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91 results for “African savannas”
Data, code, and metadata for: Symbiotic acacia ants drive nesting behavior by birds in an African savanna
<p>Data, code, and metadata that can be used to reproduce the analyses underlying 'Symbiotic acacia ants drive nesting behavior by birds in an African savanna' by Lujan, Nielsen et al. 2023 Biotropica (Preprint: https://doi.org/10.1101/2023.03.06.531340).</p><p>Individual data owners are detailed in the data. Data may only be used to reproduce the analyses underlying Lujan, Nielsen, et al. (2023). Any other use requires the written permission of the data owners.</p><p>For more detailed information, please visit the metadata file.</p>
Limited ant co-occurrence and defensive mutualism in Acacia plants in a West African savanna
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Ecological consequences of large herbivore exclusion in an African savanna: 12 years of data from the UHURU experiment
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Data: Drought and fire determine juvenile and adult woody diversity and dominance in a semi-arid African savanna
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Native plant species show evolutionary responses to invasion by Parthenium hysterophorus in an African savanna
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Associations between Lantana camara L. (Verbenaceae) and common native species in an African savanna
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Data from: Simulated poaching affects global connectivity and efficiency in social networks of African savanna elephants—An exemplar of how human disturbance impacts group-living species
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Large herbivores suppress liana infestation in an African savanna
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Protecting the resource: an assessment of mitigation methods used to protect large trees from African elephant impact in a savanna system
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Data from: Herbivore size matters for productivity-richness relationships in African savannas
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Fire, grazers and browsers interact with grass competition to determine tree establishment in an African savanna
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Resistance of termite mounds to variation in long-term fire regimes across semi-arid African savannas
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Data for: Steal the rain: Interception loses and rainfall partitioning by a broad-leaf and a fine-leaf woody encroaching species in a southern African semi-arid savanna
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Wild herbivores enhance resistance to invasion by exotic cacti in an African savanna
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Ecosystem-wide responses to fire and large mammal herbivores in an African savanna
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Woody encroachment happens via intensification, not extensification, of species ranges in an African savanna
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Water economics of African savanna herbivores: How much does plant moisture matter?
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Effects of long-term fixed fire regimes on African savanna vegetation biomass, vertical structure and tree stem density
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Genetic connectivity and population structure of African savanna elephants (Loxodonta africana) in Tanzania
<p>Increasing human population growth, exurban development, and associated habitat fragmentation is accelerating the isolation of many natural areas and wildlife populations across the planet. In Tanzania, rapid and ongoing habitat conversion to agriculture has severed many of the country's former wildlife corridors between protected areas. To identify historically-linked protected areas, we investigated the genetic structure and gene flow of African savanna elephants in Tanzania using microsatellite and mitochondrial DNA markers in 688 individuals. Our results indicate distinct population genetic structure within and between ecosystems across Tanzania, and reveal important priority areas for connectivity conservation. Elephants sampled from the Tarangire-Manyara ecosystem appear marginally, yet significantly isolated from elephants sampled from the greater Serengeti ecosystem (mean FST = 0.03), where two distinct subpopulations were identified.Unexpectedly, elephants in the Lake Manyara region appear to be more closely related to those across the East African Rift wall in the Ngorongoro Conservation Area than they are to the neighboring Tarangire subpopulations. We concluded that the Rift wall has had a negligible influence on genetic differentiation up to this point, but differentiation may accelerate in the future because of ongoing loss of corridors in the area. Interestingly, relatively high genetic similarity was found between elephants in Tarangire and Ruaha although they are separated by >400 km. In southern Tanzania, there was little evidence of female-mediated gene flow between Ruaha and Selous, probably due to the presence of the Udzungwa Mountains between them. Despite observing evidence of significant isolation, the populations of elephants we examined generally exhibited robust levels of allelic richness (mean AR = 9.96), heterozygosity (mean µHE = 0.73), and effective population sizes (mean Ne = 148). Our results may inform efforts to restore wildlife corridors between protected areas in Tanzania in order to facilitate gene flow for long-term survival of elephants and other species.</p>
Data from: Woody cover in wet and dry African savannas after six decades of experimental fires
1. Fire is an integral process in savannas because it plays a crucial role in altering woody cover of this globally important biome. 2. In this study we examine the long term effects of varying fire frequencies over a 60 year time period in South Africa. We analyse the effects of fire exclusion and of experimental burns every 1, 2 and 3 years on woody cover, tree abundance and stem structure on a wet and dry savanna. 3. Increased fire frequency did not display a consistent effect on woody cover. The presence of fire, irrespective of frequency, was much more influential in lowering tree abundance in the wet savanna than the dry savanna. In the dry savanna, fire was more effective in greatly increasing coppicing in trees, when compared to the wet savannas. 4. Synthesis: The effects of fire on three measures of savanna woody vegetation differed between wet and dry experimental sites. We suggest that vegetation responses to fire are dependent on local conditions, which are likely influenced by rainfall. Therefore we suggest that management strategies should take account of whether a savanna is a wet or dry system when implementing fire management regimes.
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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.