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Vangestel C, Swaegers J, De Corte Z, Dekoninck W, Gharbi K, Gillespie R, Vandekerckhove M, Van Belleghem SM, Hendrickx F. Chromosomal inversions from an initial ecotypic divergence drive a gradual repeated radiation of Galápagos beetles. SCIENCE ADVANCES 2024; 10:eadk7906. [PMID: 38820159 PMCID: PMC11141621 DOI: 10.1126/sciadv.adk7906] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/01/2023] [Accepted: 04/30/2024] [Indexed: 06/02/2024]
Abstract
Island faunas exhibit some of the most iconic examples where similar forms repeatedly evolve within different islands. Yet, whether these deterministic evolutionary trajectories within islands are driven by an initial, singular divergence and the subsequent exchange of individuals and adaptive genetic variation between islands remains unclear. Here, we study a gradual, repeated evolution of low-dispersive highland ecotypes from a dispersive lowland ecotype of Calosoma beetles along the island progression of the Galápagos. We show that repeated highland adaptation involved selection on multiple shared alleles within extensive chromosomal inversions that originated from an initial adaptation event on the oldest island. These highland inversions first spread through dispersal of highland individuals. Subsequent admixture with the lowland ecotype resulted in polymorphic dispersive populations from which the highland populations evolved on the youngest islands. Our findings emphasize the significance of an ancient divergence in driving repeated evolution and highlight how a mixed contribution of inter-island colonization and within-island evolution can shape parallel species communities.
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Affiliation(s)
- Carl Vangestel
- Royal Belgian Institute of Natural Sciences, Brussels, Belgium
- Terrestrial Ecology Unit, Biology Department, Ghent University, Gent, Belgium
| | - Janne Swaegers
- Royal Belgian Institute of Natural Sciences, Brussels, Belgium
- Ecology, Evolution and Conservation Biology, Biology Department, University of Leuven, Leuven, Belgium
| | - Zoë De Corte
- Royal Belgian Institute of Natural Sciences, Brussels, Belgium
- Terrestrial Ecology Unit, Biology Department, Ghent University, Gent, Belgium
| | | | - Karim Gharbi
- Earlham Institute, Norwich Research Park, Norfolk, United Kingdom
| | - Rosemary Gillespie
- Department of Environmental Science, Policy, and Management, University of California, Berkeley, Berkeley, CA, USA
| | - Matthias Vandekerckhove
- Royal Belgian Institute of Natural Sciences, Brussels, Belgium
- Terrestrial Ecology Unit, Biology Department, Ghent University, Gent, Belgium
| | - Steven M. Van Belleghem
- Ecology, Evolution and Conservation Biology, Biology Department, University of Leuven, Leuven, Belgium
| | - Frederik Hendrickx
- Royal Belgian Institute of Natural Sciences, Brussels, Belgium
- Terrestrial Ecology Unit, Biology Department, Ghent University, Gent, Belgium
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Jirsová D, Štefka J, Jirků M. Discordant population histories of host and its parasite: A role for ecological permeability of extreme environment? PLoS One 2017; 12:e0175286. [PMID: 28394904 PMCID: PMC5386267 DOI: 10.1371/journal.pone.0175286] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2016] [Accepted: 03/23/2017] [Indexed: 12/24/2022] Open
Abstract
Biogeographical and ecological barriers strongly affect the course of micro-evolutionary processes in free living organisms. Here we assess the impact of a recently emerged barrier on populations of limnic fauna. Genetic diversity and population structure in a host-parasite system (Wenyonia virilis tapeworm, Synodontis schall catfish) are analyzed in the recently divided Turkana and Nile basins. The two basins, were repeatedly connected during the Holocene wet/dry climatic oscillations, following late Pleistocene dessication of the Turkana basin. Mitochondrial DNA sequences for cytochrome oxidase I gene (cox I) and a whole genome scanning method—amplified fragment length polymorphism (AFLP) were employed. A total of 347 cox I sequences (representing 209 haplotypes) and 716 AFLP fragments, as well as 120 cox I sequences (20 haplotypes) and 532 AFLP fragments were obtained from parasites and hosts, respectively. Although results indicate that host and parasite populations share some formative traits (bottlenecks, Nilotic origin), their population histories/patterns differ markedly. Mitochondrial analysis revealed that parasite populations evolve significantly faster and show remarkably higher genetic variability. Analyses of both markers confirmed that the parasites undergo lineage fission, forming new clusters specific for either freshwater or saline parts of Lake Turkana. In congruence with the geological history, these clusters apparently indicate multiple colonisations of Lake Turkana from the Nile. In contrast, the host population pattern indicates fusion of different colonisation waves. Although fish host populations remain connected, saline habitats in Lake Turkana (absent in the Nile), apparently pose a barrier to the gene flow in the parasite, possibly due to its multihost lifecycle, which involves freshwater annelids. Despite partially corroborating mitochondrial results, AFLP data was not sufficiently informative for analyzing populations with recently mixed biogeographic histories.
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Affiliation(s)
- Dagmar Jirsová
- Faculty of Science, University of South Bohemia, Branišovská, České Budějovice, Czech Republic
- Institute of Parasitology, Biology Centre, Czech Academy of Sciences, Branišovská, České Budějovice, Czech Republic
- * E-mail:
| | - Jan Štefka
- Faculty of Science, University of South Bohemia, Branišovská, České Budějovice, Czech Republic
- Institute of Parasitology, Biology Centre, Czech Academy of Sciences, Branišovská, České Budějovice, Czech Republic
| | - Miloslav Jirků
- Institute of Parasitology, Biology Centre, Czech Academy of Sciences, Branišovská, České Budějovice, Czech Republic
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Hendrickx F, Backeljau T, Dekoninck W, Van Belleghem SM, Vandomme V, Vangestel C. Persistent inter- and intraspecific gene exchange within a parallel radiation of caterpillar hunter beetles (Calosomasp.) from the Galápagos. Mol Ecol 2015; 24:3107-21. [DOI: 10.1111/mec.13233] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2015] [Revised: 05/04/2015] [Accepted: 05/06/2015] [Indexed: 01/17/2023]
Affiliation(s)
- Frederik Hendrickx
- Royal Belgian Institute of Natural Sciences; Vautierstraat 29 Brussels 1000 Belgium
- Terrestrial Ecology Unit (TEREC); Biology Department; Ghent University; K.L. Ledeganckstraat 35 Gent 9000 Belgium
| | - Thierry Backeljau
- Royal Belgian Institute of Natural Sciences; Vautierstraat 29 Brussels 1000 Belgium
- Evolutionary Ecology Group; Department of Biology; University of Antwerp; Groenenborgerlaan 171 Antwerp 2020 Belgium
| | - Wouter Dekoninck
- Royal Belgian Institute of Natural Sciences; Vautierstraat 29 Brussels 1000 Belgium
| | - Steven M. Van Belleghem
- Royal Belgian Institute of Natural Sciences; Vautierstraat 29 Brussels 1000 Belgium
- Terrestrial Ecology Unit (TEREC); Biology Department; Ghent University; K.L. Ledeganckstraat 35 Gent 9000 Belgium
| | - Viki Vandomme
- Terrestrial Ecology Unit (TEREC); Biology Department; Ghent University; K.L. Ledeganckstraat 35 Gent 9000 Belgium
| | - Carl Vangestel
- Royal Belgian Institute of Natural Sciences; Vautierstraat 29 Brussels 1000 Belgium
- Terrestrial Ecology Unit (TEREC); Biology Department; Ghent University; K.L. Ledeganckstraat 35 Gent 9000 Belgium
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