Abbassen R.1, Derridj A.1, Krouchi F.1, Hava J.2, Chakali G.3 2022. Diversity of ground beetles in Tikjda forest, Algeria // Euroasian Entomological Journal. Vol.21. No.2: 61–71 [in English].
1 Laboratoire de production, amylioration et protection des vygytaux et des denryes alimentaires, Faculty des Sciences Biologiques et des Sciences Agronomiques, University Mouloud Mammeri, Tizi-Ouzou, BP 17 RP 15000 Algerie. E-mail: firstname.lastname@example.org
2 Forestry and Game Management Research Institute, Strnady 136, 02 Praha 5 – Zbraslav CZ-252 Czech Republic. E-mail: email@example.com ORCID ID: 0000-0001-8076-9538.
3 Ecole Nationale Supyrieure Agronomique, El-Harrach 16200 Algérie.
ABSTRACT. This paper presents the first data concerning the ground beetles assemblages associated with Pinus nigra mauretanica (Maire & Peyerimhoff, 1927) reserve, Djurdjura southerner, Algeria. Carabids were sampled from two sites which differ in their structural vegetation, site No. 2 being more disturbed and more open than site No. 1. As a result of this survey, 231 carabid beetles belonging to 32 species were collected, of which 53.12 % were common to both sites, while 37.50 % and 9.37 % were restricted to site No. 1 and site No. 2 respectively. Diversity indexes were higher in site No. 1. Statistical analysis showed a significant influence of vegetation type on the specific richness of carabid beetles. Disturbances and structural habitat parameters seem to be the major drivers structuring ground beetles assemblages and influencing species abundance, diversity and richness. Carabid richness and abundance in the studied area are lower in disturbed environments and higher when the forest vegetation cover is developed. Adaptive parameters of species, such as diet and seasonal distribution, showed that 57 % of the species (174 individuals) caught are predatory. Two activity periods of ground beetles were noted, the first one occurred in spring and early summer while the second was mainly autumnal. Our results showed the efficiency of pitfall trapping with 70 % of captured individuals and 38 % of carabid species. Among these taxa recorded in the two sites of Pinus nigra mauretanica reserve, six species have protected status in Algeria, Carabus (Macrothorax) morbillosus, Eurycarabus famini, Laemostenus algerinus, Calosoma inquisitor, Calosoma sycophanta and Sphodrus leucophthalmus, and four were endemic to North Africa, Calathus fuscipes algiricus, Calathus opacus, Carabus (Macrothorax) morbillosus and Bembidion fluviatile unctulum. According to the IUCN categories, four species are in danger of extinction, Sphodrus leucophthalmus, Chlaenius velutinus, Bembidion fluviatile unctulum and Brachinus sclopeta, four are very rare but without current endangerment, Agonum nigrum, Harpalus attenuates, Notiophilus biguttatus and Trechus obtusus, and two were strongly endangered, Calosoma inquisitor and Calosoma sycophanta. Three bioindicator species of forest quality were found, Calathus opacus, Carabus (Macrothorax) morbillosus and Notiophilus biguttatus.
KEY WORDS: Carabidae, diversity, seasonality, distribution, Tigounatine, forest, Algeria.