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151 results for “global meta-analysis”
A global meta-analysis of tree plantations impacts on biodiversity
<p>By conducting a meta-analysis of 361 observations from 138 sites worldwide, we explored the global patterns and associated drivers of biodiversity responding to tree plantations by comparing biodiversity levels in plantations and its adjacent habitats.</p>
Phosphorus supply increases nitrogen transformation rates and retention in soil: a global meta-analysis
<p>Interactions between nitrogen (N) and phosphorus (P) are important for plant growth and ecosystem carbon (C) sequestration. While effects of N supply on P dynamics have been much studied, much less is known about the opposite (P-effect on N). We conducted a meta-analysis by compiling a total of 1734 individual experimental observations from 116 peer-reviewed publications to assess P-addition effects on soil N dynamics. Globally, P additions increased the soil total N (TN) pool, potentially as a result of enhanced plant and microbial immobilization and reduced N losses, with a stronger effect detected under longer duration of P addition (≥ 5 years). A coupled increase in soil organic C with TN signifies the fundamental role of exogenous P supply in enhancing soil C sequestration. Phosphorus addition accelerated some of the soil N cycling processes including gross N mineralization, gross nitrification, and denitrification, with the effect sizes varying among ecosystem types and increasing with P addition rates. Our results indicate the fundamental role of P in affecting soil N pools and processes, and highlight the efficacy of P supply in sequestering soil C and mitigating global C emission.</p>
Elevated CO2 alleviates adverse effects of drought on plant water relations and photosynthesis: a global meta-analysis
<p><span>1. </span><span>The elevated CO2 concentration (eCO2) is expected to improve plant water relations and carbon (C) uptakes, with a potential to mitigate drought stress. However, the interactive effects of eCO2 and drought on plant physiology and growth are not clear. </span></p> <p><span>2. </span><span>We performed a meta-analysis on the interactive effects of eCO2 and drought on plant water relations, photosynthesis, biomass production and allocation. </span></p> <p><span>3. </span><span>We found that eCO2 did not lead to conservation of soil water, but improved leaf water status under drought conditions as evidenced by a higher leaf relative water content and a less negative midday leaf water potential, resulting from reduced stomatal conductance (gs) and increased root to shoot ratio. Elevated CO2 retarded gs response to drought, which may be mediated by decreases in leaf abscisic acid concentration under eCO2 and drought. Drought imposed stomatal limitations on photosynthesis (A), which was alleviated by eCO2 via increasing intercellular CO2 concentration (Ci). This led to a stronger A response to eCO2 under drought, supporting the "low Ci effect". However, no interaction of eCO2 and drought was detected on plant biomass production. Intrinsic water use efficiency (iWUE) increased proportionally with eCO2, while plant-scale WUE was less responsive to eCO2 regardless of water availability. The advantages of eCO2 on C3 plants over C4 plants under well-watered conditions diminished under drought conditions. Within C3 plants, drought caused a greater reduction in biomass for woody plants than for herbs. Biomass declined progressively as drought prolonged for plants growing in both ambient CO2 and eCO2. The physiology and biomass of plants growing in pots showed more negative responses to drought than those growing in field. Biomass increase in free-air carbon dioxide enrichment experiments was significantly less than those in growth chamber and open top chamber experiments. </span></p> <p><span>4. </span><span>Synthesis</span><span>. These findings suggest that eCO2 can alleviate the adverse impacts of drought on plant water relations and C sequestration, and are of significance in the prediction of plant growth and ecosystem productivity under global changes.</span></p>
Divergent nitrogen and phosphorus allocation strategies in terrestrial plant leaves and fine roots: a global meta-analysis
<p><span>The quantification of the allocation of nitrogen (N) and phosphorus (P) among plant organs is essential to improve our understanding of plant growth, life-history strategies, and ecosystem nutrient and energy cycles. However, allocation strategies of N and P between terrestrial plant leaves and fine roots are unclear. </span></p> <p><span>Here, we compiled a global dataset comprising 807 terrestrial plant species to analyze the stoichiometric scaling of N and P between leaves and fine roots across species, families, plant groups, biomes, and locations. </span></p> <p><span>We found that N and P, and N:P ratios manifest different scaling exponents (α-values) between leaves and fine roots. Specifically, overall α<sub>N</sub> and α<sub>P</sub> were >1 </span><span>and </span><span><1</span><span>, respectively, and </span><span>α</span><span><sub>N</sub>:P</span><span> = 1, indicating a higher proportional increase of N to fine roots and P to leaves. However, there were differences in α<sub>N</sub>, α<sub>P</sub>, and α<sub>N:P</sub> among major species, families, plant groups, biomes, and locations. In addition, α<sub>N </sub>and α<sub>N</sub>:P increased with latitude; there was no clear trend for α<sub>P</sub>. Mean annual temperature accounted for the greatest proportion of variation in αN, whereas soil total P accounted for the greatest proportion of variation in α<sub>P</sub> and αN:P.</span></p> <p><span>Synthesis. Our results demonstrate a divergent N and P allocation strategy between leaves and fine roots in terrestrial plants. This study improves our understanding of the effects of the environment (including changes in global climate, and life history strategies) on nutrient allocation patterns between these two important plant organs.</span></p>
Tree germination sensitivity to increasing temperatures: a global meta-analysis across biomes, species and populations.
<p>The dataset contains the files used for the meta-analysis on the role of temperature increases on the germination of tree species from different biomes around the world.</p> <p>This meta-analysis is accepted for publication in Global Ecology and Biography (MS reference number: GEB-2024-0273.R1 ; Article DOI: 10.1111/geb.13921).</p> <p>Files S6 and S7 gather data of germination percentage and time, respectively, at population scale. File S5 is a summary of the publications used as data sources for the meta-analysis. The whole dataset comprises 50 papers addressing 63 species and 250 populations, it covers boreal, temperate, Mediterranean and tropical-subtropical biomes, and a time period between 1996 and 2024.</p>
Microbial necromass in cropland soils: A global meta-analysis of management effects
<p>The data support the article "Microbial necromass in cropland soils: A glogal meta-analysis of management effects" published in Global Change Biology.</p>
High temperature frequently increases facilitation between aquatic foundation species: A global meta-analysis of interaction experiments between angiosperms, seaweeds, and bivalves
<ol> <li><span>Many studies have quantified ecological impacts of individual foundation species (FS). However, emerging data suggest that FS often co-occur, potentially inhibiting or facilitating one another, thereby causing indirect, cascading effects on surrounding communities. Furthermore, global warming is accelerating, but little is known about how interactions between co-occurring FS vary with temperature. </span></li> <li><span>Shallow aquatic sedimentary systems are often dominated by three types of FS: slower-growing clonal angiosperms, faster-growing solitary seaweeds, and shell-forming filter- and deposit-feeding bivalves. Here, we tested the impacts of one FS on another by analyzing manipulative interaction experiments from 148 papers with a global meta-analysis.</span></li> <li> <span>We calculated </span><span>1,942 (non-independent) Hedges' <em>g</em> effect sizes,</span> <span>from 11,652 extracted values over performance responses, such as abundances, growths or survival of FS, and their associated standard deviations and replication levels. Standard aggregation procedures generated 511 independent Hedges' <em>g</em> that was classified into six types of reciprocal impacts between FS. </span> </li> <li><span>We found that (i) seaweeds had consistent negative impacts on angiosperms across performance responses, organismal sizes, experimental approaches, and ecosystem types; (ii) angiosperms and bivalves generally had positive impacts on each other (e.g., positive effects of angiosperms on bivalves were consistent across organismal sizes and experimental approaches, but angiosperm effects on bivalve growth and bivalve effect on angiosperm abundance were not significant); (iii) bivalves positively affected seaweeds (particularly on growth responses); (iv) there were generally no net effects of seaweeds on bivalves (except for positive effect on growth) or angiosperms on seaweeds (except for positive effect on 'other processes'); and (v) bivalve interactions with other FS were typically more positive at higher temperatures, but angiosperm-seaweed interactions were not moderated by temperature.</span></li> <li> <em><span>Synthesis</span></em><span>: Despite variations in experimental and spatiotemporal conditions, the stronger positive interactions at higher temperatures suggest that facilitation, particularly involving bivalves, may become more important in a future warmer world. Importantly, addressing research gaps, such as the scarcity of FS interaction experiments from tropical and freshwater systems and for less studied species, as well as testing for density-dependent effects, could better inform aquatic ecosystem conservation and restoration efforts and broaden our knowledge of FS interactions in the Anthropocene.</span> </li> </ol>
Downtown Diet: a global meta-analysis of urbanization on consumption patterns of vertebrate predators
<p>This dataset contains the summary of published studies included in the meta-analysis along with the R code to calculate within-study variation for those studies where this value was not reported. The .csv files with the calculated effect sizes for species richeness, evenness, carbon, and nitrogen stable isotopes are also included.</p>
Dataset for "Responses of Soil Greenhouse Gas Fluxes to Land Management in Forests and Grasslands : A Global Meta-analysis"
<p>This dataset archives the original data for the study "Responses of Soil Greenhouse Gases Fluxes to Land Management in Forests and Grasslands: A Global Meta-analysis".</p>
Data from: Global prevalence of chronic kidney disease: a systematic review and meta-analysis
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Trade-off between vegetation type, soil erosion control and surface water in global semi-arid regions: A meta-analysis
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Data from: Correlation of native and exotic species richness: a global meta-analysis finds no invasion paradox across scales
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Data from: Reptile responses to anthropogenic habitat modification: a global meta-analysis
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Data from: The impact of anthropogenic disturbances on the genetic diversity of terrestrial species: a global meta-analysis
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Data from: The importance of scattered trees for biodiversity conservation: a global meta-analysis
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Initial litter quality and climate regulate the negative effects of fauna exclusion on litter decomposition in terrestrial and aquatic ecosystems: A global meta-analysis of enclosure studies
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Data from: A meta-analysis reveals global patterns of sediment effects on marine biodiversity
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Data from: Trait-dependant tolerance of bats to urbanisation: a global meta-analysis
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Global meta-analysis of how marine upwelling affects herbivory
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A global meta-analysis of temperature effects on marine fishes’ digestion across trophic groups
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Allen Brain Atlas
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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.