Wild boars use a wide range of habitats. Their invasive nature is gaining attention due to the complexity of its impact. The goal of this research is to analyze the impact of the wild boar on the chemical properties of soils in a natural and a post-fire forest in the Edough Forest Massif in Algeria. This study compares the impact of wild boar rooting on soil parameters to determine the functional role of the wild boar. The research was conducted during the winter of 2022. The study sites included a natural forest and a post-fire area. Rooting tracks were geolocated and soil samples were collected. The results show significant differences between rooted and control patches in the chemical parameters measured in the two environments. However, in the natural environment, significant differences were only noted for the calcium content and electrical conductivity. But in the post-fire environment, strong significant differences were observed for all measured parameters, suggesting that wild boars do not exert a noticeable soil homogenization effect on the soil properties. This research highlights the importance of understanding and managing the impact of wild boars in natural and post-fire forests on soil formation processes, the diversity of soil properties, and their magnitude.

Spiders, as predatory arthropods, play essential roles in ecosystem equilibrium and serve as bioindicators. To contribute to the understanding of spider diversity in northeast Algeria (Annaba province), a survey of spider fauna was conducted in both forest and urban sites over two consecutive years using the "hand collecting" method. A total of 879 adult spiders (681 females and 198 males) were identified, representing 25 families and 67 species. The Salticid Plexippus paykulli (Audouin, 1826) was the most abundant species, with 127 specimens collected. The most abundant families were Salticidae and Araneidae, with counts of 171 and 139 individuals, respectively. The Shannon-Weaver index varied from 2.17 to 3.68 bits across the different sites, while evenness values ranged from 0.60 to 0.75. This study significantly expanded the known spider species in Annaba province from 96 to 138.

Trachymela sloanei (Blackburn, 1897) (Coleoptera: Chrysomelidae: Chrysomelinae), a leaf beetle native to Australia and recognized as a defoliator of Eucalyptus spp. (Myrtaceae), is reported for the first time from Algeria and the African continent. In May 2025, 20 adults were collected from Eucalyptus camaldulensis in the urban area of Sidi Amar (Annaba, northeastern Algeria), where characteristic foliar damage and feeding traces were observed. Identification was confirmed using diagnostic morphological characters. Field evidence indicates a reproducing population actively feeding on ornamental Eucalyptus trees. Considering its invasive history elsewhere, this detection highlights the risk of further spread and potential impacts on Eucalyptus plantations and urban greenery in North Africa. The present record expands the known distribution of T. sloanei and underscores the need for continued surveillance of Eucalyptus-associated pests in the Mediterranean region.

Urban expansion across Algeria is bringing humans into contact with wildlife. Yet, the wild boar (Sus scrofa), a native but increasingly hyperabundant component of the Maghrebian fauna, remains largely undocumented in urban settings. Wild boar exploits forest-edge resources, generating a novel human–wildlife interface whose social perception remains poorly characterized outside Europe. We provide an exploratory socio-ecological assessment of this emerging interface in Annaba, Algeria. A public survey of 250 residents was conducted to document spatial patterns of incursions and perceptions. A six-month nocturnal monitoring protocol was implemented. Results show that there are substantial differences in the Sectors examined: in Sector 3, 68% of residents observed wild boar, whereas no sightings were reported in Sector 1. Multivariate analyses indicate that wild boar presence is strongly associated with proximity to the Edough Forest, availability of anthropogenic food resources and corridors linking forest to residential areas. Field monitoring revealed an almost exclusively nocturnal activity rhythm and a pronounced seasonal increase in the relative abundance index. Among respondents who expressed an opinion, perceptions were predominantly negative, shaped by fear, perceived danger, and hygiene concerns. These findings demonstrate the emergence of a new human–wildlife interface in Algeria and emphasize the need for improved waste management, targeted habitat interventions, and long-term ecological monitoring to mitigate escalating urban conflicts involving wild boar.