record/164055/files/texto_completo.pdf Versión publicada 2000686 http://zaguan.unizar.es/record/164055/files/texto_completo.jpg?subformat=icon icon Versión publicada oai:zaguan.unizar.es:164055 articulos driver 2025-11-21-14:25:36 ARTICLE