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In this study, we integrate genomic, morphological and community\u2010level data within a comparative multi\u2010taxon framework to investigate genetic connectivity, demographic trajectories and eco\u2010evolutionary dynamics in four diving beetles (Coleoptera: Dytiscidae) representative of the macroinvertebrate assemblages inhabiting high altitude lakes in the Sierra Nevada massif, southeastern Iberia. Although the focal taxa share similar ecological requirements, primarily occupy lentic habitats and disperse by flight, our results reveal substantial heterogeneity in their demographic responses to the naturally fragmented distribution of alpine lakes. Taxa with higher wing loading exhibited stronger genetic differentiation among populations, probably due to their reduced capacity to disperse across the direct geographic distances separating lakes. Populations located at the range periphery tended to exhibit lower genetic diversity than central populations in all taxa. Demographic reconstructions showed a general decline in effective population size from the last glacial maximum (LGM) to the present. However, some populations of genetically more structured taxa went through brief bottlenecks that coincided with periods of warmer climate and lower lake levels, as inferred from local paleoclimatic reconstructions. Finally, the composition of macroinvertebrate assemblages (\u03b1\u2010diversity and \u03b2\u2010diversity) was not associated with intra\u2010specific genetic diversity or differentiation, suggesting that species\u2010level demographic trajectories and community\u2010level dynamics are decoupled. Our findings indicate that interspecific differences in dispersal capacity outweigh shared environmental constraints in determining the contrasting demographic trajectories of the studied taxa. Collectively, these results emphasise the importance of multi\u2010taxon approaches for understanding the dynamics of species assemblages in alpine ecosystems that are highly vulnerable to climate warming.<\/jats:p>","DOI":"10.1111\/mec.70173","type":"journal-article","created":{"date-parts":[[2025,11,13]],"date-time":"2025-11-13T11:33:14Z","timestamp":1763033594000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":1,"title":["Dispersal Capacity Rather Than Shared Environmental Constraints Determines Taxon\u2010Specific Demographic Dynamics in an Alpine Lake Network"],"prefix":"10.1111","volume":"34","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-2709-429X","authenticated-orcid":false,"given":"Joaqu\u00edn","family":"Ortego","sequence":"first","affiliation":[{"name":"Department of Ecology and Evolution Estaci\u00f3n Biol\u00f3gica de Do\u00f1ana, EBD\u2010CSIC  Seville Spain"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9710-5663","authenticated-orcid":false,"given":"Eduardo","family":"Franco\u2010Fuentes","sequence":"additional","affiliation":[{"name":"Department of Zoology, Faculty of Biology University of Seville  Seville Spain"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8677-7475","authenticated-orcid":false,"given":"Susana","family":"Pallar\u00e9s","sequence":"additional","affiliation":[{"name":"Department of Zoology, Faculty of Biology University of Seville  Seville Spain"},{"name":"Department of Ecology and Hydrology, Faculty of Biology University of Murcia  Murcia Spain"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2800-2369","authenticated-orcid":false,"given":"Jos\u00e9 A.","family":"Carbonell","sequence":"additional","affiliation":[{"name":"Department of Zoology, Faculty of Biology University of Seville  Seville Spain"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0009-0000-9152-5563","authenticated-orcid":false,"given":"Daniel","family":"Caballero\u2010Fern\u00e1ndez","sequence":"additional","affiliation":[{"name":"Department of Zoology, Faculty of Biology University of Seville  Seville Spain"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5566-5083","authenticated-orcid":false,"given":"Pedro","family":"Abell\u00e1n","sequence":"additional","affiliation":[{"name":"Department of Zoology, Faculty of Biology University of Seville  Seville Spain"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2025,11,13]]},"reference":[{"key":"e_1_2_10_2_1","doi-asserted-by":"publisher","DOI":"10.70186\/sbaeeQIGM4373"},{"key":"e_1_2_10_3_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1365\u2010294X.2009.04319.x"},{"key":"e_1_2_10_4_1","first-page":"36","article-title":"Image Processing With ImageJ","volume":"11","author":"Abramoff M. 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