Chapron Leila, Lartaud Franck, Le Bris Nadine, Peru Erwan, Galand Pierre E
Sorbonne Université, CNRS, Laboratoire d'Ecogéochimie des Environnements Benthiques (LECOB), Banyuls-sur-Mer, France.
Front Microbiol. 2020 Feb 21;11:275. doi: 10.3389/fmicb.2020.00275. eCollection 2020.
Cold-water coral (CWC) ecosystems provide niches and nurseries for many deep-sea species. and , two cosmopolitan species forming three dimensional structures, are found in cold waters under specific hydrological regimes that provide food and reoxygenation. There is now more information about their feeding, their growth and their associated microbiome, however, little is known about the influence of their habitat on their physiology, or on the composition of their bacterial community. The goal of this study was to test if the habitat of and influenced the hosts associated bacterial communities, the corals' survival and their skeletal growth along the slope of a submarine canyon. A transplant experiment was used, based on sampling and cross-redeployment of coral fragments at two contrasted sites, one deeper and one shallower. Our results show that had significantly higher skeletal growth rates in the shallower site and that it had a specific microbiome that did not change between sites. Inversely, had the same growth rates at both sites, but its bacterial community compositions differed between locations. Additionally, transplanted acquired the microbial signature of the local corals. Thus, our results suggest that prefer the shallower habitat.
冷水珊瑚（CWC）生态系统为许多深海物种提供了生态位和育苗场。在特定水文条件下的冷水中发现了两种形成三维结构的世界性物种，这些条件提供了食物和再充氧。现在有更多关于它们的摄食、生长及其相关微生物组的信息，然而，关于它们的栖息地对其生理机能或细菌群落组成的影响却知之甚少。本研究的目的是测试 和 的栖息地是否会影响宿主相关细菌群落、珊瑚的存活以及它们在海底峡谷斜坡上的骨骼生长。基于在两个对比站点（一个较深一个较浅）对珊瑚碎片进行采样和交叉重新部署，进行了一项移植实验。我们的结果表明， 在较浅的站点具有显著更高的骨骼生长速率，并且它具有特定的微生物组，在不同站点之间没有变化。相反， 在两个站点具有相同的生长速率，但其细菌群落组成在不同位置有所不同。此外，移植的 获得了当地珊瑚的微生物特征。因此，我们的结果表明 更喜欢较浅的栖息地。
