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184 results for “Redistribution”
Resource redistribution mediated by hydrological connectivity modulates vegetation response to aridification in drylands
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Data from: Fate of atmospherically deposited NH4+ and NO3- in two temperate forests in China: temporal pattern and redistribution
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Data From: Emissions redistribution and environmental justice implications of California's Clean Vehicle Rebate Project
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Data from: Land-use change interacts with climate to determine elevational species redistribution
Climate change is driving global species redistribution with profound social and economic impacts. However, species movement is largely constrained by habitat availability and connectivity, of which the interaction effects with climate change remain largely unknown. Here we examine published data on 2798 elevational range shifts from 43 study sites to assess the confounding effect of land-use change on climate-driven species redistribution. We show that baseline forest cover and recent forest cover change are critical predictors in determining the magnitude of elevational range shifts. Forest loss positively interacts with baseline temperature conditions, such that forest loss in warmer regions tends to accelerate species' upslope movement. Consequently, not only climate but also habitat loss stressors and, importantly, their synergistic effects matter in forecasting species elevational redistribution, especially in the tropics where both stressors will increase the risk of net lowland biotic attrition.
Species redistribution combined with invasive dominance but not species turnover promotes biotic homogenization following invasion
<p>Disentangling the processes lead to biotic homogenization is important and will guide conservation efforts. Temporal turnover in species composition (i.e., β-diversity) and changes in local α-diversity are two distinct processes drive biotic homogenization, but these effects may be masked by invasive dominance. After removing invasive dominance, we compared the changes in species diversity and species distribution patterns before and after invasion aims to measure the relative contribution of species turnover and local diversity changes to biological homogenization. Invasive dominance indeed had an important contribution to biotic homogenization, and the effects increased with an increase in the invasive species number. Species composition of native plots was not significantly different from invaded plots when removing invasive species. Invasion changed native species distribution patterns and promoted the wide spread of most species, which causes an increase in local richness and community evenness. We highlight that species redistribution combined with invasive dominance but not species turnover promotes biotic homogenization, especially at early invasion stages. Avoiding the ecological impacts of biotic homogenization following invasion will require much stronger proactive management to prevent invasive dominance as well as increase monitoring at the early stages of invasion.</p>
Nitrogen redistribution and seasonal trait fluctuation facilitate plant N conservation and ecosystem N retention
<ol> <li><span>Low available soil nitrogen (N) limits plant productivity in alpine regions, and alpine plants thus resorb and reallocate N from senescing tissues to conserve this limited N during the nongrowing season. However, the destination and extent of N redistribution during plant senescence among above- and below-ground organs, let alone other processes of translocation outside of plants and into the soil components, remain poorly understood. </span></li> <li><span>Utilizing the <sup>15</sup>N stable isotope as a tracer, we quantified N redistribution among above- and below-ground plant organs and different soil components during senescence in an alpine meadow ecosystem, and explored the relationship between <sup>15</sup>N among plant-soil N pools with seasonal fluctuations of plant functional traits.</span></li> <li><span>We found a substantial depletion of <sup>15</sup>N in fine roots (-40% ± 2.8%) and aboveground tissues (-51% ± 5.1%), and an enhanced <sup>15</sup>N storage primarily in coarse roots (+79% ± 27%) and soil organic matter (+37% ± 10%) during plant senescence. In parallel, we observed a temporal variation in plant functional traits, representing a shift from more acquisitive to more conservative strategies as the growing season ends, such as higher coarse root N and coarse root to fine root ratio. The seasonal trait variations were highly correlated with the <sup>15</sup>N retention in coarse roots and soil organic matter. Particularly, <sup>15</sup>N retention in particulate and mineral-associated organic matter increased by 30% ± 12% and 24% ± 9%, respectively, suggesting a potential pathway through which fine root and microbial mortality contribute to <sup>15</sup>N redistribution into soil N pools during senescence.</span></li> <li> <span><em>Synthesis</em>. </span><span>N redistribution and seasonal plant trait fluctuation facilitate plant N conservation and ecosystem N retention in the alpine system. This study suggests a coupled aboveground-belowground N conserving strategy that may optimize the temporal coupling between plant N demand and ecosystem N supply in N-limited alpine ecosystems. </span> </li> </ol>
Disturbance-related redistribution of Western capercaillie (Tetrao urogallus) away from woodland tracks
<p>Wild vertebrates usually avoid ground disturbed by humans with uncertain effects on their distribution and density. We report on a natural experiment that confirms and extends previous conclusions about how the local distribution of capercaillie is affected by track-based disturbance. We surveyed the birds' droppings in two periods, before and after a predicted increase in disturbance adjacent to an expanding Scottish village, and model the probability of finding droppings in relation to period plus two disturbance gradients – distance to a much disturbed 'entry zone' with a high density of tracks lying adjacent to the village, plus distance to the nearest track. Throughout the study, no droppings were found within the entry zone and their density was depressed up to 400 m from it. Density of droppings was also depressed within 100–120 m of tracks but, compared to a notional scenario without tracks, was threefold greater on ground 120–250 m from tracks. Although the number of cocks counted at the lek in spring showed a small increase, there was an almost threefold decline in the probability of finding capercaillie droppings on and within about 40 m of tracks. We infer that, after the development, birds were less likely to use or cross tracks in pursuit of their daily living requirements, with unknown consequences for their population dynamics and vital rates. Our results have implications for refuge design. Birds on roughly half of a 50 ha refuge should be undisturbed by direct effects of track-based activities. However, birds shifting away from tracks may themselves cause local increases in density and associated, indirect disturbance such that a refuge would need to be over 300 ha <sup> </sup>to keep half of it undisturbed.</p>
The Effect of Ground Ice Redistribution on the Martian Paleo-CO2 Cycle, David et al. 2024
<p>Dataset to produce plots for JGR paper "The Effect of Ground Ice Redistribution on the Martian Paleo-CO2 Cycle"</p> <p>1. Figure 2: "Ground ice distributions – MONS & modern MSIM" was produced using "icetable_gcm_GCM1182.mat" (ice table for Eq. case), "depth_static_H2OonMinDist_230723.mat" (ice table for MONS case), "InfH2OonCaps_grid_220623.mat" (perennial water ice cap distribution), "depth_data.mat" (depth vector) and "dimension_vars.mat" (different dimension vectors: Ls, Time, Longitude, Latitude, etc.).</p> <p>2. Figure 3: "Pressure with MONS, modern MSIM ground ice and Viking" was produced using "gcm1116_xpsol125.mat" (pressure with MONS GI, default TI case), "gcm1115_xpsol125.mat" (pressure with MONS GI, high TI case) "gcm1184_xpsol140.mat" (pressure with Eq. GI, default TI case), "gcm1182_xpsol140.mat" (pressure with Eq. GI, high TI case), "VL1_lmd.txt" (VL1 pressure) & "dimension_vars.mat".</p> <p>3. Figures 4-9: "Seasonal caps & GI areas at different obliquities", "Full grid maps of CO2 mass & time at obliquity 25", "Full grid maps of CO2 mass & time at obliquity 45", "CO2 ice and surface temperature at a low TI regions", " Surface pressure at different obliquities" and "Surface temperature at obliquities 25 and 45" were produced using "dimension_vars.mat", "co2_GCM1117-1121.mat" (CO2 from GCM simulations with Eq. GI, e = 0, obliquity = 25, 30, 35, 40, 45 respectively), "icetable_gcm_GCM1117-1121.mat" (Eq. GI ice table), "co2_GCM1050-1054.mat" (CO2 from GCM simulations with MONS GI, e = 0, obliquity = 25, 30, 35, 40, 45 respectively) and "depth_static_H2OonMinDist_230723.mat".</p> <p>4. Figures 10-12: "Contours of northern seasonal cap as function of orbital parameters", "Contours of southern seasonal cap as function of orbital parameters" and "Interpolation of surface pressure for past 20 MA" were produced using "CO2_Orbit_e0-012_eq/st.mat" (CO2 mass and pressure for e = 0, 0.04, 0.08, 0.12; Eq./MONS GI cases, respectively).</p> <p>5. Figure SM 1: "CO2 mass as a function of MSIM-GCM iteration" was produced using "run1050-1054.nc", "run1117-1021.nc", "run1185-1189.nc" (MONS/Eq. 1/Eq. 2 full GCM results for e = 0, obliquity = 25, 30, 35, 40, 45, respectively).</p>
Intergroup cooperation in the lab: asymmetric power relations and redistributive policies
<p>Dataset and analysis script to recreate the figures and tables for the paper.</p>
Safety and Efficacy Study of Serostim® Human Immunodeficiency Virus-Associated Adipose Redistribution Syndrome
ClinicalTrials.gov study NCT01077960. IPD Sharing: Not stated. Countries: 2. Publications: 1.
Disturbance-related redistribution of Western capercaillie (Tetrao urogallus) away from woodland tracks
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Species redistribution combined with invasive dominance but not species turnover promotes biotic homogenization following invasion
Open the record for dataset details and reuse information.
Nitrogen redistribution and seasonal trait fluctuation facilitate plant N conservation and ecosystem N retention
Open the record for dataset details and reuse information.
Data from: Land-use change interacts with climate to determine elevational species redistribution
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Data from: Anticipating arrival: tackling the national challenges associated with the redistribution of biodiversity driven by climate change
1. The redistribution of species in response to climate change is expected to significantly challenge environmental management and conservation efforts around the globe. To date, we have had restricted understanding of the benefits and risks that species redistribution may pose to individual countries, and a limited appreciation of the variability in current opportunities for developing effective monitoring approaches that build on existing national frameworks. 2. To assess the present level of ecological, economical and societal risks and opportunities associated with new arrivals driven by changes in climatic conditions, we conducted a review of the available information on climate driven changes in animal species (both terrestrial and marine) composition and distribution in the United Kingdom over the past ten years (2008-2018). 3. We found evidence that at least 55 species have colonised new locations in the country due to climate change in past decade, with 22 of them suspected to impact positively or negatively the receiving ecosystems and/or nearby human communities. Ten of these 55 species were identified thanks to social media. 4. Synthesis and applications. Our work identifies pressing monitoring gaps relevant to the management of species on the move and discusses the potential for social media to help address current information needs. It also calls for more theoretical work to enable the quick identification of species likely to be problematic (or beneficial) and locations likely to experience significant ecological and societal impacts from biodiversity's redistribution under a changing climate.
Water potential gradient, root conduit size and root xylem hydraulic conductivity determine the extent of hydraulic redistribution in temperate trees
1. Hydraulic redistribution (HR) of soil water through plant roots is widely described, however its extent, especially in temperate trees, remains unclear. Here, we quantified redistributed water of five temperate tree species. We hypothesized that both, HR within a plant and into the soil increases with higher water-potential gradients, larger root conduit diameters and root-xylem hydraulic conductivities. 2. Saplings of conifer (<i>Picea abies</i>, <i>Pseudotsuga menziesii</i>), diffuse-porous (<i>Acer pseudoplatanus</i>) and ring-porous species (<i>Castanea sativa</i>, <i>Quercus robur</i>) were planted in split-root systems, where one plant had its roots split between two pots with different water-potential gradients (0.23 to 4.20 MPa). Hydraulic redistribution was quantified via deuterium labeling. 3. On average, species redistributed 0.39 ± 0.14 ml water overnight (0.08 ± 0.01 ml g<sup>-1</sup> root mass). Higher pre-dawn water-potential gradients, xylem hydraulic conductivities and larger conduit diameters significantly increased HR. Hydraulic conductivity had the greatest influence on HR, within the plants (0.03 ± 0.01 ml g<sup>-1</sup>) and into the soil (0.06 ± 0.01 ml g<sup>-1</sup>). 4. Additional factors as soil-root contact should be considered, especially when calculating water transfer into the soil. Nevertheless, trees maintaining high xylem hydraulic conductivity showed higher HR amounts, potentially making them valuable 'silvicultural tools' to improve plant water-status.
Replication Package for Immigration and Redistribution
<p>Replication package for Immigration and Redistribution, MS27453.</p> <p>The replication package contains all the data--survey data and actual statistics on immigrants and non-immigrants--and scripts to replicate all the tables and figures in the paper. It also includes three files that explain how we computed the statistics and the sources we used. </p>
Replication Package for: Welfare and Redistribution in Residential Electricity Markets with Solar Power
<p>The Stata Do-Files, Matlab Scripts and Functions in this folder can be used to replicate the tables and graphs of the paper "Welfare and Redistribution in Residential Electricity Markets with Solar Power" by Fabian Feger, Nicola Pavanini, and Doina Radulescu.</p>
Replication Package for Immigration and Redistribution
<p>Replication package for Immigration and Redistribution by Alberto Alesina, Armando Miano, and Stefanie Stantcheva.</p> <p>The package contains all the survey data and the data on actual statistics about immigrants and non-immigrants, as well as the scripts needed to replicate the figures and tables in the paper. The package also contains three excel files detailing how we computed the actual statistics and the sources we used.</p>
"Solar Polar Flux Redistribution based on Observed Coronal Holes" Data
<p>These tarballs contains all the input and output data used to generate all the analysis and figures in the paper "Solar Polar Flux Redistribution based on Observed Coronal Holes" submitted to <a href="https://iopscience.iop.org/journal/0004-637X">The Astrophysical Journal</a>. More details about the files included in this archive are included in the ReadMe.</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
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.