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Diversity

Diversity is a peer-reviewed, open access journal on the science of biodiversity (from molecules, genes, populations, and species to ecosystems), and is published monthly online by MDPI.

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All Articles (6,585)

  • Review
  • Open Access

Research at the interface of biodiversity conservation, urban forestry, and urban green space spans ecology, forestry, landscape planning, environmental management, and public health, making its intellectual structure difficult to apprehend through narrative review alone. This study maps a corpus of 3747 documents published from 2006 to 17 August 2026, retrieved from the OpenAlex API on 13 October 2026 after integrity checking and deduplication. Performance analysis, country-level collaboration networks, lexical co-occurrence on titles and abstracts (abstract coverage 82.6% after supplementation), strategic mapping, thematic evolution, co-citation, and bibliographic coupling were computed with scripts released with the article; stochastic community partitions were evaluated over 200 seeded runs. Across the complete years 2006–2025, retrieved annual output increased at a compound annual rate of 15.89%. The corpus spans 1316 journals and affiliations in 124 countries. China leads publication output, whereas Germany and the USA occupy the strongest brokerage positions in the collaboration network. Author-derived text resolves six lexical clusters (modularity = 0.442), in which health and planning vocabulary joins climate and green-infrastructure terms and carbon vocabulary joins tree and plant species, and co-citation of the 200 most cited references identifies six communities (modularity = 0.507). More than half of the corpus (54.9%) enters only through green-space terms, and removing these documents changes the lexical partition substantially; a replica of a prior green-space mapping shows that urban-forestry terms distinguish the corpus. The mapped literature is increasingly connected to climate, health, and planning agendas.

Diversity

6 November 2026

Flow diagram of corpus retrieval, extraction, deduplication, and screening (extraction of 13 October 2026). Counts are those of Table 1; the analytical subsets on the right give the coverage of each document-level field used in Section 3. The two shaded boxes mark the initial query result and the final analytical corpus.
  • Article
  • Open Access

Fritillaria mardinensis (Liliaceae), a New Species from Southeastern Türkiye

  • Cahit Çeçen,
  • Veysel Sonay and
  • Yavuz Bülent Köse
  • + 2 authors

Fritillaria mardinensis Balos, C. Çeçen, Köse & Sonay sp. nov. (Liliaceae) is described as a new species from Mardin Province, southeastern Türkiye. It is morphologically similar to F. armena and F. zagrica but differs from the related species F. armena and F. zagrica by its longer stem structure, yellowish hairy/striped mosaic pattern at the tepal tips, linear nectary structure, and capsule morphology containing longitudinally dark green striped, winged seeds. Diagnostic characters, description, detailed illustration, geographical distribution, conservation assessment, observations and taxonomic comments regarding the new species are given. ITS sequence data are compatible with the placement of the species in Fritillaria but are uninformative at the species level, as F. mardinensis falls in an unresolved polytomy with F. armena and other congeners; its delimitation therefore rests on morphology.

Diversity

6 November 2026

Fritillaria mardinensis. (A). Habitat. (B–D). Plant in natural habitat. (E–H). Perigon structures.
  • Article
  • Open Access

The long-eared hedgehog, Hemiechinus auritus, has the broadest distribution among Erinaceidae, yet its intraspecific taxonomy remains contentious, with three to six subspecies recognized. We examined the phylogeographic structure of the species across nearly its entire distribution range using two mitochondrial genes (cytb, COI) for 153 specimens from 103 localities, complemented by complete mitogenomes for seven individuals. Phylogenetic reconstructions recovered five deeply divergent, well-supported mitochondrial lineages (p-distances 2–4%): Northern, Eastern, Transcaucasian, South-western and Southern. The Southern lineage, which includes specimens from the type locality of H. a. megalotis, was recovered as the basal branch, whereas the Northern and Eastern lineages formed a derived clade. Demographic analyses indicated recent postglacial expansion in the Northern and Eastern lineages, but not in the Southern and South-western lineages. Species distribution modelling reconstructed Pleistocene range fragmentation during glacial maxima, with divergence among lineages dated to the late Middle and Late Pleistocene. The mitochondrial lineages are partly congruent with the main morphological subspecies, although the status of H. a. megalotis and H. collaris requires further scrutiny. Our results indicate that H. auritus may represent a complex of several divergent lineages, whose evolutionary independence and taxonomic status should be tested with nuclear genomic data.

Diversity

6 November 2026

Distribution of sampling localities and phylogroups of Hemiechinus auritus. Northern phylogroup 1−49, Eastern phylogroup 49−65, Transcaucasian 66−68, South-western phylogroup 69−92, Southern phylogroup 93−103, H. collaris—104. Locality 49 contains individuals from both the Northern and Eastern phylogroups. The description of localities with detailed geographic information is given in Table S1-A.
  • Article
  • Open Access

The truffle genus Genea plays an important role as an ectomycorrhizal fungus, yet its taxonomy, evolutionary relationships, and ecological behaviour remain poorly understood globally. This study describes Genea budensis sp. nov. and reports G. arenaria and G. zamorana for the first time from Hungary, based on morphological examination and phylogenetic analyses of ITS and LSU sequences. The new species Genea budensis sp. nov., found in the Buda Mountains in Hungary, is characterized by a warty, scale-covered surface peridium; spores ornamented with dense, cone-shaped projections, with some of them being blunt-tipped or bud-like in form. This discovery also marks the first documented occurrence of both Genea zamorana and G. arenaria within Hungary. These findings expand the documented diversity and geographic distribution of Genea in Hungary and provide additional morphological and molecular data for future taxonomic studies of the genus.

Diversity

6 November 2026

Maximum likelihood phylogram of the examined isolates of the genus Genea. Bootstrap percentages (BSs) and Bayesian posterior probabilities (BPPs) are shown above branches (BS/BPP). Only values higher than 70 (BS) and 0.95 (BPP) are indicated. Hyphens denote values below the threshold for the corresponding statistic (BS/BPP). H. hemisphaerica and H. cazaresii are used as outgroups. (T) denotes type specimen. The new species and records are highlighted in red font.

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Diversity - ISSN 1424-2818