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.
21
datasets available to search
ShareScore release 0.9.0
Dataset results
21 results for “competitive dominance”
Data from: Dominance and competition drive assemblage configuration in an Iberian steppe bird community
<p>Open scripts and data bases for Proceedings of the Royal Society B: Biological Sciences ( Barrero et al., Dominance and competition drive assemblage configuration in an Iberian steppe bird community).</p> <p>Four documents are provided: The two R Scripts needed to create and fix the models and two .xls files with the data described below.</p> <p>Scripts: a) HMSC_2022_FullModel_Run_GitHub.Rmd: script to run the full model. b) HMSC_2022_NullModel_Run_GitHub.Rmd: script to run the null model.</p> <p>Xlsx: a) Grid.xlsx: Coordinates of the species surveyed. b) Data2.xlsx: Habitat descriptor variables</p>
Dominant deer mice show the importance of abundance in competition
Open the record for dataset details and reuse information.
Data from: Brandt’s vole (Lasiopodomys brandtii) affects the dominant position of three gramineous species by altering defense traits and interspecific competition
Open the record for dataset details and reuse information.
Dominance rank, facial morphology, and testes size in male white-faced capuchins: evidence for pre- and post-mating competition
Open the record for dataset details and reuse information.
Data from: Competition and soil-microbe mediated interactions following dieback of a dominant wetland plant
Open the record for dataset details and reuse information.
Data from: Disruption of foraging by a dominant invasive species to decrease its competitive ability
Invasive species are a major threat to biodiversity when dominant within their newly established habitat. The globally distributed Argentine ant Linepithema humile has been reported to break the trade-off between interference and exploitative competition, achieve high population densities, and overpower nests of many endemic ant species. We have used the sensitivity of the Argentine ant to the synthetic trail pheromone (Z)-9-hexadecanal to investigate species interactions for the first time. We predicted that disrupting Argentine ant trail following behaviour would reduce their competitive ability and create an opportunity for three other resident species to increase their foraging success. Argentine ant success in the control was reduced with increasing pheromone concentration, as predicted, but interactions varied among competing resident species. These behavioural variations provide an explanation for observed differences in foraging success of the competing resident species and how much each of these individual competitors can increase their foraging if the competitive ability of the dominant invader is decreased. The mechanism for the observed increase in resource acquisition of resident species appears to be a decrease in aggressive behaviour displayed by the Argentine ant, which may create an opportunity for other resident species to forage more successfully. Our demonstration of species interactions with trail pheromone disruption is the first known case of reduced dominance under a pheromone treatment in ants.
Data from: Polygyny does not explain the superior competitive ability of dominant ant associates in the African ant-plant, Acacia (Vachellia) drepanolobium
1. The Acacia drepanolobium (also known as Vachellia drepanolobium) ant-plant symbiosis is considered a classic case of species coexistence, in which four species of tree-defending ants compete for nesting space in a single host tree species. Coexistence in this system has been explained by trade-offs in the ability of the ant associates to compete with each other for occupied trees versus the ability to colonize unoccupied trees. 2. We seek to understand the proximal reasons for how and why the ant species vary in competitive or colonizing abilities, which are largely unknown. 3. In this study, we use RADseq derived SNPs to identify relatedness of workers in colonies to test the hypothesis that competitively dominant ants reach large colony sizes due to polygyny, i.e., the presence of multiple egg-laying queens in a single colony. 4. We find that variation in polygyny is not associated with competitive ability; in fact, the most dominant species, unexpectedly, showed little evidence of polygyny. We also use these markers to investigate variation in mating behavior among the ant species, and find that different species vary in the number of males fathering the offspring of each queen. Finally, we show that the nature of polygyny varies between the two commonly polygynous species, Crematogaster mimosae and Tetraponera penzigi: in C. mimosae, queens in the same colony are often related, while this is not the case for T. penzigi. 5. These results shed light on factors influencing the evolution of species coexistence in an ant-plant mutualism, as well as demonstrating the effectiveness of RADseq-derived SNPs for parentage analysis.
Data from: The effect of competition on responses to drought and interannual climate variability of a dominant conifer tree of western North America
To accurately predict how ecosystems will respond to climate change – and how management actions can influence such responses – scientists and managers need a better understanding of how and when biotic interactions modify climate–growth relationships. However, current research has largely ignored the role of competition in modulating climate–growth relationships of mature trees. In this study, we assessed the effect of competition on tree responses to drought and interannual climate variability as well as linkages between climate sensitivity and morphological characteristics of the stem wood. We sampled 10 sites in north-eastern Washington, USA, and used dendroecology to quantify responses of Douglas-fir (Pseudotsuga menziesii) to drought and climate variability. Tree-ring series were converted to basal area increment series, and the effects of competition on climate–growth relationships were assessed at the tree and site levels using a combination of correlation analyses and linear mixed-effects models. Competition did not affect tree responses to extreme drought. When soil moisture was below average, tree growth was tightly coupled to climate variability for all trees, regardless of their competitive status. However, in wet years, competition had a pronounced, positive effect on climate sensitivity of growth. Trees with more competition from neighbours exhibited a significantly higher proportion of sapwood area in latewood (a morphological trait associated with greater drought resistance). Synthesis. Our results suggest that a tree's ability to cope with environmental variability is driven not just by the proximate effects of neighbours on resource availability, but also by phenotypic plasticity and long-term adaptations to competitive stress (such as changes in carbon allocation). Findings have important implications for individual-tree and stand-level growth models and may help managers better understand how their activities will modify tree responses to climate change.
Competitive effects of a dominant palm on sapling performance in a Neotropical rainforest
<p>Eradication of herbivores, due to human disturbances, produces a demographic outburst of highly competitive prey species, which in turn reduces plant species diversity. This happens at Los Tuxtlas tropical rainforest, Mexico, where a population outburst of the understory palm <em>Astrocaryum mexicanum</em> is ostensibly excluding tree species, but how this is occurring is still unknown. We used a neighborhood approach to explore the effects of palm shading and palm crowding on the survival and growth (RGR) of saplings of six common tree species. Sixteen to 32 saplings (1.5-2.5 m height) per species were used as focal individuals of circular neighborhoods (4 m radius), which included palms ≥ 1cm stem length potentially competing for light or soil resources. Shading was estimated using hemispherical photographs. Overall, survivorship was high combining all species (93.8%/yr). In most species shading produced a displacement of the crown, which increased with specific leaf area of species. In three species shading had a negative effect on RGR without any effect of crowding, the contrary occurred in two species, and in one species no effects were found. No effects due to trees (DBH ≥ 1cm) crowding were detected. The shading effect increased with species leaf dry matter content (LDMC), while the effect of crowding declined with LDMC and increased with sapling total leaf area. We argue that the species-dependent palm shading/crowding effects were related to the shade tolerance of sapling species. In the long-term such species-specific responses could have consequences for forest structure and composition, as saplings develop to mature stages.</p>
Data from: The effect of competition on responses to drought and interannual climate variability of a dominant conifer tree of western North America
Open the record for dataset details and reuse information.
Data from: Suppressing competitive dominants and community restoration with native parasitic plants using the hemiparasitic Rhinanthus alectorolophus and the dominant grass Calamagrostis epigejos
Open the record for dataset details and reuse information.
Data from: Polygyny does not explain the superior competitive ability of dominant ant associates in the African ant-plant, Acacia (Vachellia) drepanolobium
Open the record for dataset details and reuse information.
Data from: Disruption of foraging by a dominant invasive species to decrease its competitive ability
Open the record for dataset details and reuse information.
Competitive effects of a dominant palm on sapling performance in a Neotropical rainforest
Open the record for dataset details and reuse information.
Informatics and statistics for: Stable coexistence or competitive exclusion? Fern endophytes demonstrate rapid turnover favoring a dominant fungus
<p>Fungal endophytes are critical members of the plant microbiome, but their community dynamics throughout an entire growing season are underexplored. Additionally, most fungal endophyte research has centered on seed-reproducing hosts, while spore-reproducing plants spend a significant proportion of their lifecycle in a haploid state and may filter vertically-transmitted fungi. In order to examine annual fungal endophyte community dynamics in a spore-reproducing host, we examined endophytes in a single population of ferns, <i>Polystichum munitum</i>, in the Pacific Northwest. Through culture-independent sequencing, we characterized the community assembly and temporal turnover of foliar endophytes throughout a growing season. From these results, we selected endophytes with outsized representations in sequence data and performed <i>in vitro</i> competition assays. Finally, we inoculated sterile fern gametophytes with dominant fungi observed in the field and determined their effects on host performance. Sequencing demonstrated that ferns were colonized by a diverse community of fungal endophytes in newly-emerged tissue, but diversity decreased throughout the season leading to the preponderance of a single fungus in later sampling months. This previously-undescribed endophyte appears to form specialized associations with the fern. While competition assays on a variety of media types failed to demonstrate that the dominant fungus was competitive against other fungi isolated from the same hosts, inoculation onto sterile fern gametophytes resulted in increased host growth suggesting mutualistic effects. When considering the potential for other fungi to act antagonistically on ferns in nature, the presence of this fungus may drive host success within the study site and possibly throughout its growing range.</p>
Informatics and statistics for: Stable coexistence or competitive exclusion? Fern endophytes demonstrate rapid turnover favoring a dominant fungus
Open the record for dataset details and reuse information.
Data from: Carryover effects drive competitive dominance in spatially structured environments
Open the record for dataset details and reuse information.
Clonal competition with alternating dominance in multiple myeloma [244kCGH]
GEO Series GSE36822. Homo sapiens. 55 samples. Type: Genome variation profiling by array.
Clonal competition with alternating dominance in multiple myeloma [44kCGH]
GEO Series GSE36823. Homo sapiens. 7 samples. Type: Genome variation profiling by array.
Clonal competition with alternating dominance in multiple myeloma
GEO Series GSE36825. Homo sapiens. 104 samples. Type: Genome variation profiling by array; Expression profiling by array.
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.