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31 results for “temporal shifts”
Data from: Temporal patterns of diversification in Brassicaceae demonstrate decoupling of rate shifts and mesopolyploidization events
Background and Aims Whole-genome duplication (WGD) events are considered important driving forces of diversification. At least 11 out of 52 Brassicaceae tribes had independent mesopolyploid WGDs followed by diploidization processes. However, the association between mesopolyploidy and subsequent diversification is equivocal. Herein we show the results from a family-wide diversification analysis on Brassicaceae, and elaborate on the hypothesis that polyploidization per se is a fundamental driver in Brassicaceae evolution. Methods We established a time-calibrated chronogram based on whole plastid genomes comprising representative Brassicaceae taxa and published data spanning the entire Rosidae clade. This allowed to set multiple calibration points and anchored various Brassicaceae taxa for subsequent downstream analyses. All major splits among Brassicaceae lineages were used in BEAST analyses of individually analysed 48 tribes comprising 2101 taxa in total using the internal transcribed spacers of nuclear ribosomal DNA. Diversification patterns were investigated on these tribe-wide chronograms using BAMM and were compared with family-wide data on genome size variation and species richness. Key results Brassicaceae diverged 29.9 Mya during the Oligocene, and the majority of tribes started diversification in the Miocene with an average crown group age of about 12.5 Mya. This matches the cooling phase right after the Mid Miocene climatic optimum. Significant rate shifts were detected in 12 out of 52 tribes during the Mio- and Pliocene, decoupled from preceding mesopolyploid WGDs. Among the various factors analysed the combined effect of tribal crown group age and net diversification rate (speciation minus extinction) is likely to explain sufficiently species richness across Brassicaceae tribes. Conclusions The onset of the evolutionary splits among tribes took place under cooler and drier conditions. Pleistocene glacial cycles may have contributed to the maintenance of high diversification rates. Rate shifts are not consistently associated with mesopolyploid WGD. We propose, therefore, that WGDs in general serve as a constant "pump" for continuous and high species diversification.
DATASET Temporal shifts in algal and fish assemblages following the introduction of herbivorous species in coral reef patches (Bora Bora Island)
<p>Dataset suporting the study of fish succession in Bora Bora</p>
Temporal changes in predator density are linked to shifts in prey behavior, mortality, and abundance in the field
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Data from: Temporal patterns of diversification in Brassicaceae demonstrate decoupling of rate shifts and mesopolyploidization events
Open the record for dataset details and reuse information.
Data from: Temporal shifts and temperature sensitivity of avian spring migratory phenology: a phylogenetic meta-analysis
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A temporal shift in regulatory networks and pathways in the bovine small intestine during Cooperia oncophora infection
GEO Series GSE11950. Bos taurus. 20 samples. Type: Expression profiling by array.
Temporal Shift of Circadian-Mediated Gene Expression and Carbon Fixation Contributes to Biomass Heterosis in Maize Hybrids
GEO Series GSE67655. Zea mays. 48 samples. Type: Genome binding/occupancy profiling by high throughput sequencing.
A temporal map of maternal immune activation-induced changes reveals a shift in neurodevelopmental timing and perturbed cortical development in mice
GEO Series GSE166376. Mus musculus. 74 samples. Type: Expression profiling by high throughput sequencing.
Temporal profiling of male cortical astrocyte transcription predicts molecular shifts from early development to aging
GEO Series GSE272573. Mus musculus. 34 samples. Type: Expression profiling by high throughput sequencing.
Temporal dynamics of transcriptome change in Drosophila S2R+ cells after a temperature shift from 25 to 14°C
GEO Series GSE159172. Drosophila melanogaster. 23 samples. Type: Expression profiling by array.
Genome-wide temporal gene expression reveals a post-reproductive shift in the nematode C. briggsae
GEO Series GSE285675. Caenorhabditis briggsae. 12 samples. Type: Expression profiling by high throughput sequencing.
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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.