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907 results for “Pine”
Reforestation of high elevation pines: Direct seeding success depends on seed source and sowing environment
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Data from: Pyrophilic plants respond to post-fire soil conditions in a frequently burned longleaf pine savanna
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Data for: Hardwoods influence effect of climate and intraspecific competition on growth of woodland longleaf pine trees
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Pest defenses under weak selection exert a limited influence on the evolution of height growth and drought avoidance in marginal pine populations
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Genetic architecture underlying response to the fungal pathogen Dothistroma septosporum in lodgepole pine, jack pine, and their hybrids
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Data from: A sex chromosome polymorphism maintains divergent plumage phenotypes between extensively hybridizing yellowhammers (Emberiza citrinella) and pine buntings (E. leucocephalos)
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Within and between population comparisons suggest independently acting selection maintaining parallel clines in Scots pine (Pinus sylvestris)
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Climate change may make pine wilt disease more prevalent
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Disentangling fragmentation effects on herbivory in understory plants of longleaf pine savanna
Habitat fragmentation affects species and their interactions through intertwined mechanisms that include changes to fragment area, shape, connectivity and distance to edge. Disentangling these pathways is a fundamental challenge of landscape ecology and will help identify ecological processes important for management of rare species or restoration of fragmented habitats. In a landscape experiment that manipulated connectivity, fragment shape, and distance to edge while holding fragment area constant, we examined how fragmentation impacts herbivory and growth of nine plant species in longleaf pine savanna. Probability of herbivory in open habitat was strongly dependent on proximity to forest edge for every species, increasing with distance to edge in six species (primarily grasses and annual forbs) and decreasing in three species (perennial forbs and a shrub). In the two species of perennial forbs, these edge effects were dependent on fragment shape; herbivory strongly decreased with distance to edge in fragments of two shapes, but not in a third shape. For most species, however, probability of herbivory was unrelated to connectivity or fragment shape. Growth was generally determined more strongly by leaf herbivory than by distance to edge, fragment shape, or connectivity. Taken together, these results demonstrate consistently strong edge effects on herbivory, one of the most important biotic factors determining plant growth and demography. Our results contrast with the generally inconsistent results of observational studies, likely because our experimental approach enabled us to tease apart landscape processes that are typically confounded.
Florida Longleaf Pine Surveys of Density and Growth Rates
The longleaf pine (Pinus palustris) ecosystem is an endangered global biodiversity hotspot that is a major focus of conservation and restoration efforts. However, most studies of longleaf habitats have not considered their distinct diversity, structure, and function among different communities, which are critical for developing appropriate management strategies. Florida has 51% of the remaining habitat, where it occurs in 5 unique community types. This dataset was collected from 82 plots (160 m2 each) in 23 sites across all 5 community types. We used modified variable area transects to collect data on tree density and growth rates. Tree rings were measured to the nearest 0.001 mm in CooRecorder and crossdated visually and statistically verified in COFECHA. Data was collected by N.Z. in 2018 while in graduate school at Florida State University.
Water budget components and forest structure in burned and unburned longleaf pine stands, the Jones Center at Ichauway, Southwest Georgia, USA, 2015 - 2021
This data package includes data tables used to assemble a stand-level water budget of the longleaf pine-wiregrass ecosystem in southwestern Georgia, USA, between 2015 and 2021. Water budgets were estimated by measuring or modeling each distinct water budget component. Thus, the data tables included in the package are generally divided by stratum (i.e. overstory, midstory, vegetative groundcover, litter layer) and/or process (i.e. evaporation or transpiration). Relevant forest structure data is also included; they are often presented in tables alongside estimates of transpiration. Much of the data were collected across a soil moisture gradient, at both mesic and xeric sites, and in stands treated with different fire regimes: frequent prescribed fire (FF) or fire exclusion (EX). For some data, site or treatment may not be specified if the data were not collected for comparative purposes, but rather as representative baseline data for models that would be applied across sites and treatments. Transpiration data contained within this package include: 1) seasonal averages of daily sap-flux for pines and oaks measured with thermal dissipation probes 2) daily and seasonal transpiration for individual trees 3) seasonal transpiration for functional groups of shrubs and small trees 4) seasonal transpiration of groundcover functional groups Evaporation data contained within this package include: 1) Continuously-measured canopy interception and throughfall 2) overstory stemflow 3) midstory stemflow 3) groundcover interception and throughfall 4) litter moisture content data paired with time since rain (to develop litter drying curves), and 5) litter moisture content data paired with recent rain event depth (to develop litter wetting curves) Forest structure data contained within this package include: 1) Annual measures of tree DBH 2) Biannual estimates of small tree and shrub DBH, by functional group 3) Monthly estimates of groundcover functional group leaf area index 4) Monthly
Experimentally evaluating effects of postfire drought on establishment, growth and survival of two widespread western conifer species; lodgepole pine and Douglas-fir
This research seeks to understand how drought following wildfires affects the establishment of two widespread Rocky Mountain tree species, lodgepole pine and Douglas-fir. In Yellowstone National Park, warming, drying conditions are leading to increased frequency of severe wildfires that kill existing trees and trigger regeneration of the forest. These trends are expected to continue. Many tree species in Yellowstone are well adapted to fire. Yet, early and abundant seedling establishment after fire is critical for forests to recover. Tree seedlings are particularly sensitive to drought, and evidence suggests that sufficiently dry postfire conditions could cause widespread tree-seedling mortality, with ecological consequences that may last decades. This research will determine how seedlings from two tree species respond to drought conditions expected in the mid-21st century and will identify the physiological mechanisms that drive seedling response to dry conditions. The results of this study will advance understanding of how forests in the western United States will respond to environmental change over coming decades and provide useful information for western land managers who are grappling with increased wildfires.
Experimentally evaluating effects of postfire drought on establishment, growth and survival of two widespread western conifer species; lodgepole pine and Douglas-fir (greenhouse portion of experiment)
This research seeks to understand how drought following wildfires affects the establishment of two widespread Rocky Mountain tree species, lodgepole pine and Douglas-fir. In Yellowstone National Park, warming, drying conditions are leading to increased frequency of severe wildfires that kill existing trees and trigger regeneration of the forest. These trends are expected to continue. Many tree species in Yellowstone are well adapted to fire. Yet, early and abundant seedling establishment after fire is critical for forests to recover. Tree seedlings are particularly sensitive to drought, and evidence suggests that sufficiently dry postfire conditions could cause widespread tree-seedling mortality, with ecological consequences that may last decades. This research will determine how seedlings from two tree species respond to drought conditions expected in the mid-21st century and will identify the physiological mechanisms that drive seedling response to dry conditions. The results of this study will advance understanding of how forests in the western United States will respond to environmental change over coming decades and provide useful information for western land managers who are grappling with increased wildfires.
Survival and growth of south Florida slash pines in four seasonal ponds at Archbold Biological Station, 1992-2001
These data summarize survival and plant size (height, basal diameter) for south Florida slash pine (Pinus elliottii var. densa) in four seasonal ponds at Archbold Biological Station from 1992-2001. Plants were seedlings, saplings, or small trees. The seasonal ponds were favorable for growth (0.1-0.6 m in height per year) and annual survival (usually over 80%) in the absence of fire or major flooding events. Flooding episodes during most of the study ranged from 3-11 months each year. Mortality increased with flooding intensity and decreased with plant size. Growth rates were not affected by flooding. Near the end of the study, two fires killed 72% of these pines (low intensity, prescribed) and 100% of these pines (intense wildfire). The study suggests that most seasonal ponds do not support large south Florida slash pine individuals despite generally favorable conditions, because of periodic flooding and fire.
Bulk throughfall at Coweeta White Pine, Watershed One at the Coweeta Hydrologic Laboratory from 1985 to 1988
None provided by researcher.
Bulk stemflow at Coweeta White Pines, Watershed One (Coweeta Hydrologic Laboratory) from 1985 to 1988
Data was collected from six collectors. Statistical means were volume weighted.
Tree Ring Widths for Loblolly Pine in the Eastern Shore of Virginia National Wildlife Refuge
Width of tree rings were measured on 25 Loblolly Pine trees in the Eastern Shore of Virginia National Wildlife refuge (37.125153-deg N, 75.965134-deg W.) to the nearest 0.001 mm.
Pine & Lafferty (1982) C2H6 spectral data
<p>C2H6 spectral data from: Pine, A.S & Lafferty, W.J.,<br> "Torsional Splittings and Assignments of the Doppler-Limited<br> Spectrum of Ethane in the C-H Stretching Region",<br> Journal of Research of the National Bureau of Standards, Vol. 87. No. 3, May-June, 1982.</p> <p>These data were available only under the form of a table in the PDF copy of the original paper. The data have been read and transcripted to a single ASCII text file by the authors of Cours, T., Cordier, D., Seignovert, B., Maltagliati, L., Biennier, L., "The 3.4 um absorption of the Titan's stratosphere: contribution of ethane, propane, butane and complex hydrogenated", 2020, Icarus, 339, 113571. DOI: <a href="http://doi.org/10.1016/j.icarus.2019.113571">10.1016/j.icarus.2019.113571</a>. These spectral lines are now much more usable (at least for comparison purpose) by researchers.</p>
Post-release movement and habitat selection of translocated pine martens Martes martes
Monitoring post-release establishment and movement of animals is important in evaluating conservation translocations. We translocated 39 wild pine martens Martes martes (19 females, 20 males) from Scotland to Wales. We released them into forested areas with no conspecifics in 2015, followed by a second release in 2016, alongside the previously released animals. We used radio-tracking to describe post-release movement and habitat selection. Six martens (15%) were not re-encountered during the tracking period, of which four undertook long-distance dispersal. For the remaining individuals, we characterised two phases of movement, 'exploration' followed by 'settlement', that differed between releases. In the first release, martens remained in exploration phase for a mean of 14.5 days (SE=3.9 days) and settled at a mean distance of 8.7km (SE=1.8km) from release sites, whereas martens released in year two, alongside resident conspecifics, travelled away from release sites at a faster rate, settling sooner, at a mean of 6.6 days (SE=1.8 days), but further, at a mean distance of 14.0km (SE=1.7km) from release sites. Animals released in year one did not exhibit habitat preferences overall but within forests they favoured recently-felled areas, whereas animals released in year two showed strong selection for forested habitat but did not discriminate between forest types. The presence of conspecifics appeared influential for settlement and site fidelity of translocated martens and was associated with more rapid but more distant dispersal of the later cohort. Releases of animals in close proximity appeared to promote site fidelity and rapid establishment of ranges in the recipient environment.
Data from: Contrasting species decline but high sensitivity to increasing water stress on a mixed pine-oak ecotone
<p>1. Forest decline under environmental stress is expressed by regeneration failure and accelerated mortality in all ontogenic stages at the population level. Characterizing functional traits and mechanisms that best capture species decline and mortality is essential to assess forest dynamics. 2. We analyzed sensitivity to increasing water stress in two species with different water-use strategies on a mixed Quercus pyrenaica - Pinus sylvestris forest where adult pines express vulnerability to climate change but oaks do not. We compared dynamics of radial growth, wood δ13C and sapwood nonstructural carbohydrates (NSC) in response to drought at different time scales in both species and two age-cohorts in pine. 3. Both species were very sensitive to water stress, which influenced trait phenotypic plasticity at short- and long-time scales. Water-use strategy in pines of both ages was more conservative than in the more drought-tolerant oak. Both species showed negative growth trends despite increasing iWUE. Recent growth of pines is slower than it was in the past. Carbon isotope discrimination trends in young pines suggested increasing leaf gas exchange constraints. NSC were far from depletion in both species and all pine ages. Intra- and inter-annual NSC variability was higher in oaks than in pines and in soluble sugars (SS) than in starch. SS were lowest in young pines. Sensitivity of NSC to contrasting climatic years was low in pines, which NSC mostly remained homeostatic. The sensitivity to climate expressed suggests different C-allocation strategies, with less coupling between radial growth and current year photosynthesis in young pines. 4. Synthesis. Pines expressed negative responses to increased water stress regardless of age, showing rising gas-exchange constraints through tighter stomatal control of water losses than oaks. Young pines showed similar functional responses to water stress than old pines in decline, which suggests species-level vulnerability and could be regarded as early-warning signals anticipating mortality in pines. Yet, given the high sensitivity to drought also expressed by the non-declining oak, it would have been difficult to unequivocally disentangle species decline based only on the traits analysed.</p>
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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
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