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1,200 results for “Meta analysis”
Data obtained by systematic review (codified data and meta-data) for: Influence of upwelling on coral reef benthic communities: a systematic review and meta-analysis
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Interactive effects of elevated temperature and drought on plant carbon metabolism: A meta‐analysis
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A meta-analysis of biological impacts of artificial light at night
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Code from: The role of intrinsic factors in explaining range shifts of European breeding birds: A meta-analysis
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Data from: Fire season and drought influence fire effects on invasive grasses: A meta-analysis
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A global meta-analysis of the impacts of tree plantations on biodiversity
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Decline effects are rare in ecology: a meta-meta-analysis
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Elevated CO2 alleviates adverse effects of drought on plant water relations and photosynthesis: a global meta-analysis
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High temperature frequently increases facilitation between aquatic foundation species: A global meta-analysis of interaction experiments between angiosperms, seaweeds, and bivalves
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Data from: Comparing traditional and Bayesian approaches to ecological meta-analysis
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Smoking is associated with worse outcomes of COVID-19 particularly among younger adults: a systematic review and meta-analysis
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Meta-analysis data for Microcystin as a Biogeochemical Cycle: pools, fluxes, and fates of the cyanotoxin in inland waters
We constructed a conceptual biogeochemical model for microcystin through a comprehensive literature synthesis, identifying four major pools and nine major fluxes in lakes that also connect to the terrestrial environment. We also performed a literature synthesis, collating measurements of various pools and fluxes of microcystin in inland waters from the literature. A subset of those values were used in an analysis of microcystin detection for field surveys of waterbodies and a random effects model to estimate the mean and 95% confidence interval for various microcystin pools and fluxes in lakes.
The distance dependence prediction of the Janzen-Connell hypothesis: a meta-analysis
The Janzen‐Connell hypothesis explains the maintenance of tropical diversity through the interacting effects of parent‐centered dispersal patterns and distance‐ and density‐dependent propagule survival. These effects were thought to support regular spacing of species within tropical forest, enhancing diversity. One of the predictions of the hypothesis is that seed and seedling survival should improve with increased parental distance, due to reduced predation with increased parental distance. Although there are many independent tests of this hypothesis for individual species, there are few synthetic studies that have brought these data together to test its validity across species. Therefore, this data set was created as a part of a meta‐analysis of the effect of distance on enhancing propagule survival. It contains the results of 40 experimental studies which tested the above-mentioned distance dependent prediction of the Janzen-Connell hypothesis, by examining spatial patterns of seed and seedling predation.
Fate and Toxicity of Engineered Nanomaterials in the Environment: a Meta-analysis
Engineered nanomaterials (ENMs, particles less than 100 nanometers) are being manufactured at increasing levels for a variety of reasons including cosmetics, food packaging and preservation, fertilizers, and medical technology. Thousands of metric tons of ENMs are released to soils, water bodies, air, and landfills each year. These particles have distinct properties owing to their small size and relatively large surface area to volume ratio. These characteristics can result in these materials having higher reactivity and toxicity in biological systems - especially because ENMs are small enough to enter cells. However, studies on environmental and ecological effects of ENMs have shown mixed results. The goal of this project is to address three primary research questions using meta-analysis of existing literature: 1) Which ENMs have been studied and in what context? 2) How do particle identity, size, concentration, and study duration influence toxicity (as estimated by response ratios, lethal concentration (LC50), and effective concentration (EC50)) in different organisms related to the role they play in the environment? 3) What are bioaccumulation, biomagnification, and bioconcentration factors of ENMs as a function of ecosystem role and trophic level in different organisms? We collected data from 191 published scientific papers and extracted 2102 unique observations that are used to address the questions outlined above. We calculated response ratios related to biological responses of biomass, diversity, growth, metabolism, and survival to evaluate how these are influenced by ENM exposure. Values of LC50 (concentration at which 50% of test organisms died) and EC50 (concentration at which 50% of test organisms showed an effect) were collected to estimate concentrations at which toxicity occurs. Bioaccumulation (BAF), bioconcentration (BCF), and biomagnification (BMF) factors were recorded to estimate environmental accumulation and trophic transfer. This work is a resu
Data, Rcode and Supplementary Materials for: Effects of virgin micro- and nano-plastics on fish: Trends, meta-analysis and perspectives
<p><strong>Review_MNNP_Fish</strong></p> <p>Data, Rcode and Supplementary Materials for: Effects of virgin micro- and nano-plastics on fish: Trends, meta-analysis and perspectives</p> <p><strong>Supplementary_Information_1.pdf</strong>:<br> This document contains a list of names that are used in the database (see Supplementary_Information_2) to describe the biological endpoints investigated within the 46 studies that we have reviewed</p> <p><strong>Supplementary_Information_2.xlsx</strong>:<br> This document contains 6 sheets:</p> <ul> <li>'Database' sheet: contains the full database compiling the 46 studies and 782 biological endpoints analyzed in this review paper.</li> <li>'INFO' sheet: contains the information to understand how MP/NP sizes and concentrations were attributed to classes</li> <li>'Size_Class_analytics' sheet: contains the analyzed data (from the database) regarding MP/NP size classes and effects on fish biological functions. This sheet is used to build Figure 4.</li> <li>'Mass_Conc_analytics' sheet: contains the analyzed data (from the database) regarding MP/NP mass concentration classes and effects on fish biological functions. This sheet is used to build Figure 4.</li> <li>'Part_Conc_analytics' sheet: contains the analyzed data (from the database) regarding MP/NP particle concentration classes and effects on fish biological functions. This sheet is used to build Figure 4.</li> <li>'Exposure_Path_analytics' sheet: contains the analyzed data (from the database) regarding MP/NP exposure pathway and effects on fish biological functions. This sheet is used to build Figure 3.</li> </ul> <p><strong>Plabib_Fig2.xlsx</strong>:<br> This document contains the data necessary to build Figure 2 of this review paper. Data has been extracted from Supplementary_Information_2 database.</p> <p><strong>Plabib_Fig3_pie.txt</strong>:<br> This document contains the data necessary to build Figure 3 pie chart. Data has been extracted from Supplementary_Information_2 database.</p> <p><strong>PlaBib_Rcode_forFigures.R</strong>:<br> This document contains the Rcode necessary to build all figures from this manuscript</p>
Supporting Data for Tanioka and Matsumoto (2020), A meta-analysis on environmental drivers of marine phytoplankton C:N:P, Biogeosciences
<p>This dataset contains files used to make figures for Tanioka, T., & Matsumoto, K. (2020). A meta-analysis on environmental drivers of marine phytoplankton C:N:P. <em>Biogeosciences</em>, <em>17</em>(11), 2939–2954. <a href="https://doi.org/10.5194/bg-17-2939-2020">https://doi.org/10.5194/bg-17-2939-2020</a></p> <p><strong>Files uploaded:</strong></p> <p><strong>Bibliography</strong></p> <ol> <li>AppendixS1.pdf : list of 104 papers used in the main meta-analysis.</li> </ol> <p><strong>Excel spreadsheets</strong>:</p> <ol> <li>New_data_190211a.xlsx: C:N and C:P dataset</li> <li>res_all_190211a_P.csv: Effect sizes calculated for each P experiment</li> <li>res_all_190211a_N.csv: Effect sizes calculated for each N experiment</li> <li>res_all_190211a_Fe.csv: Effect sizes calculated for each Fe experiment</li> <li>res_all_190211a_I.csv: Effect sizes calculated for each I experiment</li> <li>res_all_190211a_I.csv: Effect sizes calculated for each T experiment</li> <li>META_BIiblio_articles1st_k4899.xlsx : list of 4899 in the first round of data collection/screening (see Fig. 1 in the main text)</li> <li>META_Biblio_articles2nd_k948.xlsx : list of 948 papers in the second round of data collection/screening (see Fig. 1 in the main text)</li> <li>META_Biblio_articles3rd_k196.xlsx : list of 196 papers in the third round of data collection/screening (see Fig. 1 in the main text)</li> </ol> <p><strong>R scripts:</strong></p> <ol> <li>analysis_190211a_test_P.R: script to conduct meta-analysis on P experiments</li> <li>analysis_190211a_test_N.R: script to conduct meta-analysis on N experiments</li> <li>analysis_190211a_test_F.R: script to conduct meta-analysis on Fe experiments</li> <li>analysis_190211a_test_I.R: script to conduct meta-analysis on I experiments</li> <li>analysis_190211a_test_T.R: script to conduct meta-analysis on T experiments</li> <li>functions_eff_logrr.R: function file to calculate ln(RR) (used in “analysis_190211a_test_X.R”)</li> <li>functions_scalc.R function file to calculate s-factor (used in “analysis_190211a_test_X.R”)</li> </ol>
Wealth, water and wildlife: landscape aridity intensifies the urban Luxury Effect - data used in meta-analysis
<p>The available Excel file contains all data used in the meta-analysis to analyse the Luxury Effect (i.e. the relationship between urban biodiversity and socioeconomic status) and its moderators (wealth status, species provenance and precipitation). Each column in the data set (tab ‘Data’) is defined as follows:</p> <p><strong>Location</strong>: Location (e.g. city) where a given study took place. If more than one geographical location was considered, they are detailed in the column 'Sample'</p> <p><strong>Sample: </strong>Any separate samples based either on location or temporal sampling period (e.g. geographical location, habitat types, different years) considered in a given paper. If the column is blank, only one location or period was considered.</p> <p><strong>Biodiversity measure: </strong>Defined into either diversity or abundance measures as defined in the text.</p> <p><strong>Response variable: </strong>The precise response variable analysed in the paper.</p> <p><strong>Socioeconomic variable: </strong>The socioeconomic variable analysed in the paper.</p> <p><strong>Provenance: </strong>Native or exotic species, where specified. 'All' refers both to papers where it was explicitly stated that both native and exotic species were considered, and those where no information was given, but we assumed that native and exotic species had been considered.</p> <p><strong>Development status: </strong>Countries with developed economies ('Rich') and countries with developing economies 'Poor') as defined in the text.</p> <p><strong>Gradient length: </strong>Studies including only urbanized areas ('Short') and those also including rural sampling locations ('Long').</p> <p><strong>Precipitation: </strong>in mm.</p> <p><strong>Pearson's r: </strong>Standardized values used in the meta-analysis.</p> <p> </p> <p>Note the above information is also available in the Excel file in the ‘Notes’ tab. </p> <p> </p>
Data from: Intravenous thrombolysis in patients with chronic kidney disease: A systematic review and meta-analysis
<p><b><span>Objective</span></b><span> We sought to determine the association of chronic kidney disease (CKD) with the safety and efficacy of intravenous thrombolysis (IVT) among acute ischemic stroke (AIS) patients.</span></p> <p><b><span>Methods</span></b><span> Systematic review and pairwise meta-analysis of studies involving patients with CKD undergoing IVT for AIS were conducted to evaluate the following outcomes: symptomatic intracranial hemorrhage (sICH), asymptomatic and any ICH, in-hospital and 3-month mortality, </span>3-month favorable functional outcome (FFO, mRS 0-1) and <span>3-month functional independence (FI, mRS 0-2). CKD was defined using estimated glomerular filtration rate (eGFR) ranging from mild (eGFR: 60-89ml/min), moderate (eGFR: 30-59ml/min) and severe (eGFR: 15-29ml/min). </span></p> <p><b><span>Results</span></b><span> We identified 20 studies comprising </span>60,486 AIS <span>patients treated with IVT. In unadjusted analyses, CKD was associated with </span>sICH according to NINDS (7 studies; OR=1.41, 95%CI: 1.19–1.67) and ECASS-II (9 studies; OR=1.37, 95%CI: 1.01–1.85) definitions, any ICH (8 studies; OR=1.42, 95%CI: 1.18–1.70), 3-month mortality (9 studies; OR = 2.20, 95%CI: 1.72–2.81)<span>, </span>3-month FFO (8 studies; OR=0.58, 95%CI: 0.47–0.72) and <span>3-month FI</span> (8 studies; OR=0.57, 95%CI: 0.46–0.71). In adjusted analyses, <span>CKD</span> was associated with sICH according to NINDS (4 studies; OR<sub>adj</sub>=1.34, 95%CI: 1.01–1.79) and ECASS-II (3 studies; OR<sub>adj</sub>=2.08, 95%CI 1.27–3.43) definitions, any ICH (6 studies; OR<sub>adj</sub>=1.41, 95%CI 1.01–1.97), in-hospital mortality (2 studies; OR<sub>adj</sub> =1.19; 95%CI, 1.09-1.30) and 3-month FFO (6 studies; OR<sub>adj</sub>=0.80, 95%CI 0.70–0.92). </p> <p><b><span>Conclusions</span></b><span> After adjustment for confounders in this pairwise meta-analysis, moderate-severe CKD is associated with increased risks of intracranial hemorrhage and worse functional outcomes among AIS patients treated with IVT. </span></p>
Meta-analysis reveals materiomic relationships in major ampullate silk across the spider phylogeny
<p>Spider Major Ampullate (MA) silk, with its combination of strength and extensibility, outperforms any synthetic equivalents. There is thus much interest in understanding its underlying materiome. While expression of the different silk proteins (spidroins) appears an integral component of silk performance, our understanding of the nature of the relationship between the spidroins, their constituent amino acids, and MA silk mechanics is ambiguous. To provide clarity on these relationships across spider species we performed a meta-analysis utilizing phylogenetic comparative methods. These showed that glycine and proline, both of which are indicators of differential spidroin expression, had effects on MA silk mechanics across the phylogeny. We also found serine to correlate with silk mechanics, probably via its presence within the carboxyl and amino terminal domains of the spidroins. From our analyses we concluded that spidroin expression shifts across the phylogeny from predominantly MaSp1 in the MA silks of ancestral spiders to predominantly MaSp2 in the more derived spider's silks. This trend was accompanied by an enhanced ultimate strain and decreased Young's modulus in the silks. Our meta-analysis enabled us to decipher between real and apparent influences on MA silk properties, providing significant insights into spider silk and web co-evolution and enhancing our capacity to create spider silk-like materials.</p>
Stress in the city: meta-analysis indicates no overall evidence for stress in urban vertebrates
<p>As cities continue to grow it is increasingly important to understand the long-term responses of wildlife to urban environments. There have been increased efforts to determine whether urbanization imposes chronic stress on wild animals, but empirical evidence is mixed. Here we conduct a meta-analysis to test whether there is, on average, a detrimental effect of urbanisation based on baseline and stress-induced glucocorticoid levels of wild vertebrates. We found no effect of urbanisation on glucocorticoid levels, and neither sex, season, life stage, taxon, size of the city nor methodology accounted for variation in the observed effect sizes. At face value our results suggest that urban areas are no more stressful for wildlife than rural or non-urban areas, but we offer a few reasons why this conclusion could be premature. We propose that refining methods of data collection will improve our understanding of how urbanization affects the health and survival of wildlife.</p>
ScienceDex guides
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These curated guides explain access requirements, typical timelines, costs, and reuse considerations for widely used research datasets.
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.