Ezzedine Jade A, Jacas Louis, Desdevises Yves, Jacquet Stéphan
Université Savoie Mont-Blanc, INRAE, CARRTEL, Thonon-les-Bains, France.
CNRS, Biologie Intégrative des Organismes Marins, Observatoire Océanologique, Sorbonne Université, Banyuls-sur-Mer, France.
Front Microbiol. 2020 Feb 14;11:98. doi: 10.3389/fmicb.2020.00098. eCollection 2020.
When considering microbial biotic interactions, viruses as well as eukaryotic grazers are known to be important components of aquatic microbial food webs. It might be the same for bacterivorous bacteria but these groups have been comparatively less studied. This is typically the case of the and like organisms (BALOs), which are obligate bacterial predators of other bacteria. Recently, the abundance and distribution of three families of this functional group were investigated in perialpine lakes, revealing their presence and quantitative importance. Here, a more in-depth analysis is provided for Lake Geneva regarding the diversity of these bacterial predators at different seasons, sites and depths. We reveal a seasonal and spatial (vertical) pattern for BALOs. They were also found to be relatively diverse (especially ) and assigned to both known and unknown phylogenetic clusters. At last we found that most BALOs were positively correlated to other bacterial groups, mainly Gram-negative, in particular (among which many are predators of other microbes). This study is the first shedding light on this potentially important bacterial killing group in a large and deep lake.
在考虑微生物生物相互作用时，病毒以及真核食草动物是水生微生物食物网的重要组成部分，这是已知的。噬细菌的细菌可能也是如此，但对这些群体的研究相对较少。蛭弧菌类生物（BALOs）就是典型例子，它们是专性捕食其他细菌的细菌捕食者。最近，对这个功能群的三个科在阿尔卑斯山周边湖泊中的丰度和分布进行了调查，揭示了它们的存在及其数量重要性。在此，针对日内瓦湖，我们对这些细菌捕食者在不同季节、地点和深度的多样性进行了更深入的分析。我们揭示了BALOs的季节性和空间（垂直）模式。还发现它们相对多样（尤其是蛭弧菌科），并被归入已知和未知的系统发育簇。最后，我们发现大多数BALOs与其他细菌群体呈正相关，主要是革兰氏阴性菌，特别是蛭弧菌科（其中许多是其他微生物的捕食者）。这项研究首次揭示了这个在大型深水湖泊中可能具有重要意义的细菌杀伤群体。
