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95 results for “rapid divergence”
Data from: Recent rapid speciation and ecomorph divergence in Indo-Australian sea snakes
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Data from: Genome-wide SNP data reveal cryptic phylogeographic structure and microallopatric divergence in a rapids-adapted clade of cichlids from the Congo River
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Data from: Correlation between sequence divergence and polymorphism reveals similar evolutionary mechanisms acting across multiple timescales in a rapidly evolving plastid genome
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Data from: Rapid genetic and morphologic divergence between captive and wild populations of the endangered Leon Springs pupfish, Cyprinodon bovinus
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Data from: Rapid divergence of genome architectures following the origin of an ectomycorrhizal symbiosis in the genus Amanita
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Artificial selection on female preferences rapidly alters choosiness and acceptance of divergent male songs in Drosophila
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Data from: The Gambian epauletted fruit bat shows increased genetic divergence in the Ethiopian highlands and in an area of rapid urbanisation
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Data from: Genomics of rapid ecological divergence and parallel adaptation in four tidal marsh sparrows
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Data from: Rapid divergence of nesting depth and digging appendages among tunneling dung beetle populations and species
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Data from: Rapid morphological divergence of a stream fish in response to changes in water flow
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Data from: Population genomic signatures of divergent adaptation, gene flow, and hybrid speciation in the rapid radiation of Lake Victoria cichlid fishes
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Data from: Niche divergence promotes rapid diversification of East African sky island white-eyes (Aves: Zosteropidae)
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Glacial cycles drive rapid divergence of cryptic field vole species
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Clines on the seashore: The genomic architecture underlying rapid divergence in the face of gene flow
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Evolutionary divergences mirror Pleistocene paleodrainages in a rapidly-evolving complex of oasis-dwelling jumping spiders (Salticidae, Habronattus tarsalis)
<p>We aimed to understand the diversification history of jumping spiders in the <i>Habronattus tarsalis</i> species complex, with particular emphasis on how history in this system might illuminate biogeographic patterns and processes in deserts of the western United States. Desert populations of <i>H. tarsalis</i> are now confined to highly discontinuous oasis-like habitats, but these habitats would have been periodically more connected during multiple pluvial periods of the Pleistocene. We estimated divergence times using relaxed molecular clock analyses of published transcriptome datasets. Geographic patterns of diversification history were assessed using phylogenetic and cluster analyses of original sequence capture, RADSeq and morphological data. Clock analyses of multiple replicate transcriptome datasets indicate mid- to late-Pleistocene divergence dates within the <i>H. tarsalis</i> group complex. Coalescent and concatenated phylogenetic analyses <span><span>indicate</span></span><span> </span>four early-diverging lineages (<i>H. mustaciata</i>, <i>H. ophrys</i>, and <i>H. tarsalis</i> from the Lahontan and Owens drainage basins), with remaining samples separated into larger clades from the Mojave desert, and western populations from the California Floristic Province of California and northern Baja California. Focusing on desert populations, there is a strong correspondence between RAD lineages and modern and/or paleodrainages, mirrored more finely in STRUCTURE and machine learning results. Non-metric multidimensional scaling analysis reveals a strong congruence between morphological clusters and genetic lineages, whether the latter represent previously described species or <i>H.tarsalis </i>RAD lineages. Here we have uncovered a system that adds to our regional biogeographic knowledge in unique ways, using multiple types of evidence in a broadly-distributed terrestrial taxon. At the same time, we have discovered rapid evolution of both novel morphological forms and diverging genetic lineages. The hierarchical nature of variation in the <i>H. tarsalis</i> complex, the minute range sizes of many forms, the high likelihood that geographic distributions have shrunk and expanded through time, and signs of introgression all align with an ephemeral speciation model.</p>
Data from: Adaptive divergence in wine yeasts and their wild relatives suggests a prominent role for introgressions and rapid evolution at non coding sites
In Saccharomyces cerevisiae, the main yeast in wine fermentation, the opportunity to examine divergence at the molecular level between a domesticated lineage and its wild counterpart arose recently due to the identification of the closest relatives of wine strains, a wild population associated with Mediterranean oaks. Since genomic data is available for a considerable number of representatives belonging to both groups, we used population genomics to estimate the degree and distribution of nucleotide variation between wine yeasts and their closest wild relatives. We found widespread genome-wide divergence, particularly at non-coding sites, which, together with above average divergence in trans-acting DNA binding proteins, may suggest an important role for divergence at the level of transcriptional regulation. Nine outlier regions putatively under strong divergent selection were highlighted by a genome wide scan under stringent conditions. Several cases of introgressions originating in the sibling species S. paradoxus, were also identified in the Mediterranean oak population. FFZ1 and SSU1, mostly known for conferring sulphite resistance in wine yeasts, were among the introgressed genes, although not fixed. Because the introgressions detected in our study are not found in wine strains, we hypothesise that ongoing divergent ecological selection segregates the two forms between the different niches. Together, our results provide a first insight into the extent and kind of divergence between wine yeasts and their closest wild relatives.
Data from: Hybrid 'superswarm' leads to rapid divergence and establishment of populations during a biological invasion
Understanding the genetic background of invading species can be crucial information clarifying why they become invasive. Intraspecific genetic admixture among lineages separated in the native ranges may promote the rate and extent of an invasion by substantially increasing standing genetic variation. Here, we examined the genetic relationships among threespine stickleback that recently colonized Switzerland. This invasion results from several distinct genetic lineages that colonized multiple locations and have since undergone range expansions, where they coexist and admix in parts of their range. Using 17 microsatellites genotyped for 634 individuals collected from 17 Swiss and two non-Swiss European sites, we reconstruct the invasion of stickleback and investigate the potential and extent of admixture and hybridization among the colonizing lineages from a population genetic perspective. Specifically, we test for an increase in standing genetic variation in populations where multiple lineages coexist. We find strong evidence of massive hybridization early on, followed by what appears to be recent increased genetic isolation and the formation of several new genetically distinguishable populations, consistent with a hybrid 'superswarm'. This massive hybridization and population formation event(s) occurred over approximately 140 years and likely fuelled the successful invasion of a diverse range of habitats. The implications are that multiple colonizations coupled with hybridization can lead to the formation of new stable genetic populations potentially kick-starting speciation and adaptive radiation over a very short timescale.
Data from: The legacy of Eastern Mediterranean mountain uplifts – rapid disparity of phylogenetic niche conservatism and divergence in mountain vipers
<p><b>Aim</b> The orogeny of the eastern Mediterranean region has substantially affected ecological speciation patterns, particularly of mountain-dwelling species. Mountain vipers of the genus <i>Montivipera</i> are among the paramount examples of Mediterranean neo-endemism, with restricted ranges in the mountains of Anatolia, the Levant, Caucasus, Alborz, and Zagros. Here we explore the phylogenetic and ecological diversification of <i>Montivipera</i> to reconstruct its ecological niche evolution and biogeographic history.</p> <p><b>Location</b> Eastern Mediterranean mountain ecosystems</p> <p><b>Methods</b> Using 177 sequences of three mitochondrial genes, a dated molecular phylogeny of mountain vipers was reconstructed. Based on 320 occurrence points within the entire range of the genus and six climatic variables, ecological niches were modelled and used to infer ancestral niche occupancy. In addition, the biogeographic history and ancestral states of the species were reconstructed across climate gradients.</p> <p><b>Results</b> Dated phylogenetic reconstruction revealed that the ancestor of mountain vipers split into two major clades at around 12.18 Mya followed by multiple vicariance events due to rapid orogeny. <i>Montivipera</i> colonised coastal regions from a mountain-dwelling ancestor. We detected a highly complex ecological niche evolution of mountain vipers to temperature seasonality measured by means of a strong phylogenetic signal.</p> <p><b>Conclusion </b>Raising mountain belts in the Eastern Mediterranean region and subsequent remarkable changes in temperature seasonality have led to the formation of important centres of diversification and endemism in this biodiversity hotspot. High rates of niche conservatism, low genetic diversity, and segregation of ranges into the endemic distribution negatively influenced the adaptive capacity of mountain vipers. We suggest that these species should be considered as evolutionary significant units and priority species for conservation in Mediterranean mountain ecosystems.</p>
Data from: Rapid divergence of predator functional traits affects prey composition in aquatic communities
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Data from: The legacy of Eastern Mediterranean mountain uplifts – rapid disparity of phylogenetic niche conservatism and divergence in mountain vipers
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Allen Brain Atlas
Allen Brain Atlas is an Allen Institute collection of brain map atlases, datasets, APIs, and analysis tools covering mouse, human, and non-human primate brain resources.
Annotated Behaviour and Observability Dataset (ABODe)
ABODe is a University of Edinburgh DataShare dataset for behavior classification in group-housed mice using home-cage video, identities, bounding boxes, ground-plate positions, and annotator labels.
DANDI Archive for NWB datasets
DANDI is a BRAIN Initiative archive for publishing and sharing neurophysiology data, including electrophysiology, optophysiology, and behavioral data packaged as NWB and related standards.
International Brain Laboratory public data
The International Brain Laboratory public data releases expose standardized mouse decision-making experiments, including Neuropixels recordings, widefield calcium imaging, behavior, and session metadata accessed through the ONE API.
OpenNeuro
OpenNeuro is a free, open platform for sharing neuroimaging datasets, with public search, dataset pages, and download paths for web, S3, DataLad, and the OpenNeuro CLI.