The diversity of haloarchaea associated with different dry salt lakes in northeastern Algeria was investigated together with their potential of hydrolytic enzyme production. A total of 68 aerobic halophilic archaea were isolated from saline sediments. Based on the 16S rRNA gene sequencing, the isolates were assigned to seven phylotypes within the class Halobacteria, namely Haloarcula, Halococcus, Haloferax, Halogeometricum, Haloterrigena, Natrialba, and Natrinema. The results showed that Haloferax group was found to be dominant in all samples (30 isolates) (44%) with high diversity, followed by Halococcus spp. (13%) (9 isolates). All phylotypes are extreme halophiles and thermotolerant with the ability to grow at temperatures up to 48 °C. In addition, the screening for extracellular halophilic enzymes showed that 89.7% of the isolates were able to produce at least two types of the screened enzymes. The strains producing esterase, gelatinase, inulinase, cellulase and protease activities were the most diverse functional group. These data showed an abundant and diverse haloarchaeal community, detected in Algerian wetland ecosystems, presenting a promising source of molecules with important biotechnological applications.

研究了与阿尔及利亚东北部不同干盐湖有关的盐生古生物的多样性及其水解酶的潜力。从盐沉积物中分离出总共68个有氧嗜盐古细菌。基于16S rRNA基因测序，菌株被分配到班级在七个种系型嗜盐菌，即Haloarcula，Halococcus，沃，Halogeometricum，Haloterrigena，Natrialba，和Natrinema。结果表明，在所有样本（30个分离株）（占总样本的44％）中，Haloferax组具有较高的多样性，其次是嗜盐菌spp。（13％）（9株）。所有系统型都是极端嗜盐菌，并且具有耐热性，能够在高达48°C的温度下生长。另外，对细胞外嗜盐酶的筛选显示出89.7％的分离物能够产生至少两种类型的筛选酶。产生酯酶，明胶酶，菊粉酶，纤维素酶和蛋白酶活性的菌株是最多样化的官能团。这些数据表明，在阿尔及利亚湿地生态系统中发现了丰富多样的盐生古生物群落，为重要的生物技术应用提供了有希望的分子来源。