2023. január 27., péntek
2023. január 18., szerda
Élvonalban - interjú az Egyetemi Életben
2023. január 14., szombat
Új cikk a Forest Ecology and Management-ben
Megjelent legújabb cikkünk Khanh Vo Ho elsőszerzőségével a Forest Ecology and Management szakfolyóiratban. A cikk "faék" egyszerűségű üzenete az, hogy a természetes erdőállományok értékesebbek mint az ültetvények, különösen ha azokat idegenhonos fajokból állítják össze. Számos ilyen jellegű "trivialitás" van , amihez nincs megfelelően hivatkozható és naprakész referencia irodalom, a cikk ezt a hiányt igyekszik orvosolni. A cikk szabadon hozzáférhető a folyóirat honlapján az összefoglalója pedig az alábbiakban olvasható.
Non-native tree plantations are weak substitutes for near-natural forests regarding plant diversity and ecological value
Khanh Vu Ho, György Kröel-Dulay, Csaba Tölgyesi, Zoltán Bátori, Eszter Tanács, Miklós Kertész, Péter Török, László ErdősWhile near-natural forest stands are dramatically diminishing, monoculture tree plantations are rapidly spreading globally, including the eastern part of Central Europe. Tree plantations are regarded as simplified and species-poor ecosystems, but their functional and phylogenetic diversity and ecological value are still mostly unknown. In the present study, we investigated near-natural poplar forests and the three most common tree plantation types (native deciduous Populus alba, non-native evergreen Pinus nigra, and non-native deciduous Robinia pseudoacacia plantations) in the Kiskuns ́ag Sand Ridge, central Hungary. Our aim was to find out how different the species composition of the studied habitats is, how taxonomic, functional, and phylogenetic diversity vary among the four habitat types (i.e., near-natural forests and three types of plantations), and what the ecological value of the studied habitats is. We found that the four habitat types had significantly different species compositions. Although each habitat contained some diagnostic species, near-natural forests had the highest number of diagnostic species. While many of the diagnostic species of near-natural forests were native shrubs, tree plantations had many weeds and non-native herbs as diagnostic species. Near-natural forests had the highest per plot richness of native species and the lowest richness of non-natives. Shannon diversity, functional diversity and phylogenetic diversity were higher in the near-natural forests and two types of plantations (Populus and Pinus) compared to Robinia plantations. Based on naturalness indicator values, near-natural forests were the least degraded and Robinia plantations were the most degraded. Near-natural forests contained the most species of high conservation importance. Overall, near-natural forests proved to be much more valuable from an ecological and conservation perspective than any of the studied plantations; conservation and restoration programs should therefore focus on this type of habitat. Among the plantations, Populus alba plantations are the best substitute option in most respects, although they harbored a relatively high number of non-native species. We suggest that the native Populus alba should be preferred to non-native tree species when plantations are established. In addition, decreasing the extent of Pinus and Robinia plantations is essential on the long run if we aim to maintain the ecological integrity of the region.