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Luo J, Wang N, Zhu Y, Wu Z, Ye Z, Christakos G, Wu J. Seasonal effects of fish, seaweed and abalone cultures on dissolved organic matter and carbon sequestration potential in Sansha Bay, China. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 945:174144. [PMID: 38901588 DOI: 10.1016/j.scitotenv.2024.174144] [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: 02/28/2024] [Revised: 06/17/2024] [Accepted: 06/17/2024] [Indexed: 06/22/2024]
Abstract
Coastal bays serve as undeniable dissolved organic matter (DOM) reactors and the role of prevalent mariculture in DOM cycling deserves investigation. This study, based on four seasonal field samplings and a laboratory incubation experiment, examined the source and seasonal dynamics of DOM and fluorescent dissolved organic matter (FDOM) in the seawater of fish (Larimichthys crocea, LC), seaweed (Gracilaria lemaneiformis, GL) and abalone (Haliotis sp., HA) culturing zones in Sansha Bay, China. Using three-dimensional fluorescence spectroscopy coupled with parallel factor analysis (EEMs-PARAFAC), three fluorescent components were identified, i.e. protein-like C1, protein-like C2, and humic-like C3. Our results showed that mariculture activities dominated the DOM pool by seasonal generating abundant DOM with lower aromaticity and humification degrees. Accounting for 40-95 % of total fluorescent components, C1 (Ex/Em = 300/340 nm) was regarded the same as D1 (Ex/Em = 300/335 nm) identified in a 180-day degradation experiments of G. lemaneiformis detritus, indicating that the cultured seaweed modulated DOM through the seasonal production of C1. In addition, the incubation experiment revealed that 0.7 % of the total carbon content of seaweed detritus could be preserved as recalcitrant dissolved organic carbon (RDOC). However, fish culture appeared to contribute to liable DOC and protein-like C2, exerting a substantial impact on DOM during winter but making a negligible contribution to carbon sequestration, while abalone culture might promote the potential export and sequestration of seaweed-derived carbon to the ocean. Our results highlight the influences of mariculture activities, especially seaweed culture, in shaping DOM pool in coastal bays. These findings can provide reference for future studies on the carbon accounting of mariculture.
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Affiliation(s)
- Ji Luo
- Ocean College, Zhejiang University, Zhoushan, China
| | - Nan Wang
- Ocean College, Zhejiang University, Zhoushan, China
| | - Yaojia Zhu
- Ocean College, Zhejiang University, Zhoushan, China; Ocean Academy, Zhejiang University, Zhoushan, China
| | - Zhenyu Wu
- Ocean College, Zhejiang University, Zhoushan, China
| | - Zhanjiang Ye
- Ocean College, Zhejiang University, Zhoushan, China
| | | | - Jiaping Wu
- Ocean College, Zhejiang University, Zhoushan, China; Ocean Academy, Zhejiang University, Zhoushan, China.
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2
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Ma J, Shi K, Zhang W, Han S, Wu Z, Wang M, Zhang H, Sun J, Wang N, Chang M, Shi X, Tan S, Wang W, Zang S, Sha Z. The survival, gene expression, and DNA methylation of Paralichthys olivaceus impacted by the decay of green tide and bacterial infection in both laboratory and field simulation experiments. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 942:173427. [PMID: 38797400 DOI: 10.1016/j.scitotenv.2024.173427] [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: 03/22/2024] [Revised: 05/08/2024] [Accepted: 05/19/2024] [Indexed: 05/29/2024]
Abstract
The recurring appearance of Ulva prolifera green tides has become a pressing environmental issue, especially for marine transportation, tourism, and aquaculture in the stage of decomposition. An abundance of decaying U. prolifera leads to water acidification, hypoxia and pathogenic microorganism proliferation, threatening marine germplasm resources, particularly benthic organisms with weak escape ability. Epigenetic modification is considered to be one of the molecular mechanisms involved in the plastic adaptive response to environmental changes. However, few studies concerning the specific impact of decaying green tide on benthic animals at the epigenetic level. In this study, decomposing algal effluents of U. prolifera, sediments containing uncorrupted U. prolifera, pathogenic microorganism were considered as impact factors, to reveal the effect of decaying U. prolifera on marine economic benthic species, Paralichthys olivaceus, using both field and laboratory simulation experiments. Field simulation experiment showed higher mortality rates and serious histopathological damage than the laboratory simulation experiment. And both the decaying U. prolifera and the sediment containing U. prolifera were harmful to P. olivaceus. Genome-wide DNA methylation and transcription correlation analyses showed that the response of P. olivaceus to green tide stress and bacterial infection was mainly mediated by immune signaling pathways such as PI3K-Akt signaling pathway. DNA methylation regulates the expression of immune-related genes involved in the PI3K-Akt signaling pathway, which enables P. olivaceus to adapt to the adverse environmental stresses by resisting apoptosis. In summary, this research analyzed the potential role of P. olivaceus in decaying U. prolifera, which is of great significance for understanding the impact of decaying green tide on marine commercial fish and also provides some theoretical guidance for the proliferation and release of fish seedlings.
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Affiliation(s)
- Jie Ma
- Institute of Aquatic Biotechnology, College of Life Sciences, Qingdao University, Qingdao 266071, China
| | - Kunpeng Shi
- Institute of Aquatic Biotechnology, College of Life Sciences, Qingdao University, Qingdao 266071, China
| | - Weijun Zhang
- Institute of Aquatic Biotechnology, College of Life Sciences, Qingdao University, Qingdao 266071, China
| | - Sen Han
- Institute of Aquatic Biotechnology, College of Life Sciences, Qingdao University, Qingdao 266071, China
| | - Zhendong Wu
- Institute of Aquatic Biotechnology, College of Life Sciences, Qingdao University, Qingdao 266071, China
| | - Muyuan Wang
- Institute of Aquatic Biotechnology, College of Life Sciences, Qingdao University, Qingdao 266071, China
| | - Haibo Zhang
- National Marine Environmental Monitoring Center, Dalian 116000, China
| | - Jiacheng Sun
- Institute of Aquatic Biotechnology, College of Life Sciences, Qingdao University, Qingdao 266071, China
| | - Ningning Wang
- Institute of Aquatic Biotechnology, College of Life Sciences, Qingdao University, Qingdao 266071, China
| | - Mengyang Chang
- Institute of Aquatic Biotechnology, College of Life Sciences, Qingdao University, Qingdao 266071, China
| | - Xiaoyong Shi
- Marine Hazard Mitigation Center, Ministry of Natural Resources, Beijing 100194, China
| | - Suxu Tan
- Institute of Aquatic Biotechnology, College of Life Sciences, Qingdao University, Qingdao 266071, China
| | - Wenwen Wang
- Institute of Aquatic Biotechnology, College of Life Sciences, Qingdao University, Qingdao 266071, China
| | - Shaoqing Zang
- Institute of Aquatic Biotechnology, College of Life Sciences, Qingdao University, Qingdao 266071, China
| | - Zhenxia Sha
- Institute of Aquatic Biotechnology, College of Life Sciences, Qingdao University, Qingdao 266071, China; Laboratory for Marine Fisheries Science and Food Production Processes, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266237, China.
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3
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Cao L, Qiu Y, Xue L, Zhang Y, Zhang S, Wu N, Yuan D, Li Q, Zhao Z, Wang N, Zhou Y, Yang W, Li C, Liu Y. Sea surface carbon dioxide during early summer at the Tuandao nearshore time series site. MARINE ENVIRONMENTAL RESEARCH 2024; 201:106699. [PMID: 39178709 DOI: 10.1016/j.marenvres.2024.106699] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/29/2023] [Revised: 08/14/2024] [Accepted: 08/17/2024] [Indexed: 08/26/2024]
Abstract
To investigate air-sea CO2 flux at the Qingdao nearshore site and its temporal variations, a high-resolution continuous observation of surface carbon dioxide partial pressure (pCO2) was carried out at Zhongyuan Pier near Tuandao from May 25 to July 8, 2019. It was observed that during this period, surface pCO2 varied between ∼490 and ∼690 μatm, mainly associated with sea surface temperature. Surface pCO2 also displayed substantial diurnal variations, with an average amplitude of 64 ± 21 μatm, largely dominated by biological activities. During the observational period, this site acted as a source of atmospheric CO2, releasing 361 mmol CO2 m-2. The notable diurnal variations in air-sea CO2 flux, such as the observed average amplitude of 10.9 mmol m-2 d-1 in this study, pose a challenge for accurately estimating the air-sea CO2 flux in coastal regions without high-resolution observations.
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Affiliation(s)
- Lu Cao
- Institute of Oceanographic Instrumentation, Qilu University of Technology (Shandong Academy of Sciences), Shandong Provincial Key Laboratory of Ocean Environmental Monitoring Technology, Qingdao, 266100, China; Ocean Observation and Exloration Research Department, Laoshan National Laboratory, Qingdao, 266200, China
| | - Yongqi Qiu
- Institute of Oceanographic Instrumentation, Qilu University of Technology (Shandong Academy of Sciences), Shandong Provincial Key Laboratory of Ocean Environmental Monitoring Technology, Qingdao, 266100, China
| | - Liang Xue
- First Institute of Oceanography, And Key Laboratory of Marine Science and Numerical Modeling, Ministry of Natural Resources, Qingdao, 266061, China.
| | - Yingying Zhang
- Institute of Oceanographic Instrumentation, Qilu University of Technology (Shandong Academy of Sciences), Shandong Provincial Key Laboratory of Ocean Environmental Monitoring Technology, Qingdao, 266100, China
| | - Shuwei Zhang
- Institute of Oceanographic Instrumentation, Qilu University of Technology (Shandong Academy of Sciences), Shandong Provincial Key Laboratory of Ocean Environmental Monitoring Technology, Qingdao, 266100, China; Ocean Observation and Exloration Research Department, Laoshan National Laboratory, Qingdao, 266200, China
| | - Ning Wu
- Institute of Oceanographic Instrumentation, Qilu University of Technology (Shandong Academy of Sciences), Shandong Provincial Key Laboratory of Ocean Environmental Monitoring Technology, Qingdao, 266100, China; Ocean Observation and Exloration Research Department, Laoshan National Laboratory, Qingdao, 266200, China
| | - Da Yuan
- Institute of Oceanographic Instrumentation, Qilu University of Technology (Shandong Academy of Sciences), Shandong Provincial Key Laboratory of Ocean Environmental Monitoring Technology, Qingdao, 266100, China
| | - Quanlong Li
- State Key Laboratory of Marine Environmental Science, College of the Environment and Ecology, Xiamen University, Xiamen, 361102, China
| | - Zheng Zhao
- North China Sea Marine Forecasting Center of State Oceanic Administration, Qingdao, 266061, China
| | - Ning Wang
- North China Sea Marine Forecasting Center of State Oceanic Administration, Qingdao, 266061, China
| | - Yan Zhou
- Institute of Oceanographic Instrumentation, Qilu University of Technology (Shandong Academy of Sciences), Shandong Provincial Key Laboratory of Ocean Environmental Monitoring Technology, Qingdao, 266100, China
| | - Wei Yang
- Polar and Marine Research Institute, Jimei University, Xiamen, 361021, China
| | - Chunqian Li
- Ocean Observation and Exloration Research Department, Laoshan National Laboratory, Qingdao, 266200, China
| | - Yan Liu
- Institute of Oceanographic Instrumentation, Qilu University of Technology (Shandong Academy of Sciences), Shandong Provincial Key Laboratory of Ocean Environmental Monitoring Technology, Qingdao, 266100, China; Ocean Observation and Exloration Research Department, Laoshan National Laboratory, Qingdao, 266200, China.
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4
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Li BH, Gong JC, Li CX, Liu T, Hu JW, Li PF, Liu CY, Yang GP. Regulation of seawater dissolved carbon pools by environmental changes in Ulva prolifera originating sites: A new perspective on the contribution of U. prolifera to the seawater carbon sink function. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2024; 360:124679. [PMID: 39116923 DOI: 10.1016/j.envpol.2024.124679] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/27/2024] [Revised: 07/11/2024] [Accepted: 08/04/2024] [Indexed: 08/10/2024]
Abstract
The Ulva prolifera bloom is considered one of the most serious ecological disasters in the Yellow Sea in the past decade, forming a carbon sink in its source area within a short period but becoming a carbon source at its destination. To explore the effects of different environmental changes on seawater dissolved carbon pools faced by living U. prolifera in its originating area, U. prolifera were cultured in three sets with different light intensity (54, 108, and 162 μmol m-2 s-1), temperature (12, 20, and 28 °C) and nitrate concentration gradients (25, 50, and 100 μmol L-1). The results showed that moderate light (108 μmol m-2 s-1), temperature (20 °C), and continuous addition of exogenous nitrate significantly enhanced the absorption of dissolved inorganic carbon (DIC) in seawater by U. prolifera and most promoted its growth. Under the most suitable environment, the changes in the seawater carbonate system were mainly dominated by biological production and denitrification, with less influence from aerobic respiration. Facing different environmental changes, U. prolifera continuously changed its carbon fixation mode according to tissue δ13C results, with the changes in the concentrations of various components of DIC in seawater, especially the fluctuation of HCO3- and CO2 concentrations. Enhanced light intensity of 108 μmol m-2 s-1 could shift the carbon fixation pathway of U. prolifera towards the C4 pathway compared to temperature and nitrate stimulation. Environmental conditions at the origin determined the amount of dissolved carbon fixed by U. prolifera. Therefore, more attention should be paid to the changes in marine environmental conditions at the origin of U. prolifera, providing a basis for scientific management of U. prolifera.
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Affiliation(s)
- Bing-Han Li
- Frontiers Science Center for Deep Ocean Multispheres and Earth System, Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao, 266100, China; Laboratory for Marine Ecology and Environmental Science, Qingdao Marine Science and Technology Center, Qingdao, 266237, China
| | - Jiang-Chen Gong
- Frontiers Science Center for Deep Ocean Multispheres and Earth System, Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao, 266100, China; Laboratory for Marine Ecology and Environmental Science, Qingdao Marine Science and Technology Center, Qingdao, 266237, China
| | - Cheng-Xuan Li
- First Institute of Oceanography, Ministry of Natural Resources, Qingdao, 266061, China
| | - Tao Liu
- College for Ocean and Earth Science, Xiamen University, Xiamen, 361102, China
| | - Jing-Wen Hu
- Frontiers Science Center for Deep Ocean Multispheres and Earth System, Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao, 266100, China
| | - Pei-Feng Li
- Frontiers Science Center for Deep Ocean Multispheres and Earth System, Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao, 266100, China; Laboratory for Marine Ecology and Environmental Science, Qingdao Marine Science and Technology Center, Qingdao, 266237, China
| | - Chun-Ying Liu
- Frontiers Science Center for Deep Ocean Multispheres and Earth System, Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao, 266100, China; Laboratory for Marine Ecology and Environmental Science, Qingdao Marine Science and Technology Center, Qingdao, 266237, China.
| | - Gui-Peng Yang
- Frontiers Science Center for Deep Ocean Multispheres and Earth System, Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao, 266100, China; Laboratory for Marine Ecology and Environmental Science, Qingdao Marine Science and Technology Center, Qingdao, 266237, China.
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5
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Sun Y, Xia Z, Tong Y, Li S, Zhang J, He P. Mixed acid treatment for removal of green macroalgae from Neopyropia aquaculture nets: Field experiment in the Subei Shoal, China. MARINE POLLUTION BULLETIN 2024; 202:116373. [PMID: 38636343 DOI: 10.1016/j.marpolbul.2024.116373] [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: 03/15/2024] [Revised: 04/09/2024] [Accepted: 04/09/2024] [Indexed: 04/20/2024]
Abstract
To develop an effective method to eliminate green macroalgae attached to Neopyropia aquaculture nets, we explored the influence of mixed acid solution on the photosynthetic fluorescence characteristics of Ulva spp. (green macroalgae) and Neopyropia yezoensis (red macroalgae) from Dafeng and Rudong aquaculture areas in Jiangsu Province, China. Treatment with mixed acid solution (0.0475 % hydrochloric acid:citric acid (pH 2.0) at a ratio of 4:3) for 60 s caused death of Ulva spp., but did not affect N. yezoensis. Additionally, a mixed acid solution effectively eliminated green macroalgae from Neopyropia aquaculture rafts and the marine environment remained unaffected. Hence, the application of mixed acid solution treatment has demonstrated significant efficacy in eradicating green macroalgae adhered to Neopyropia aquaculture rafts, thus presenting a promising strategy for mitigating green macroalgae proliferation in Neopyropia aquaculture areas and curbing their contribution to green tides.
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Affiliation(s)
- Yuqing Sun
- College of Oceanography and Ecological Science, Shanghai Ocean University, Shanghai 201306, China
| | - Zhangyi Xia
- College of Oceanography and Ecological Science, Shanghai Ocean University, Shanghai 201306, China
| | - Yichao Tong
- College of Oceanography and Ecological Science, Shanghai Ocean University, Shanghai 201306, China; Institute of Marine Science and Technology, Shandong University, Qingdao 266237, China
| | - Shuang Li
- College of Oceanography and Ecological Science, Shanghai Ocean University, Shanghai 201306, China
| | - Jianheng Zhang
- College of Oceanography and Ecological Science, Shanghai Ocean University, Shanghai 201306, China.
| | - Peimin He
- College of Oceanography and Ecological Science, Shanghai Ocean University, Shanghai 201306, China.
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Saalim M, Liu S, Bennett SD, Zaleta-Pinet DA, Poulin RX, Clark BR. Precursor-Directed Biosynthesis of Antialgal Fluorinated Bacillamide Derivatives in Bacillus atrophaeus. JOURNAL OF NATURAL PRODUCTS 2024; 87:388-395. [PMID: 38319739 DOI: 10.1021/acs.jnatprod.3c01178] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/08/2024]
Abstract
The bacillamides are a class of indole alkaloids produced by the Bacillus genus that possess significant antialgal activity. Incorporation of fluorine into the bacillamides was carried out using a precursor-directed biosynthesis approach, with 4-, 5-, and 6-fluorotryptophan added to growing cultures of Bacillus atrophaeus IMG-11. This yielded the corresponding fluorinated analogues of bacillamides A and C, in addition to new derivatives of the related metabolite N-acetyltryptamine, thus demonstrating a degree of plasticity in the bacillamide biosynthetic pathway. The bacillamide derivatives were tested for activity against bloom-forming algae, which revealed that fluorination could improve the antialgal activity of these compounds in a site-specific manner, with fluorination at the 6-position consistently resulting in improved activity.
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Affiliation(s)
- Muhammad Saalim
- School of Pharmaceutical Science and Technology, Tianjin University, 92 Weijin Road, Tianjin 300072, People's Republic of China
| | - Sijing Liu
- School of Pharmaceutical Science and Technology, Tianjin University, 92 Weijin Road, Tianjin 300072, People's Republic of China
| | - Sandra D Bennett
- Center for Marine Science, University of North Carolina Wilmington, Wilmington, North Carolina 28403, United States
| | - Diana A Zaleta-Pinet
- School of Pharmaceutical Science and Technology, Tianjin University, 92 Weijin Road, Tianjin 300072, People's Republic of China
| | - Remington X Poulin
- Center for Marine Science, University of North Carolina Wilmington, Wilmington, North Carolina 28403, United States
- Department of Chemistry and Biochemistry, University of North Carolina Wilmington, Wilmington, North Carolina 28403, United States
| | - Benjamin R Clark
- School of Pharmaceutical Science and Technology, Tianjin University, 92 Weijin Road, Tianjin 300072, People's Republic of China
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Li Y, Xue L, Yang X, Wei Q, Xin M, Xue M, Han C, Han P, Liu X, Zang H, Yang P, Ran X, Cao L, Cai WJ, Zhang L. Wastewater inputs reduce the CO 2 uptake by coastal oceans. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 901:165700. [PMID: 37495126 DOI: 10.1016/j.scitotenv.2023.165700] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/15/2023] [Revised: 07/16/2023] [Accepted: 07/19/2023] [Indexed: 07/28/2023]
Abstract
Every year a large quantity of wastewater is generated worldwide, but its influence on the carbon dioxide (CO2) uptake by coastal oceans is not well understood. Here, sea surface CO2 partial pressure (pCO2) and air-sea CO2 flux were examined in the Jiaozhou Bay (JZB), a temperate coastal bay strongly disturbed by wastewater inputs. Monthly surveys from April 2014 through March 2015 showed that surface pCO2 in the JZB substantially varied both temporally and spatially between 163 μatm and 1222 μatm, with an annual average of 573 μatm. During April-December, surface pCO2 was oversaturated with respect to the atmosphere, with high values exceeding 1000 μatm in the northeastern part of the bay, where seawater salinity was low mainly due to the inputs of wastewater with salinity close to zero. During January-March, surface pCO2 was undersaturated, with the lowest value of <200 μatm also mainly in the northeastern part because of low water temperature and strong biological production. Over an annual cycle, apparently sea surface temperature dominated the monthly variation of surface pCO2 in this shallow bay, while wastewater inputs and related biological production/respiration dominated its spatial variability. Overall, the JZB was a net CO2 source to the atmosphere, emitting 9.6 ± 10.8 mmol C m-2 d-1, unlike its adjacent western part of the Yellow Sea and most of the temperate coastal oceans which are a net CO2 sink. This was possibly associated with wastewater inputs that cause high sea surface pCO2 via direct inputs of CO2 and degradation of organic matter. Thus, from this viewpoint reducing wastewater discharge or lowering CO2 levels in discharged wastewater may be important paths to enhancing the CO2 uptake by coastal oceans in the future.
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Affiliation(s)
- Yunxiao Li
- Environmental Science Laboratory, College of Resource and Environment, Shanxi Agricultural University, Taigu 030801, China
| | - Liang Xue
- First Institute of Oceanography, and Key Laboratory of Marine Science and Numerical Modeling, Ministry of Natural Resources, Qingdao 266061, China.
| | - Xufeng Yang
- Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou 310012, China
| | - Qinsheng Wei
- First Institute of Oceanography, and Key Laboratory of Marine Science and Numerical Modeling, Ministry of Natural Resources, Qingdao 266061, China
| | - Ming Xin
- First Institute of Oceanography, and Key Laboratory of Marine Science and Numerical Modeling, Ministry of Natural Resources, Qingdao 266061, China
| | - Ming Xue
- State Key Laboratory of Petroleum Pollution Control, CNPC Research Institute of Safety and Environmental Technology, Beijing 102206, China
| | - Chenhua Han
- Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou 310012, China
| | - Ping Han
- Department of Environmental Engineering, Shandong Urban Construction Vocational College, Jinan 250103, China
| | - Xiangyu Liu
- College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, China
| | - Han Zang
- College of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Pengjin Yang
- North China Sea Environmental Monitoring Center, State Oceanic Administration, Qingdao 266033, China
| | - Xiangbin Ran
- First Institute of Oceanography, and Key Laboratory of Marine Science and Numerical Modeling, Ministry of Natural Resources, Qingdao 266061, China
| | - Lu Cao
- Institute of Oceanographic Instrumentation, Qilu University of Technology (Shandong Academy of Sciences), Shandong Provincial Key Laboratory of Ocean Environmental Monitoring Techno1ogy, National Engineering and Technological Research Center of Marine Monitoring Equipment, Qingdao, China; R & D Center for Marine Instruments and Apparatuses, Qingdao Marine Science and Technology Center, Qingdao, China
| | - Wei-Jun Cai
- School of Marine Science and Policy, University of Delaware, Newark, DE, USA
| | - Longjun Zhang
- College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, China
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Xiong T, Li H, Yue Y, Hu Y, Zhai WD, Xue L, Jiao N, Zhang Y. Legacy Effects of Late Macroalgal Blooms on Dissolved Inorganic Carbon Pool through Alkalinity Enhancement in Coastal Ocean. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2023; 57:2186-2196. [PMID: 36693338 DOI: 10.1021/acs.est.2c09261] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Taking the world's largest green tide caused by the macroalga Ulva prolifera in the South Yellow Sea as a natural case, it is studied here if macroalgae can perform inorganic carbon sequestration in the ocean. Massive macroalgae released large amounts of organic carbon, most of which were transformed by microorganisms into dissolved inorganic carbon (DIC). Nearshore field investigations showed that, along with seawater deoxygenation and acidification, both DIC and total alkalinity (TAlk) increased significantly (both >50%) in the areas covered by dense U. prolifera at the late-bloom stage. Offshore mapping cruises revealed that DIC and TAlk were relatively higher at the late-bloom stage than at the before-bloom stage. Laboratory cultivation of U. prolifera at the late-bloom stage further manifested a significant enhancement effect on DIC and TAlk in seawater. Sulfate reduction and/or denitrification likely dominated the production of TAlk. Notably, half of the generated DIC and almost all the TAlk could persist in seawater under varying conditions, from hypoxia to normoxia and from air-water CO2 disequilibrium to re-equilibrium. The enhancement of TAlk allowed more DIC to remain in the seawater rather than escape into the atmosphere, thus having the long-term legacy effect of increasing DIC pool in the ocean.
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Affiliation(s)
- Tianqi Xiong
- CAS Key Laboratory of Biofuels, Shandong Provincial Key Laboratory of Energy Genetics, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao 266101, China
- Shandong Energy Institute, Qingdao 266101, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Hongmei Li
- CAS Key Laboratory of Biofuels, Shandong Provincial Key Laboratory of Energy Genetics, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao 266101, China
- Shandong Energy Institute, Qingdao 266101, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Yufei Yue
- CAS Key Laboratory of Biofuels, Shandong Provincial Key Laboratory of Energy Genetics, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao 266101, China
- Shandong Energy Institute, Qingdao 266101, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Yubin Hu
- Institute of Marine Science and Technology, Shandong University, Qingdao 266237, China
| | - Wei-Dong Zhai
- Institute of Marine Science and Technology, Shandong University, Qingdao 266237, China
- Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai 519080, China
| | - Liang Xue
- First Institute of Oceanography, Ministry of Natural Resources, Qingdao 266061, China
| | - Nianzhi Jiao
- State Key Laboratory of Marine Environmental Science, Xiamen University, Xiamen 361100, China
| | - Yongyu Zhang
- CAS Key Laboratory of Biofuels, Shandong Provincial Key Laboratory of Energy Genetics, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao 266101, China
- Shandong Energy Institute, Qingdao 266101, China
- University of Chinese Academy of Sciences, Beijing 100049, China
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9
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Sun Y, Xia Z, Cao X, Tong Y, He R, Fu M, Sun J, Xu H, Xia J, Liu J, Kim JK, Zhang J, Zhao S, He P, Liu W. A mixed acid treatment for the prevention of Ulva prolifera attachment to Neopyropia aquaculture rafts: Laboratory experimentation. MARINE POLLUTION BULLETIN 2022; 184:114134. [PMID: 36166858 DOI: 10.1016/j.marpolbul.2022.114134] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/12/2022] [Revised: 09/06/2022] [Accepted: 09/09/2022] [Indexed: 06/16/2023]
Abstract
The sessile green macroalgae in the Neopyropia aquaculture areas of the Subei Shoal are a confirmed source of green tides in the Southern Yellow Sea (SYS) of China. The green tides have a significant impact on local economic development (tourism, aquaculture, etc.) and ecological stability. In order to develop an effective method for eliminating the green macroalgae attached to Neopyropia aquaculture rafts, this study investigated the effects of mixed acid solutions (0.0475 % hydrochloric acid [HCl] and pH 2.0 citric acid) on cell damage, chlorophyll composition, phycobiliprotein content, and the photosynthetic fluorescence characteristics of Ulva prolifera and Neopyropia yezoensis. The chlorophyll contents of U. prolifera and N. yezoensis were significantly affected by the mixed acid solutions. After treatment with a mixed acid solution (4:3 volume ratio of HCl to citric acid) for 5 s, the photosynthetic pigment content of U. prolifera was significantly different from that of normal U. prolifera. However, photosynthetic pigment content in the treated N. yezoensis increased significantly. In addition, mixed acid solution treatment had a significant effect on the Fv/Fm of U. prolifera and N. yezoensis. After mixed acid treatment (4:3 HCl to citric acid), U. prolifera completely died, but the Fv/Fm of N. yezoensis was restored after 3 d. Therefore, a mixed acid solution comprising 0.0475 % HCl and pH 2.0 citric acid (at a volume ratio of 4:3) can be used as an agent for the removal of green macroalgae from Neopyropia aquaculture areas.
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Affiliation(s)
- Yuqing Sun
- College of Marine Ecology and Environment, Shanghai Ocean University, Shanghai 201306, China
| | - Zhangyi Xia
- College of Marine Ecology and Environment, Shanghai Ocean University, Shanghai 201306, China
| | - Xiaoli Cao
- College of Marine Ecology and Environment, Shanghai Ocean University, Shanghai 201306, China
| | - Yichao Tong
- College of Marine Ecology and Environment, Shanghai Ocean University, Shanghai 201306, China
| | - Ruyan He
- College of Marine Ecology and Environment, Shanghai Ocean University, Shanghai 201306, China
| | - Meilin Fu
- College of Marine Ecology and Environment, Shanghai Ocean University, Shanghai 201306, China
| | - Jingyi Sun
- College of Marine Ecology and Environment, Shanghai Ocean University, Shanghai 201306, China
| | - Hong Xu
- Jiangsu Ruixue Haiyang Science and Technology Ltd., Nantong 226010, China
| | - Jing Xia
- College of Marine Ecology and Environment, Shanghai Ocean University, Shanghai 201306, China; School of Oceanography, Shanghai Jiao Tong University, Shanghai 200030, China
| | - Jinlin Liu
- College of Marine Ecology and Environment, Shanghai Ocean University, Shanghai 201306, China; The Key Laboratory of Zoological Systematics and Application, Hebei University, Baoding 071002, China.
| | - Jang Kyun Kim
- Department of Marine Science, School of Natural Sciences, Incheon National University, Incheon 22012, Republic of Korea
| | - Jianheng Zhang
- College of Marine Ecology and Environment, Shanghai Ocean University, Shanghai 201306, China.
| | - Shuang Zhao
- College of Marine Ecology and Environment, Shanghai Ocean University, Shanghai 201306, China.
| | - Peimin He
- College of Marine Ecology and Environment, Shanghai Ocean University, Shanghai 201306, China.
| | - Wei Liu
- College of Marine Ecology and Environment, Shanghai Ocean University, Shanghai 201306, China; Department of Agriculture and Biotechnology, Wenzhou Vocational College of Science and Technology, Wenzhou 325006, China.
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10
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Li BH, Hu JW, Xin Y, Liu CY, Li PF, Yang GP. Changes in dissolved organic pool and regulation of associated nutrients during green tides: A case study of Ulva prolifera bloom in the southern Yellow Sea. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 838:155878. [PMID: 35580678 DOI: 10.1016/j.scitotenv.2022.155878] [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: 02/02/2022] [Revised: 05/04/2022] [Accepted: 05/08/2022] [Indexed: 06/15/2023]
Abstract
To explore the spatial and temporal distributions of dissolved organic matter (DOM) affected by Ulva prolifera bloom and the regulation of DOM released by the addition of nitrate (NO3-N) nutrients, the variation in DOM was analyzed by three cruises in the coastal waters of the southern Yellow Sea (SYS) off Qingdao during a 2018 U. prolifera bloom. A mesocosm experiment was conducted during the decay of U. prolifera. The U. prolifera bloom resulted in higher concentrations of the bulk DOM except for total dissolved amino acids (TDAA), compared with levels recorded during non-bloom periods. Three different fluorescent substances of chromophoric dissolved organic matter (CDOM) were identified, which were also affected by the bloom. Concentrations of total dissolved carbohydrates (TCHO), monosaccharides (MCHO), and polysaccharides (PCHO) peaked during the late bloom, with average levels of 49.78 ± 9.73, 14.23 ± 3.32, and 35.55 ± 9.19 μmol C L-1, respectively, accompanied by an increase of DOC, indicating release of DOM with U. prolifera decay. In contrast, the concentrations of CDOM and TDAA declined during the late bloom, with averages of 0.10 ± 0.10 m-1 and 1.16 ± 0.82 μmol L-1, suggesting that the yields of CDOM and TDAA were regulated by the U. prolifera bloom and other mechanism. These findings were confirmed by the mesocosm experiment. DOM production was obviously improved by NO3-N addition except for TDAA and CDOM. The release of protein-like CDOM was primarily regulated by NO3-N nutrients, however, it was not obvious with humic-like CDOM. Our findings provide evidence supporting the role of U. prolifera blooms in the coastal DOM pool and its significant effect on the marine carbon cycle.
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Affiliation(s)
- Bing-Han Li
- Frontiers Science Center for Deep Ocean Multispheres and Earth System, Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, College of Chemistry and Chemical Engineering, 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
| | - Jing-Wen Hu
- Frontiers Science Center for Deep Ocean Multispheres and Earth System, Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266100, China
| | - Yu Xin
- Frontiers Science Center for Deep Ocean Multispheres and Earth System, Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266100, China
| | - Chun-Ying Liu
- Frontiers Science Center for Deep Ocean Multispheres and Earth System, Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, College of Chemistry and Chemical Engineering, 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.
| | - Pei-Feng Li
- Frontiers Science Center for Deep Ocean Multispheres and Earth System, Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266100, China
| | - Gui-Peng Yang
- Frontiers Science Center for Deep Ocean Multispheres and Earth System, Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, College of Chemistry and Chemical Engineering, 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
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11
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Li S, Xu Z, Wang C. Public's preference for the treatment of Ulva prolifera blooms: A choice experiment study in China. ALGAL RES 2022. [DOI: 10.1016/j.algal.2022.102776] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022]
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12
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Pervez R, Lai Z. Spatio-temporal variations of litter on Qingdao tourist beaches in China. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2022; 303:119060. [PMID: 35245618 DOI: 10.1016/j.envpol.2022.119060] [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: 11/22/2021] [Revised: 02/22/2022] [Accepted: 02/24/2022] [Indexed: 06/14/2023]
Abstract
Beaches are an integral part of coastal tourism, but they are deteriorated by the beachgoers and recreational activities due to lack of adequate beach environmental awareness and management. Litter is widely distributed in marine and coastal environment and has been considered a severe concern. In China investigations to determine the beach litter abundance and pollution level are limited. The aim of this study is to estimate spatio-temporal distribution and composition of litter on 10 well-known Qingdao tourist beaches, involving pollution level by beach quality indexes. Beach litter was collected within an area of 25 × 25 m2 in both summer (May, June and July) and winter (Nov, Dec and Jan) seasons, and was classified into eight categories. The abundance of beach litter was found higher in summer (0.13 ± 0.04 items/m2) than in winter (0.04 ± 0.01 items/m2). Overall, the percentage of plastics were higher in both summer (23.48%) and winter (24.04%) than that of other litter categories. Based on Clean Coast Index, 70% of beaches were very clean, 25% clean, and 5% moderately clean. Beach Grade Index showed that 15% beaches were very good, 5% good, 55% fair, and 25% poor. 85% beaches constituted some quantity of hazardous litter and 15% had no hazardous litter for Hazardous Items index. The findings suggest that the sources of beach litter along Qingdao beaches mainly come from the recreational and tourist activities. The substantial quantity of litter is also being transported by ocean (tides or current), which are finally deposited along beachfront. Despite regular cleaning operation along most of Qingdao beaches, suggested management practices involve mitigation measures, source reduction, change in littering behavior to improve further quality of beaches.
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Affiliation(s)
- Rashid Pervez
- Institute of Marine Sciences, Guangdong Provincial Key Laboratory of Marine Disaster Prediction and Protection, Shantou University, Shantou 515063, China.
| | - Zhongping Lai
- Institute of Marine Sciences, Guangdong Provincial Key Laboratory of Marine Disaster Prediction and Protection, Shantou University, Shantou 515063, China.
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