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The diversity of coral associated bacteria and the environmental factors affect their community variation

机译：珊瑚相关细菌的多样性和环境因素影响其群落变异

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摘要

Coral associated bacterial community potentially has functions relating to coral health, nutrition and disease. Culture-free, 16S rRNA based techniques were used to compare the bacterial community of coral tissue, mucus and seawater around coral, and to investigate the relationship between the coral-associated bacterial communities and environmental variables. The diversity of coral associated bacterial communities was very high, and their composition different from seawater. Coral tissue and mucus had a coral associated bacterial community with higher abundances of Gammaproteobacteria. However, bacterial community in seawater had a higher abundance of Cyanobacteria. Different populations were also found in mucus and tissue from the same coral fragment, and the abundant bacterial species associated with coral tissue was very different from those found in coral mucus. The microbial diversity and OTUs of coral tissue were much higher than those of coral mucus. Bacterial communities of corals from more human activities site have higher diversity and evenness; and the structure of bacterial communities were significantly different from the corals collected from other sites. The composition of bacterial communities associated with same coral species varied with season's changes, geographic differences, and coastal pollution. Unique bacterial groups found in the coral samples from more human activities location were significant positively correlated to chemical oxygen demand. These coral specific bacteria lead to coral disease or adjust to form new function structure for the adaption of different surrounding needs further research.
机译：珊瑚相关的细菌群落可能具有与珊瑚健康，营养和疾病有关的功能。采用无培养物的基于16S rRNA的技术来比较珊瑚周围的珊瑚组织，粘液和海水的细菌群落，并研究与珊瑚相关的细菌群落与环境变量之间的关系。珊瑚相关细菌群落的多样性非常高，其组成与海水不同。珊瑚组织和粘液具有与珊瑚有关的细菌群落，其中丙种细菌菌的丰度更高。然而，海水中的细菌群落具有较高的蓝细菌含量。在同一珊瑚碎片中，在粘液和组织中还发现了不同的种群，与珊瑚组织相关的丰富细菌种类与在珊瑚粘液中发现的细菌种类非常不同。珊瑚组织的微生物多样性和OTUs远高于珊瑚黏液。来自更多人类活动场所的珊瑚细菌群落具有更高的多样性和均匀性;而且细菌群落的结构与从其他地点收集的珊瑚明显不同。与同一珊瑚物种相关的细菌群落组成随季节的变化，地理差异和沿海污染而变化。在更多人类活动地点的珊瑚样本中发现的独特细菌群与化学需氧量显着正相关。这些特定于珊瑚的细菌会导致珊瑚病或进行调节以形成新的功能结构，以适应不同的周围环境，需要进一步研究。

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