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Zhang H, Wang N, Zhang D, Wang F, Xu S, Ding X, Xie Y, Tian J, Li B, Cui Z, Jiang T. Composition and temporal dynamics of the phytoplankton community in Laizhou Bay revealed by microscopic observation and rbcL gene sequencing. MARINE ENVIRONMENTAL RESEARCH 2024; 202:106734. [PMID: 39244953 DOI: 10.1016/j.marenvres.2024.106734] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/29/2024] [Revised: 08/15/2024] [Accepted: 09/02/2024] [Indexed: 09/10/2024]
Abstract
Laizhou Bay, a major breeding ground for economic marine organisms in the northern waters of China, is facing rapid environmental degradation. In this study, field surveys in this area were conducted in the spring, summer, and autumn of 2020. Microscopic observation and RuBisCO large subunit (rbcL) gene analysis were employed to understand the community structure and temporal dynamics of phytoplankton. The phytoplankton community structures detected by the two methods showed significant differences. Microscopic observation revealed the dominance of dinoflagellates in spring that shifted to the dominance of diatoms in summer and autumn. However, rbcL gene sequencing consistently identified diatoms as dominant throughout all three seasons, with their relative abundance showing an increasing trend. Conversely, the relative abundance of the second- and third-most abundant taxa, namely, haptophytes and ochrophytes, decreased as the seasons transitioned. rbcL gene sequencing annotated more species than microscopy. It could detect haptophytes and cryptophytes, which were overlooked by microscopy. In addition, rbcL gene sequencing detected a remarkable amount of Thalassiosira profunda, which was previously unidentified in this sea area. However, it appeared to underestimate the contribution of dinoflagellates considerably, with most taxa being only identified through microscopic identification. The two methods jointly identified 28 harmful algal bloom taxa with similar detection quantities but substantial differences in species composition. Phytoplankton communities were influenced by temperature, salinity, and nutrients. The results of this work suggest that a combination of multiple techniques is necessary for a comprehensive understanding of phytoplankton.
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Affiliation(s)
- Huihui Zhang
- School of Oceanography, Yantai University, Yantai, 264005, China
| | - Nan Wang
- School of Oceanography, Yantai University, Yantai, 264005, China
| | - Di Zhang
- School of Oceanography, Yantai University, Yantai, 264005, China
| | - Fei Wang
- Shandong Marine Resource and Environment Research Institute, Yantai, 264006, China
| | - Shiji Xu
- Yantai Ocean Center, Ministry of Natural Resources, Yantai, 264006, China
| | - Xiaokun Ding
- School of Oceanography, Yantai University, Yantai, 264005, China
| | - Yixuan Xie
- Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao, 266071, China
| | - Jinghuan Tian
- School of Oceanography, Yantai University, Yantai, 264005, China
| | - Bin Li
- Shandong Marine Resource and Environment Research Institute, Yantai, 264006, China
| | - Zhengguo Cui
- Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao, 266071, China.
| | - Tao Jiang
- School of Oceanography, Yantai University, Yantai, 264005, China.
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Li H, Li S, Zhang M, Li X, Xu Z, Ma H, Liang S, Song D, Li J, Ma Y, Qin H, Ji D. Typhoon-induced stormwater drives nutrient dynamics and triggers phytoplankton blooms in Laizhou Bay, China. MARINE ENVIRONMENTAL RESEARCH 2024; 198:106473. [PMID: 38676969 DOI: 10.1016/j.marenvres.2024.106473] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/17/2024] [Revised: 03/13/2024] [Accepted: 03/21/2024] [Indexed: 04/29/2024]
Abstract
In this study, we investigated the hydrological and ecological impacts of heavy rainfall caused by the storm Rumbia and Typhoon Lekima on Laizhou Bay (LZB) through land‒sea synchronous field surveys, online remote sensors, and simulated enclosure experiments. Within two weeks of Rumbia, approximately 9% and 16% of the annual riverine total nitrogen (TN) and total phosphorus (TP) fluxes, respectively, were transported to the LZB and the proportions were 17% and 35%, respectively, for Lekima. The land use on the watersheds increased the rates of land-derived nutrient loading and altered their biogeochemical forms. Consequently, the average concentrations of dissolved inorganic nitrogen (DIN) and phosphorus (DIP) in the LZB increased by 2.6 and 1.0 times post-Rumbia and by 3.5 and 1.3 times post-Lekima, respectively. Relatively lower salinity and temperature, sudden increases in DIN, and strengthened coastal currents stimulated the growth of highly adaptable and small diatoms, resulting in the first diatom blooms. Subsequently, a bloom of Noctiluca scintillans formed.
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Affiliation(s)
- Hongguan Li
- Frontiers Science Center for Deep Ocean Multispheres and Earth System, and Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, Qingdao, 266100, China; College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao, 266100, China
| | - Shanshan Li
- Frontiers Science Center for Deep Ocean Multispheres and Earth System, and Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, Qingdao, 266100, China; College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao, 266100, China
| | - Mingzheng Zhang
- Frontiers Science Center for Deep Ocean Multispheres and Earth System, and Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, Qingdao, 266100, China; College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao, 266100, China
| | - Xiuren Li
- College of Oceanic and Atmospheric Sciences, Ocean University of China, Qingdao, 266100, China
| | - Zehao Xu
- Frontiers Science Center for Deep Ocean Multispheres and Earth System, and Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, Qingdao, 266100, China; College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao, 266100, China
| | - Haoyang Ma
- College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao, 266100, China
| | - Shengkang Liang
- Frontiers Science Center for Deep Ocean Multispheres and Earth System, and Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, Qingdao, 266100, China; Laboratory for Marine Ecology and Environmental Science, Qingdao National Laboratory for Marine Science and Technology, Qingdao, 266237, China.
| | - Dehai Song
- Key Laboratory of Physical Oceanography (Ocean University of China), Ministry of Education, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China
| | - Junlong Li
- State Environmental Protection Key Laboratory of Quality Control in Environmental Monitoring, China National Environmental Monitoring Center, Beijing, 100012, China
| | - Yuanqing Ma
- Shandong Marine Resources and Environment Research Institute, Yantai, 264000, China
| | - Huawei Qin
- Shandong Marine Resources and Environment Research Institute, Yantai, 264000, China
| | - Diansheng Ji
- Yantai Marine Environmental Monitoring Central Station, State Oceanic Administration (SOA), Yantai, 264000, China
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Wang T, Chen X, Li J, Qin S. Phylogenetic Structure of Synechococcus Assemblages and Its Environmental Determinants in the Bay and Strait Areas of a Continental Sea. Front Microbiol 2022; 13:757896. [PMID: 35464975 PMCID: PMC9020259 DOI: 10.3389/fmicb.2022.757896] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2021] [Accepted: 02/23/2022] [Indexed: 11/23/2022] Open
Abstract
Marine Synechococcus, a significant contributor to primary production, shows high phylogenetic diversity. However, studies on its phylogenetic composition in the Bohai Sea, the largest continental sea in China, are lacking. We sequenced rpoC1 (encodes the RNA polymerase β’ subunit protein) in samples from the Laizhou Bay (LZB) and Bohai Strait (BS) in June and November using high-throughput sequencing to reveal the phylogenetic composition of Synechococcus assemblages in the bay and strait areas of the Bohai Sea. In total, 12 lineages representing Synechococcus subclusters S5.1, S5.2, and S5.3 were identified. Spatially, clade I was obligately dominant in BS. In contrast, the Synechococcus assemblage in LZB was more diverse, with clades VI and III being highly abundant. In addition, we detected strong variation in Synechococcus structure between June and November in the Bohai Sea. Clades II, III, XX, and miyav were only detected in November. Vertically, variation in Synechococcus assemblage was not apparent among the water layers probably due to the shallow water depth with intense water mixing. Results of redundancy analysis (RDA) and random forest (RF) analysis together highlighted the key role of silicate in the Synechococcus assemblage. Our results suggested that the Bohai Sea provides various niches for different Synechococcus clades, resulting in a special phylogenetic composition of the Synechococcus assemblage, compared with that in the adjacent shelf sea and other continental seas in the world.
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Affiliation(s)
- Ting Wang
- Key Laboratory of Coastal Biology and Biological Resource Conservation, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai, China.,College of Environmental Science and Engineering, Ocean University of China, Qingdao, China.,CAS Key Laboratory for Experimental Study Under Deep-Sea Extreme Conditions, Institute of Deep-Sea Science and Engineering, Chinese Academy of Sciences, Sanya, China.,University of Chinese Academy of Sciences, Beijing, China
| | - Xi Chen
- College of Marine Life Science, Ocean University of China, Qingdao, China
| | - Jialin Li
- Key Laboratory of Coastal Biology and Biological Resource Conservation, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai, China.,Center for Ocean Mega-Science, Chinese Academy of Sciences, Qingdao, China
| | - Song Qin
- Key Laboratory of Coastal Biology and Biological Resource Conservation, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai, China.,Center for Ocean Mega-Science, Chinese Academy of Sciences, Qingdao, China
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Liu F, Zhang C, Wang Y, Chen G. A review of the current and emerging detection methods of marine harmful microalgae. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 815:152913. [PMID: 34999066 DOI: 10.1016/j.scitotenv.2022.152913] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/26/2021] [Revised: 12/13/2021] [Accepted: 12/31/2021] [Indexed: 06/14/2023]
Abstract
In recent years, the scale and frequency of outbreaks of harmful algal blooms (HABs) have increased year by year due to the intensification of seawater eutrophication and global climate change. HABs have become a global marine ecological and environmental problem, which poses a serious threat to human health, marine ecological security, and economic development. The establishment of detection technology for harmful microalgae is fundamental to the early warning and prevention of HABs. To date, several detection methods have been developed for harmful microalgae, they however lack a unified classification standard. It is difficult to use a reasonable mix of all the developed methods to improve the accuracy of detection results. Here, all of the established detection methods for harmful microalgae were reviewed, including morphological structure-based detection methods, cytochrome-based detection techniques, immunoassays, and nucleic acid-based detection methods. The principles, advantages, and weaknesses of these methods were highlighted. Their application in the detection of harmful microalgae was summarized. Overall, different detection methods are suitable for different purposes. Further development of more accurate, cost-effective, efficient, and rapid detection technology is required in the future. This review is expected to provide a reference for research related to the monitoring of marine environment, early warning of HABs, and the molecular identification of harmful microalgae.
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Affiliation(s)
- Fuguo Liu
- School of Marine Science and Technology, Harbin Institute of Technology (Weihai), Weihai 264209, PR China; School of Environment, Harbin Institute of Technology, Harbin 150090, PR China
| | - Chunyun Zhang
- School of Marine Science and Technology, Harbin Institute of Technology (Weihai), Weihai 264209, PR China; School of Marine Sciences, Ningbo University, Ningbo 315211, PR China.
| | - Yuanyuan Wang
- School of Marine Science and Technology, Harbin Institute of Technology (Weihai), Weihai 264209, PR China
| | - Guofu Chen
- School of Marine Science and Technology, Harbin Institute of Technology (Weihai), Weihai 264209, PR China.
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Sun D, Fan J, Wang S, Zhang H, Shen X, Yuan Y, He Y. Understanding optical absorption associated with phytoplanktonic groups in the marginal seas. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 789:147846. [PMID: 34051501 DOI: 10.1016/j.scitotenv.2021.147846] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/30/2021] [Revised: 05/15/2021] [Accepted: 05/15/2021] [Indexed: 06/12/2023]
Abstract
Marine phytoplankton absorption plays an important role in oceanic biological productivity and ecological environmental dynamics. Understanding the optical absorption variability associated with phytoplanktonic groups still remains a challenge. In this study, samples (n = 206) were collected for the marginal seas of the northwest Pacific Ocean from six cruise surveys that covered different seasons. Using in situ parameters, including phytoplankton absorption coefficients and concentrations of the phytoplanktonic groups derived from phytoplankton pigments collected with high-performance liquid chromatography (HPLC), we developed a Gaussian model to characterize the specific absorption spectra of eight phytoplanktonic groups, including diatoms, chlorophytes, cryptophytes, cyanobacteria, prymnesiophytes, prasinophytes, dinoflagellates, and chrysophytes, without the package effect. The model was established by accurately identifying for the numbers and locations of the Gaussian peaks and their corresponding half-wave widths. The proposed model produced promising results, and a leave-one-out cross validation generated R2 values exceeding 0.7 for the whole visible light range and above 0.85 (correspondingly MAPE <40%) for the simulated wave bands, excluding the range of 550-650 nm. Meanwhile, a comparison with several spectra observed in the lab showed a high degree of similarity, indicative of the superior performance of our model. Applying the documented specific absorption spectra to the investigated water bodies (whether water surface or profiles) enabled us to quantify the absorption coefficients from different phytoplanktonic groups and characterize their relative contributions to the total. The findings of this study support our understanding of the dynamics of phytoplankton community structure with optical data.
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Affiliation(s)
- Deyong Sun
- School of Marine Sciences, Nanjing University of Information Science & Technology, Nanjing 210044, China
| | - Jie Fan
- School of Marine Sciences, Nanjing University of Information Science & Technology, Nanjing 210044, China
| | - Shengqiang Wang
- School of Marine Sciences, Nanjing University of Information Science & Technology, Nanjing 210044, China.
| | - Hailong Zhang
- School of Marine Sciences, Nanjing University of Information Science & Technology, Nanjing 210044, China
| | - Xiaojing Shen
- Institute of Applied Meteorology in Beijing, Beijing 100029, China
| | - Yibo Yuan
- Shanghai Investigation, Design & Research Institute Co., Ltd., Shanghai 200335, China
| | - Yijun He
- School of Marine Sciences, Nanjing University of Information Science & Technology, Nanjing 210044, China
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