20.500.12556/DiRROS-18739 Habitat degradation facilitates the invasion of Neophytes a resurvey study based on permanent vegetation plots in oak forests in Slovenia (Europe) The spread of neophytes (non-native plant species) challenges the conservation status and ecological integrity of forests, especially in lowland areas. Long-term resurvey studies are needed to evaluate the temporal dynamics of neophytes in forests; however, such data are scarce. In 2023, we resampled a set of 45 permanent vegetation plots (established in 1992/93) in two forest vegetation types: oak–hornbeam forests dominated by Quercus robur and colline oak–beech forests dominated by Q. petraea. Over the last 30 years, oak forests have experienced extensive oak tree mortality, with the degree of habitat degradation being greater in Q. robur forests. In the early 1990s, only three neophytes with low abundance were recorded across all plots. In the 2023 resurvey, the total number of neophytes increased to 22 species (15 herbaceous and 7 woody species), comprising 6.9% of the total species pool in the understory layer. The increase in the plot-level number and cover of neophytes was significant in plots dominated by Q. robur but not in those with Q. petraea. The most frequent neophytes were Impatiens parviflora (present in 31% of plots), Solidago gigantea (27%), Erigeron annuus (16%) and Erechtites hieraciifolia (16%). The richness and cover of neophytes were significantly affected by the tree layer cover (negative correlation) and the degree of soil disturbance (positive correlation). All neophytes established in disturbed patches, whereas the occurrence of I. parviflora was exceptional as it was able to colonize less degraded, shaded understory environments. Habitat degradation (the mortality-induced loss of stand-forming oak trees resulting in extensive tree layer cover decrease) emerged as a key driver promoting neophyte proliferation, coupled with the impact of management-induced disturbances affecting overstory and soil conditions. The spread is expected to continue or even intensify in the future because novel light regimes and disturbances make forest habitats less resistant to neophyte proliferation. long-term vegetation change invasive non-native plants oak mortality Quercus robur Quercus petraea canopy openness Impatiens parviflora Slovenia dolgoročna sprememba vegetacije invazivne tujerodne rastline odmiranje hrasta Quercus robur Quercus petraea dob graden odprtost krošnje Impatiens parviflora drobnocvetna nedotika Slovenija true false true Angleški jezik Slovenski jezik Neznano 2024-04-19 09:21:04 2024-04-19 09:21:05 2024-05-10 12:32:31 0000-00-00 00:00:00 2024 0 0 Nasl. z nasl. zaslona; Opis vira z dne 2. 4. 2024; str. 1-19 iss. 7 Vol. 13 2024 0000-00-00 Zaloznikova Objavljeno apc 0000-00-00 0000-00-00 0000-00-00 630*4 2223-7747 10.3390/plants13070962 191081987 https://www.mdpi.com/2223-7747/13/7/962 1 638cadd4-fe1d-11ee-ab10-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=25643 RAZ_Kermavnar_Janez_2024.pdf RAZ_Kermavnar_Janez_2024.pdf 1 2520CDF4A4E296C0FD335896028EC3CF b5f67cb81dab3ca22f074978f676bbe4a67c362028e39e2bf8abdca4fed1f9b3 a42d747f-fe1d-11ee-ab10-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=25644 Gozdarski inštitut Slovenije 0 0 0