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Ecological correlates of odonate assemblages of a Mediterranean stream, Wadi Cherf, northeastern Algeria: implications for conservation
International Journal of Odonatology ( IF 1.0 ) Pub Date : 2019-10-02 , DOI: 10.1080/13887890.2019.1688199
Zineb Bouhala 1, 2 , Chakri Khemissa 1, 2 , Joaquín Márquez-Rodríguez 3 , Manuel Ferreras-Romero 3 , Farrah Samraoui 1, 4 , Boudjéma Samraoui 1, 2
Affiliation  

We investigated the odonates of Wadi Cherf, a tributary of Wadi Seybouse, and explored the main environmental factors that may be important drivers of the abundance and diversity of Odonata assemblages. PCA analyses demonstrated a significant altitudinal gradient associated with water flow, temperature, vegetation cover, substrate and adjacent land use. Notably, pollution was a dominant structuring factor and the most widespread species, Ischnura graellsii and the North African endemic Platycnemis subdilatata, were the most pollution-tolerant species. Similarly, co-inertia analysis indicated that environmental factors could account for 70% of the co-variation in shaping odonate assemblages. Equally important, threatened species were associated with less degraded but vulnerable habitats, most susceptible to anthropogenic impacts. There is thus a need to develop monitoring tools to assess the ecological integrity of North African rivers and implement a management plan that considers both connectivity and heterogeneity to ensure that Wadi Cherf, a sanctuary to three threatened species Calopteryx exul (EN), Coenagrion mercuriale (EN) and Gomphus lucasii (VU), continues to provide critical ecosystem functions.

中文翻译:

阿尔及利亚东北部 Wadi Cherf 地中海河流的齿状藻类群落的生态相关性:对保护的影响

我们调查了 Wadi Seybouse 的支流 Wadi Cherf 的齿状藻类,并探索了可能是 Odonata 组合丰富度和多样性的重要驱动因素的主要环境因素。PCA 分析表明,与水流、温度、植被覆盖、基质和相邻土地利用相关的显着海拔梯度。值得注意的是,污染是主要的结构因素,分布最广的物种 Ischnura graellsii 和北非特有的 Platycnemis subdilatata 是最耐污染的物种。类似地,共惯性分析表明,环境因素可以解释 70% 的形成齿状化合物组合的协变。同样重要的是,受威胁物种与退化程度较低但脆弱的栖息地有关,最容易受到人为影响。
更新日期:2019-10-02
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