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122 results for “temporal diversity”
Data from: Temporal variation in genetic diversity and effective population size of Mediterranean and subalpine Arabidopsis thaliana populations
Currently there exists a limited knowledge on the extent of temporal variation in population genetic parameters of natural populations. Here we study the extent of temporal variation in population genetics by genotyping 151 genome-wide SNP markers polymorphic in 466 individuals collected from nine populations of the annual plant Arabidopsis thaliana during four years. Populations are located along an altitudinal climatic gradient from Mediterranean to subalpine environments in NE Spain, which has been shown to influence key demographic attributes and life-cycle adaptations. Genetically, A. thaliana populations were more variable across space than over time. Common multilocus genotypes were detected several years in the same population, whereas low-frequency multilocus genotypes appeared only one year. High-elevation populations were genetically poorer and more variable over time than low-elevation populations, which might be caused by a higher overall demographic instability at higher altitudes. Estimated effective population sizes were very low but also showed a significant decreasing trend with increasing altitude, suggesting a deeper impact of genetic drift at high-elevation populations. In comparison with single-year samplings, repeated genotyping over time captured substantially higher amount of genetic variation contained in A. thaliana populations. Furthermore, repeated genotyping of populations provided novel information on the genetic properties of A. thaliana populations and allowed hypothesizing on their underlying mechanisms. Therefore, including temporal genotyping programs into traditional population genetic studies can significantly increase our understanding of the dynamics of natural populations.
Data from: The ghost of introduction past: spatial and temporal variability in the genetic diversity of invasive smallmouth bass
Understanding the demographic history of introduced populations is essential for unravelling their invasive potential and adaptability to a novel environment. To this end, levels of genetic diversity within the native and invasive range of a species are often compared. Most studies, however, focus solely on contemporary samples, relying heavily on the premise that the historic population structure within the native range has been maintained over time. Here, we assess this assumption by conducting a three-way comparison of the genetic diversity of native (historic and contemporary) and invasive (contemporary) smallmouth bass (Micropterus dolomieu) populations. Analyses of a total of 572 M. dolomieu samples, representing the contemporary invasive South African range, contemporary and historical native USA range (dating back to the 1930s when these fish were first introduced into South Africa), revealed that the historical native range had higher genetic diversity levels when compared to both contemporary native and invasive ranges. These results suggest that both contemporary populations experienced a recent genetic bottleneck. Furthermore, the invasive range displayed significant population structure, whereas both historical and contemporary native USA populations revealed higher levels of admixture. Comparison of contemporary and historical samples showed both a historic introduction of M. dolomieu, as well as a more recent introduction, thereby demonstrating that undocumented introductions of this species have occurred. Although multiple introductions might have contributed to the high levels of genetic diversity in the invaded range, we discuss alternative factors that may have been responsible for the elevated levels of genetic diversity and highlight the importance of incorporating historic specimens into demographic analyses.
Figure 5 in Diversity and temporal variations of the leafhopper fauna (Cicadellidae, Auchenorrhyncha, Hemiptera) in two ecological zones of Egypt
Figure 5. Seasonal fluctuations of the mean monthly temperature and relative humidity in Qena and Alexandria governorates throughout 2018. SE: standard error.
Figure 4 in Diversity and temporal variations of the leafhopper fauna (Cicadellidae, Auchenorrhyncha, Hemiptera) in two ecological zones of Egypt
Figure 4. Monthly variation in the mean density of leafhoppers per week caught by light trap in Alexandria governorate during 2018. Error bars represent the mean abundance for 4 consecutive weeks per month in three sites (12 counts).
Capturing long-tailed individual tree diversity using an airborne multi-temporal hierarchical model
<p>This dataset contains the hyperspectral images and train-test split from the article. </p> <p> </p> <p>The corresponding comet ML experiment is:</p> <p><a href="https://www.comet.com/bw4sz/deeptreeattention2/209ca047ed004d778c0f0e728e126bda?experiment-tab=chart&showOutliers=true&smoothing=0&transformY=smoothing&viewId=VWzVg9fkZDMidwu9VOZi2weM9&xAxis=epoch">CometML</a></p> <p>To protect ongoing scientific activities in the area, the geospatial position of the crops have been omitted. Please contact ForestGEO for data requests. </p> <p><a href="http://ForestGEO">https://forestgeo.si.edu/</a></p> <p>For the corresponding git repo please see: </p> <p>Contents:</p> <p>train.csv: The image crops used for model training. The image_path corresponds to the relative path to the image file in the directory.</p> <p>test.csv: The image crops used for model evaluation.</p> <p>*.tif images: A 369 band hyperspectral image using the NEON surface reflectance data cropped by the tree crown.</p> <p>The original HSI data: https://data.neonscience.org/data-products/DP3.30006.001. The location of the crown was predicted using the RGB data product and the deepforest model: https://deepforest.readthedocs.io/. </p> <p>The taxonID abbreviations follow NEON's taxonomy: https://data.neonscience.org/taxonomic-lists</p> <p>OSBS.shp: Shapefile with ensemble predictions for the full Ordway Swisher Biological Station. The ensemblaTa column is the predicted taxonID for each crown. The ens_score is the confidence prediction for that crown. The CHM_height is the extracted raster value from NEON's ecosystem structure canopy height model.</p>
Discordant spatio-temporal dynamics of functional and phylogenetic diversity of rotiferan communities exposed to aquaculture effluent
<p>The growth of the human population brought about the global intensification of aquacultural production, and aquaculture became the fastest growing animal husbandry sector. Effluent from aquaculture is an anthropogenic environmental burden, containing organic matter, nutrients, and suspended solids that affect water quality, especially in water bodies of high biodiversity and conservation value. Water quality assessment often relies on bioindicators, analysing changes in taxonomic diversity of various freshwater organismal groups. Stepping beyond taxon diversity, we used functional and phylogenetic diversities of rotifers to identify factors affecting their community organization in response to an aquaculture effluent gradient in the largest oxbow lake in the Carpathian Basin, Hungary. Sampling was carried out three times per season at five points along a 3.5 km section of the oxbow lake, including the point of effluent inflow. We used eight traits to evaluate functional diversity: body size, trophi type, feeding mode, protection type, body wall type, corona type, habitat preference, and tolerance level. Functional and phylogenetic distances among the 24 species identified indicated trait conservatism. Rotiferan diversity increased with increasing distance from the point of influx in spring and summer. Among the factors affecting community organization in spring and summer, we find examples of environmental filtering, while in autumn the role of biotic interaction is more frequent. Under nutrient-rich conditions in spring and summer, organisms belonging to the same functional group were dominant, while under oligotrophic conditions more diverse but less abundant groups were present. Considering functional and phylogenetic traits allowed us to identify organising forces of rotifer communities in the largest oxbow lake of the Hungarian Lowland.</p>
Data from: Diversity and spacio-temporal distribution of mushrooms in a Nigerian savanna: implication for their conservation
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Data from: Genotypic diversity and spatial-temporal distribution of Symbiodinium clones in an abundant reef coral
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Data from: Predicting the effects of increasing temporal scale on species composition, diversity, and rank-abundance distributions
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Data from: Temporal and spatial comparisons of angiosperm diversity between eastern Asia and North America
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Data from: Dendritic network structure and dispersal affect temporal dynamics of diversity and species persistence
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Data from: Direct evidence that density-dependent regulation underpins the temporal stability of abundant species in a diverse animal community
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Data from: Temporal drop of genetic diversity in Bombus pauloensis
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Data from: How do leaf trait values change spatially and temporally with light availability in a grassland diversity experiment?
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Data from: Drivers of temporal beta diversity of a benthic community in a seasonally hypoxic ocean fjord
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Data from: The ghost of introduction past: spatial and temporal variability in the genetic diversity of invasive smallmouth bass
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Data from: Linking genetic diversity and temporal fluctuations in population abundance of the introduced feral cat (Felis silvestris catus) on the Kerguelen Archipelago.
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Data from: Temporal genetic patterns of diversity and structure evidence sweepstakes in reproductive success of a spiny lobster
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Environment regimes play an important role in structuring trait- and taxonomy-based temporal beta diversity of riverine diatoms
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Data from: Spatial and temporal drivers of phenotypic diversity in polymorphic snakes
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ScienceDex guides
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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.