Inter- and intra-archipelago dynamics of population structure and gene flow in a Polynesian bird

Mapel, Xena Marie; Gyllenhaal, Ethan F.; Modak, Tejashree; DeCicco, Lucas H.; Naikatini, Alivereti; Utzurrum, Ruth B.; Seamon, Joshua O.; Cibois, Alice; Thibault, Jean‐Claude; Sorenson, Michael D.; Moyle, Robert G.; Barrow, Lisa N.; Andersen, Michael J.

doi:10.1016/j.ympev.2020.107034

Cited by 9 publications

(5 citation statements)

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“…Honeyeaters are well established as good dispersers and have longer and more projected wings compared to their meliphagoid relatives [ 29 , 70 ]. Vicariance events have been suggested to have acted in this group [ 53 , 71 ], but to date, evidence for speciation in honeyeaters has predominantly supported the role of dispersal events throughout Indonesia and the South Pacific [ 53 , 55 , 72 ], associated with their nectarivorous lifestyle [ 35 , 70 ]. Although we confirm the results of previous honeyeater studies which have suggested that dispersal has been key to honeyeater speciation especially in island species [ 53 , 55 ], we find that vicariant patterns associated with a large range size mechanism in the continental setting is also important.…”

Section: Discussionmentioning

confidence: 99%

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Geographic range size and speciation in honeyeaters

2022

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Background Darwin and others proposed that a species’ geographic range size positively influences speciation likelihood, with the relationship potentially dependent on the mode of speciation and other contributing factors, including geographic setting and species traits. Several alternative proposals for the influence of range size on speciation rate have also been made (e.g. negative or a unimodal relationship with speciation). To examine Darwin’s proposal, we use a range of phylogenetic comparative methods, focusing on a large Australasian bird clade, the honeyeaters (Aves: Meliphagidae). Results We consider the influence of range size, shape, and position (latitudinal and longitudinal midpoints, island or continental species), and consider two traits known to influence range size: dispersal ability and body size. Applying several analytical approaches, including phylogenetic Bayesian path analysis, spatiophylogenetic models, and state-dependent speciation and extinction models, we find support for both the positive relationship between range size and speciation rate and the influence of mode of speciation. Conclusions Honeyeater speciation rate differs considerably between islands and the continental setting across the clade’s distribution, with range size contributing positively in the continental setting, while dispersal ability influences speciation regardless of setting. These outcomes support Darwin’s original proposal for a positive relationship between range size and speciation likelihood, while extending the evidence for the contribution of dispersal ability to speciation.

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Section: Discussionmentioning

confidence: 99%

“…The island setting is clearly characterised by dispersal-associated speciation. High dispersal ability typically improves the ability of species to reach oceanic islands, increasing rates of diversification, which frequently play key roles in avian speciation [ 16 ], as found for the honeyeaters [ 53 , 55 , 72 ].…”

Section: Discussionmentioning

confidence: 99%

Geographic range size and speciation in honeyeaters

2022

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“…However, they were biased to taxa that have undergone strong phenotypic or genomic divergence on islands (e.g., Wang et al 2016; Van Doren et al 2017; Delmore et al 2020; Recuerda et al 2021), where post-divergence gene flow from islands may be prevented. Our scenario focuses on the system where organisms form a metapopulation in the archipelagic or land-bridge island system (Seki et al 2007; Mapel et al 2021; Tsujimoto et al 2023), where populations may have been dynamically maintained. In fact, some Japanese endemic lineages have extended their ranges to the far eastern edge of the Eurasian continent (e.g.…”

Section: Discussionmentioning

confidence: 99%

Phylogenomics reveals an island as a genetic reservoir of a continental population

Aoki,

Senzaki,

Ando

et al. 2023

Preprint

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AimIslands can become sources of continental biodiversity through reverse colonization. This is contradicted by the classic view of islands as sinks, because microevolution predicts difficulties in continental colonization by small island populations that are genetically depauperate. We fill this gap by examining historical demography that contributed to genetic variation of a continental population after reverse colonization. We exploit a rail species that likely evolved through reverse colonization, challenging the expectation that rails are the representatives of “end-of-colonization” on islands.LocationContinental East Asia (Russian Far East), Japanese ArchipelagoTaxaSwinhoe’s Rail (Coturnicops exquisitus)MethodsTo confirm reverse colonization, therein a continental population is derived from an island lineage, we reconstruct a complex phylogenetic relationship considering gene flow and introgression. We apply multiple methods using both high-throughput sequencing and mitochondrial datasets. We reconstruct a comprehensive demographic history of the species based on historical trajectory inference by Stairway Plot 2, fastsimcoal2 demographic modeling, and species distribution modeling. We assess genetic variation of the continental population and the key demographic process underlying them.ResultsThe continental population is inferred as a derived group within an island lineage, supporting reverse colonization. Demographic reconstruction suggests a significant population size decline through reverse colonization, with intraspecific gene flow from the island population. Introgression from an American sister species into the continental population is supported, which may be responsible for the unexpectedly high genetic variation observed.Main conclusionsUsing phylogenomics, we reconstruct reverse colonization associated with a complex history of population size changes and gene flow. Introgression, particularly, plays a pivotal role in rapidly restoring advantageous genetic variation for persistence and expansion on the continent post-reverse colonization. In theory, introgression assists adaptive radiation and diversification. Thus, our findings facilitate an understanding of the processes that islands contribute to global biodiversity, thereby bridging a gap between micro- and macroevolution.

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“…Other processes such as hybridization and introgression between involved species in the secondary contact zones may also have important evolutionary consequences for speciation, especially at the early stages of speciation when reproductive barriers may be weak (Bertrand et al, 2017;Cortés-Ortiz et al, 2019;Coyner et al, 2015;Sardell & Uy, 2016;Souissi et al, 2018). There has been evidence that gene flow re-established by hybridization and introgression may lead to genetic re-admixture between closely related species living in sympatry (Mapel et al, 2021;Martin et al, 2015;Seehausen, 2006). Environmental change as one of the most serious challenging concerns poses multiple threats to organisms, results in shifts in species distribution, and alters interspecific interactions by breaking the physical (geographical) barriers of reproductive isolation and thus the chances of hybridization and introgression (Bellard et al, 2012;Mammola et al, 2019;Parmesan, 2006;Zhang, Mammola, et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

Climate warming will increase chances of hybridization and introgression between two Takydromus lizards (Lacertidae)

Guo

Zhong

Xie

et al. 2021

Ecology and Evolution

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Coexisting species may experience population and range changes alone or jointly in response to environmental change. Here, we used six climate variables and ten modeling algorithms to predict the distribution of two Takydromus species ( T . septentrionalis and T . sexlineatus ) in China. We identified the sympatric and allopatric areas by comparing projections between the two species based on habitat suitability under present and future climate scenarios. We constructed the hypervolumes of six climate variables for the two species and then evaluated overlaps between hypervolumes. From this study, we know the following. First, minimum temperature of coldest month contributes the most to the prediction of habitat suitability. Second, habitats suitable for the two species will shift northward in response to climate warming. Third, the range of T. sexlineatus will expand across the four future time intervals before 2,100, namely the 2021–2040, 2041–2060, 2061–2080, and 2081–2100 intervals, under both Shared socioeconomic pathway (SSP) 245 and SSP585 scenarios, and the range of T. septentrionalis will also expand in the future except at the 2081–2100 interval under the SSP585 scenario. Fourth, the sympatric areas will contract or expand under the SSP245 scenario and expand across the four future time intervals before 2,100 under the SSP585 scenario. Fifth, the niche hypervolumes of the two species partially overlapped, and the differences in niche centroid show some degree of niche differentiation between the two species. These results allow to conclude that climate warming will not only drive the northward drift of sympatric areas but also increase the size of these areas if nothing is done to limit the emission of greenhouse gases. Given the existence of hybridization and introgression between T. septentrionalis and T. sexlineatus in the field where they coexist, we also conclude that climate warming will increase chances of hybridization and introgression between the two species.

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Inter- and intra-archipelago dynamics of population structure and gene flow in a Polynesian bird

Cited by 9 publications

References 70 publications

Geographic range size and speciation in honeyeaters

Geographic range size and speciation in honeyeaters

Phylogenomics reveals an island as a genetic reservoir of a continental population

Climate warming will increase chances of hybridization and introgression between two Takydromus lizards (Lacertidae)

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