Institute of Biology

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Author: search.filters.author.Lenoir, JonathanHas files: No

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    Item type:Publication,
    Ellenberg‐type indicator values for European vascular plant species
    (Wiley, 2023-01)
    Tichý, Lubomír
    ;
    Axmanová, Irena
    ;
    Dengler, Jürgen
    ;
    Guarino, Riccardo
    ;
    Jansen, Florian
    <jats:title>Abstract</jats:title><jats:sec><jats:title>Aims</jats:title><jats:p>Ellenberg‐type indicator values are expert‐based rankings of plant species according to their ecological optima on main environmental gradients. Here we extend the indicator‐value system proposed by Heinz Ellenberg and co‐authors for Central Europe by incorporating other systems of Ellenberg‐type indicator values (i.e., those using scales compatible with Ellenberg values) developed for other European regions. Our aim is to create a harmonized data set of Ellenberg‐type indicator values applicable at the European scale.</jats:p></jats:sec><jats:sec><jats:title>Methods</jats:title><jats:p>We collected European data sets of indicator values for vascular plants and selected 13 data sets that used the nine‐, ten‐ or twelve‐degree scales defined by Ellenberg for light, temperature, moisture, reaction, nutrients and salinity. We compared these values with the original Ellenberg values and used those that showed consistent trends in regression slope and coefficient of determination. We calculated the average value for each combination of species and indicator values from these data sets. Based on species’ co‐occurrences in European vegetation plots, we also calculated new values for species that were not assigned an indicator value.</jats:p></jats:sec><jats:sec><jats:title>Results</jats:title><jats:p>We provide a new data set of Ellenberg‐type indicator values for 8908 European vascular plant species (8168 for light, 7400 for temperature, 8030 for moisture, 7282 for reaction, 7193 for nutrients, and 7507 for salinity), of which 398 species have been newly assigned to at least one indicator value.</jats:p></jats:sec><jats:sec><jats:title>Conclusions</jats:title><jats:p>The newly introduced indicator values are compatible with the original Ellenberg values. They can be used for large‐scale studies of the European flora and vegetation or for gap‐filling in regional data sets. The European indicator values and the original and taxonomically harmonized regional data sets of Ellenberg‐type indicator values are available in the Supporting Information and the Zenodo repository.</jats:p></jats:sec>
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    Rooting depth and xylem vulnerability are independent woody plant traits jointly selected by aridity, seasonality, and water table depth
    (Wiley, 2023-12)
    Laughlin, Daniel C
    ;
    Siefert, Andrew
    ;
    Fleri, Jesse R
    ;
    Tumber-Dávila, Shersingh Joseph
    ;
    Hammond, William M
    Evolutionary radiations of woody taxa within arid environments were made possible by multiple trait innovations including deep roots and embolism-resistant xylem, but little is known about how these traits have coevolved across the phylogeny of woody plants or how they jointly influence the distribution of species. We synthesized global trait and vegetation plot datasets to examine how rooting depth and xylem vulnerability across 188 woody plant species interact with aridity, precipitation seasonality, and water table depth to influence species occurrence probabilities across all biomes. Xylem resistance to embolism and rooting depth are independent woody plant traits that do not exhibit an interspecific trade-off. Resistant xylem and deep roots increase occurrence probabilities in arid, seasonal climates over deep water tables. Resistant xylem and shallow roots increase occurrence probabilities in arid, nonseasonal climates over deep water tables. Vulnerable xylem and deep roots increase occurrence probabilities in arid, nonseasonal climates over shallow water tables. Lastly, vulnerable xylem and shallow roots increase occurrence probabilities in humid climates. Each combination of trait values optimizes occurrence probabilities in unique environmental conditions. Responses of deeply rooted vegetation may be buffered if evaporative demand changes faster than water table depth under climate change.