![]() For conservation and biogeographical purposes, it is crucial to detect and discard doubtful occurrences. Remaining regional or national gaps can be filled only by collecting data in the field or through expert knowledge (4) Reliability: the reliability of the different sources is highly variable, especially information from biodiversity data portals 4. Gathering them requires identifying local datasets and/or contacting local flora specialists. However, many local data remain inaccessible and/or non-digitalized. Scientific and naturalist communities support and promote increasing data-sharing habits, and some data are publicly available through dedicated platforms. 1 (2) Spatial resolution: the spatial grain of the data varies (from georeferenced coordinates for single records to data gridded at varying resolutions) (3) Accessibility: the collection of species occurrence data is generally managed at the national or regional scale. The current occurrence data available from various sources in different countries present challenges related to: (1) Taxonomy: not all sources use the same taxonomic reference to name the recorded species 3 and present the same level of updating regarding recently described taxa Médail et al. 1 from Portugal to Greece, including islands) are still sparse, not readily available, and present heterogeneous spatial and taxonomic coverage and resolution. The production of woody forest products represents 35% of the total economic value of Mediterranean forests 2.Īlthough critical for biogeographical and conservation applications, data on the occurrence, functional traits, and phylogeny of the tree species of the Euro-Mediterranean region (as defined by Médail et al. trees commonly considered as bushes with poorly defined multicolous stems but which can form true trees under certain environmental conditions), and a high number of endemics. The forests of the Euro-Mediterranean Basin are home to 245 indigenous tree taxa (species and subspecies), 44 of which are cryptic (as defined by Médail et al. The WOODIV database can benefit macroecological studies in the fields of conservation, biogeography, and community ecology. We also gathered functional trait and genetic data, filling existing gaps where possible. We compiled, homogenized, and verified occurrence data from sparse datasets and collated them on an INSPIRE-compliant 10 × 10 km grid. The WOODIV database fills this gap by providing reliable occurrences, four functional traits (plant height, seed mass, wood density, and specific leaf area), and sequences from three DNA-regions ( rbcL, matK, and trnH- psbA), together with modelled occurrences and a phylogeny for all 210 Euro-Mediterranean tree species. Despite its particularities and vulnerability, the biodiversity of Mediterranean trees is not well known at the taxonomic, spatial, functional, and genetic levels required for conservation applications. In the Mediterranean Basin, forests cover approximately 22% of the total land area hosting a large number of endemics (46 species). Trees play a key role in the structure and function of many ecosystems worldwide. Scientific Data volume 8, Article number: 89 ( 2021) WOODIV, a database of occurrences, functional traits, and phylogenetic data for all Euro-Mediterranean trees
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