文献类型：期刊文献

英文题名：Harmful Microalgae Exhibit Broad Environmental Adaptability in High-Salinity Area Across the Dafengjiang River Estuary

作者：Huang, Jiongqing[1,2];Zhao, Huaxian[3];Wang, Weijun[1];Qin, Xinyi[2,3,4];Wang, Pengbin[5];Hou, Qinghua[2,3];Chen, Qingxiang[2,3];Jiang, Gonglingxia[2,3];Dong, Ke[6];Jiang, Tao[7];Pu, Yang[1];Li, Nan[2,3]

机构：[1]Ludong Univ, Sch Agr, Yantai, Peoples R China;[2]Guangdong Ocean Univ, Coll Ocean & Meteorol, Lab Coastal Ocean Variat & Disaster Predict, Zhanjiang, Peoples R China;[3]Guangdong Ocean Univ, Key Lab Climate Resources & Environm Continental S, Dept Educ Guangdong Prov, Zhanjiang, Peoples R China;[4]Nanning Normal Univ, Key Lab Environm Change & Resources Use Beibu Gulf, Minist Educ, Nanning, Peoples R China;[5]Minist Nat Resources, Inst Oceanog 2, Key Lab Marine Ecosyst Dynam, Hangzhou, Peoples R China;[6]Kyonggi Univ, Dept Biol Sci, Suwon, South Korea;[7]Yantai Univ, Sch Ocean, Yantai, Peoples R China

年份：2024

卷号：14

期号：10

外文期刊名：ECOLOGY AND EVOLUTION

收录：SCI-EXPANDED(收录号：WOS:001340115600001)、、Scopus(收录号：2-s2.0-85207674312)、WOS

基金：This work was supported by Guangdong University Innovation Team (Early-warning of marine disasters) (No. 2023KCXTD015), Guangxi Key Research and Development Programme (AB24010109), and Program for Scientific Research Start-up Funds of Guangdong Ocean University. We would like to thank the Analytical and Testing Center of Guangdong Ocean University for environmental parameter analysis.

语种：英文

外文关键词：18S rRNA gene; community-level change points; harmful algal blooms; harmful microalgae; subtropical estuary; TITAN

外文摘要：Harmful algal blooms (HABs) often occur in estuaries due to their unique environmental heterogeneity, posing significant environmental and human health risks. However, there is limited understanding of the community composition and community-level change points (thresholds) of harmful microalgae in subtropical estuaries. This study explored harmful microalgae community structure and thresholds in the Dafengjiang River estuary using a metabarcoding approach. The results revealed 63 harmful microalgae species, and major species included Guinardia flaccida, Prorocentrum cordatum, Thalassiosira punctigera, Pseudo-nitzschia galaxiae and T. gravida. Nonparametric change-point analysis and threshold indicator taxa analysis (TITAN) showed threshold responses of harmful microalgae community structure to ammonium (57.5-60 mu gL-1), total phosphorus (27.8-28.5 mu gL-1) and dissolved inorganic phosphorus (14.5-28 mu gL-1) along the salinity gradient. Wider environmental thresholds were also found in hypersaline areas. Additionally, Pyrodinium bahamense, Pfiesteria piscicida, Skeletonema tropicum and T. punctigera were sensitive to environmental changes and thus could be used as bioindicators. Overall, our study unveiled diverse abrupt transitions of harmful microalgal communities, providing a risk assessment for human health and ecological safety in subtropical estuary ecosystems.