Doni Lapo, Oliveri Caterina, Lasa Aide, Di Cesare Andrea, Petrin Sara, Martinez-Urtaza Jaime, Coman Frank, Richardson Anthony, Vezzulli Luigi
Department of Earth, Environmental and Life Sciences (DISTAV), University of Genoa, Corso Europa 26, 16132 Genoa, Italy.
Department of Earth, Environmental and Life Sciences (DISTAV), University of Genoa, Corso Europa 26, 16132 Genoa, Italy; Centro de Investigación Mariña da Universidade de Vigo (CIM-UVigo), Departamento de Ecología y Biología Animal, Universidade de Vigo, 36310 Vigo, Spain.
Mar Pollut Bull. 2023 Mar;188:114685. doi: 10.1016/j.marpolbul.2023.114685. Epub 2023 Feb 3.
The Great Barrier Reef (GBR) is the world's largest coral ecosystem and is threatened by climate change. This study investigated the impact of the 2016 Marine Heatwave (MHW) on plankton associated microbial communities along a ∼800 km transect in the GBR. 16S rRNA gene metabarcoding of archived plankton samples collected from November 2014 to August 2016 in this region showed a significant increase in Planctomycetes and bacteria belonging to the genus Vibrio and Synechococcus during and after the heatwave. Notably, Droplet Digital PCR and targeted metagenomic analysis applied on samples collected four months after the MHW event revealed the presence of several potential pathogenic Vibrio species previously associated with diseases in aquatic animals. Overall, the 2016 MHW significantly impacted the surface picoplankton community and fostered the spread of potentially pathogenic bacteria across the GBR providing an additional threat for marine biodiversity in this area.
大堡礁（GBR）是世界上最大的珊瑚生态系统，正受到气候变化的威胁。本研究调查了2016年海洋热浪（MHW）对大堡礁沿约800公里样带的浮游生物相关微生物群落的影响。对2014年11月至2016年8月在该地区采集的存档浮游生物样本进行的16S rRNA基因代谢条形码分析显示，在热浪期间及之后，浮霉菌门以及弧菌属和聚球藻属细菌显著增加。值得注意的是，对热浪事件四个月后采集的样本进行的数字液滴PCR和靶向宏基因组分析揭示了几种先前与水生动物疾病相关的潜在致病弧菌的存在。总体而言，2016年的海洋热浪对表层微微型浮游生物群落产生了重大影响，并促使潜在致病细菌在大堡礁扩散，给该地区的海洋生物多样性带来了额外威胁。
