Menail Aimen, Scharf Burkhard, Amarouayache Mounia
1Marine Bioresources Laboratory, Annaba University Badji Mokhtar, BP12 El-Hadjar, Annaba 23002, Algeria. .
2Ellhornstr. 21, 28195 Bremen, Germany. .
Zootaxa. 2023 Jan 10;5227(5):501-530. doi: 10.11646/zootaxa.5227.5.1.
Between 2017 and 2018, in order to complete the list of the Algerian freshwater ostracods, 62 water bodies were sampled across the Sahara and the semi-arid High Plains. The physico-chemical parameters (salinity, temperature and pH) were measured, and the coordinates of the sites, their surface area and altitude were also recorded. A total of 24 ostracod species were identified, belonging to 4 different families (Darwinulidae, Ilyocyprididae, Cyprididae and Cytherideidae). The maximum number of species in a single site was six. The most common species was Heterocypris incongruens (24 records). Three species are new to Algeria: Darwinula stevensoni, Oncocypris muelleri and Candelacypris aragonica. The ecology of the new and the most common species is discussed. Moreover, in order to evaluate the relationship between the distribution of ostracods and environmental parameters (pH, salinity and temperature), a canonical correspondence analysis (CCA) was performed. The first two axes of the CCA diagram explain 92.97% of the cumulative variance of the relationship between species and physico-chemical parameters of the sites.
2017年至2018年期间，为了完善阿尔及利亚淡水介形虫名录，在撒哈拉沙漠和半干旱的高平原地区对62个水体进行了采样。测量了理化参数（盐度、温度和pH值），并记录了采样点的坐标、表面积和海拔高度。共鉴定出24种介形虫，分属于4个不同科（达尔文介科、土菱介科、金星介科和丽星介科）。单个采样点的物种数量最多为6种。最常见的物种是异形异星介（记录到24次）。有3个物种是阿尔及利亚首次发现：史蒂文森达尔文介、米勒瘤背金星介和阿拉贡烛光丽星介。文中讨论了新发现物种和最常见物种的生态特征。此外，为了评估介形虫分布与环境参数（pH值、盐度和温度）之间的关系，进行了典范对应分析（CCA）。CCA图的前两个轴解释了物种与采样点理化参数之间关系累积方差的92.97%。
