Evolutionary Genomics Group, Departamento de Producción Vegetal y Microbiología, Universidad Miguel Hernández, San Juan de Alicante, Alicante, Spain.
Sci Rep. 2012;2:490. doi: 10.1038/srep00490. Epub 2012 Jul 3.
Coastal lagoons, both hypersaline and freshwater, are common, but still understudied ecosystems. We describe, for the first time, using high throughput sequencing, the extant microbiota of two large and representative Mediterranean coastal lagoons, the hypersaline Mar Menor, and the freshwater Albufera de Valencia, both located on the south eastern coast of Spain. We show there are considerable differences in the microbiota of both lagoons, in comparison to other marine and freshwater habitats. Importantly, a novel uncultured sulfur oxidizing Alphaproteobacteria was found to dominate bacterioplankton in the hypersaline Mar Menor. Also, in the latter prokaryotic cyanobacteria were almost exclusively comprised by Synechococcus and no Prochlorococcus was found. Remarkably, the microbial community in the freshwaters of the hypertrophic Albufera was completely in contrast to known freshwater systems, in that there was a near absence of well known and cosmopolitan groups of ultramicrobacteria namely Low GC Actinobacteria and the LD12 lineage of Alphaproteobacteria.
滨海泻湖，无论是高盐度还是淡水，都很常见，但仍属于研究不足的生态系统。我们首次使用高通量测序描述了两个大型且具有代表性的地中海滨海泻湖——高盐度的马略卡岛湖和淡水的巴伦西亚泻湖——的现有微生物群。与其他海洋和淡水生境相比，我们发现这两个泻湖的微生物群存在相当大的差异。重要的是，一种新型的未培养硫氧化α-变形菌被发现主导着高盐度马略卡岛湖的浮游细菌。此外，在后一种原核生物中，蓝细菌几乎完全由聚球藻属组成，而没有发现聚磷菌属。值得注意的是，富营养化的巴伦西亚泻湖的淡水微生物群落与已知的淡水系统完全相反，因为那里几乎没有众所周知的、广泛分布的超微细菌群落，即低 GC 放线菌和α-变形菌的 LD12 谱系。
