中国长江口邻近海域亚历山大藻囊孢的分布。
Distribution of Alexandrium pacificum cysts in the area adjacent to the Changjiang River estuary, China.
机构信息
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.
Changjiang River Estuary Ecosystem Research Station, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China.
出版信息
Mar Pollut Bull. 2020 Jul;156:111206. doi: 10.1016/j.marpolbul.2020.111206. Epub 2020 Apr 30.
The coastal waters adjacent to the Changjiang River estuary (CRE) are characterized by nutrient pollution and recurrent harmful algal blooms. In this study, resting cysts of Alexandrium pacificum Litaker and A. catenella (Whedon & Kof.) Balech, two major species within the A. tamarense species complex in Chinese coastal waters, were studied using sediment samples collected from the area adjacent to the CRE in May 2014 and December 2015. Cysts were detected with two real-time quantitative PCR assays, as well as the primuline-staining method. Only cysts of A. pacificum were found in the study area, which mainly distributed in the mud depositional zone near the CRE. A low-abundance region of the cysts present in spring is in accordance with the intrusive pathway of the Nearshore Kuroshio Branch Current (NKBC), suggesting that A. pacificum blooms could be regulated by seasonal intrusion of NKBC.
毗邻长江口（CRE）的沿海水域以营养物污染和频繁发生的有害藻华为特征。在这项研究中，于 2014 年 5 月和 2015 年 12 月从 CRE 附近采集沉积物样本，研究了中国沿海水域中属于亚历山大藻种复合体的两种主要物种，即太平洋亚历山大藻（Litaker）和链状亚历山大藻（Whedon & Kof.）Balech 的休眠孢囊。使用两种实时定量 PCR 检测法和原花青素染色法检测了孢囊。研究区域仅发现了太平洋亚历山大藻的孢囊，其主要分布在 CRE 附近的泥质沉积区。春季孢囊低丰度区域与近岸黑潮分支流（NKBC）的侵入路径一致，表明太平洋亚历山大藻的爆发可能受到 NKBC 季节性侵入的调节。
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