Browsing by Author "Neubert, Eike"
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- Diversity, biogeography, evolutionary relationships, and conservation of Eastern Mediterranean freshwater mussels (Bivalvia: Unionidae)Publication . Lopes-Lima, Manuel; Gürlek, Mustafa Emre; Kebapçi, Ümit; Şereflişan, Hülya; Yanık, Telat; Mirzajani, Alireza; Neubert, Eike; Prié, Vincent; Teixeira, Amílcar; Gomes-dos-Santos, André; Barros-García, David; Bolotov, Ivan N.; Kondakov, Alexander V.; Vikhrev, Ilya V.; Tomilova, Alena A.; Özcan, Tahir; Altun, Ayhan; Gonçalves, Duarte V.; Bogan, Arthur E.; Froufe, ElsaLocated at the junction between Europe, Africa, and Asia, with distinct evolutionary origins and varied ecological and geographical settings, together with a marked history of changes in orogeny and configuration of the main river basins, turned the Eastern Mediterranean into a region of high diversity and endemism of freshwater taxa. Freshwater mussels (Bivalvia, Unionidae) from the Western Palearctic have been widely studied in their European range, but little attention has been dedicated to these taxa in the Eastern Mediterranean region and their diversity and phylogeography are still poorly understood. The present study aims to resolve the diversity, biogeography, and evolutionary relationships of the Eastern Mediterranean freshwater mussels. To that end, we performed multiple field surveys, phylogenetic analyses, and a thorough taxonomic revaluation. We reassessed the systematics of all Unionidae species in the region, including newly collected specimens across Turkey, Israel, and Iran, combining COI + 16S + 28S and COI phylogenies with molecular species delineation methods. Phylogeographical patterns were characterized based on published molecular data, newly sequenced specimens, and species distribution data, as well as ancestral range estimations. We reveal that Unionidae species richness in the Eastern Mediterranean is over 70% higher than previously assumed, counting 19 species within two subfamilies, the Unioninae (14) and Gonideinae (5). We propose two new species, Anodonta seddoni sp. nov. and Leguminaia anatolica sp. nov. Six additional taxa, Unio delicatus stat. rev., Unio eucirrus stat. rev., Unio hueti stat. rev., Unio sesirmensis stat. rev., Unio terminalis stat. rev. removed from the synonymy of Unio tigridis, as well as Unio damascensis stat. rev. removed from the synonymy of Unio crassus, are re-described. The nominal taxa Unio rothi var. komarowi O. Boettger, 1880 and Unio armeniacus Kobelt, 1911 are proposed as new synonyms of Unio bruguierianus, and Anodonta cyrea Drouët, 1881 and Anodonta cilicica Kobelt and Rolle, 1895 as new synonyms of Anodonta anatina. Also, the presence of Unio tumidus in the Maritza River is confirmed. The phylogeographic patterns described here are interpreted concerning major past geological events. Conservation needs and implications are presented, together with populations and species conservation priorities.
- Integrative phylogenetic, phylogeographic and morphological characterisation of the Unio crassus species complex reveals cryptic diversity with important conservation implicationsPublication . Lopes-Lima, Manuel; Geist, Juergen P.; Egg, S.; Beran, Luboš; Bikashvili, Ani; Van Bocxlaer, Bert; Bogan, Arthur E.; Bolotov, Ivan N.; Chelpanovskaya, O.A.; Douda, Karel; Fernandes, Verónica; Gomes-dos-Santos, André; Gonçalves, Duarte Vasconcelos; Gürlek, Mustafa Emre; Johnson, Nathan A.; Karaouzas, Ioannis D.; Kebapçı, Ümit; Kondakov, Duarte Vasconcelos; Kuehn, Ralf; Lajtner, Jasna; Mumladze, Levan; Nagel, Karl Otto; Neubert, Eike; Österling, Martin E.; Pfeiffer, John M.; Prié, Vincent; Riccardi, Nicoletta; Sell, Jerzy; Schneider, Lea D.; Shumka, Spase; Sîrbu, Ioan; Skujienė, Grita; Smith, Chase H.; Sousa, Ronaldo Gomes; Stöckl, K.; Taskinen, Jouni K.; Teixeira, Amílcar; Todorov, Milcho T.; Trichkova, Teodora A.; Urbańska, Maria; Välilä, Santtu; Varandas, Simone Da Graça Pinto; Veríssimo, Joana; Vikhrev, Ilya V.; Woschitz, G.; Zając, Katarzyna; Zając, Tadeusz A.; Zanatta, David Thomas; Zieritz, Alexandra; Zogaris, Stamatis; Froufe, ElsaThe global decline of freshwater mussels and their crucial ecological services highlight the need to understand their phylogeny, phylogeography and patterns of genetic diversity to guide conservation efforts. Such knowledge is urgently needed for Unio crassus, a highly imperilled species originally widespread throughout Europe and southwest Asia. Recent studies have resurrected several species from synonymy based on mitochondrial data, revealing U. crassus to be a complex of cryptic species. To address long-standing taxonomic uncertainties hindering effective conservation, we integrate morphometric, phylogenetic, and phylogeographic analyses to examine species diversity within the U. crassus complex across its entire range. Phylogenetic analyses were performed using cytochrome c oxidase subunit I (815 specimens from 182 populations) and, for selected specimens, whole mitogenome sequences and Anchored Hybrid Enrichment (AHE) data on ∼ 600 nuclear loci. Mito-nuclear discordance was detected, consistent with mitochondrial DNA gene flow between some species during the Pliocene and Pleistocene. Fossil-calibrated phylogenies based on AHE data support a Mediterranean origin for the U. crassus complex in the Early Miocene. The results of our integrative approach support 12 species in the group: the previously recognised Unio bruguierianus, Unio carneus, Unio crassus, Unio damascensis, Unio ionicus, Unio sesirmensis, and Unio tumidiformis, and the reinstatement of five nominal taxa: Unio desectus stat. rev., Unio gontierii stat. rev., Unio mardinensis stat. rev., Unio nanus stat. rev., and Unio vicarius stat. rev. Morphometric analyses of shell contours reveal important morphospace overlaps among these species, highlighting cryptic, but geographically structured, diversity. The distribution, taxonomy, phylogeography, and conservation of each species are succinctly described.