Skip to main content
Powered by ShareScore

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.

378

datasets available to search

ShareScore release 0.9.0

Reset

Dataset results

378 results for “widespread species”

Learn how ShareScore rates datasets ↗
dryad40/100

Data from: Genetic and morphological evidence of a geographically widespread hybrid zone between two crocodile species, Crocodylus acutus and Crocodylus moreletii

Open the record for dataset details and reuse information.

publicMay 2016View details →
dryad40/100

Data for: Widespread support for a global species list with a formal governance system

Open the record for dataset details and reuse information.

publicDec 2022View details →
dryad40/100

Data from: Genetic diversity in widespread species is not congruent with species richness in alpine plant communities

Open the record for dataset details and reuse information.

publicMar 2023View details →
edi40/100

Experimentally evaluating effects of postfire drought on establishment, growth and survival of two widespread western conifer species; lodgepole pine and Douglas-fir

This research seeks to understand how drought following wildfires affects the establishment of two widespread Rocky Mountain tree species, lodgepole pine and Douglas-fir. In Yellowstone National Park, warming, drying conditions are leading to increased frequency of severe wildfires that kill existing trees and trigger regeneration of the forest. These trends are expected to continue. Many tree species in Yellowstone are well adapted to fire. Yet, early and abundant seedling establishment after fire is critical for forests to recover. Tree seedlings are particularly sensitive to drought, and evidence suggests that sufficiently dry postfire conditions could cause widespread tree-seedling mortality, with ecological consequences that may last decades. This research will determine how seedlings from two tree species respond to drought conditions expected in the mid-21st century and will identify the physiological mechanisms that drive seedling response to dry conditions. The results of this study will advance understanding of how forests in the western United States will respond to environmental change over coming decades and provide useful information for western land managers who are grappling with increased wildfires.

openCC (other)Jun 2018View details →
edi40/100

Experimentally evaluating effects of postfire drought on establishment, growth and survival of two widespread western conifer species; lodgepole pine and Douglas-fir (greenhouse portion of experiment)

This research seeks to understand how drought following wildfires affects the establishment of two widespread Rocky Mountain tree species, lodgepole pine and Douglas-fir. In Yellowstone National Park, warming, drying conditions are leading to increased frequency of severe wildfires that kill existing trees and trigger regeneration of the forest. These trends are expected to continue. Many tree species in Yellowstone are well adapted to fire. Yet, early and abundant seedling establishment after fire is critical for forests to recover. Tree seedlings are particularly sensitive to drought, and evidence suggests that sufficiently dry postfire conditions could cause widespread tree-seedling mortality, with ecological consequences that may last decades. This research will determine how seedlings from two tree species respond to drought conditions expected in the mid-21st century and will identify the physiological mechanisms that drive seedling response to dry conditions. The results of this study will advance understanding of how forests in the western United States will respond to environmental change over coming decades and provide useful information for western land managers who are grappling with increased wildfires.

openCC (other)Jun 2018View details →
dryad36/100

Data from: Historical demography and climate driven distributional changes in a widespread Neotropical freshwater species with high economic importance

The Neotropical region exhibits the greatest worldwide diversity and the diversification history of several clades is related to the puzzling geomorphologic and climatic history of this region. The freshwater Amazon ecoregion contains the main hydrographic basins of the Neotropical region that are highly dendritic and ecologically diverse. It contains a rich and endemic fish fauna, including one of its most iconic and economically important representatives, the bony-tongue Arapaima gigas (Teleostei, Osteoglossiformes). Here, we evaluated the projected distribution of the genus in different historical periods (Present, Last Glacial Maximum, Last Interglacial Maximum and Near Future) and interpreted these results in light of the genomic diversity and modeled historical demography. For that, we combined species distribution models, population genetic analysis using SNPs and deep learning model selection. We analyzed a representative sample of the genus from the two basins where it naturally occurs, four localities in the Amazon (Am) and three in the Tocantins-Araguaia (To-Ar) basin, as well as individuals from three fish farms. We inferred a potentially smaller distribution in the glacial period, with a possible refuge in central Am. Our genetic data agrees with this result, suggesting a higher level of genetic diversity in the Am basin, compared to that observed in To-Ar. Our deep learning model comparison indicated that the To-Ar basin was colonized by the population from the Am basin. Considering a global warming scenario in the near future, A. gigas could reach an even larger range, especially if anthropogenic related dispersal occurs, potentially invading new areas and impacting their communities.

opencc-zeroJun 2020View details →
dryad36/100

A morphometric assessment of species boundaries in a widespread anole lizard (Squamata: Dactyloidae)

<p>Cryptic species - genetically distinct species that are morphologically difficult to distinguish - present challenges to systematists. Operationally, cryptic species are very difficult to identify and sole usage of genetic data or morphological data can fail to recognize evolutionarily isolated lineages. We use morphometric data to test species boundaries hypothesized with genetic data in the North Caribbean Bark Anole (<i>Anolis distichus</i>), a suspected species complex. We use univariate and multivariate analyses to test if candidate species based on genetic data can be accurately diagnosed. We also test alternate species delimitation scenarios with a model fitting approach that evaluates normal mixture models capable of identifying morphological clusters. Our analyses reject the hypothesis that the candidate species are diagnosable. Neither uni- nor multivariate morphometric data distinguish candidate species. The best supported model included two morphological clusters; however, these clusters were uneven and did not align with a plausible species divergence scenario. After removing two related traits driving this result, only one cluster was supported. Despite substantial differentiation revealed by genetic data, we recover no new evidence to delimit species and refrain from taxonomic revision. This study highlights the importance of considering other types of data along with molecular data when delimiting species.</p>

opencc-zeroJun 2020View details →
dryad36/100

Data from: Isolation by distance and isolation by environment contribute to population differentiation in Protea repens (Proteaceae L.), a widespread South African species

PREMISE OF THE STUDY: The Cape Floristic Region (CFR) of South Africa is renowned for its botanical diversity, but the evolutionary origins of this diversity remain controversial. Both neutral and adaptive processes have been implicated in driving diversification, but population-level studies of plants in the CFR are rare. Here, we investigate the limits to gene flow and potential environmental drivers of selection in Protea repens L. (Proteaceae L.), a widespread CFR species. METHODS: We sampled 19 populations across the range of P. repens and used genotyping by sequencing to identify 2066 polymorphic loci in 663 individuals. We used a Bayesian FST outlier analysis to identify single-nucleotide polymorphisms (SNPs) marking genomic regions that may be under selection; we used those SNPs to identify potential drivers of selection and excluded them from analyses of gene flow and genetic structure. RESULTS: A pattern of isolation by distance suggested limited gene flow between nearby populations. The populations of P. repens fell naturally into two or three groupings, which corresponded to an east-west split. Differences in rainfall seasonality contributed to diversification in highly divergent loci, as do barriers to gene flow that have been identified in other species. CONCLUSIONS: The strong pattern of isolation by distance is in contrast to the findings in the only other widespread species in the CFR that has been similarly studied, while the effects of rainfall seasonality are consistent with well-known patterns. Assessing the generality of these results will require investigations of other CFR species.

opencc-zeroDec 2016View details →
dryad36/100

Data from: Lecanora caperatica (Lecanoraceae, lichenized ascomycetes) a new sorediate species widespread in eastern North America

Lecanora caperatica is described based on collections from throughout temperate eastern North America. It is a crustose sorediate species in the L. subfusca group which has pulcaris-type apothecia, and produces atranorin and caperatic acid often with accessory roccellic/angardianic acid. The species is chemically similar to the European L. mugosphagneti which differs in ecology, thallus morphology and in having albella-type apothecia. The generic placement of L. caperatica, and its affinity to the L. subfusca group, are confirmed by molecular phylogenetic analysis.

opencc-zeroDec 2017View details →
dryad36/100

Data from: Opportunistic data reveal widespread species turnover in Enallagma damselflies at biogeographical scales

An information tradeoff exists between systematic presence/absence surveys and purely opportunistic (presence-only) records for investigating the geography of community structure. Opportunistic species occurrence data may be of relatively limited quality, but typically involves numerous observations and species. Given the quality-quantity tradeoff, what can opportunistic data reveal about spatial patterns in community structure? Here we explore opportunistic data in describing geographic patterns of species composition, using over 4,600 occurrence records of Enallagma damselflies in the United States. We tested phylogenetic scale (genus level, Enallagma major clades, Enallagma subclades) and spatial extent (U.S. vs. watershed regions), hypothesizing that nonrandom structure is more likely at larger spatial extents. We also used three sets of systematic presence/absence surveys as a benchmark for validating opportunistic presence-only records. Null model analysis of matrix coherence and species replacements showed many cases of nonrandom structure and widespread species turnover. This outcome was repeated across spatial and environmental gradients and community composition scenarios. Turnover dominated across the U.S. and two watersheds spanning biogeographic boundaries, but random assemblages were prevalent in a third watershed with limited longitudinal extent. Turnover also pervaded each level of phylogeny. Opportunistic presence-only datasets showed identical patterns as systematic presence/absence datasets. These results indicate that extensive opportunistic data can be used to detect species turnover, especially at geographic scales where range margins are crossed.

opencc-zeroDec 2016View details →
dryad36/100

Data from: Widespread bird species show idiosyncratic responses in residual body mass to selective logging and edge effects in the Colombian Western Andes

<p>This dataset consists of banding data (N = 1589 captures, 129 bird species), including morphological and breeding biology measures, collected from understory birds in subtropical cloudforest at roughly 2000 m.a.s.l. in the municipality of El Cairo in Colombia's Western Andes (Serrania de los Paraguas range). Roughly 8,350 net hours were divided into two three-month field seasons (June-August 2017 and January-March 2018), both corresponding to local dry seasons. Birds were banded along 500-meter transects in forest interior across a gradient of forest fragment patch sizes (N = 8 fragments, area range = 10-173 ha) and a private ~750 ha reserve (Reserva Natural Cerro El Ingles) in the same landscape. Each non-hummingbird capture was fitted with an aluminum leg band with a unique combination, and we collected data on mass, tarsus length, wing chord, pectoral muscle score, cloacal protuberance and brood patch score, and age and sex (where possible due to plumage differences). We captured 101 species (including 6 boreal migrants) in 844 captures (53%) during the January-March sampling period and 102 species in 745 captures during the June-August sampling period; each site was sampled during both sampling periods. The most captured bird families were Trochilidae (24 spp., 36% of total captures), Thraupidae (17 spp.), Tyrannidae (16 spp.), Furnariidae (14 spp.), and Turdidae (6 spp.).</p> <p>A subset of these data (uploaded as a separate file) were used to calculate body condition indices for 20 species of commonly captured birds (N = 984 captures) that occured across much of the patch size gradient (at least 8 out of 14 transects), and were related to fragment area and measures of edge and selective logging effects (see Jones et al. 2022). In this file, we include all predictor variables necessary to run the generalized linear mixed models in Jones et al. (2022), including proportion forest cover within 1 km (a proxy for patch size), edge density, average distance to forest edge from the netting transect, average canopy cover and height along the transect, multivariate measures of understory plant density, large-diameter tree density, and vertical vegetation structure, elevation of each transect, and average yearly rainfall for each transect.</p>

opencc-zeroJul 2022View details →
dryad36/100

Data from: Widespread plant species temporal variation along environmental and microclimate gradients in Norwegian mountains

<p>The effect of climate change on mountain vegetation is influenced by environmental factors and site effects. To monitor the effect of climate change we therefore need to understand species sensitivity to microclimate and environmental gradients. The objective of this study is to study widespread plant species temporal and spatial variation along environmental and microclimate gradients in Norwegian mountains along a coast-inland gradient. Occurrence and abundance of plant species were surveyed in 110 study plots in four mountains at two points in time, seven years apart. Of the 222 plant species registered, <em>Salix herbacea, Phyllodoce caerulea, Carex bigelowii, Juncus trifidus, Vaccinium myrtillus, Avenella flexuosa</em>, and <em>Empetrum nigrum</em> were widespread across all mountains. These species responded differently to environmental and microclimate gradients, and abundance data was more sensitive than occurrence data. During the short time span we observed some indications of response which might support the assumption that boreal species outcompete alpine species in the forest transition zone, but our data does not indicate this effect at higher altitudes. Monitoring of climate change in mountains need to include plots along environmental and microclimate gradients as well as abundance of a set of wide-spread plant species that represent both regional and local environmental and climate gradients. However, when monitoring perennial plant species, the necessity of long-time monitoring projects is high because such species develop slowly over several decades.</p>

opencc-zeroMay 2024View details →
zenodo36/100

concatenated_alignment_4378bases Description of three widespread new Peronospora species parasitising Caryophyllales

<p>concatenated_alignment_4378bases in Description of three widespread new Peronospora species parasitising Caryophyllales</p>

opencc-by-4.0Jul 2030View details →
zenodo36/100

Table 1 in Mitochondrial DNA reveals the impact of Pleistocene glaciations on a widespread palearctic bat species

<p><b>Table 1</b> Average values of detected genetic p-distances (&plusmn;SD) in percentage per lineage of <i>H. savii</i> s.l. according to used marker set</p><table><tbody><tr><th></th><th></th><th>A</th><th>B</th><th>C</th><th>D</th><th>E</th></tr></tbody><tbody><tr><th>A</th><td>ND1:</td><td>0.46&plusmn; 0.12</td><td></td><td></td><td></td><td></td></tr><tr><td>CytB:</td><td>0.32&plusmn; 0.21</td><td></td><td></td><td></td><td></td></tr><tr><td>COI:</td><td>0.28&plusmn; 0.24</td><td></td><td></td><td></td><td></td></tr><tr><td>16 S:</td><td>0.13&plusmn; 0.11</td><td></td><td></td><td></td><td></td></tr><tr><th>B</th><td>ND1:</td><td>9.14&plusmn; 0.28</td><td>0.47&plusmn; 0.57</td><td></td><td></td><td></td></tr><tr><td>CytB:</td><td>8.03&plusmn; 1.31</td><td>1.68&plusmn; 0.96</td><td></td><td></td><td></td></tr><tr><td>COI:</td><td>7.90&plusmn; 0.24</td><td>0.18&plusmn; 0.19</td><td></td><td></td><td></td></tr><tr><td>16 S:</td><td>3.90&plusmn; 0.27</td><td>0.34&plusmn; 0.41</td><td></td><td></td><td></td></tr><tr><th>C</th><td>ND1:</td><td>6.79&plusmn; 0.51</td><td>8.46&plusmn; 0.35</td><td>0.62 &plusmn;0.68</td><td></td><td></td></tr><tr><td>CytB:</td><td>8.27&plusmn; 0.68</td><td>9.01&plusmn; 1.06</td><td>1.44 &plusmn;0.71</td><td></td><td></td></tr><tr><td>COI:</td><td>7.36&plusmn; 0.25</td><td>8.92&plusmn; 0.24</td><td>0.83 &plusmn;0.61</td><td></td><td></td></tr><tr><td>16 S:</td><td>/</td><td>/</td><td>/</td><td></td><td></td></tr><tr><th>D</th><td>ND1:</td><td>9.19&plusmn; 0.30</td><td>9.12&plusmn; 0.24</td><td>8.55 &plusmn;0.64</td><td>0.42&plusmn;0.54</td><td></td></tr><tr><td>CytB:</td><td>/</td><td>/</td><td>/</td><td>/</td><td></td></tr><tr><td>COI:</td><td>8.91&plusmn; 0.18</td><td>7.36&plusmn; 0.28</td><td>10.15 &plusmn;0.38</td><td>0</td><td></td></tr><tr><td>16 S:</td><td>/</td><td>/</td><td>/</td><td>/</td><td></td></tr><tr><th>E</th><td>ND1:</td><td>/</td><td>/</td><td>/</td><td>/</td><td>/</td></tr><tr><td>CytB:</td><td>/</td><td>/</td><td>/</td><td>/</td><td>/</td></tr><tr><td>COI:</td><td>/</td><td>/</td><td>/</td><td>/</td><td>/</td></tr><tr><td>16 S:</td><td>12.8&plusmn; 0.65</td><td>11.81 &plusmn;0.89</td><td>/</td><td>/</td><td>0.59&plusmn; 0.30</td></tr><tr><th>X</th><td>ND1:</td><td>/</td><td>/</td><td>/</td><td>/</td><td>/</td></tr><tr><td>CytB:</td><td>/</td><td>/</td><td>/</td><td>/</td><td>/</td></tr><tr><td>COI:</td><td>/</td><td>/</td><td>/</td><td>/</td><td>/</td></tr><tr><td>16 S:</td><td>4.62&plusmn; 0.23</td><td>5.12&plusmn; 0.29</td><td>/</td><td>/</td><td>9.97&plusmn; 0.31</td></tr></tbody></table>

opencc-by-4.0Sep 2024View details →
zenodo36/100

Table 2 in Mitochondrial DNA reveals the impact of Pleistocene glaciations on a widespread palearctic bat species

<p><b>Table 2</b> Estimated divergence times (in MYa) between mitochondrial lineages, obtained by BI analysis of the different marker datasets. Node heights (mean ages) are given, with 95% HPD intervals in square brackets. FIS indicates the first internal split within what we consider <i>H. savii</i> s.l. (including all four lineages &ndash; A, B, C and D), while SNN denotes the split from its nearest neighbour in the tree (most commonly <i>H. alaschanicus</i>). In the case of 16 S dataset, SNN does not include lineage E, as it is placed significantly more basal (see Fig. 2d). E is also excluded from <i>H. savii</i>, alongside X (Fig. 1c), in case of concatenated dataset. (C1, C2) refers to dating of the split within lineage C. Hstu &ndash; <i>H. stubbei</i>, Hara &ndash; <i>H. arabicus</i>, sc &ndash; sister clade</p><table><tbody><tr><th></th><th>ND1</th><th>CytB</th><th>COI</th><th>16 S</th><th>Conc.</th></tr></tbody><tbody><tr><th>(A, C)</th><td>2.17 [1.62&ndash;2.70]</td><td>2.16 [1.75&ndash;2.60]</td><td>2.58 [1.94&ndash;3.30]</td><td></td><td>3.21 [2.56&ndash;3.89]</td></tr><tr><th>(A, B)</th><td></td><td></td><td></td><td>3.31 [2.13&ndash;4.52]</td><td></td></tr><tr><th>(B, D/Hstu)</th><td>2.38 [1.89&ndash;2.92]</td><td></td><td>2.54 [1.87&ndash;3.24]</td><td></td><td>3.12 [2.46&ndash;3.82]</td></tr><tr><th>(B, (A, C))</th><td></td><td>2.50 [2.08&ndash;2.94]</td><td></td><td></td><td></td></tr><tr><th>(C1,C2)</th><td>0.51 [0.32&ndash;0.70]</td><td>0.54 [0.36&ndash;0.73]</td><td>0.44 [0.24&ndash;0.66]</td><td></td><td>0.64 [0.43&ndash;0.85]</td></tr><tr><th>(E, sc)</th><td></td><td></td><td></td><td>11.18 [8.15&ndash;14.39]</td><td>9.93 [7.79&ndash;12.19]</td></tr><tr><th>(X, (A, B))</th><td></td><td></td><td></td><td>4.31 [2.97&ndash;5.76]</td><td></td></tr><tr><th>(X, Hara)</th><td></td><td></td><td></td><td></td><td>2.47 [0.00-5.44]</td></tr><tr><th>FIS</th><td>2.79 [2.32&ndash;3.28]</td><td></td><td>3.29 [2.67&ndash;3.95]</td><td></td><td>3.89 [3.22&ndash;4.62]</td></tr><tr><th>SNN</th><td>3.12 [2.58&ndash;3.67]</td><td>3.36 [2.81&ndash;3.93]</td><td>3.61 [2.95&ndash;4.34]</td><td>5.96 [4.68&ndash;7.37]</td><td>4.51 [3.72&ndash;5.30]</td></tr></tbody></table>

opencc-by-4.0Sep 2024View details →
zenodo36/100

Figure 1 in Combined phylogenetic analysis of a new North American fossil species confirms widespread Eocene distribution for stem rollers (Aves, Coracii)

Figure 1. Map showing the distribution of extant and extinct Coracii.

opencc-by-4.0Oct 2009View details →
dryad36/100

Data from: Hedging at the rear edge: Intraspecific trait variability drives the trajectory of marginal populations in a widespread boreal tree species

<p>Rear-edge populations at the warm margin of species distribution are small, isolated and face environmental conditions at the limit of species bioclimatic envelope. Intraspecific phenotypic variation contributing to the persistence of peripheral populations is expected to become increasingly important under future climate conditions in order to avoid local extirpation where range shifts lag behind climate change velocity.</p> <p>We investigated the putative role of intraspecific phenotypic variation for the maintenance of rear-edge populations of fire-prone jack pine (<em>Pinus banksiana</em>), an obligate pyriscent boreal species. We assessed whether variation in cone serotiny is associated with the population trajectory of marginal stands located south of the boreal biome, in the temperate forest where natural wildfires are infrequent and unpredictable. To this end, we estimated stand-scale serotiny, minimal age and tree size structure in 26 jack pine stands from the rear edge (n = 17 sites) and the core (n = 9 sites) of the species' range in eastern Canada.</p> <p>On average, rear-edge jack pine populations are less serotinous albeit more variably compared to range-core populations where serotiny is more uniformly high. Rear-edge stands are generally older and display reverse J-shape tree size structure indicative of a multi-aged demographic equilibrium, whereas range-core stands are younger and show a unimodal stand structure depicting a single aging cohort generally lacking interfire recruitment. Eco-evolutionary dynamics shifts from a dependency on wildfires in range-core populations to stands that can regenerate and persist without recurrent fires at the rear edge, where stand-scale serotiny reaches values below 85%.</p> <p>Synthesis: Unlike range-core populations, rear-edge jack pine populations can locally rely on a dual life-history strategy to ensure both steady recruitment during fire-free intervals and successful postfire regeneration. This capacity to cope with infrequent and unpredictable fire regime should increase the resilience and resistance of jack pine populations as global changes alter fire dynamics of the boreal forest. More generally, unique intraspecific phenotypic variation in rear-edge populations contributes to long-term species persistence in marginal environmental conditions that might scale up with global changes. The conservation of rear-edge populations and their genetic legacy appears crucial for the resilience of species.</p>

opencc-zeroNov 2022View details →
dryad36/100

Phylogenomics reveals within species diversification but incongruence with color phenotypes in widespread orchid bees (Hymenoptera: Apidae: Euglossini)

<p>Coloration is an important phenotypic trait for taxonomic studies and has been widely used for identifying insect species and populations. However, coloration can be a poor diagnostic character for insect species that exhibit high polymorphism in this trait, which can lead to over-splitting of taxonomic units. In orchid bees, color variation has been interpreted by different taxonomists as either polymorphism associated with Mullerian mimicry complexes or diagnostic traits for species identification. Despite this uncertainty, integrative approaches that incorporate multiple independent datasets to test the validity of hair coloration as a character that identifies independent evolutionary units have not been used. Here, we use phylogenomic data from Ultraconserved Elements (UCEs) to explore whether color phenotypes in the widespread orchid bee species complexes <em>Eulaema</em> <em>meriana</em> and <em>Eulaema</em> <em>bombiformis</em> (Hymenoptera: Apidae: Euglossini) correspond to independent lineages or polymorphic trait variation within species. We find that lineages within both species are structured according to geography and that color morphs are generally unassociated with evolutionarily independent groups except for populations located in the Atlantic Forest of Brazil. We conclude that there is compelling evidence that <em>E. atleticana </em>and <em>E. niveofasciata</em> are subspecies of <em>E. meriana</em> and <em>E. bombiformis</em>, respectively, and not different species as previously suggested. Therefore, we recognize <em>Eulaema meriana atleticana</em> comb. n. and <em>Eulaema bombiformis niveofasciata</em> comb. n. and discuss their morphological characteristics. We make recommendations on the use of color traits for orchid bee taxonomy and discuss the significance of subspecies as evolutionary units relevant for conservation efforts.</p>

opencc-zeroJan 2023View details →
dryad36/100

Genomic divergence and introgression between cryptic species of a widespread North American songbird

<p>Analysis of genomic variation among related populations can sometimes reveal distinct species that were previously undescribed due to similar morphological appearances, and close examination of such cases can provide much insight regarding speciation. Genomic data can also reveal the role of reticulated evolution in differentiation and speciation. White-breasted nuthatches (<em>Sitta carolinensis</em>) are widely distributed North American songbirds that are currently classified as a single species but have been suspected to represent a case of cryptic speciation. Previous genetic analyses suggested four divergent groups, but it was unclear whether these represented multiple reproductively isolated species. Using extensive genomic sampling of over 350 white-breasted nuthatches from across North America and a new chromosome-level reference genome, we asked if white-breasted nuthatches are comprised of multiple species and whether introgression has occurred between divergent populations. Genomic variation of over 300,000 loci revealed four highly differentiated populations (Pacific, n = 45; Eastern, n = 23; Rocky Mountains North, n = 138; and Rocky Mountains South, n = 150) with geographic ranges that are adjacent. We observed a moderate degree of admixture between Rocky Mountain populations but only a small number of hybrids between the Rockies and the Eastern population. The rarity of hybrids together with high levels of differentiation between populations is supportive of populations having some level of reproductive isolation. Between populations, we show evidence for introgression from a divergent ghost lineage of white-breasted nuthatches into the Rocky Mountains South population, which is otherwise closely related to Rocky Mountains North. We conclude that white-breasted nuthatches are best considered at least 3 species and that ghost lineage introgression has contributed to differentiation between the two Rocky Mountain populations. White-breasted nuthatches provide a dramatic case of morphological similarity despite high genomic differentiation, and the varying levels of reproductive isolation among the four groups provide an example of the speciation continuum. </p>

opencc-zeroDec 2022View details →
dryad36/100

Widespread sympatry in a species-rich clade of marine fishes (Carangoidei)

<p>A universal paradigm describing patterns of speciation across the tree of life has been debated for decades. In marine organisms, patterns of speciation are largely unknown due to the deficiency of species-level phylogenies and information on species' distributions, as well as conflicting relationships between species' dispersal, range size and co-occurrence. Most research on global patterns of marine fish speciation has focused on coral reef or pelagic species. Carangoidei is an ecologically important clade of marine fishes that utilize both coral reef and pelagic environments. We used sequence capture of 1314 ultraconserved elements (UCEs) from 154 taxa to generate a phylogeny of Carangoidei and its parent clade, Carangiformes. Age-range correlation analyses of the geographic distributions and divergence times of sister species pairs reveal widespread sympatry, with 73% of sister species pairs exhibiting a sympatric geographic distribution, regardless of node age, and most species pairs co-existing across large portions of their ranges. We also observe greater disparity in body size and water column depth utilization between sympatric than allopatric sister species. These and other ecological or behavioral attributes likely facilitate sympatry among the most closely related carangoids.</p>

opencc-zeroOct 2023View details →

ScienceDex guides

Understand access before you commit

These curated guides explain access requirements, typical timelines, costs, and reuse considerations for widely used research datasets.

Compare curated 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.

allen-brain-atlas
neuroscienceopenDocumentation, web resources, and API references are available online.
Last verified 2026-04-30Open record

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.

abode-home-cage
behavioral-neuroscienceopenThe DataShare record exposes download links for annotations, documentation, license text, and the zipped per-snippet data directory.
Last verified 2026-04-30Open record

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.

dandi-nwb
electrophysiologyopenPublished Dandiset metadata and archive endpoints are available through the production DANDI API.
Last verified 2026-04-30Open record

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.

ibl
behavioral-neuroscienceopenPublic sessions can be searched and loaded from the IBL public data server through ONE.
Last verified 2026-04-29Open record

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.

openneuro
neuroscienceopenPublished datasets are available on demand over the internet.
Last verified 2026-04-29Open record