Pearman J K, Kürten S, Sarma Y V B, Jones B H, Carvalho S
King Abdullah University of Science and Technology (KAUST), Red Sea Research Center (RSRC), Biological and Environmental Sciences & Engineering Division (BESE), Thuwal, 23955-6900, Saudi Arabia
King Abdullah University of Science and Technology (KAUST), Red Sea Research Center (RSRC), Biological and Environmental Sciences & Engineering Division (BESE), Thuwal, 23955-6900, Saudi Arabia.
FEMS Microbiol Ecol. 2016 Mar;92(3). doi: 10.1093/femsec/fiw002. Epub 2016 Jan 5.
The diversity of microbial plankton has received limited attention in the main basin of the Red Sea. This study investigates changes in the community composition and structure of prokaryotes and eukaryotes at the extremes of the Red Sea along cross-shelf gradients and between the surface and deep chlorophyll maximum. Using molecular methods to target both the 16S and 18S rRNA genes, it was observed that the dominant prokaryotic classes were Acidimicrobiia, Alphaproteobacteria and Cyanobacteria, regardless of the region and depth. The eukaryotes Syndiniophyceae and Dinophyceae between them dominated in the north, with Bacillariophyceae and Mamiellophyceae more prominent in the southern region. Significant differences were observed for prokaryotes and eukaryotes for region, depth and distance from shore. Similarly, it was noticed that communities became less similar with increasing distance from the shore. Canonical correspondence analysis at the class level showed that Mamiellophyceae and Bacillariophyceae correlated with increased nutrients and chlorophyll a found in the southern region, which is influenced by the input of Gulf of Aden Intermediate Water.
在红海主盆地，微生物浮游生物的多样性受到的关注有限。本研究调查了红海极端区域沿陆架梯度以及在表层和深层叶绿素最大值之间原核生物和真核生物群落组成和结构的变化。使用针对16S和18S rRNA基因的分子方法，观察到无论区域和深度如何，主要的原核生物类群为酸微菌纲、α-变形菌纲和蓝细菌纲。真核生物中，合沟藻纲和甲藻纲在北部占主导地位，而硅藻纲和小球藻纲在南部地区更为突出。在原核生物和真核生物中，观察到区域、深度和离岸距离存在显著差异。同样，人们注意到，群落与海岸距离增加时相似度降低。在纲水平上的典范对应分析表明，小球藻纲和硅藻纲与南部地区发现的营养物质和叶绿素a增加相关，这受到亚丁湾中层水输入的影响。
