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Island- and lake-like parallel adaptive radiations replicated in rivers

ED. Burress, L. Piálek, JR. Casciotta, A. Almirón, M. Tan, JW. Armbruster, O. Říčan,

. 2018 ; 285 (1870) : .

Language English Country England, Great Britain

Document type Journal Article, Research Support, Non-U.S. Gov't, Research Support, U.S. Gov't, Non-P.H.S.

Persistent link   https://www.medvik.cz/link/bmc19012952

Parallel adaptive radiations have arisen following the colonization of islands by lizards and lakes by fishes. In these classic examples, parallel adaptive radiation is a response to the ecological opportunities afforded by the colonization of novel ecosystems and similar adaptive landscapes that favour the evolution of similar suites of ecomorphs, despite independent evolutionary histories. Here, we demonstrate that parallel adaptive radiations of cichlid fishes arose in South American rivers. Speciation-assembled communities of pike cichlids (Crenicichla) have independently diversified into similar suites of novel ecomorphs in the Uruguay and Paraná Rivers, including crevice feeders, periphyton grazers and molluscivores. There were bursts in phenotypic evolution associated with the colonization of each river and the subsequent expansion of morphospace following the evolution of the ecomorphs. These riverine clades demonstrate that characteristics emblematic of textbook parallel adaptive radiations of island- and lake-dwelling assemblages are feasible evolutionary outcomes even in labile ecosystems such as rivers.

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$a Piálek, Lubomír $u Department of Zoology, Faculty of Science, University of South Bohemia, České Budějovice, Czech Republic.
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$a Casciotta, Jorge R $u División Zoologia Vertebrados, Facultad de Ciencias Naturales y Museo, Universidad Nacional de La Plata, Buenos Aires, Argentina. Comisión de Investigaciones Científicas de la Provincia de Buenos Aires, Buenos Aires, Argentina.
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$a Almirón, Adriana $u División Zoologia Vertebrados, Facultad de Ciencias Naturales y Museo, Universidad Nacional de La Plata, Buenos Aires, Argentina.
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