1,720,970 research outputs found
Plant functional and taxonomic diversity in European grasslands along climatic gradients
No full textData information to the paper
Boonman, C.C.F. et al. (2021) Plant functional and taxonomic diversity in European grasslands along climatic gradients. Journal of Vegetation Science. DOI: 10.1111/jvs.13027
Here, we discuss how both functional and taxonomic diversity of European grasslands change along temperature and precipitation gradients. We compare trends and discuss functional richness effect sizes which correct functional richness values for local taxonomic richness. Specifically, assessed the variation along a minimum temperature, annual temperature range, annual precipitation, and precipitation seasonality gradients.
Species occurence data was collected from the European Vegetation Archive. This data was linked to trait data from the TRY database. We used species averages of specific leaf area (SLA), leaf nitrogen concentration (LNC), plant height, seed mass, specific root length (SRL), and rooting depth (i.e., not including intraspecific trait variation). Gaps of missing trait data was filled using the ‚mice‘ function of the mice package. Per plant community, taxnomic richness (number of species) was calculated. Further, the functional richness was calculated as the convexhull volume (see paper for more details). And effect sizes were calculated with a null model which randomly shuffles species trait values in the trait dataset but retains species’ trait combinations.
For the European analysis, we used the average of the original functional richness values and effect size values in one grid cell (~1 km2) if more than one plot was sampled. This resulted in 19,179 data points and grid cells that were regressed along climate variables using a multiple general additive modelling approach.
The data files include diversity data, longitude and latitude, and various climate variables. In addition, we included two Rscripts that calculate the functional richness effect size. The README.txt describes all files in more detail
Plant functional and taxonomic diversity in European grasslands along climatic gradients
No full textData information to the paper
Boonman, C.C.F. et al. (2021) Plant functional and taxonomic diversity in European grasslands along climatic gradients. Journal of Vegetation Science. DOI: 10.1111/jvs.13027
Here, we discuss how both functional and taxonomic diversity of European grasslands change along temperature and precipitation gradients. We compare trends and discuss functional richness effect sizes which correct functional richness values for local taxonomic richness. Specifically, assessed the variation along a minimum temperature, annual temperature range, annual precipitation, and precipitation seasonality gradients.
Species occurence data was collected from the European Vegetation Archive. This data was linked to trait data from the TRY database. We used species averages of specific leaf area (SLA), leaf nitrogen concentration (LNC), plant height, seed mass, specific root length (SRL), and rooting depth (i.e., not including intraspecific trait variation). Gaps of missing trait data was filled using the ‚mice‘ function of the mice package. Per plant community, taxnomic richness (number of species) was calculated. Further, the functional richness was calculated as the convexhull volume (see paper for more details). And effect sizes were calculated with a null model which randomly shuffles species trait values in the trait dataset but retains species’ trait combinations.
For the European analysis, we used the average of the original functional richness values and effect size values in one grid cell (~1 km2) if more than one plot was sampled. This resulted in 19,179 data points and grid cells that were regressed along climate variables using a multiple general additive modelling approach.
The data files include diversity data, longitude and latitude, and various climate variables. In addition, we included two Rscripts that calculate the functional richness effect size. The README.txt describes all files in more detail
Dataset from: On the importance of root traits in seedlings of tropical tree species
No full textData from: On the importance of root traits in seedlings of tropical tree species
Here, we discuss biomass allocation of tropical tree species at the seedling stage, and how they differ between species originating from different vegetation types. We discuss how extreme stressors (drought and fire) can alter biomass allocation patterns as expected under the functional equilibrium hypothesis. Specifically, we tested whether above- and below-ground traits of tropical tree seedlings could explain observed occurrence along gradients of resources (light, water) and defoliation(fire, herbivory).
We selected species from the following taxa: Meliaceae, Leguminosae, and Combretaceae, found on the following ecosystems: dry savanna, wet savanna, moist savanna, transition zone, dry forest, wet forest, moist forest. The seedlings grew for 6 months in a greenhouse. The experiment started in June 2015. We measured the following traits: starch concentration; specific root length; mean rooting depth; root mass fraction; leaf area ratio; specific leaf area; leaf size; stem mass fraction; leaf mass fraction; plant weight. The root data was analyzed with WinRHIIZO software.
This dataset contains information on all traits for all species included in the experiment (mean and standard deviation values)
The role of environmental filtering on terrestrial plant trait distributions at large spatial scales
No full textDataset from: On the importance of root traits in seedlings of tropical tree species
No full textData from: On the importance of root traits in seedlings of tropical tree species
Here, we discuss biomass allocation of tropical tree species at the seedling stage, and how they differ between species originating from different vegetation types. We discuss how extreme stressors (drought and fire) can alter biomass allocation patterns as expected under the functional equilibrium hypothesis. Specifically, we tested whether above- and below-ground traits of tropical tree seedlings could explain observed occurrence along gradients of resources (light, water) and defoliation(fire, herbivory).
We selected species from the following taxa: Meliaceae, Leguminosae, and Combretaceae, found on the following ecosystems: dry savanna, wet savanna, moist savanna, transition zone, dry forest, wet forest, moist forest. The seedlings grew for 6 months in a greenhouse. The experiment started in June 2015. We measured the following traits: starch concentration; specific root length; mean rooting depth; root mass fraction; leaf area ratio; specific leaf area; leaf size; stem mass fraction; leaf mass fraction; plant weight. The root data was analyzed with WinRHIIZO software.
This dataset contains information on all traits for all species included in the experiment (mean and standard deviation values)
Macroclimatic shift exposure to global tree diversity
No full textItem does not contain fulltextThe data provided here are an extension to the Github repository named The 'MacroClimaticShifts' from Coline Boonman and 'MacroClimaticShifts' from Selwyn Hoeks, which include all processed data, scripts and output of this scientific paper
Assessing_the_reliability_of_predicted_plant_trait_distributions_at_the_global_scale.txt
No full textGlobal trait data (SLA, LNC, height, wood density) of vascular plants, georeferenced at community mean level. Data includes intra-specific trait variation. We also have global predictions of these traits at 0.5degree resolution.</div
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Get PDF“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
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