Abstract：
During durst storms, also biological material is transported from arid areas such as the Sahara Desert. In the present work, rain samples containing significant amounts of mineral dust have been collected in Granada during different red rain episodes. Biological features (bacteria, biofilm, pollen grain and fungal spore) as well as size-particle distribution and mineralogical composition were studied by SEM. Nanobacteria were observed for the first time in red rain samples. A preliminary metabarcoding analysis was performed on three red rain samples. Here, Bacillota made up 18 % and Pseudomonadota 23 % of the whole prokaryotic community. The fungal community was characterized by a high abundance of Ascomycota and, dependent on the origin, the presence of Chytridiomycota. By means of 16S rRNA sequencing, 18 cultivable microorganisms were identified. In general, members of the phyla Pseudomonadota and Bacillota made up the majority of taxa. Some species, such as Peribacillus frigoritolerans and Bacillus halotolerans were isolated during three different red rain episodes. Generally, red rain carries a wide variety of microorganisms, being their ecosystem and health effects largely unknown.
摘要：
在暴风雨期间，生物材料也从干旱地区运输，如撒哈拉沙漠。在目前的工作中,在不同的红雨期间，格拉纳达收集了含有大量矿物粉尘的雨水样本。生物学特征(细菌，生物膜，通过SEM研究了花粉粒和真菌孢子）以及粒度分布和矿物学组成。在红雨样品中首次观察到纳米细菌。对三个红雨样品进行了初步的元编码分析。这里,芽孢杆菌占整个原核生物群落的18％，假单胞菌占23％。真菌群落的特征是大量的子囊菌，取决于起源，衣原体的存在。通过16SrRNA测序，鉴定出18种可培养的微生物。总的来说,Pseudomonadota和Bacillota的成员占分类群的大多数。一些物种,例如，在三个不同的红雨事件中分离出了冷热芽孢杆菌和盐芽孢杆菌。一般来说,红色的雨携带着各种各样的微生物，它们的生态系统和健康影响在很大程度上是未知的。
