Find research datasets worth reusing
Search datasets from major research repositories and use ShareScore to quickly assess how well each record supports discovery, access, and reuse.
89
datasets available to search
ShareScore release 0.9.0
Dataset results
89 results for “parapatric”
Patterns of Speciation in a Parapatric Pair of Saturnia Moths as Revealed by Target Capture
<p>This is the dataset for the manuscript entitled Patterns of Speciation in a Parapatric Pair of Saturnia Moths as Revealed by Target Capture. This study helps in the delimitation of a parapatric pair of two species of moths in a complex distribution considering their evolutionary history with the help of the Target Capture method.</p>
Data from: Fuzzy boundaries: Color and gene flow patterns among parapatric lineages of the Western shovel-nosed snake and taxonomic implication
Open the record for dataset details and reuse information.
Data from: Variation in ecophysiological traits might contribute to ecogeographic isolation and divergence between parapatric ecotypes of Mimulus aurantiacus
Many forms of reproductive isolation contribute to speciation, and early acting barriers may be especially important, because they have the first opportunity to limit gene flow. Ecogeographic isolation occurs when intrinsic traits of taxa contribute to disjunct geographic distributions, reducing the frequency of inter‐taxon mating. Characterizing this form of isolation requires knowledge of both the geographic arrangement of suitable habitats in nature and the identification of phenotypes involved in shaping geographic distributions. In Mimulus aurantiacus, red‐ and yellow‐flowered ecotypes are incompletely isolated by divergent selection exerted by different pollinators. However, these emerging taxa are largely isolated spatially, with a hybrid zone occurring along a narrow region of contact. In order to assess whether responses to abiotic conditions contribute to the parapatric distribution of ecotypes, we measured a series of ecophysiological traits from populations along a transect, including drought sensitivity, leaf area, and the concentrations of vegetative flavonoids. In contrast to the abrupt transitions in floral phenotypes, we found that ecophysiological traits exhibited a continuous geographic transition that largely mirrors variation in climatological variables. These traits may impede gene flow across a continuous environmental gradient, but they would be unlikely to result in ecotypic divergence alone. Nevertheless, we found a genetic correlation between vegetative and floral traits, providing a potential link between the two forms of isolation. Although neither barrier appears sufficient to cause divergence on its own, the combined impacts of local adaptation to abiotic conditions and regional adaptation to pollinators may interact to drive discontinuous variation in the face of gene flow in this system.
Data from: Multiple lines of evidence indicate ongoing allopatric and parapatric diversification in an Afromontane sunbird (Cinnyris reichenowi)
<p>Africa's montane ecosystems are noteworthy not only for their isolation, but for their morphologically similar bird populations that inhabit geographically disparate localities. Many species possess range disjunctions in excess of 2,000 km and appear to represent populations that have been isolated since at least the last Ice Age, including the Northern Double-collared Sunbird (<em>Cinnyris reichenowi</em>). Recent work on other Afromontane birds has demonstrated substantial phylogeographic structure can exist in phenotypically similar populations, with cryptic species occurring parapatrically within the same mountain range. We explored genetic, morphological, and ecological diversity within <em>C. reichenowi</em> to assess whether cryptic regional diversification occurs across the disjunct portions of this species' range. Within <em>C. reichenowi</em>, we find consistent patterns of morphological disparity that coincide with genetic diversification between xeric and wet montane populations within the Cameroon Line in the Western population, and clear genetic differentiation between Western and Eastern populations. Our research demonstrates that the geographically isolated populations of <em>Cinnyris reichenowi</em> represent different species, and that ecological diversification is shaping populations within Central Africa. We show here that two named populations should be recognized as members of a western species in the Northern Double-collared Sunbird complex: nominate <em>Cinnyris preussi preussi</em> in the Cameroon Line montane forests, and <em>C. p. genderuensis</em> in the more xeric hinterland of Cameroon and the Central African Republic, likely occurring in adjacent Nigeria as well.</p>
Data from: A low-latitude species pump: Peripheral isolation, parapatric speciation and mating-system evolution converge in a marine radiation
<p><span>Geologically recent radiation can shed light on speciation processes, but incomplete lineage sorting and introgressive gene flow render accurate evolutionary reconstruction and interpretation challenging. Independently evolving metapopulations of low-dispersal taxa may provide an additional level of phylogeographic information, given sufficiently broad sampling and genome-wide sequencing. Evolution in the marine brown algal genus </span><span>Fucus</span><span> in the south-eastern Atlantic was shaped by Quaternary climate-driven range shifts. Over this timescale, divergence and speciation occurred against a background of expansion-contraction cycles from multiple refugia, together with mating-system shifts from outcrossing (dioecy) to selfing hermaphroditism. We tested the hypothesis that peripheral isolation of range edge (dioecious) </span><span>F. vesiculosus</span><span> led to parapatric speciation and radiation of hermaphrodite lineages. Species tree methods using 876 single-copy nuclear genes and extensive geographic coverage produced conflicting topologies with respect to geographic clades of </span><span>F. vesiculosus</span><span>. All methods, however, revealed a new and early diverging hermaphrodite species, </span><span>Fucus macroguiryi</span><span> sp. Nov. Both the multispecies coalescent and polymorphism-aware models (in contrast to concatenation) support sequential paraphyly in </span><span>F. vesiculosus</span><span> resulting from distinct evolutionary processes. Our results support 1) peripheral isolation of the southern </span><span>F. vesiculosus</span><span> clade prior to parapatric speciation and radiation of hermaphrodite lineages – a "low latitude species pump". 2) Directional introgressive gene flow into </span><span>F. vesiculosus</span><span> around the present-day secondary contact zone (sympatric-allopatric boundary) between dioecious/hermaphrodite lineages as hermaphrodites expanded northwards, as supported by concordance analysis and statistical tests of introgression. Species boundaries in the extensive sympatric range are likely maintained by reproductive system (selfing in hermaphrodites) and reinforcement.</span></p>
Adding the third dimension to studies of parallel evolution of morphology and function: an exploration based on parapatric lake-stream stickleback
Recent methodological advances have led to a rapid expansion of evolutionary studies employing three-dimensional landmark-based geometric morphometrics (GM). GM methods generally enable researchers to capture and compare complex shape phenotypes, and to quantify their relationship to environmental gradients. However, some recent studies have shown that the common, inexpensive, and relatively rapid two-dimensional GM methods can distort important information and produce misleading results because they cannot capture variation in the depth (Z) dimension. We use micro-CT scanned threespine stickleback (Gasterosteus aculeatus Linnaeus, 1758) from six parapatric lake-stream populations on Vancouver Island, British Columbia, to test whether the loss of the depth dimension in 2D GM studies results in misleading interpretations of parallel evolution. Using joint locations described with 2D or 3D landmarks, we compare results from separate 2D and 3D shape spaces, from a combined 2D-3D shape space, and from estimates of biomechanical function. We show that, although shape is distorted enough in 2D projections to strongly influence the interpretation of morphological parallelism, estimates of biomechanical function are relatively robust to the loss of the Z dimension.
Tension zone trapped by exogenous cline: analysis of a narrow hybrid zone between two parapatric Oxytropis species (Fabaceae)
<p>Hybrid zones have been widely highlighted for their interest in understanding evolutionary processes. It is generally accepted that hybrid zones can be maintained in a balance between dispersal and selection. However, the selective forces can either be endogenous (i.e., genetic incompatibilities between parental taxa) or exogenous (i.e., parental taxa are adapted to different environments).</p> <p>In this study, we evaluated these alternatives and determined the maintenance of a narrow hybrid zone between parapatric distributed <em>Oxytropis diversifolia</em> and <em>O. leptophylla</em> in Nei Mongol, China. For 507 individuals sampled from two populations in the hybrid zone, 12 <em>O. diversifolia</em> populations and five <em>O. leptophylla</em> populations, we measured leaf-morphological characteristics, quantified genetic structure using 11 nuclear microsatellite loci and five chloroplast DNA intergenic regions, collected micro- and macrohabitat data, and conducted geographical cline analysis.</p> <p>We found that the two species differed in leaf morphology, and putative hybrids showed either intermediacy or a bias to <em>O. diversifolia</em>. Parental taxa formed two genetically distinct clusters, while populations in the hybrid zone consisted of both parental forms and various admixed individuals, exhibiting a bimodal pattern. The hybrid zone was coupled to ecological transitions of both microhabitat (i.e., the slope) and macroclimatic conditions. However, the genetic clines were significantly narrower than the environmental cline.</p> <p>Our results indicate that endogenous selection can be primarily responsible for maintaining the hybrid zone, while local adaptation accounts for the position of the zone. We further suggest the probable outcome of hybridization could be introgression.</p>
Population genomic analyses support sympatric origins of parapatric morphs in a salamander
<p><span>In numerous clades, divergent sister species have largely non-overlapping geographic ranges. This pattern presumably arises because species diverged in allopatry or parapatry, prior to subsequent contact. Here we provide population-genomic evidence for the opposite scenario: previously sympatric ecotypes that have spatially separated into divergent monomorphic populations over large geographic scales (reverse sympatric scenario). We analyzed a North American salamander (</span><span><em>Plethodon</em> <em>cinereus</em></span><span>) with two color morphs that are broadly sympatric: striped (redback) and unstriped (leadback). Sympatric morphs can show considerable divergence in other traits, and many <em>Plethodon</em> species are fixed for a single morph. Long Island (New York) is unusual in having many pure redback and leadback populations that are spatially separated, with pure redback populations in the west and pure leadbacks in the east. Previous work showed that these pure-morph populations were genetically, morphologically, and ecologically divergent. Here, we performed a coalescent-based analysis of new data from 88,696 single-nucleotide polymorphisms to address the origins of these populations. This analysis strongly supports the monophyly of Long Island populations and their subsequent divergence into pure redback and pure leadback </span><span>populations</span><span>. Taken together, these results suggest that the formerly sympatric mainland morphs separated into parapatric populations on Long Island, reversing the conventional speciation scenario.</span></p>
Population genomic analyses reveal hybridization and marked differences in genetic structure and demographic history of Scurria limpet sister species with parapatric distributions across the southeastern pacific
<p>The study of sister species that occur in parapatry around biogeographic transition zones can help understand the evolutionary processes that underlie the changes in species composition across biogeographic transition zones. The South Eastern Pacific (SEP) coast is a highly productive coastal system that exhibits a broad biogeographic transition zone around 30–35ºS. Here, we present a comparative genome-wide analysis of the sister species <em>Scurria viridula</em> and <em>Scurria zebrina</em>, that occur in parapatry and whose poleward and equatorward range edges intersect in the 30–35ºS SEP biogeographic transition zone. We sampled 118 specimens sourced from nine sites from Tocopilla (22ºS) to Chiloé (41ºS) including one site where both species overlap and analyzed over 8,000 biallelic single nucleotide polymorphisms. We found evidence of hybridization between these species in the contact zone and found significant but contrasting population structures for both species. Our results indicate that the genetic structure in <em>S. viridula</em>, which is currently expanding its range poleward, follows a simple isolation-by-distance model with no traces of natural selection (no evidence of outlier loci). In contrast, <em>S. zebrina</em>, which finds its equatorward range edge at the transition zone, displayed a pronounced genetic break approximately at 32-34ºS, along a region of marked environmental heterogeneity in association with a semi-permanent coastal upwelling regime. For <em>S. zebrina</em>, we also found 43 outlier loci associated with this genetic break, with a significant proportion of them clustering in a single linkage group. This marked difference in the presence of outlier loci between species suggests that they could be responding differently to local environmental challenges found at their overlapping geographic range edges, thus providing important new insights about genomic changes around biogeographic transition zones in sister species and the forces that shape genetic diversity in intertidal marine species. </p>
Tension zone trapped by exogenous cline: analysis of a narrow hybrid zone between two parapatric Oxytropis species (Fabaceae)
Open the record for dataset details and reuse information.
Data from: Multiple lines of evidence indicate ongoing allopatric and parapatric diversification in an Afromontane sunbird (Cinnyris reichenowi)
Open the record for dataset details and reuse information.
Data from: Variation in ecophysiological traits might contribute to ecogeographic isolation and divergence between parapatric ecotypes of Mimulus aurantiacus
Open the record for dataset details and reuse information.
Data from: A low-latitude species pump: Peripheral isolation, parapatric speciation and mating-system evolution converge in a marine radiation
Open the record for dataset details and reuse information.
Population genomic analyses support sympatric origins of parapatric morphs in a salamander
Open the record for dataset details and reuse information.
Data from: Interspecific aggression among parapatric and sympatric songbirds on a tropical elevational gradient
Open the record for dataset details and reuse information.
Population genomic analyses reveal hybridization and marked differences in genetic structure and demographic history of Scurria limpet sister species with parapatric distributions across the southeastern pacific
Open the record for dataset details and reuse information.
Adding the third dimension to studies of parallel evolution of morphology and function: an exploration based on parapatric lake-stream stickleback
Open the record for dataset details and reuse information.
Data from: Partitioning the effects of isolation by distance, environment, and physical barriers on genomic divergence between parapatric threespine stickleback
Open the record for dataset details and reuse information.
FIGURE 12 in Four new Burmese species of Hemiphyllodactylus Bleeker (Squamata: Gekkonidae) from distantly related parapatric clades from the Shan Plateau and Salween Basin
FIGURE 12. Natural and man-made microhabitat habitat of Hemiphyllodactylus pinlaungensis sp. nov. A. Pinlaung City, Shan State, Myanmar. B. Wingabar Cave, Shan State, Myanmar.
FIGURE 9 in Four new Burmese species of Hemiphyllodactylus Bleeker (Squamata: Gekkonidae) from distantly related parapatric clades from the Shan Plateau and Salween Basin
FIGURE 9. Type series of adult female holotype (LSUHC 14032) adult female paratypes (LSUHC 14030–31, 14033–34) of Hemiphyllodactylus kyaiktiyoensis sp. nov. from Kyaiktiyo Mounatain, Mon State, Myanmar. Adult female holotype (LSUHC 14184) of H. zwegabinensis sp. nov., from Zwegabin Mountain, Kayin State, Myanmar.
ScienceDex guides
Understand access before you commit
These curated guides explain access requirements, typical timelines, costs, and reuse considerations for widely used research datasets.
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.