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33 results for “grassland dominants”
Data from: Intraspecific variation of a dominant grass and local adaptation in reciprocal garden communities along a US Great Plains’ precipitation gradient: implications for grassland restoration with climate change
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Data from: Sensitivity of plant species to warming and altered precipitation dominates the community productivity in a semiarid grassland on the Loess Plateau
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Data from: Structural, compositional and trait differences between native and non-native dominated grassland patches
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Data from: Arbuscular mycorrhizal fungal communities associated with two dominant species differ in their responses to long-term nitrogen addition in temperate grasslands
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Data from: Genetic sorting of subordinate species in grassland modulated by intraspecific variation in dominant species.
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Data from: Phenology differences between native and novel exotic-dominated grasslands rival the effects of climate change
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Large herbivores facilitate a dominant grassland plant via multiple indirect effects
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Data for: Effects of fire on ground-dwelling arthropods in a shrub-dominated grassland
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Can prescribed fires restore C4 grasslands invaded by a C3 woody species and a co-dominant C3 grass species?
<p>Prescribed fire is used to reduce woody plant invasion and restore herbaceous production and diversity in grasslands and savannas worldwide. Here we determined if a concentrated series of repeated-winter, repeated-summer, or alternate-season (winter and summer) fires in a short timeframe ("transition fires") could catalyze the restoration of C<sub>4</sub> perennial grasses in Southern Great Plains, USA grasslands that had become dominated by a fire-tolerant C<sub>3</sub> woody N<sub>2</sub>-fixer (honey mesquite, <i>Prosopis glandulosa</i>) and a C<sub>3</sub> perennial bunchgrass (Texas wintergrass, <i>Nassella leucotricha</i>). We applied transition fires over a 5-year span, and maintenance fires on a portion of each plot 7 or 8 years later. We measured herbaceous standing biomass and cover and soil variables (soil organic C, N, δ<sup>13</sup>C and δ<sup>15</sup>N) in unburned, transition-burned and maintenance-burned treatments. Greater δ<sup>13</sup>C at 10-20 (-17 ‰) than 0-10 (-20 ‰) cm depth increment confirmed that vegetation was historically mostly C<sub>4</sub> grassland that shifted towards C<sub>3</sub> dominance. Transition treatments with summer fire were most effective at top-killing mesquite, but no treatments root-killed >3%. Regrowth of top-killed mesquite was similar in all treatments and reached pre-fire height by 9 to 10 years post-fire. Herbaceous production and cover responses showed that: (1) alternate-season transition fires increased C<sub>4</sub> mid-grass, but did not change Texas wintergrass, (2) repeated-summer fires reduced Texas wintergrass, but did not change C<sub>4</sub> mid-grass, and (3) repeated-winter fires did not change C<sub>4</sub> mid-grass or Texas wintergrass compared to the unburned control. All maintenance fires stimulated Texas wintergrass biomass and cover, thus eliminating the reduction of Texas wintergrass caused by repeated-summer transition fires. There were no long-term effects of transition fires on soil C, N, δ<sup>13</sup>C or δ<sup>15</sup>N. Results advance our understanding of the expectations and limitations of prescribed fire in shifting a woodland alternate state toward what was historically a fire supported C<sub>4</sub> grassland/savanna.</p>
Data from: Direct effects dominate responses to climate perturbations in grassland plant communities
Theory predicts that strong indirect effects of environmental change will impact communities when niche differences between competitors are small and variation in the direct effects experienced by competitors is large, but empirical tests are lacking. Here we estimate negative frequency dependence, a proxy for niche differences, and quantify the direct and indirect effects of climate change on each species. Consistent with theory, in four of five communities indirect effects are strongest for species showing weak negative frequency dependence. Indirect effects are also stronger in communities where there is greater variation in direct effects. Overall responses to climate perturbations are driven primarily by direct effects, suggesting that single species models may be adequate for forecasting the impacts of climate change in these communities.
Can prescribed fires restore C4 grasslands invaded by a C3 woody species and a co-dominant C3 grass species?
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Data from: Direct effects dominate responses to climate perturbations in grassland plant communities
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Data from: Ecotypes of an ecologically dominant prairie grass (Andropogon gerardii) exhibit genetic divergence across the U.S. Midwest grasslands environmental gradient
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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.