The Hyalella (Crustacea: Amphipoda) species cloud of the ancient Lake Titicaca originated from multiple colonizations

dc.creatorAdamowicz, Sarah J.
dc.creatorMarinone, Maria Cristina
dc.creatorMenu Marque, Silvina
dc.creatorMartin, Jeffrey W.
dc.creatorAllen, Daniel C.
dc.creatorPyle, Michelle N.
dc.creatorDe los Rios, Patricio
dc.creatorSobel, Crystal N.
dc.creatorIbanez, Carla
dc.creatorPinto, Julio
dc.creatorWitt, Jonathan D. S.
dc.date2018
dc.date2021-04-30T17:06:05Z
dc.date2021-04-30T17:06:05Z
dc.date.accessioned2021-06-14T22:07:35Z
dc.date.available2021-06-14T22:07:35Z
dc.identifierMOLECULAR PHYLOGENETICS AND EVOLUTION,Vol.125,232-242,2018
dc.identifierhttp://repositoriodigital.uct.cl/handle/10925/4009
dc.identifier10.1016/j.ympev.2018.03.004
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/3301104
dc.descriptionAncient lakes are renowned for their exceptional diversity of endemic species. As model systems for the study of sympatric speciation, it is necessary to understand whether a given hypothesized species flock is of monophyletic or polyphyletic origin. Here, we present the first molecular characterization of the Hyalella (Crustacea: Amphipoda) species complex of Lake Titicaca, using COI and 28S DNA sequences, including samples from the connected Small and Large Lakes that comprise Lake Titicaca as well as from a broader survey of southern South American sites. At least five evolutionarily distant lineages are present within Lake Titicaca, which were estimated to have diverged from one another 12-20 MYA. These major lineages are dispersed throughout the broader South American Hyalella phylogeny, with each lineage representing at least one independent colonization of the lake. Moreover, complex genetic relationships are revealed between Lake Titicaca individuals and those from surrounding water bodies, which may be explained by repeated dispersal into and out of the lake, combined with parallel intralacustrine diversification within two separate clades. Although further work in deeper waters will be required to determine the number of species present and modes of diversification, our results strongly indicate that this amphipod species cloud is polyphyletic with a complex geographic history.
dc.languageen
dc.publisherACADEMIC PRESS INC ELSEVIER SCIENCE
dc.sourceMOLECULAR PHYLOGENETICS AND EVOLUTION
dc.subjectAncient lakes
dc.subjectSpecies flocks
dc.subjectSympatric speciation
dc.subjectEvolutionary radiation
dc.subjectLake Titicaca
dc.titleThe Hyalella (Crustacea: Amphipoda) species cloud of the ancient Lake Titicaca originated from multiple colonizations
dc.typeArticle


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