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26 results for “perennial grass”
Data from: Experimental evaluation of the robustness of the growth-stress tolerance trade-off within the perennial grass Dactylis glomerata
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Induction and potential role of summer dormancy to enhance persistence of perennial grasses under warmer climates
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Invasion promotes invasion: facilitation of C3 perennial grass dominance
<p><b>1.</b> In the southern Great Plains (SGP) of the USA, encroachment of the native invasive woody legume, honey mesquite (<i>Prosopis glandulosa </i>Torr.), has caused a decline in C<sub>4</sub> mid-grass abundance. <i>Prosopis glandulosa</i> invasion has also facilitated growth of the C<sub>3</sub> mid-grass species, Texas wintergrass (<i>Nassella leucotricha </i>[Trin & Rupr.] Pohl) initially beneath its canopy but extending to interspaces between <i>P. glandulosa</i> as stand density increases. Little is known about the stability of the <i>Prosopis</i>/<i>Nassella</i> association, or C<sub>4</sub> grass recovery following <i>P. glandulosa</i> disturbance.</p> <p><b>2.</b> We quantified C<sub>3</sub> and C<sub>4</sub> grass production in interspaces, and basal cover in interspaces and <i>P. glandulosa</i> subcanopy microsites for 9 years following <i>P. glandulosa</i> suppression (top-kill) and compared this to untreated <i>P. glandulosa</i> woodland (woodland). </p> <p><b>3.</b> The <i>Prosopis</i>/<i>Nassella</i> association limited the window of C<sub>4</sub> mid-grass recovery to only a few years. <i>Nassella leucotricha</i> dominated grass production during the first 3 years after top-kill. C<sub>4</sub> mid-grass recovery began in year 4, but was interrupted by severe drought in years 5 through 7. Recovery resumed in year 8, due to above average summer rainfall, but <i>P. glandulosa</i> regrowth was large enough by this time to limit C<sub>4</sub> mid-grass production to a third of its potential. </p> <p><b>4.</b> <i>Nassella leucotricha</i> basal cover remained dominant and stable in woodland subcanopy microsites, even during drought, and only briefly declined in top-kill subcanopy microsites before returning to pre-treatment levels by year 8 as <i>P. glandulosa</i> regrowth increased and provided shade.</p> <p><b>5.</b> <i>Synthesis and applications</i>. A single suppression event had little impact on disrupting the<i> Prosopis</i>/<i>Nassella</i> association and allowing C<sub>4</sub> mid-grass recovery. The coupling of a deciduous, N-fixing C<sub>3</sub> woody species with this C<sub>3</sub> perennial grass may be a vegetative "state" that is resistant to multiple woody suppression disturbances, and permanently limits the transition back to C<sub>4</sub> grassland. </p>
Field survey quadrat data - Exotic perennial grass invasion profiles differ between temperate threatened grassy communities
<p><b>Aim</b>: Exotic perennial grasses are significant invaders of native grassy communities and frequently multiple species invade communities, some from nearby agricultural areas. There is little understanding of the landscape distribution of many species, making prioritisation for control a difficult decision.</p> <p><b>Location</b>: New South Wales, Eastern Australia</p> <p><b>Methods</b>: We undertook field surveys of exotic perennial grasses at 139 sites from nine grassy threatened ecological communities across four regions and assessed whether the profiles of exotic species varied amongst regions and communities. We used a ranking of invasion risk based on plant characteristics to identify exotic perennial grasses that were likely to be the most invasive and then tested whether this ranking predicted the level of invasion measured in the survey.</p> <p><b>Results</b>: Using multivariate analysis we found that the threatened grassy communities surveyed were significantly invaded by exotic perennial grasses and that these assemblages were regionally distinct and distinct for most plant communities. Five widespread invaders were particularly established in all regions and communities, but regions also had distinct sets of invaders contributing significantly to degradation. Invasion by trade-off species was the most significant threat to grassy communities in all regions. We showed that species with higher risk rankings based on plant characteristics were recorded in more sites but there were a few grasses that were more invasive than their ranking predicted.</p> <p><b>Main conclusions</b>: Our findings indicate that management of grassy plant communities for exotic perennial grasses should be undertaken at the community level although there are a suite of species that are important invaders in the whole landscape where improved understanding of pathways of invasion are needed for management across regions. We identified a set of species which are important invaders but are not a focus in management currently, largely because many of these are species used in pastures. Our study illustrates that higher levels of invasion were associated with species that were ranked more invasive on plant characteristics and this ranking could be used to initially allocate priorities for management of threatened plant communities. Trade-off species remain the major cause of degradation and must be included in discussions of regional conservation.</p>
Field survey quadrat data - Exotic perennial grass invasion profiles differ between temperate threatened grassy communities
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Invasion promotes invasion: facilitation of C3 perennial grass dominance
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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.