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17 results for “Persistence Time”
Variation in the location and timing of experimental severing demonstrates that the persistent rhizome serves multiple functions in a clonal forest understory herb
<p>1. In clonal plants, persistent rhizomes can serve multiple purposes, including resource storage, modulation of heterogenous resource distributions, maintenance of bud banks and promotion of recovery from disturbance. Clonal plants are commonly long-lived and, in temperate zones, often exhibit organ preformation. Thus, investigations of how the timing of disturbance to the rhizome affects plant performance must occur over multiple growing seasons, but these types of studies are rare.</p> <p>2. We conducted a field experiment to examine how the persistent rhizome supports the existing shoot, new ramet production, and recovery from damage using mayapple (<i>Podophyllum peltatum</i>; Berberidaceae), a common herbaceous perennial of low-light forest understories in Eastern North America. Mayapple maintains a long-lived rhizome and exhibits a developmentally-programmed seasonal pattern of resource transport and new ramet initiation. We varied both the position and timing of rhizome severing in rhizome systems with terminal sexual or vegetative shoots, and tracked plants for two years following severing.</p> <p>3. The location and timing of severing affected both plant persistence (production of new shoots) and performance (leaf area), with effects differing for new shoots at the front vs. the back of the rhizome system. Across years, severing location and past years' shoot size influenced plant persistence and performance, while the effect of timing of severing diminished; initial sexual status had little effect on rhizome system response that was not accounted for by initial leaf area. Severing generally led to the establishment of two independent rhizome systems. Relative to unmanipulated control systems, these two systems had more total leaf area, but less average leaf area per system.</p> <p>4. Synthesis. Our results point to the rhizome as a resource integrator that affects plant responses to disturbance immediately following damage and in subsequent growing seasons. Rhizome bud age and/or subtending rhizome size, and developmental program influence responses to disturbance. While the effects of experimental disturbance on plant performance decreased two years after disturbance, further long-term investigation is needed to fully understand the demographic consequences of damage to persistent rhizomes. </p>
Forestation at the right time with the right species can generate persistent carbon benefits in China
<p>This collection contains the datasets used in our study ‘<strong>Forestation at the right time with the right species can generate persistent carbon benefits in China</strong>’.</p> <p><em><strong>Part A: Data</strong></em></p> <p>Most of the data presented here are after pre-processing, such as transforming the projection, extracting variables, clipping to the study region (70<sup>o</sup>E-140<sup>o</sup>E,15<sup>o</sup>N-55<sup>o</sup>N), and resampling to 1-km.</p> <p>The original source of these data sets (usually global, at different resolutions) is given in 'data_original.txt' as well as in the 'Data availability' of the main text.</p> <p>1. potential_china_forest_1km.rar: contains the potential forest distributions for China at 1-km resolution from multiple source (Random Forest, WRI and ORCHIDEE). Note: the forest distribution is in the form of logical variables in the .mat file, where a value of 1 or true means that the grid point is potentially forestable, and a value of 0 or false means this grid is not suitable for forest.</p> <p>2. ori_carbon_all_grid_1km.mat: Living biomass carbon densities in 2010 for China at 1-km (unit: Mg C ha-1). Both aboveground and belowground biomass carbon are included. The original biomass map is from Spawn et al. 2020.</p> <p>3. Forest_inventory_data_5th_9th.xlsx: 1) The forest area reported in 5th to 9th national forest inventory 2) The forest area of different age classes derived form the 9th national forest inventory.</p> <p>4. data_original.txt: the original source of these data sets</p> <p><strong>Part B: MATLAB Code</strong></p> <p>This file (Matlab_code.rar) contains the code, functions and parameters for our analysis of the data, mainly MATLAB files (.m or mat)</p> <p><strong>Part C: Demo/Example data and code</strong></p> <p>This file (Demo.rar) contains the demo of our code running, which includes the demo code along with code comments, input data for the demo, and the expected output results.</p> <p><strong>Part D: Docs</strong></p> <p>Reference and guidelines (Docs.rar).</p> <p>If you have any questions or suggestions, please contact xuhaotony@pku.edu.cn</p>
Variation in the location and timing of experimental severing demonstrates that the persistent rhizome serves multiple functions in a clonal forest understory herb
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Data and analysis code of "Forestation at the right time with the right species can generate persistent carbon benefits in China"
<p>This collection contains the datasets used in our study ‘<strong><em>Forestation at the right time with the right species can generate persistent carbon benefits in China</em></strong>’.</p> <p> </p> <p><strong><em>Part A: Data</em></strong></p> <p>Most of the data presented here are after pre-processing, such as transforming the projection, extracting variables, clipping to the study region (70<sup>o</sup>E-140<sup>o</sup>E,15<sup>o</sup>N-55<sup>o</sup>N), and resampling to 1-km.</p> <p>The original source of these data sets (usually global, at different resolutions) is given in 'data_original.txt' as well as in the 'Data availability' of the main text.</p> <p>1. Climate_china_1km.7z: This compressed file contains the annual precipitation and temperature from Peng et al. 2019 at 1km.</p> <p>2. Soil_china_1km.7z: This compressed file contains the soil properties derived from Soilgrid250m for China at 1-km resolution.</p> <p>3. Topography_china_1km.7z: This compressed file contains the topographic properties derived from Global Multi-resolution Terrain Elevation Data 2010 for China at 1-km resolution.</p> <p>4. MaxEnt_process.7z: This compressed file contains all the input data and model results of the MaxEnt model: 1) environment layers in ’.asc’, 2) rarefied occurrence points for the 15 forest types, 3) MaxEnt results in ’.tif’ (average of the 10-folds results)</p> <p>5. Potential_china_forest_1km.7z: contains the potential forest distributions for China at 1-km resolution from multiple source (Random Forest, WRI and ORCHIDEE). Note: the forest distribution is in the form of logical variables in the .mat file, where a value of 1 or true means that the grid point is potentially forestable, and a value of 0 or false means this grid is not suitable for forest.</p> <p>6. Existing_china_forest_1km.7z: contains the existing forest distributions for China at 1-km resolution from multiple source (FI2013-2017, Hansen, MODIS, ESA-CCI, CNLUCC, GLC-FCS30 and GlobeLand30). Note: the existing forest distribution is in the form of logical variables in the .mat file, where a value of 1 or true means there is forest distribution, and a value of 0 or false means there is currently no forest distribution.</p> <p>7. Crop_urban_china_1km.7z: similar to the Existing_china_forest_1km.zip, but stores the distribution of cropland and urban.</p> <p>8. Masks_area_china_1km.7z: area mask and the shp files of the national and provincial boundaries of China.</p> <p>9. CMIP6_outputs.7z: contains historical (1970-2014) and future (2015-2100) climate and CO2 fertilization factor simulated by Earth System Models participating in CMIP6.</p> <p>10. Ori_carbon_all_grid_1km.mat: Living biomass carbon densities in 2010 for China at 1-km (unit: Mg C ha<sup>-1</sup>). Both aboveground and belowground biomass carbon values are included. The original biomass map is from Spawn et al. 2020.</p> <p>11. Forest_inventory_data_5th_9th.xlsx: 1) The forest area reported in 5th to 9th national forest inventory 2) The forest area of different age classes derived from the 9th national forest inventory.</p> <p>12. Forest_age_CN2019.7z: the forest stand age map for China updated to 2019.</p> <p>13. data_original.txt: the original source of these data sets</p> <p><strong>Part B: MATLAB Code</strong></p> <p>This file (Matlab_code.7z) contains the code, functions and parameters for our analysis of the data, mainly MATLAB files (.m or mat)</p> <p><strong>Part C: Demo/Example data and code</strong></p> <p>This file (Demo.7z) contains the demo of our code running, which includes the demo code along with code comments, input data for the demo, and the expected output results.</p> <p><strong>Part D: Docs</strong></p> <p>Reference and guidelines (Docs.7z).</p> <p>If you have any questions or suggestions, please contact xuhaotony@pku.edu.cn</p>
Time-Restricted Eating to Address Persistent Cancer-Related Fatigue
ClinicalTrials.gov study NCT05256888. IPD Sharing: Not stated. Countries: 1. Publications: 1.
Sexual signals persist over deep time: ancient co-option of bioluminescence for courtship displays in cypridinid ostracods
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Data from: Persistent near real-time passive acoustic monitoring for baleen whales from a moored buoy: system description and evaluation
1. Managing interactions between human activities and marine mammals often relies on an understanding of the real-time distribution or occurrence of animals. Visual surveys typically cannot provide persistent monitoring because of expense and weather limitations, and while passive acoustic recorders can monitor continuously, the data they collect are often not accessible until the recorder is recovered. 2. We have developed a moored passive acoustic monitoring system that provides near real-time occurrence estimates for humpback, sei, fin, and North Atlantic right whales from a single site for a year, and makes those occurrence estimates available via a publicly accessible website, email and text messages, a smartphone/tablet app, and the U.S. Coast Guard's maritime domain awareness software. We evaluated this system using a buoy deployed off the coast of Massachusetts during 2015-2016 and redeployed again during 2016-2017. Near real-time estimates of whale occurrence were compared to simultaneously collected archived audio as well as whale sightings collected near the buoy by aerial surveys. 3. False detection rates for right, humpback, and sei whales were 0% and nearly 0% for fin whales, while missed detection rates at daily time scales were modest (12-42%). Missed detections were significantly associated with low calling rates for all species. We observed strong associations between right whale visual sightings and near real-time acoustic detections over a monitoring range of 30-40 km and temporal scales of 24-48 hours, suggesting that silent animals were not especially problematic for estimating occurrence of right whales in the study area. There was no association between acoustic detections and visual sightings of humpback whales. 4. The moored buoy has been used to reduce the risk of ship strikes for right whales in a U.S. Coast Guard gunnery range, and can be applied to other mitigation applications.
Real-Time Support for Exercise Persistence in COPD
ClinicalTrials.gov study NCT00373932. IPD Sharing: Not stated. Countries: 1. Publications: 2.
Optimal Timing of Dronedarone Initiation After Conversion in Patients With Persistent Atrial Fibrillation
ClinicalTrials.gov study NCT01140581. IPD Sharing: Not stated. Countries: 16. Publications: 1.
Pharmacokinetics and Optimal Timing of Dronedarone Initiation Following Long-term Amiodarone in Patients With Paroxysmal or Persistent Atrial Fibrillation
ClinicalTrials.gov study NCT01199081. IPD Sharing: Not stated. Countries: 7. Publications: 1.
Data from: Persistent near real-time passive acoustic monitoring for baleen whales from a moored buoy: system description and evaluation
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Plant-pollinator interactions between generalists persist over time and space
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Exposure time during postembryonic development influences persistent biological effects of the insecticide carbaryl in green frogs (Lithobates clamitans)
GEO Series GSE42338. Xenopus laevis; Aquarana catesbeiana; Lithobates clamitans; Lithobates pipiens. 11 samples. Type: Expression profiling by array.
Study of Drug Acceptance and Its Persistence Over Time in Patients Receiving a Haematopoietic Stem Cell Allograft
ClinicalTrials.gov study NCT05164835. IPD Sharing: NO. Countries: 1. Publications: 0.
Persistence of Physical Activity in People With Type 2 Diabetes Over Time.
ClinicalTrials.gov study NCT05661799. IPD Sharing: NO. Countries: 1. Publications: 0.
Plasmodium falciparum increased time in circulation underlies persistent asymptomatic infection in the dry season
GEO Series GSE148125. Plasmodium falciparum. 24 samples. Type: Expression profiling by high throughput sequencing.
Gene expression of CD4+ T cells in response to antigen persisting at different doses for different times
GEO Series GSE143733. Mus musculus. 43 samples. Type: Expression profiling by array.
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