Chrea National Park, one of the 11 national parks in Algeria, is natural and diverse but under different pressures: urbanisation, fires caused by the high flux of visitors. Several ecological and systematic studies have been conducted on the Araneae, the most important epigeal fauna, but no attention was given to the anthropogenic parcels of the Park. To assess the effects of urbanisation and fires on the ecology of this fauna, spiders were collected monthly for 2 years, using 'Pitfall' traps in three disturbed stations: burned, urbanised and reforested and three natural sites as control. In total, 1,476 specimens were sampled (19 families, 42 genera and 68 species). Zodarion algericum was the dominant species (13.25%), particularly in the burned station. Mann-Whitney U test showed a significant difference between urbanised and nonurbanised sites in contrast to other ones and no significant differences with the control. Our results show that fires transform the forest into a mosaic of habitats, with open gaps of different stages of succession. In addition, the reforestation of cedars without any agricultural practices has no negative effects on the Park. No loss of biodiversity was observed; this would encourage the restoration of the forest to protect its fauna and flora.

中文翻译：

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人为因素对 Chréa 国家公园（阿尔及利亚布利达）蜘蛛群落（节肢动物：Araneae）的影响

Chrea 国家公园是阿尔及利亚的 11 个国家公园之一，自然而多样，但面临着不同的压力：城市化、游客流量大引起的火灾。已经对最重要的表生动物群 Araneae 进行了几项生态和系统研究，但没有注意到公园的人为地块。为了评估城市化和火灾对该动物群生态的影响，在 2 年内每月收集蜘蛛，在三个受干扰的站点使用“陷阱”陷阱：燃烧、城市化和重新造林，以及三个自然地点作为控制。共采集标本1476个（19科42属68种）。Zodarion algericum 是优势种（13.25%），特别是在燃烧站。Mann-Whitney U 检验显示城市化和非城市化地点与其他地点相比存在显着差异，而与对照无显着差异。我们的结果表明，火灾将森林变成了栖息地的马赛克，具有不同演替阶段的开放间隙。此外，在没有任何农业实践的情况下重新造林雪松对公园没有负面影响。没有观察到生物多样性的丧失；这将鼓励恢复森林以保护其动植物群。没有观察到生物多样性的丧失；这将鼓励恢复森林以保护其动植物群。没有观察到生物多样性的丧失；这将鼓励恢复森林以保护其动植物群。