Temporary rivers are dynamic freshwater ecosystems, supporting unique and often highly diverse terrestrial communities in the riparian habitats during the flowing phase. However, studies investigating the differences in orthopteran and cockroach (Insecta: Orthoptera, Blattodea) assemblages between riparian and adjacent upland habitats are scarce, despite their abundance and functional importance in terrestrial ecosystems. Orthopterans and cockroaches were sampled in 2014 at 72 sites along the temporary Krcic River (SE Croatia) in two habitat types—riparian and karst, using pitfall traps. Abundance, taxa richness, true diversity and conservation value of ground-dwelling orthopterans and cockroaches were significantly higher in the karst than in the riparian habitat. This result can be ascribed to significant differences in environmental factors: soil temperature, air humidity and vegetation structure, namely tree, shrub and herb layer abundances. Most assemblage parameters and spatial distribution of ground-dwelling orthopteran and cockroach taxa were driven by higher soil temperature and less developed tree layer in the karst, both groups preferring open habitats. Karst sites with a well-developed shrub layer and herb layer had the highest conservation value for rare ground-dwelling orthopterans (e.g. Paramogoplistes novaki) and locally rare cockroaches (e.g. Ectobius balcani), respectively. Nevertheless, densely vegetated riparian sites also harboured some locally valuable species (e.g. Troglophilus cavicola). This study highlights the importance of open karst habitats in promoting the diversity of ground-dwelling orthopterans and cockroaches, and contributes to the understanding of key environmental factors driving their habitat choice, as a prerequisite for efficient conservation and monitoring.

中文翻译：

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开放的喀斯特栖息地促进了临时河流沿岸地栖直翅目昆虫和蟑螂（昆虫纲：直翅目、蚱蜢）的多样性

临时河流是动态的淡水生态系统，在流动阶段支持河岸栖息地中独特且通常高度多样化的陆地群落。然而，关于直翅目和蟑螂（昆虫纲：直翅目、蚱蜢）组合在河岸和邻近的高地栖息地之间的差异的研究很少，尽管它们在陆地生态系统中的数量和功能很重要。2014 年，在临时 Krcic 河（克罗地亚东南部）沿线的 72 个地点对直翅目昆虫和蟑螂进行了采样，这些地点采用陷阱陷阱，分为河岸和喀斯特两种栖息地类型。喀斯特地栖直翅目昆虫和蟑螂的丰富度、类群丰富度、真实多样性和保护价值显着高于河岸栖息地。这一结果可以归因于环境因素的显着差异：土壤温度、空气湿度和植被结构，即乔木、灌木和草本层的丰度。地栖直翅目和蟑螂类群的大多数组合参数和空间分布是由较高的土壤温度和喀斯特不发达的树层驱动的，这两个群体都喜欢开阔的栖息地。灌木层和草本层发育良好的喀斯特地点分别对稀有地栖直翅目昆虫（如 Paramogoplistes novaki）和当地稀有蟑螂（如 Ectobius balcani）具有最高的保护价值。尽管如此，植被茂密的河岸地点也拥有一些当地有价值的物种（例如 Troglophilus cavicola）。这项研究强调了开放的喀斯特栖息地在促进地栖直翅目昆虫和蟑螂多样性方面的重要性，