Microbial signatures of protected and impacted Northern Caribbean reefs: changes from Cuba to the Florida Keys
Microbial signatures of protected and impacted Northern Caribbean reefs: changes from Cuba to the Florida Keys
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DOI：
10.1111/1462-2920.14870
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发表时间：
2019-12-11
影响因子：
5.1
通讯作者：
Apprill, Amy
中科院分区：
文献类型：
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作者：
Weber, Laura;Gonzalez-Diaz, Patricia;Apprill, Amy
有几个基线珊瑚礁系统可用于了解健康珊瑚礁及其周围海水的微生物学。在这里，我们研究了25个北方加勒比海珊瑚礁的海水微生物生态学不同的人类影响和保护在古巴和佛罗里达群岛，美国，通过测量营养浓度，微生物丰度，呼吸速率以及测序细菌和古细菌扩增子和社区功能基因。总体而言，海水微生物组成和生物地球化学的影响礁的位置和水文地理。来自古巴Jardines de la Reina的高度保护的“皇冠上的宝石”近海珊瑚礁的海水具有低浓度的营养物质和有机碳，丰富的原绿球藻和高微生物群落α多样性。来自古巴Los Canadios保护较少的系统的海水具有较高的微生物群落β多样性，而来自佛罗里达礁群中受影响最大的近岸珊瑚礁的沃茨含有高有机碳和氮浓度以及微生物化珊瑚礁的潜在微生物功能特征。每个珊瑚礁系统有不同的微生物签名，在这种情况下，我们建议的保护和海上性质的Jardines de la Reina可能会保留贫营养的范例和代谢依赖的社会初级生产的picocyanobacteria。
There are a few baseline reef-systems available for understanding the microbiology of healthy coral reefs and their surrounding seawater. Here, we examined the seawater microbial ecology of 25 Northern Caribbean reefs varying in human impact and protection in Cuba and the Florida Keys, USA, by measuring nutrient concentrations, microbial abundances, and respiration rates as well as sequencing bacterial and archaeal amplicons and community functional genes. Overall, seawater microbial composition and biogeochemistry were influenced by reef location and hydrogeography. Seawater from the highly protected 'crown jewel' offshore reefs in Jardines de la Reina, Cuba had low concentrations of nutrients and organic carbon, abundant Prochlorococcus, and high microbial community alpha diversity. Seawater from the less protected system of Los Canarreos, Cuba had elevated microbial community beta-diversity whereas waters from the most impacted nearshore reefs in the Florida Keys contained high organic carbon and nitrogen concentrations and potential microbial functions characteristic of microbialized reefs. Each reef system had distinct microbial signatures and within this context, we propose that the protection and offshore nature of Jardines de la Reina may preserve the oligotrophic paradigm and the metabolic dependence of the community on primary production by picocyanobacteria.