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308 results for “density dependence”
From seed dispersal service to reproductive collapse: density-dependent outcome of a palm-mammal interaction
<p>Interspecific ecological interactions are inherently context-dependent. They may vary in both magnitude and sign depending on the biotic and abiotic conditions, depicting a mutualism-antagonism continuum. However, how population abundances and the activity of interacting species modulate these interactions remains underexplored. Here, we chose the interaction between the Mediterranean palm <em>Chamaerops</em> <em>humilis</em> and the feral goat <em>Capra</em> <em>hircus</em> in Mallorca (Balearic Islands, Spain). We selected three study plots with low, intermediate and high intensities of goat activity where we characterized palm distribution, seed rain, seed predation, and early palm recruitment during two consecutive years. Since goats can cause both costs (e.g. florivory) and benefits (e.g. seed dispersal) to <em>C. humilis</em> performance, we investigated the following three questions: (1) Does the spatial distribution of adult palms vary depending on the intensity of goat activity? (2) Does the intensity of goat activity influence seed rain and its potential spatial association with adult palms? (3) To what extent does the intensity of goat activity determine post-dispersal events such as seed predation and seedling emergence? We found that adult palms showed a more clumped and complex distribution (double-cluster process) in plots with low and intermediate goat activity compared to that with high goat activity (simple-cluster process). In the low goat activity plot, dispersed seeds were spatially aggregated around adult palms, showing twice insect-seed predation and nearly three times lower seed germination success than those in the intermediate goat activity plot. Palm seed dispersal and recruitment were almost nil in the high goat activity plot due to heavy consumption of palm inflorescences and developing fruits by goats. Our findings demonstrate how the net outcome of plant-animal interactions can change from mutualism to antagonism, from reproductive service to reproductive collapse, depending on the abundance and the activity of the interacting species.</p>
Data for "Negative density dependence promotes persistence of a globally rare yet locally abundant plant species (Oenoethera coloradensis)"
<p>This dataset was used to perform the analyses in the manuscript "Negative density dependence promotes persistence of a globally rare yet locally abundant plant species (Oenoethera coloradensis)"</p>
Is negative density-dependent reproduction regulated by density-induced stress in root voles? Two field experiments
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Data from: Negative density dependence in the mortality and growth of tropical tree seedlings is strong, and primarily caused by fungal pathogens
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Social selection is density dependent but makes little contribution to total selection in New Zealand giraffe weevils
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Insect root feeders incur negative density-dependent damage across plant species in an alpine meadow
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Species traits mediate environmental responses but not conspecific density dependence in tropical tree saplings
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Data from: Individual-level trait variation and negative density dependence affects growth in tropical tree seedlings
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Data for: Distance and density dependence in two native Bornean dipterocarp species
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Patterns of frequency and density dependence are highly variable in diverse annual flowering plant communities
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Demographic consequences of heterogeneity in conspecific density dependence among mast fruiting tropical trees
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Data from: Interspecific variation in conspecific negative density dependence can make species less likely to coexist
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Can livestock grazing dampen density dependent fluctuations in wild herbivore populations?
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Impacts of flowering density on pollen dispersal and gametic diversity are scale dependent
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Do natural enemies mediate conspecific negative distance- and density-dependence of trees? A meta-analysis of exclusion experiments
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From seed dispersal service to reproductive collapse: density-dependent outcome of a palm-mammal interaction
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Data from: Positive spatial and temporal density-dependence drive early reproductive economy-of-scale effects of masting in a European old-growth forest community
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Data from: Intraspecific variation mediates density dependence in a genetically diverse plant species
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Turning summer into winter: nutrient dynamics, temperature, density dependence, and invasive species drive bioenergetic processes and growth of a keystone coldwater fish
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Density dependence mediates the ecological impact of an invasive fish
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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.