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.
47
datasets available to search
ShareScore release 0.9.0
Dataset results
47 results for “competitive ability”
Data files for Competitive ability depends on mating system and ploidy level across Capsella species
<p>The three data files associated with the article:</p> <p>Competitive ability depends on mating system and ploidy level across Capsella species. Annals Of Botany 2022: doi.org/10.1093/aob/mcac044</p> <p>See README for details on each files</p>
Datasets for "Intraspecific interactions in the annual legume Medicago minima are shaped by both genetic variation for competitive ability and reduced competition among kin"
<p>Datasets for “Intraspecific interactions in the annual legume <em>Medicago minima</em> are shaped by both genetic variation for competitive ability and reduced competition among kin”</p> <p>Two datasets are provided.</p> <p>root_behavior_experiment_for_ms.csv: provides data relative to a root behaviour experiment where <em>Medicago minima</em> genotypes grew either with a kin or a non kin. Direction of root growth, root length and biomass were measured.</p> <p>Medicago_minima_biomass_dataMerge.csv: provides data relative to a minicommunity experiment where <em>Medicago minima </em>genotypes were grown surrounded by three kin genotypes, or three non-kin genotypes (i.e. stranger to the central plant but identical to each other) or three stranger genotypes (stranger to the central plant and to each other). For this second experiment above-ground growth and biomass were monitored.</p> <p>Detailed information on the dataset variables are provided in the metadata file.</p> <p>Code for data wrangling and analyses is included in the manuscript as an appendix.</p>
Increased allocation to reproduction reduces future competitive ability in a burying beetle
<p>1. The existence of a trade-off between current and future reproduction is a fundamental prediction of life-history theory. Support for this prediction comes from brood size manipulations, showing that caring for enlarged broods often reduces the parent's future survival or fecundity. However, in many species, individuals must invest in competing for the resources required for future reproduction. Thus, a neglected aspect of this trade-off is that increased allocation to current reproduction may reduce an individual's future competitive ability.</p> <p>2. We tested this prediction in the burying beetle, Nicrophorus vespilloides, a species where parents care for their offspring and where there is fierce competition for resources used for breeding.</p> <p>3. We manipulated reproductive effort by providing females with either a small brood of 10 larvae or a large brood of 40 larvae and compared the ability of these females, and virgin females that had no prior access to a carcass, to compete for a second carcass against a virgin competitor.</p> <p>4. We found that increased allocation to current reproduction reduced future competitive ability, as females that had cared for a small brood were more successful when competing for a second carcass against a virgin competitor than females that had cared for a large brood. In addition, the costs of reproduction were offset by the benefits of feeding from the carcass during an initial breeding attempt, as females that had cared for a small brood were better competitors than virgin females that had no prior access to a carcass, whilst females that had cared for a large brood were similar in competitive ability to virgin females.</p> <p>5. Our results add to our understanding of the trade-off between current and future reproduction by showing that this trade-off can manifest through differences in future competitive ability and that direct benefits of reproduction can offset some of these costs. 16-Apr-2020</p>
Older populations of the invader Solidago canadensis exhibit stronger positive plant-soil feedbacks and competitive ability in China
<p><strong>PREMISE</strong></p> <p>The enemy release hypothesis predicts that release from natural enemies, including soil-borne pathogens, liberates invasive plants from a negative regulating force. Nevertheless, invasive plants may acquire novel enemies and mutualists in the introduced range, which may cause variable effects on invader growth. However, how soil microorganisms may influence competitive ability of invasive plants along invasion chronosequences has been little explored.</p> <p><strong>METHODS</strong></p> <p>Using the invasive plant <em>Solidago canadensis</em>, we tested whether longer residence times are associated with stronger negative plant-soil feedbacks and thus weaker competitive abilities at the individual level. We grew S. canadensis individuals from 36 populations with different residence times in competition versus no competition and in three different types of soils: (1) conspecific rhizospheric soils, (2) soil from uninvaded patches, and (3) sterilized soil. For our competitor treatments, we constructed synthetic communities of four native species <em>Bidens parviflora, Solanum nigrum, Kalimeris indica,</em> and <em>Mosla scabra</em>, which naturally co-occur with <em>S. canadensis</em> in the field.</p> <p><strong>RESULTS</strong></p> <p>Solidago canadensis populations with longer residence times experienced stronger positive plant-soil feedbacks and had greater competitive responses (i.e., produced greater above-ground biomass and grew taller) in conspecific rhizospheric soils than in sterilized and uninvaded soils. Moreover, <em>S. canadensis</em> from older populations significantly suppressed above-ground biomass of the native communities in rhizospheric and uninvaded soils but not in sterilized soil.</p> <p><strong>CONCLUSIONS</strong></p> <p>The present results suggest that older populations of <em>S. canadensis</em> experience stronger positive plant-soil feedback, which may enhance their competitive ability against native plant communities. </p>
Data from: A test of the competitive ability – cold tolerance trade-off hypothesis in seasonally breeding beetles
<p><span>Closely related species that use similar resources often differ in their seasonal patterns of activity, but the factors that limit their distributions across seasons are unknown for most species. One hypothesis to explain seasonal variation in the distributions of species involves a trade-off between competitive ability and cold tolerance, where tolerance to the cold compromises competitive ability in warmer (benign) temperatures, either at the level of the individual or population.</span></p> <p><span>We tested both individual-level and population-level mechanisms of this hypothesis in two co-occurring species of temperate burying beetles (Silphidae: <em>Nicrophorus sayi</em>, <em>N. orbicollis</em>) that differ in their seasonal patterns of activity.</span></p> <p><span>We measured cold tolerance, breeding activity as a function of temperature, and competitive ability as a function of temperature and season.</span></p> <p><span>Consistent with our hypothesis, the mid-season <em>N. orbicollis</em> was less able to function at the cold temperatures that characterize early spring, when the early-season <em>N. sayi</em> is most active. The larger beetle, however, always won one-on-one competitive trials at warm temperatures, regardless of species, inconsistent with an individual-level trade-off. <em>N. orbicollis</em> was usually larger and successful when competing for the same carrion later in the season, mostly because of its larger population size, consistent with a trade-off between competitive ability and cold tolerance acting at the population level.</span></p> <p><span>Our findings suggest that cold temperatures limit the mid-season <em>N. orbicollis</em> from earlier spring emergence, while competitive pressure from the more abundant, larger <em>N. orbicollis</em> constrains the early-season <em>N. sayi</em> from remaining active through the summer.</span></p>
Trade-offs between immunity and competitive ability in fighting ant males
<p><span><strong>Background:</strong> </span><span>Fighting disease while fighting rivals exposes males to constraints and trade-offs during male-male competition. We here tested how both the stage and intensity of infection with the fungal pathogen <em>Metarhizium robertsii</em> interfered with fighting success in <em>Cardiocondyla</em> <em>obscurior</em> ant males. Males of this species have evolved long lifespans during which they can gain many matings with the young queens of the colony, if successful in male-male competition. Since male fights occur inside the colony, the outcome of male-male competition can further be biased by interference of the colony's worker force.</span></p> <p><span><strong>Results:</strong> </span><span>We found that severe, but not yet mild, infection strongly impaired male fighting success. In late-stage infection, this could be attributed to worker aggression directed towards the infected rather than the healthy male and an already very high male morbidity even in the absence of fighting. Shortly after pathogen exposure, however, male mortality was particularly increased during combat. Since these males mounted a strong immune response, their reduced fighting success suggests a trade-off between immune investment and competitive ability already early in the infection. Even if the males themselves showed no difference in the number of attacks they raised against their healthy rivals across infection stages and levels, severely infected males were thus losing in male-male competition from an early stage of infection on.</span></p> <p><span><strong>Conclusions:</strong> </span><span>Males of the ant <em>C. obscurior </em>have evolved high immune investment, triggering an effective immune response very fast after fungal exposure. This allows them to cope with mild pathogen exposures without cost to their success in male-male competition, and hence to gain multiple mating opportunities with the emerging virgin queens of the colony. Under severe infection, however, they are weak fighters and rarely survive combat already at early infection when raising an immune response, as well as at progressed infection, when they are morbid and preferentially targeted by worker aggression. Workers thereby remove males that pose a future disease threat by biasing male-male competition. Our study thus revealed a novel social immunity mechanism for how social insect workers protect the colony against disease risk.</span></p>
Data from: Life in the cystic fibrosis upper respiratory tract influences competitive ability of the opportunistic pathogen Pseudomonas aeruginosa
Open the record for dataset details and reuse information.
Trade-offs between immunity and competitive ability in fighting ant males
Open the record for dataset details and reuse information.
Increased allocation to reproduction reduces future competitive ability in a burying beetle
Open the record for dataset details and reuse information.
Data from: Evolution of competitive ability and the response to nutrient availability: A resurrection study with the calcareous grassland herb, Leontodon hispidus
Open the record for dataset details and reuse information.
Data from: Response of bluebunch wheatgrass to invasion: differences in competitive ability among invader-experienced and naïve populations
Open the record for dataset details and reuse information.
Data from: A test of the competitive ability – cold tolerance trade-off hypothesis in seasonally breeding beetles
Open the record for dataset details and reuse information.
Data from: Competitive ability of native and alien plants: effects of residence time and invasion status
Open the record for dataset details and reuse information.
Data from: Unravelling the impact of domestication on competitive ability in durum wheat: A phenotypic plasticity perspective
Open the record for dataset details and reuse information.
Older populations of the invader Solidago canadensis exhibit stronger positive plant-soil feedbacks and competitive ability in China
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: Evolution of increased Medicaco polymorpha size during invasion does not result in increased competitive ability
Species invading new habitats experience novel selection pressures that can lead to rapid evolution, which may contribute to invasion success and/or increased impact on native community members. Many studies have hypothesized that plants in the introduced range will be larger than those in the native range, leading to increases in competitive ability. There is mixed support for evolution of larger sizes in the introduced range, but few studies have explicitly tested whether evolutionary changes result in decreased competitive responses or increased competitive effects on other species in the community. Here we show that introduced Medicago polymorpha genotypes produced 14% more aboveground and 41% more belowground biomass than genotypes from the native range, suggesting evolutionary changes in size occurred after introduction. However, these size differences were only observed in the absence of competition. The competitive effects of introduced and native range genotypes on three species that commonly co-occur with Medicago in invaded regions were remarkably similar. These results suggest that evolutionary increases in size during biological invasions do not necessarily alter the competitive effects of the invader on other community members but may increase invasion success in disturbed or low competition environments.
Data from: Parental environmental effects due to contrasting watering adapt competitive ability, but not drought tolerance, in offspring of a semi-arid annual Brassicaceae
1. Parental effects (PE) can be adaptive and improve offspring performance when parents and offspring experience similar environmental conditions. However, it is unknown whether adaptive PE exist also in habitats where such similarity is unlikely due to strong temporal variation. In particular, we do not know whether PE can adapt offspring to fluctuating levels of neighbour competition in such habitats. 2. Here, we tested for adaptive PE in terms of two key environmental factors in a semi-arid annual system, competition and drought. While rainfall was stochastic in the study site, the competitive environment was partly predictable: higher plant densities followed after favourable (rainy) years due to high seed production. We therefore expected PE to adapt the offspring's competitive ability to these (predictable) fluctuations in plant densities, rather than to adapt the offspring's drought tolerance to the (unpredictable) occurrence of intensified drought. 3. Parental plants of Biscutella didyma, an annual Brassicaceae, were raised under favourable watering and under drought conditions. Offspring performance was then tested under a full-factorial combination of two neighbour regimes and six watering levels in the glasshouse. 4. Offspring of parents grown under favourable conditions were stronger competitors. This was associated with a small shift in phenology but not with higher parental seed provisioning. Offspring from parents grown under drought showed no improved drought tolerance. Moreover, no PE were detectable when offspring were grown without neighbours. 5. Our results suggest a novel path of adaptive PE: higher competitive ability was induced in offspring that were more likely to experience high neighbour densities. Together with the lack of adaptive PE towards drought tolerance, this emphasizes that a correlation between parental and offspring environment is crucial for adaptive PE to evolve. Our results also call for the inclusion of competitive effects in future PE studies. 6. Synthesis. This study demonstrates the important role of adaptive PE for plant fitness (regarding competition) but also their limits (regarding drought) in temporally variable environments, based on the predictability of the respective environmental factor.
Polyploidization contributes to evolution of competitive ability: a long term common garden study on the invasive Solidago canadensis in China
<p>Plant invasion initiates with the establishment of an alien species population that begins interacting with the existing community in the invaded habitat. Competitive ability may confer advantage to invasive species during establishment. Autopolyploidy has been shown to significantly contribute to successful invasion of China by Solidago canadensis that is native to North America. But how polyploidization improves competitive ability and determines the dominance of invasive species when competing with a plant community in the introduced range remains unclear. Here, we manipulated the initial plant composition of plowed land and subsequently allowed natural colonization by S. canadensis in a five-year common garden experiment. Diploid, tetraploid and hexaploid populations collected in North America (native range) and East Asia (introduced range) were separately planted and allowed to compete with associated weeds in individual plots. The diversity and compositional variation of the plant communities and the growth characteristics of S. canadensis were investigated in summer and autumn each year. Based on how the community assembled, three outcomes were found: 1) S. canadensis outcompeted local vegetation: tetraploids and hexaploids from the introduced range outcompeted associated weeds and were dominant at equilibrium; 2) S. canadensis coexisted with local vegetation: hexaploids from the native range were competitive but ultimately could not outcompete the local vegetation; and 3) S. canadensis became extinct: diploids from both the native and introduced ranges and tetraploids from the native range went extinct. Concomitantly, diversity was low in the first group and high in the second and third. Therefore, polyploidization contributes to the pre differentiation of competitive ability among native S. canadensis populations, facilitatating the invasion of China by this species. The competitive ability of polyploids was enhanced through possible rapid post introduction evolution after their introduction into China, which could be the crucial factor for successful invasion by S. canadensis.</p>
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.