CAS Key Laboratory of Marine Ecology and Environmental Sciences, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China.
Functional Laboratory of Marine Ecology and Environmental Science, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266237, China.
Int J Environ Res Public Health. 2021 Nov 6;18(21):11637. doi: 10.3390/ijerph182111637.
Many species are cosmopolitan harmful algal bloom (HAB) species that have caused huge economic and ecological damage. Despite extensive research on species, the biodiversity and spatial-temporal dynamics of these species remain obscure. Jiaozhou Bay is an ideal area for HAB research, being one of the earliest marine survey areas in China. In this study, we carried out the first metabarcoding study on the temporal and spatial dynamics of species using the 18S rDNA V4 region as the molecular marker and samples collected monthly at 12 sampling sites in Jiaozhou Bay in 2019. Two harmful species ( and ) were identified with potentially high genetic diversity (although we cannot rule out the possibility of intra-genome sequence variations). Both and demonstrated strong temporal preference with a sharp peak of abundance in early autumn (September), but without showing strong location preference in Jiaozhou Bay. Our results revealed that temperature might be the main driver for their temporal dynamics. Knowledge of biodiversity and spatial-temporal dynamics of the species may shed light on the understanding of mechanisms underlying strongly biased occurrences of blooms recorded globally.
许多物种是世界性的有害藻华（HAB）物种，它们造成了巨大的经济和生态破坏。尽管对这些物种进行了广泛的研究，但它们的生物多样性和时空动态仍然不清楚。胶州湾是进行 HAB 研究的理想区域，是中国最早进行海洋调查的地区之一。在这项研究中，我们使用 18S rDNA V4 区域作为分子标记，对 2019 年胶州湾 12 个采样点每月采集的样本进行了时空动态的 18S rDNA V4 区域的元条形码研究。鉴定出两种有害物种（和），它们具有潜在的高遗传多样性（尽管我们不能排除基因组内序列变异的可能性）。和都表现出强烈的时间偏好，在初秋（9 月）有一个明显的丰度高峰，但在胶州湾没有表现出强烈的位置偏好。我们的结果表明，温度可能是它们时间动态的主要驱动因素。了解这些物种的生物多样性和时空动态，可能有助于理解全球记录的强烈偏生藻华的发生机制。
