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https://doi.org/10.48027/hnb.45.073

Ground beetle (Coleoptera: Carabidae) taxocoenoses from high-altitude Pinus peuce and Pinus heldreichii forests in Bulgaria


Rumyana Kostova https://orcid.org/0000-0002-8119-3275; Rostislav Bekchiev https://orcid.org/0000-0001-6143-0184

3 July 2023 · volume 45 · (issue 7) · pp. 187–196 · PDF [full text]

Abstract: The sensitivity of ground beetles to changing habitat conditions makes them a good indicator of environmental change. The shift in their distribution could be used as an early warning signal for natural disturbances due to climate change. To reflect and monitor these changes, initial information is needed on carabid taxa in different high-altitude habitats, including the endemic and climate-sensitive tertiary relict coniferous forests of Pinus peuce (Macedonian pine) and Pinus heldreichii (Bosnian pine). Data on the carabid beetles in the different coniferous habitats in Bulgaria are scattered in various faunistic or taxonomic publications, and there is no exact information about their taxocoenoses in the Macedonian and Bosnian pine habitats. The present study aims to clarify the species composition and diversity patterns of ground beetles in these habitats in Bulgaria. Six sample sites were selected: five natural forest stands in the Rila Mts and Pirin Mts and one forest plantation in the Vitosha Mts. A total of 18 species and subspecies typical of forest habitats were recorded. Five of them were endemic to Bulgaria and five to the Balkan Peninsula. The most common species and the eudominant in the majority of the sample sites was Calathus metallicus aeneus. The exception was one of the Bosnian pine sample sites. Here, the dominant species was Xenion ignitum. The ground beetle species found in the studied forests were mostly zoophagous, mainly crevice or burrowing stratobionts in leaf litter, rocks and soil, a few epigeobionts, one botrobiont and one mixophytophagous geohrotobiont. The classification of the carabid taxocoenoses according to their qualitative composition showed two main clusters: the first being the carabids from the studied sites of the Vitosha and Rila Mts, and the second being the taxocoenoses from the Pirin Mts. The Bosnian pine habitats provide more favourable conditions for the high-altitude ground beetles, where they are in a state of equilibrium with higher species richness and evenness compared to those inhabiting the Macedonian pine forests. The forest communities of Pinus peuce and Pinus heldreichii in Bulgaria are of high conservation importance for the ground beetle and an even higher level of protection of these habitats is required.

Keywords: Balkan Peninsula, biodiversity, Bosnian pine, Bulgaria, endemics, ground beetles, Macedonian pine, relicts

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Kostova R., Bekchiev R. 2023 Ground beetle (Coleoptera: Carabidae) taxocoenoses from high-altitude Pinus peuce and Pinus heldreichii forests in Bulgaria. Historia naturalis bulgarica 45: 187–196.

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