Human‐mediated introduction of introgressed deer across Wallace's line: Historical biogeography of Rusa unicolor and R. timorensis

Ecology and Evolution, Journal Year: 2017, Volume and Issue: 8(3), P. 1465 - 1479

Published: Dec. 27, 2017

Abstract In this study we compared the phylogeographic patterns of two Rusa species, unicolor and timorensis , in order to understand what drove maintained differentiation between these geographically genetically close species investigated route introduction individuals islands outside Sunda Shelf. We analyzed full mitogenomes from 56 archival samples distribution areas 18 microsatellite loci a subset 16 generate both species. Bayesian inference with fossil calibration was used estimate age each major divergence events. Our results indicated that split took place during Pleistocene, ~1.8 Mya, possibly driven by adaptations R. drier climate found on Java other Sundaland. Although markers identified well‐differentiated clades, there largely discrepant pattern mitochondrial nuclear markers. While nDNA separated into agreement their museum label, mt DNA revealed all sampled east shelf carried haplotypes one South Sumatra haplotype. show hybridization occurred sister Sundaland Late Pleistocene resulted human‐mediated hybrid descendants

Language: Английский

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Evolutionary history and patterns of divergence in three tropical east Asian squirrels across the Isthmus of Kra

Journal of Biogeography, Journal Year: 2023, Volume and Issue: 50(6), P. 1090 - 1102

Published: March 17, 2023

Abstract Aim Understanding the biotic and abiotic mechanisms underlying generation maintenance of biogeographic transitions represent long‐standing topics in evolutionary biology. The Isthmus Kra (IOK) divides Sundaland Indochina constitutes a poorly characterized terrestrial transition. Here we looked at population genetic structure three species that are distributed across IOK to gain insights into drivers have shaped this transition regional diversification patterns. Location Tropical east Asia: Indochina. Taxa Callosciurus caniceps , Tamiops mcclellandii Dremomys rufigenis‐ornatus complex (Mammalia: Rodentia: Sciuridae). Methods We generated complete mitogenomes sequences 11 nuclear intron fragments from 61 67 museum specimen samples, respectively. assessed by constructing Maximum Likelihood mitogenome phylogenies (IQTREE2), marker haplowebs conspecificity matrices (HaplowebMaker CoMa). estimated divergence dates through Bayesian phylogenetic inference (BEAST2) put these results context climatic geological history. Results High levels mitochondrial were identified all squirrels. Lineage turnover was consistent with two major mammal distribution near Kangar‐Pattani Line juncture between Thai‐Malay peninsula mainland. Divergence lineages late Pliocene/ early Pleistocene for taxa. Older Miocene/Pliocene divergences within D. T. which paraphyletic. Main Conclusions Sundaic Indochinese populations possibly diverged allopatric habitat refugia or around mountains during periods increased aridity evergreen forest contraction. Ecological differences and/or topography might influenced differentiation rainforest expansion. Alternative hypotheses remain be tested more informative markers additional geographic sampling.

Language: Английский

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Birds and barriers: present and past seas are dominant correlates of avian turnover in the Indo-Australian Archipelago

Frontiers of Biogeography, Journal Year: 2023, Volume and Issue: 15(2)

Published: April 25, 2023

The Indo-Australian Archipelago (IAA) is a geologically dynamic area of high biotic endemism that spans the continental shelves Sunda and Sahul intervening oceanic islands. We provide comprehensive quantitative assessment how bird communities are structured across IAA using beta diversity indices. focus on three key questions. Are islands Wallacea biogeographically cohesive unit or more heterogeneous transition zone? Is rich biota New Guinea East Melanesian most closely linked to Sunda, Wallacea? What geographic environmental correlates structuring region does this compare with determinants plant diversity? measure dissimilarity species composition between eleven major areas within new compilation distribution data calculate taxonomic at species, genera, family levels. To recent analyses plants, we analysed potential turnover, focusing proximity, sea barriers, land area, climatic variation. also used connectivity estimate minimum number connection events needed explain current shared taxa. found recently connected by have lower than Additionally, avifaunas little cohesion, reflecting their complex geological history. Eastern very distinctive. Where birds similar Australia, either Wallacea, depending level. Isolation through space time had strongest influence avifaunal turnover all scales, in contrast plants for which variation was predictor. Further incorporating phylogeny, biome, trait, interaction investigate processes caused fascinating biogeographic region.

Language: Английский

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Genomic phylogeography of the endemic Mountain Black‐eye of Borneo (Chlorocharis emiliae): montane and lowland populations differ in patterns of Pleistocene diversification

Journal of Biogeography, Journal Year: 2017, Volume and Issue: 44(10), P. 2272 - 2283

Published: June 21, 2017

Abstract Aim Our understanding of population diversification in the lowlands Sundaland has improved substantially over last 20 years through phylogeographical study, but we know almost nothing about mountains region. Here, apply genomic analysis and habitat modelling to phylogeography Chlorocharis emiliae , Mountain Black‐eye, an endemic montane bird Borneo with a sky‐island distribution, investigate structure interconnectivity its populations. In process, consider factors driving versus on island, how C. compares previously studied lowland species. Location Borneo. Methods Using RAD ‐seq, produced thousands SNP s 25 individuals from five populations . These represent species entire range across Genetic tree analyses were applied measure relationships connectivity. Ecological niche was used estimate distributions during current LGM time periods. Results We identified slight moderate genetic distinctiveness among all Based demographic models, isolation migration main pattern divergence, most admixture occurred three north‐eastern Borneo: Kinabalu, Trus Madi Murud. The divergent population, Pueh, north‐western Borneo, low diversity small effective size, is geographically isolated diverged without notable gene flow. results, based large dataset, contradict evolutionary earlier mitochondrial DNA study. Main conclusions Genomic comparisons indicate that driven largely by distance historical resulting also some inter‐population During Pleistocene glacial events, cooler temperatures would have caused forest descend spread, thereby increasing connectivity However, despite increased habitat, Pueh remained isolated. This contrasts patterns Bornean lowlands, where often display evidence vicariance followed secondary contact.

Language: Английский

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Interspecific aggression among parapatric and sympatric songbirds on a tropical elevational gradient

Behavioral Ecology, Journal Year: 2018, Volume and Issue: 30(2), P. 541 - 547

Published: Dec. 15, 2018

Abstract Interspecific competition is hypothesized to be a strong force that sets species range limits and drives parapatric distributions of closely related on tropical mountains. Yet, experimental evidence spatial segregation elevational gradients rare. To test whether ranges songbirds, we conducted reciprocal playback experiments 2 pairs with adjacent but nonoverlapping (parapatric) 1 pair sympatric species. We found asymmetric interspecific aggression in one (Pycnonotidae) complete absence the other (Zosteropidae). also interspecies flycatchers (Muscicapidae). Our results indicate may set some cases, it not prerequisite for parapatry. Furthermore, presence between co-occurring relatives suggests while play role limiting distributions, alone sufficient assert primary driver distributions.

Language: Английский

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