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62 results for “niche size”
Data from: Naturalized distributions show that climatic disequilibrium is structured by niche size in pines (Pinus L.)
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Data and Code for: Isotopic Niche Size of Coregonus artedi (sensu lato) Increases in the Presence of Mysis diluviana, Expanded Habitat Use and Phenotypic Diversity
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Data from: Niche and range size patterns suggest that speciation begins in small, ecologically diverged populations in North American monkeyflowers (Mimulus spp.)
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Data from: Prey size and dietary niche of Rafinesque’s big-eared bat (Corynorhinus rafinesquii)
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Data from: Increased energy promotes size-based niche availability in marine mollusks
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Data from: Trophic niches of Collembola communities change with elevation but also with body size and life form
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Vertical niche and elevation range size in tropical ants: implications for climate resilience
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Data from: Trophic niche width increases with bill size variation in a generalist passerine: a test of the niche variation hypothesis
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Data from: Species interactions, environmental gradients and body size shape population niche width
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Data from: Ecological explanations to island gigantism: dietary niche divergence, predation and size in an endemic lizard
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Dataset for estimation of the biotic and climatic niche breadths and geographic range size of beech (Fagus) species worldwide
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Data from: Increasing zooplankton size diversity enhances the strength of top-down control on phytoplankton through diet niche partitioning
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Data from: Non-random latitudinal gradients in range size and niche breadth predicted by spatial patterns of climate
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Data from: Trophic niche size and overlap decreases with increasing ecosystem productivity
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Data from: Dispersal, niche breadth, and population extinction/colonization ratios predict range size in North American dragonflies
1. Species' range sizes are shaped by fundamental differences in species' ecological and evolutionary characteristics, and understanding the mechanisms determining range size can shed light on the factors responsible for generating and structuring biological diversity. Moreover, because geographic range size is associated with a species' risk of extinction and their ability to respond to global changes in climate and land use, understanding these mechanisms has important conservation implications. 2. Despite hypotheses that dispersal behaviour is a strong determinant of species range areas, few data are available to directly compare the relationship between dispersal behaviour and range size. Here, we overcome this limitation by combining data from a multi-species dispersal experiment with additional species-level trait data that are commonly hypothesized to affect range size (e.g. niche-breadth, local abundance, and body size, etc.). This enables us to examine the relationship between these species-level traits and range size across North America for fifteen dragonfly species. 3. Ten models based on a priori predictions about the relationship between species traits and range size were evaluated and two models were identified as good predictors of species range size. These models indicated that only two species' level traits, dispersal behaviour and niche breadth were strongly related to range size. The evidence from these two models indicated that dragonfly species that disperse more often and further had larger North American ranges. 4. Extinction and colonization dynamics are expected to be a key linkage between dispersal behaviour and range size in dragonflies. To evaluate how extinction and colonization dynamics among dragonflies were related to range size we used an independent data set of extinction and colonization rates for eleven dragonfly species and assessed the relationship between these populations rates and North American range areas for these species. 5. We found a negative relationship between North American range size and species' extinction to colonization ratios. Our results indicate that metapopulation dynamics act to shape the extent of species' continental distributions. These population dynamics are likely to interact with dispersal behaviour, particularly at species range margins, to determine range limits and ultimately species range sizes.
Niche partitioning within a population of seasnakes is constrained by ambient thermal homogeneity and small prey size
<p>In many populations of terrestrial snakes, an individual's phenotype (e.g. body size, sex, colour) affects its habitat use. One cause for that link is gape-limitation, which can result in larger snakes eating prey that are found in different habitats. A second factor involves thermoregulatory opportunities, whereby individuals select habitats based upon thermal conditions. These ideas predict minimal intraspecific variation in habitat use in a species that eats small prey and lives in a thermally uniform habitat – such as the seasnake <i>Emydocephalus annulatus</i>, that feeds on tiny fish eggs and lives in inshore coral-reefs. To test that prediction, we gathered data on water depths and substrate attributes for 1475 sightings of 128 free-ranging <i>E. annulatus</i> in a bay near Noumea, New Caledonia. Habitat selection varied among individuals, but with a preference for coral-dominated substrates. A snake's body size and reproductive state affected its detectability in deep water, but overall habitat use was not linked to snake body size, colour morph, sex, or pregnancy. A lack of ontogenetic shifts in habitat use allows extreme philopatry in <i>E. annulatus</i>, thereby reducing gene flow among populations and potentially, delaying recolonization after local extirpation events.</p>
Data from: Dispersal, niche breadth, and population extinction/colonization ratios predict range size in North American dragonflies
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Niche partitioning within a population of seasnakes is constrained by ambient thermal homogeneity and small prey size
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Data from: Testing the niche breadth-range size hypothesis: habitat specialization versus performance in Australian alpine daisies
Relatively common species within a clade are expected to perform well across a wider range of conditions than their rarer relatives, yet experimental tests of this "niche breadth—range size" hypothesis remain surprisingly scarce. Rarity may arise due to trade-offs between specialization and performance across a wide range of environments. Here we use common garden and reciprocal transplant experiments to test the niche breadth—range size hypothesis, focusing on four common and three rare endemic alpine daisies (Brachyscome spp.) from the Australian Alps. We used three experimental contexts: 1) alpine reciprocal seedling experiment: a test of seedling survival and growth in three alpine habitat types differing in environmental quality and species diversity, 2) warm environment common garden: a test of whether common daisy species have higher growth rates and phenotypic plasticity, assessed in a common garden in a warmer climate and run simultaneously with experiment 1, and 3) alpine reciprocal seed experiment: a test of seed germination capacity and viability in the same three alpine habitat types as in experiment 1. In the alpine reciprocal seedling experiment, survival of all species was highest in the open heathland habitat where overall plant diversity is high, suggesting a general, positive response to a relatively productive, low-stress environment. We found only partial support for higher survival of rare species in their habitats of origin. In the warm environment common garden, three common daisies exhibited greater growth and biomass than two rare species, but the other rare species performed as well as the common species. In the alpine reciprocal seed experiment, common daisies exhibited higher germination across most habitats, but rare species maintained a higher proportion of viable seed in all conditions, suggesting different life history strategies. These results indicate that some but not all rare, alpine endemics exhibit stress tolerance at the cost of reduced growth rates in low-stress environments compared to common species. Finally, these findings suggest the seed stage is important in the persistence of rare species, and they provide only weak support at the seedling stage for the niche breadth-range size hypothesis.
Data from: Testing the niche breadth-range size hypothesis: habitat specialization versus performance in Australian alpine daisies
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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)
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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.