نتایج جستجو برای: phylogeography

تعداد نتایج: 3088  

2017
Lucía Graña-Miraglia Luis F. Lozano Consuelo Velázquez Patricia Volkow-Fernández Ángeles Pérez-Oseguera Miguel A. Cevallos Santiago Castillo-Ramírez

Genome sequencing has been useful to gain an understanding of bacterial evolution. It has been used for studying the phylogeography and/or the impact of mutation and recombination on bacterial populations. However, it has rarely been used to study gene turnover at microevolutionary scales. Here, we sequenced Mexican strains of the human pathogen Acinetobacter baumannii sampled from the same loc...

Journal: :Proceedings. Biological sciences 1998
J C Avise D Walker G C Johns

An approach applied previously to avian biotas is extended in this paper to other vertebrate classes to evaluate Pleistocene phylogeographic effects and to estimate temporal spans of the speciation process (speciation durations) from mitochondrial (mt) DNA data on extant taxa. Provisional molecular clocks are used to date population separations and to bracket estimates of speciation durations b...

2017
Lan-Hai Wei Shi Yan Yik-Ying Teo Yun-Zhi Huang Ling-Xiang Wang Ge Yu Woei-Yuh Saw Rick Twee-Hee Ong Yan Lu Chao Zhang Shu-Hua Xu Li Jin Hui Li

Austronesian diffusion is considered one of the greatest dispersals in human history; it led to the peopling of an extremely vast region, ranging from Madagascar in the Indian Ocean to Easter Island in Remote Oceania. The Y-chromosome haplogroup O3a2b*-P164(xM134), a predominant paternal lineage of Austronesian populations, is found at high frequencies in Polynesian populations. However, the in...

Journal: :Molecular ecology 2008
Daniel E Ruzzante Sandra J Walde John C Gosse Victor E Cussac Evelyn Habit Tyler S Zemlak Emily D M Adams

Changes in lake and stream habitats during the growth and retreat of Pleistocene glaciers repeatedly altered the spatial distributions and population sizes of the aquatic fauna of the southern Andes. Here, we use variation in mtDNA control region sequences to infer the temporal dynamics of two species of southern Andean fish during the past few million years. At least five important climate eve...

2013
Benito A. González Horacio Samaniego Juan Carlos Marín Cristián F. Estades

Niche description and differentiation at broad geographic scales have been recent major topics in ecology and evolution. Describing the environmental niche structure of sister taxa with known evolutionary trajectories stands out as a useful exercise in understanding niche requirements. Here we model the environmental niche structure and distribution of the recently resolved phylogeography of gu...

2011
Christopher Irwin Smith Shantel Tank William Godsoe Jim Levenick Eva Strand Todd Esque Olle Pellmyr

Comparative phylogeographic studies have had mixed success in identifying common phylogeographic patterns among co-distributed organisms. Whereas some have found broadly similar patterns across a diverse array of taxa, others have found that the histories of different species are more idiosyncratic than congruent. The variation in the results of comparative phylogeographic studies could indicat...

Journal: :Molecular phylogenetics and evolution 2012
Philip-Sebastian Gehring Maciej Pabijan Jasmin E Randrianirina Frank Glaw Miguel Vences

We analyzed the influence of large rivers on the phylogeography of endemic widespread amphibians along Madagascar's east coast, using as models various species and species complexes of Malagasy reed frogs (Heterixalus spp.) that are specialized to either highland or lowland habitats. We assembled a dense sampling across the full species ranges and used mitochondrial (cob) as well as nuclear (Ra...

2016
Geng-Ping Zhu Zhen Ye Juan Du Dan-Li Zhang Ya-hui Zhen Chen-guang Zheng Li Zhao Min Li Wen-Jun Bu

Invasive species' Pleistocene history contains much information on its present population structure, dispersability and adaptability. In this study, the Pleistocene history of a global invasive pest (Brown Marmorated Stink Bug BMSB, Halyomorpha halys) was unveiled using the coupled approach of phylogeography and ecological niche modelling. Rangewide molecular data suggests that the Taiwan and o...

Journal: :Vertebrate Zoology 2022

Species-level phylogeny and especially phylogeography of African chelonians is a comparatively under-studied field research. We review the current knowledge phylogeography, highlight congruence spatial phylogeographic patterns amongst other taxa suggest future research directions to address gaps in knowledge. Our shows that phylogenetic investigations have led unexpected findings. For example, ...

2005
Michael N Dawson

Aim Phylogeography provides a framework to explain and integrate patterns of marine biodiversity at infraand supra-specific levels. As originally expounded, the phylogeographic hypotheses are generalities that have limited discriminatory power; the goal of this study is to generate and test specific instances of the hypotheses, thereby better elucidating both local patterns of evolution and the...

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