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29 results for “Quercus ilex”
Herbarium specimen image of Quercus ilex L., part of the collection of National Museum of Natural History, Paris
Part of a training dataset of scanned herbarium specimens. The data paper and a summary landing page will be published on Zenodo as it gets published.<br><br>Content of this deposition:<br><br>- A JSON-LD datafile listing the label data associated with this herbarium specimen. The Darwin and Dublin Core data standards are used for most values.<br>- A JPEG image file of the scanned herbarium sheet.
SQLite3 databases of candidate marker loci from ddRADseq in Quercus suber, Quercus ilex and their hybrids
<p>The dataset contatins four SQLite3 databases of candidate marker loci from ddRADseq in <em>Quercus suber</em>, <em>Quercus ilex </em>and their hybrids, corresponding to the data collected for the four filtering/imputation scenarios considered in the manuscript "ddRAD sequencing-based identification of species genomic boundaries and permeability in <em>Quercus ilex</em> and <em>Q. suber</em> hybrids" submitted to Frontiers in Plant Sciences. This work was funded by the project AGL2015-67495-C2-2-R (Spanish Ministry of Economy and Competitiveness).</p>
Quercus ilex L. (BR0000024489133)
Belgium Herbarium image of <a href="https://www.plantentuinmeise.be">Meise Botanic Garden</a>.
Quercus ilex L. (BR0000012569250)
Belgium Herbarium image of <a href="https://www.plantentuinmeise.be">Meise Botanic Garden</a>.
Quercus ilex L. (BR0000012569151)
Belgium Herbarium image of <a href="https://www.plantentuinmeise.be">Meise Botanic Garden</a>.
Data from: Insect herbivory in novel Quercus ilex L. forests: the role of landscape attributes, forest composition and host traits
<p><b><i>Context</i></b> Understanding the intrinsic and extrinsic drivers of herbivory in novel expanding forests is essential to envisage their role for biodiversity conservation.</p> <p><b><i>Aims</i></b>: To analyze the effects of landscape attributes, forest composition, genetic relatedness, ontogeny and leaf traits on insect herbivory in novel <i>Q. ilex</i> forest stands.</p> <p><b><i>Methods: </i></b>In 15 forest patches, we examined effects of patch size and connectivity, forest composition, and tree height, specific leaf area (SLA) and nitrogen content on herbivory. In 3 forest patches, we assessed effects of tree genetic relatedness, ontogeny and spatial distribution.</p> <p><b><i>Results</i></b>: Herbivory was lower in pine-oak than in mixed-oak forests owing to the shorter tree height in the former with no effects of patch size or connectivity. Herbivory increased with SLA whereas nitrogen content had no effect. Within patches, herbivory differed among genetic clusters and was reduced in saplings growing near mature oaks and individuals near the forest edge. </p> <p><b><i>Conclusion </i></b>We illustrate the strong context and scale dependence of tree-herbivore interactions that renders predictions for dynamic systems such as novel oak forests extremely challenging. It implies, however, that the structural heterogeneity of such unmanaged forests allows their function as stepping stones for insect herbivore diversity in fragmented landscapes.</p>
Dataset for: Interactive effects of tree species composition and water availability on growth and direct and indirect defences in Quercus ilex
<p>Plant diversity has often been reported to decrease insect herbivory in plants. Of the numerous mechanisms that have been proposed to explain this phenomenon, how plant diversity influences plant defences via effects on growth has received little attention. In addition, plant diversity effects may be contingent on abiotic conditions (e.g., resource and water availability). Here, we used a long-term experiment to explore the interactive effects of tree species composition and water availability on growth, direct (i.e. phenolics) and indirect (i.e. Volatile Organic Compounds – VOCs) defences and leaf herbivory in <em>Quercus ilex</em>. We quantified herbivory by chewing insects, phenolic compounds and VOCs in <em>Q. ilex</em> trees growing in stands differing in tree species composition (<em>Q. ilex</em>, <em>Q. ilex</em> + <em>Betula Pendula</em>, <em>Q. ilex</em> + <em>Pinus pinaster</em> and <em>Q. ilex</em> + <em>B. pendula</em> + <em>P. pinaster</em>) and water availability (irrigated vs control). Both direct and indirect defences were affected by tree species composition, but such changes were not mediated by changes in tree stem diameter. <em>Q. ilex</em> trees growing in stands with <em>P. pinaster</em> had the lowest concentration of both direct and indirect defences. Importantly, the effects of tree species composition on VOCs were exacerbated on irrigated blocks. Despite variation in defences, tree species composition did not affect herbivory in <em>Q. ilex</em>. Accordingly, we did not find any association between defences and insect herbivory. Our results suggest that changes in the micro-environment rather than growth-defence associations may mediate tree diversity effects on defences. In addition, reduced defensive investment in more diverse stands could negatively impact tree resistance masking the beneficial effects of species diversity at reducing insect herbivory.</p>
Potential and realized distribution at 30m for Holm oak (Quercus ilex) in Europe for 2000 - 2020
<p>Probability and uncertainty maps showing the potential and realized distribution for the holm oak (<em>Quercus ilex L.</em>) for Europe from the dataset prepared by <a href="http://doi.org/10.5281/zenodo.5818021">Bonannella et al. (2022)</a> and predicted using Ensemble Machine Learning (EML). Potential distribution map cover the period 2018 - 2020; realized distribution cover the period 2000 - 2020, split in the following time periods:</p> <ul> <li>2000 - 2002,</li> <li>2002 - 2006,</li> <li>2006 - 2010,</li> <li>2010 - 2014,</li> <li>2014 - 2018,</li> <li>2018 - 2020.</li> </ul> <p>Files are named according to the following naming convention, e.g:</p> <ul> <li>veg_quercus.ilex_anv.eml_md_30m_0..0cm_2000..2002_eumap_epsg3035_v0.3</li> </ul> <p>with the following fields:</p> <ul> <li>theme: e.g. <strong>veg</strong>,</li> <li>species code: e.g. <strong>quercus.ilex</strong>,</li> <li>species distribution type: e.g. <strong>anv</strong> (= actual natural vegetation),</li> <li>species estimation method: e.g. <strong>eml</strong>,</li> <li>species estimation type: e.g. <strong>md</strong> ( = model deviation),</li> <li>resolution in meters e.g. <strong>30m</strong>,</li> <li>reference depths (vertical dimension): e.g. <strong>0..0cm</strong>,</li> <li>reference period begin end: e.g. <strong>2000..2002</strong>,</li> <li>reference area: e.g. <strong>eumap</strong>,</li> <li>coordinate system: e.g. <strong>epsg3035</strong>,</li> <li>data set version: e.g. <strong>v0.3</strong>.</li> </ul> <p>For each species is then easy to identify probability and uncertainty distribution maps:</p> <ul> <li>veg_quercus.ilex_<strong>anv</strong>.eml_<strong>md</strong>: model uncertainty for realized distribution</li> <li>veg_quercus.ilex_<strong>anv</strong>.eml_<strong>p</strong>: probability for realized distribution</li> <li>veg_quercus.ilex_<strong>pnv</strong>.eml_<strong>md</strong>: model uncertainty for potential distribution</li> <li>veg_quercus.ilex_<strong>pnv</strong>.eml_<strong>p</strong>: probability for potential distribution</li> </ul> <p>Files are provided as <a href="https://gdal.org/drivers/raster/cog.html">Cloud Optimized GeoTIFFs</a> and projected in the Coordinate Reference System ETRS89 / LAEA Europe (= EPSG code 3035). Styling files are provided in both <em>SLD</em> and <em>QML</em> format.</p> <p>If you would like to know more about the creation of the maps and the modeling:</p> <ul> <li><strong>watch</strong> the talk at Open Data Science Workshop 2021 (<a href="https://doi.org/10.5446/55256">TIB AV-PORTAL</a>)</li> <li><strong>access </strong>the repository with our R/Python scripts and follow the instructions (<a href="https://gitlab.com/geoharmonizer_inea/spatial-layers/-/tree/master/veg_mapping">GitLab</a>)</li> <li><strong>access </strong>the repository with the training dataset (<a href="https://doi.org/10.5281/zenodo.5818021">Zenodo</a>)</li> <li><strong>read </strong>the tutorial with executable code on our <a href="https://opengeohub.github.io/spatial-prediction-eml/spatiotemporal-ml.html#spatiotemporal-distribution-of-fagus-sylvatica">GitBook</a></li> </ul> <p> </p> <p>A publication describing, in detail, all processing steps, accuracy assessment and general analysis of species distribution maps is available on <a href="https://doi.org/10.7717/peerj.13728">PeerJ</a>. To suggest any improvement/fix use <a href="https://gitlab.com/geoharmonizer_inea/spatial-layers/-/issues">https://gitlab.com/geoharmonizer_inea/spatial-layers/-/issues</a></p>
FIGURE 4 in Quercus pseudosetulosa, a new species of Quercus sect. Ilex (Fagaceae) from Dawanshan Island, Guangdong, China
FIGURE 4. The leaf anatomy of Quercus pseudosetulosa. bar = 50 μm. a & b. Leaf adaxial epidermis. c–e. Leaf abaxial epidermis under the light microscope. c. Black arrow showing the compound trichome base; d & e. White arrows showing the super stomata. f & g. Leaf abaxial epidermis under SEM, the white arrow showing the super stomata and smooth epicuticular wax flake and flat stomata. h & i. Leaf cross section. h. Overview of the cross section. paI: palisade mesophyll next to the adaxial epidermis; paII: palisade mesophylla next to abaxial epidermis; sp: spongy mesophyll; VB: vascular bundle. i. Showing the simple epidermis on leaf adaxial surface and the vascular channel reach to the surface (showed by white arrow).
FIGURE 1 in Quercus pseudosetulosa, a new species of Quercus sect. Ilex (Fagaceae) from Dawanshan Island, Guangdong, China
FIGURE 1. Line drawing of Quercus pseudosetulosa. A. Fruit branch; B. Abaxial leaf surface; C. Pistillate flowers; D. Mature fruit. (Drawn by Dr. Wen SHAO from the holotype T.Y. Tu & S.C. Li LSC185).
FIGURE 7 in Quercus pseudosetulosa, a new species of Quercus sect. Ilex (Fagaceae) from Dawanshan Island, Guangdong, China
FIGURE 7. The high venation and the veins forming the teeth of Quercus pseudosetulosa, scale bar = 1 mm. a–c. Showing the irregular quinternary vein fabric and well developed areolation. The freely ending veinlets (FEVs) are mostly unbranched and absent. d–f. The veins forming the teeth. The branched 2° veins subdivided into principal vein and admedial vein, the later forming a loop joining the upper 2° vein branched loop. (The sampled individuals: a, d: Deng et al. 13987; b, e: Deng et al. 14053; c: Deng et al. 13997; f: Deng et al. 13983).
FIGURE 3 in Quercus pseudosetulosa, a new species of Quercus sect. Ilex (Fagaceae) from Dawanshan Island, Guangdong, China
FIGURE 3. Natural habitats and living plant of Quercus pseudosetulosa in Dawanshan Island in South China Sea. a. Landscape of the natural habitat. The yellow arrows indicate the different individuals of Q. pseudosetulosa. b. Living plant. c. Fruiting branch showing the mature acorn, scale bar = 1 cm. The red arrow shows the pistillate flowers of current year.
FIGURE 5 in Quercus pseudosetulosa, a new species of Quercus sect. Ilex (Fagaceae) from Dawanshan Island, Guangdong, China
FIGURE 5. Leaf shape variation and leaf architecture of Quercus pseudosetulosa. Showing the irregular 2° vein spacing irregular, the branched 2° vein. Leaf margin entire or serrate at upper half.(Leaf from left to right were taken respectively from voucher species of Deng et al. 13989, 13984, 13997, 13983, 13987, 13984, 14053, 14058).
FIGURE 6 in Quercus pseudosetulosa, a new species of Quercus sect. Ilex (Fagaceae) from Dawanshan Island, Guangdong, China
FIGURE 6. Leaf morphological variation of Quercus pseudosetulosa. bar = 5 mm. a–e. Showing the cuneate to broad cuneate to rounded leaf base. f–j. Showing the leaf tips verified from long acuminate to short acuminate to acute. k–o. Variation of the marginal teeth. The teeth shape verified from obtuse to serrate to sharp serrate. (The sampled individuals: a, f, k: Deng et al. 14058; b, h, m: Deng et al. 13983; c, i, n: Deng et al. 13997; d, g, l: Deng et al. 14053; e, j, o: Deng et al. 13987).
Quercus Ilex and Quercus Robur Allergen Extracts Standardisation
ClinicalTrials.gov study NCT05532566. IPD Sharing: NO. Countries: 1. Publications: 3.
Dataset for: Interactive effects of tree species composition and water availability on growth and direct and indirect defences in Quercus ilex
Open the record for dataset details and reuse information.
Data from: Insect herbivory in novel Quercus ilex L. forests: the role of landscape attributes, forest composition and host traits
Open the record for dataset details and reuse information.
FIGURE 2 in Quercus pseudosetulosa, a new species of Quercus sect. Ilex (Fagaceae) from Dawanshan Island, Guangdong, China
FIGURE 2. Image of holotype of Quercus pseudosetulosa, Tu, T.Y. & Li S.C. -LSC185 (CSH).
What feeds on Quercus ilex L.? A biogeographical approach to studying trophic interactions in a Mediterranean keystone species
<p>Holm oak (<i>Quercus ilex</i> L.) is regarded as a keystone plant species. Although trophic interactions may affect the phytophagous species distribution and abundance, the number of arthropod species using holm oak as a food resource and their levels of host specificity is not yet known. Here we aim to quantify these species, their feeding strategies and conservation status, investigate the taxonomic relatedness in each trophic guild and assess their degree of host specificity with the holm oak.<span>We reviewed the existing literature and compiled information about all arthropod species that feed on <i>Q. ilex</i>, as well as their feeding strategies and conservation status. We also investigated the relationships between trophic guilds and the taxonomic relatedness of species and assessed the degree of climatic niche overlap with holm oak. We found that 605 species feed on seven different parts of the holm oak plant (<i>i.e</i>., feeding strategies). More than 90% of these species lack a conservation status assessment and eight are threatened by human activities, either as vulnerable, endangered, or critically endangered. A significant phylogenetic relationship was found between taxonomic relatedness and groups of arthropods that feed on the same part of the plant (<i>i.e</i>., trophic guilds). Twenty percent of the species had similar niches, thereby indicating the potentially high host dependence of these species. </span>This study highlights the significance of a keystone tree species for arthropod conservation and the need for further research into the distribution and conservation status of arthropod species in Mediterranean holm oak woodlands.</p>
Figure 3 from: Morano E, Bonal R (2016) Cheiracanthium ilicis sp. n. (Araneae, Eutichuridae), a novel spider species associated with Holm Oaks (Quercus ilex). ZooKeys 601: 21-39. https://doi.org/10.3897/zookeys.601.8241
Figure 3 - DNA phylogeny of one mitochondrial (cox1) and one nuclear (28S) genes showing the phylogenetic position of Cheiracanthium ilicis sp. n. within its genus. Tree topology was inferred using maximum likelihood (GTR + I + Gamma substitution model) and Bayesian inference.
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