Nadobnica alpejska Rosalia alpina (L.) (Coleoptera: Cerambycidae) w Nadleśnictwie Łosie (SE Polska) — rozsiedlenie, wybrane aspekty ekologii, zagrożenia i ochrona gatunku
Jakub Michalcewicz , Anna Ilek , Joanna Szafarska , Adrian Wach
AbstractThe study aimed at collecting the data on the distribution, certain aspects of the ecology, as well as at presenting the threats and proposals related to protection of the Rosalia longicorn Rosalia alpina (L.), a very rare native representative of longhorn beetles Cerambycidae, in the Forest Division of Łosie (the Carpathians, SE Poland), which is a part of the Regional Directorate of State Forests in Cracow. The data were collected based on the author’s own observations, the literature data and oral information. Field studies were carried out between 1991 and 2011. The first information on the occurrence of R. alpina in the area currently situated within the boundaries of the Forest Division of Łosie come from the mid-20th century. Most of the collected data on the species occurrence come from the period of 1989–2011, when the species had been recorded in the aforementioned area every year. The occurrence of R. alpina during that period was recorded mainly in the southern part of the Forest Division (Fig. 1). Imagines are mostly recorded in July and August. They are encountered i.a. on stacked wood, lying trees, standing dead tree trunks and stumps. In trophic terms, R. alpina in the studied area is connected with common beech Fagus sylvatica (Fig. 2, 3). A considerable amount of dead beech wood in the studied area creates favourable conditions for the development of this longhorn beetle, whereas the forest stands of the Forest Division of Łosie constitute an important refuge for the species in the Polish Carpathians. The threats to Rosalia longicorn in the described area are related to forestry in beech forest stands. Due to removal of old dying and already dead trees, as well as their parts, nutritional resources of the insect are being depleted. Stacked wood gathered in summer in forest stands, which is destined for subsequent removal and transportation, attract imagines that colonize the wood. Measures aiming at protection of R. alpina in the described area should be focused on maintaining the species habitats in good condition, particularly in forest areas where the species occurrence was recorded (Fig. 1). It is important to leave very old trees, as well as old trees partially dying and already dead in forest places with good insolation. It is necessary to ensure the continuity of the presence of older age classes in the forest canopy, as well as the continuity of forest regeneration in time and space. It is very important not to leave in summer the beech wood (stacked wood, large-size wood) in forest stands where the species presence was confirmed, but also in their vicinity. It seems appropriate to include parts of the forest stands with habitats of R. alpina in the protection programme in the form of nature reserves, or at least to exclude them from economic exploitation. It is necessary to monitor this species within the whole area of the Forest Division of Łosie.
|Other language title versions||Rosalia longicorn Rosalia alpina (L.) (Coleoptera: Cerambycidae) in the Forest Division of Łosie (SE Poland) — distribution, certain aspects of ecology, threats and species conservation|
|Journal series||Acta Agraria et Silvestria series Silvestris, ISSN 0065-0927, (B 1 pkt)|
|Publication size in sheets||0.5|
|Keywords in Polish||Coleoptera, Cerambycidae, Rosalia alpina, ekologia, ochrona owadów, Karpaty, Beskid Niski|
|Keywords in English||Coleoptera, Cerambycidae, Rosalia alpina, ecology, protection of insects, Carpathians, Beskid Niski Mts.|
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