CAS Key Laboratory of Marine Ecology and Environmental Sciences, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China.
University of Chinese Academy of Sciences, Beijing 100049, China.
Environ Sci Technol. 2022 Mar 1;56(5):3056-3064. doi: 10.1021/acs.est.1c06502. Epub 2022 Feb 8.
Harmful algal blooms formed by fast-growing, ephemeral macroalgae have expanded worldwide, yet there is limited knowledge of their potential ecological consequences. Here, we select intense green tides formed by in the Yellow Sea, China, to examine the ecological consequences of these blooms. Using 28-isofucosterol in the surface sediment as a biomarker of green algae, we identified the settlement region of massive floating green algae in the area southeast of the Shandong Peninsula in the southern Yellow Sea. The responses of the phytoplankton assemblage from the deep chlorophyll- maximum layer were then resolved using high-throughput sequencing. We found striking changes in the phytoplankton community in the settlement region after an intensive green tide in 2016, characterized by a remarkable increase in the abundance of the pelagophyte , the causative species of ecosystem disruptive brown tides. Our study strongly suggests that the occurrence of massive macroalgal blooms may promote blooms of specific groups of microalgae through alteration of the marine environment.
由快速生长、短暂的大型藻类形成的有害藻华在全球范围内不断扩大，但人们对其潜在生态后果的了解有限。在这里，我们选择中国黄海的 形成的强烈绿潮来研究这些藻华的生态后果。我们使用表层沉积物中的 28-异岩藻甾醇作为绿藻的生物标志物，确定了南黄海山东半岛东南部大面积漂浮绿藻的定居区。然后，我们使用高通量测序解析了来自深层叶绿素最大层的浮游植物组合的响应。我们发现，2016 年强烈绿潮后，定居区的浮游植物群落发生了显著变化，表现为海洋环境改变导致了 pelagophyte （引发生态破坏性褐潮的物种）丰度的显著增加。我们的研究强烈表明，大规模大型藻类藻华的发生可能通过改变海洋环境促进特定微藻群体的爆发。
