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96 results for “positive feedback”
Data from: de-stabilizing innate immunity in Covid-19: effects of its own positive feedback and erratic viremia on the alternative pathway of complement
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Data from: Density-dependent positive feedbacks buffer aquatic plants from interactive effects of eutrophication and predator loss
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Data from: Plant-soil feedbacks shift from negative to positive with decreasing light in forest understory species
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Data from: Mechanisms of resilience: empirically quantified positive feedbacks produce alternate stable states dynamics in a model of a tropical reef
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Data from: Invasion-mediated effects on marine trophic interactions in a changing climate: positive feedbacks favour kelp persistence
The interactive effects of ocean warming and invasive species are complex and remain a source of uncertainty for projecting future ecological change. Climate-mediated change to trophic interactions can have pervasive ecological consequences, but the role of invasion in mediating trophic effects is largely unstudied. Using manipulative experiments in replicated outdoor mesocosms, we reveal how near-future ocean warming and macrophyte invasion scenarios interactively impact gastropod grazing intensity and preference for consumption of foundation macroalgae (Ecklonia radiata and Sargassum vestitum). Elevated water temperature increased consumption of both macroalgae through greater grazing intensity. Given the documented decline of kelp (E. radiata) growth at higher water temperatures, enhanced grazing could contribute to the shift from kelp-dominated to Sargasssum-dominated reefs that is occurring at the low-latitude margins of kelp distribution. However, presence of a native invader (Caulerpa filiformis) was related to low consumption by the herbivores on dominant kelp at warmer temperatures. Thus, antagonistic effects between climate change and a range expanding species can favour kelp persistence in a warmer future. Introduction of species should, therefore, not automatically be considered unfavourable under climate change scenarios. Climatic changes are increasing the need for effective management actions to address the interactive effects of multiple stressors and their ecological consequences, rather than single threats in isolation.
Data from: Positive feedback between ecological and reproductive character displacement in a young avian hybrid zone
Character displacement can reduce costly interspecific interactions between young species. We investigated the mechanisms behind divergence in three key traits - breeding habitat choice, timing of breeding and plumage coloration - in Ficedula flycatchers. We found that male pied flycatchers became expelled from the preferred deciduous habitat into mixed forest as the superior competitor, collared flycatchers, increased in numbers. The peak in food abundance differs between habitats, and the spatial segregation was paralleled by an increased divergence in timing of breeding between the two species. Male pied flycatchers vary from brown to black with brown coloration being more frequent in sympatry with collared flycatchers, a pattern often proposed to result from selection against hybridization, i.e. reinforcement. In contrast to this view, we show that brown male pied flycatchers more often hybridize than black males. Male pied flycatcher plumage coloration influenced the territory obtained in areas of co-occurrence with collared flycatchers, and brown male pied flycatchers experienced higher relative fitness than black males when faced with heterospecific competition. We suggest that allopatric divergence in resource defense ability causes a feedback loop at secondary contact where male pied flycatchers with the most divergent strategy compared to collared flycatchers are favored by selection.
Data from: Invasion-mediated effects on marine trophic interactions in a changing climate: positive feedbacks favour kelp persistence
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Data from: Positive plant-soil feedbacks trigger tannin evolution by niche construction: a spatial stoichiometric model
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Data from: Positive feedback between ecological and reproductive character displacement in a young avian hybrid zone
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FOXO and HSF1 rejuvenate immunity via positive feedback regulation of insulin/IGF-1 signaling
GEO Series GSE137861. Caenorhabditis elegans. 12 samples. Type: Expression profiling by high throughput sequencing.
A positive feedback-loop regulates transcriptional response to murine pandemic influenza infection
GEO Series GSE67241. Mus musculus. 39 samples. Type: Expression profiling by array.
Maladaptive Positive Feedback Production of ChREBPβ Drives Glucotoxic β-Cell Failure
GEO Series GSE197864. Rattus norvegicus. 12 samples. Type: Expression profiling by high throughput sequencing.
m6A methylation regulates hypoxia-induced pancreatic cancer glycolytic metabolism through ALKBH5-HDAC4-HIF1α positive feedback loop
GEO Series GSE218546. Homo sapiens. 6 samples. Type: Expression profiling by high throughput sequencing.
HIF1α/HIF2α-miR210-3p network promotes glioblastoma proliferation and tumorigenesis through EGFR-PI3K/AKT signaling pathway with a positive feedback
GEO Series GSE142719. Homo sapiens. 15 samples. Type: Non-coding RNA profiling by high throughput sequencing.
ZNF252P promotes tumorigenesis by activating c-Myc-mediated positive feedback loop
GEO Series GSE271524. Homo sapiens. 6 samples. Type: Expression profiling by high throughput sequencing.
Bmp2 -driven terminal differentiation of the stomach epithelium is induced by an autocrine Bmp2 positive feedback loop and inhibited by H. pylori via Interferon gamma signaling [RNA-seq]
GEO Series GSE136653. Mus musculus. 8 samples. Type: Expression profiling by high throughput sequencing.
Bmp2 -driven terminal differentiation of the stomach epithelium is induced by an autocrine Bmp2 positive feedback loop and inhibited by H. pylori via Interferon gamma signaling [microarray]
GEO Series GSE136658. Mus musculus. 4 samples. Type: Expression profiling by array.
Positive auto-feedback regulation of Ptf1a transcription generates the levels of PTF1A required to specify dorsal spinal cord inhibitory neurons
GEO Series GSE146238. Mus musculus. 2 samples. Type: Expression profiling by high throughput sequencing.
YTHDF2-KIF26B-Wnt signaling forms a positive-feedback regulatory loop to maintain ISC stemness
GEO Series GSE290302. Mus musculus. 6 samples. Type: Expression profiling by high throughput sequencing.
An extracellular matrix-driven positive feedback loop regulates translation in Idiopathic Pulmonary Fibrosis
GEO Series GSE45686. Homo sapiens. 40 samples. Type: Expression profiling by array.
ScienceDex guides
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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.