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Dynamic simulation of tropical coral reef ecosystem being disturbed by multiple situations

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Acta Oceanologica Sinica 2021年第9期40卷 105-116页

作者： Geng Wang Rui Dong Huimin Xu dewen ding School of Geography Liaoning Normal UniversityDalian 116029China Ocean College Beibu Gulf UniversityQinzhou 535011China First Institute of Oceanography Ministry of Natural ResourcesQingdao 266071China South China Sea Institute of Oceanology Chinese Academy of SciencesGuangzhou 510301China

In consideration of the rapid degradation of coral reef ecosystems, the establishment of models is helpful to comprehend the degradation mechanism of coral reef ecosystems and predict the development process of coral reef communities. According to the characteristics of complex ecosystem of tropical coral reefs in China, the coral reef functional group is the core level variable;combined with the multiple feedback effects of coral reef functional groups and environmental changes, the study presents a coral reef ecosystem dynamics model with hermatypic corals as the core. Based on the simulation of the assumed initial value and the internal feedback of the system, the results show that in the basic simulation(relative health conditions), the coverage area of live corals and coral reefs generally decreased first and then increased, and increased by 4.67% and 6.38% between2010 and 2050, respectively. Based on the calibration model and the current situation of the studied area, the multi-factor disturbance effects of coral reef communities were simulated and explored by setting up three scenarios involving fishing policy, terrestrial deposition, and inorganic nitrogen emissions. Among them, in the single factor disturbance, the fishing policy exerts the most direct impact on the community decline;and the succession phenomenon is obvious;the terrestrial sedimentation has a faster and more integrated effect on the community decline;the effect of inorganic nitrogen emission on the community decline is relatively slow. In the double/multi-factor disturbance, the superimposed disturbance will aggravate the multi-source feedback effect of the coral reef communities development, accelerate the community decay rate, and make its development trajectory more complicated and diverse. This method provides a scientific and feasible method for simulating the damage of long-term coral reef community and exploring the development law and adaptive management of coral reef ecosystems. In

关键词： coral reef ecosystem system dynamics situational disturbance simulation

Assessment and regulation of ocean health based on ecosystem services: Case study in the Laizhou Bay, China

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Acta Oceanologica Sinica 2015年第12期34卷 61-66页

作者： SHEN Chengcheng ZHENG Wei SHI Honghua ding dewen WANG Zongling College of Environmental Science and Engineering Ocean University of China The First Institute of Oceanography State Oceanic Administration

The ecosystem-based management of nearshore waters requires integrated assessment of ocean health and scientific guidance on artificial regulations to promote sustainable development. Quantitative approaches were developed in this paper to assess present and near-term ocean health based on ecosystem services. Results of the case study in the Laizhou Bay of China showed that the index score of ocean health was 0.785 6 out of 1.0 at present and was expected to range from 0.555 1 to 0.804 1 in the near-term future depending on different intensities of artificial regulation of negative pressures. Specifically, the results of ocean health at present mainly indicated that cultural services and provisioning services performed essentially perfectly while supporting services and regulating services functioned less well. It can be concluded that this nearshore ecosystem would partially lose supporting and regulating services in the near-term future if the increasing pressures were not wellregulated but that all of these categories of ecosystem services could be slightly improved if the negative pressures were fully controlled. Additionally, it is recommended that publicity and education on ecosystem services especially on cultural services and regulating services should be further strengthened. The analytical process and resulting quantification provide flexible tools to guide future development of regulations so as to facilitate ecosystem-based management in the coastal zone.

关键词： ocean health ecosystem services nearshore waters regulation pressure Laizhou Bay

Integration of metabolomics and transcriptomics revealed the biosynthetic mechanism of anti-parasitic compounds in Salinivibrio proteolyticus strain YCSC6

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Journal of Oceanology and Limnology 2022年第1期40卷 245-259页

作者： Guangxun DU Lingyun QU Ping GAO Wenhao HUANG Chenghua LI dewen ding School of Marine Sciences Ningbo UniversityNingbo 315832China Laboratory for Marine Fisheries Science and Food Production Processes Pilot National Laboratory for Marine Science and Technology(Qingdao)Qingdao 266237China Key Laboratory of Marine Eco-Environmental Science and Technology First Institute of OceanographyMinistry of Natural Resources(MNR)Qingdao 266061China

The fermentation broth of Salinivibrio proteolyticus strain YCSC6 shows potent anti-parasitic activity against Uronema marinum,with activity varying in each fermentation *** investigate the biosynthetic mechanism of anti-parasitic compounds in strain YCSC6,a comprehensive analysis of metabolomics and transcriptomics over four diff erent time points(12,24,48,and 72 h)was *** detected 17943 metabolites with 1129 known metabolites.A trend analysis of the known metabolites showed that 575 metabolites,including 69 polyketides,were continuously enhanced,being the potential source of anti-parasitic *** addition,941 genes mapped to the same pathways of these metabolites,were screened through the association analysis of metabolites and *** pathway enrichment of these genes showed 270 genes mapped to the biosynthesis of secondary metabolites and 192 genes mapped to the biosynthesis of *** demonstrates the potent secondary metabolic capacity of strain ***,a gene-metabolite correlation network was created based on the 575 continuously enhanced metabolites and 43 continuously up-regulated *** revealed 13 genes at the key position that mapped to a putative metabolic pathway associated with the biosynthesis of polyketides and caprylic acid,which contributes to the potent anti-parasitic activity of strain *** comprehensive analysis of metabolomics and transcriptomics provides insights into the biosynthetic mechanisms of anti-parasitic compounds in strain YCSC6 and guides the exploitation of more anti-parasitic agents for aquaculture.

关键词： metabolomics transcriptomics anti-parasitic Salinivibrio proteolyticus Uronema marinum

Interactions between natural biofilm,substratum surface wettability,and mussel plantigrade settlement

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Science China Earth Sciences 2017年第2期60卷 382-390页

作者： YANG JinLong GUO XingPan ding dewen GAO Wei HUANG DaoFen CHEN YuRu LIANG Xiao Marine Ecology Research Center The First Institute of Oceanography State Oceanic AdministrationQingdao 266061China Key Laboratory of Exploration and Utilization of Aquatic Genetic Resources Shanghai Ocean UniversityMinistry of EducationShanghai 201306China Collaborative Innovation Center for Zhejiang Marine High-efficiency and Healthy Aquaculture Ningbo 315211China

Mytilus galloprovincialis is a major fouling organism in the inter-tidal ***,the interactions between *** plantigrade settlement,biofilm characteristics,and surface wettability remains ***,we examined *** plantigrade settlement responses to marine biofilms(BFs)on surfaces of varying *** significant difference in mussel settlement was observed on young BFs(7 d)on surfaces of differing wettability;while settlement decreased on older BFs(14,21,and 28 d)formed on low compared to high wettability *** wettability affected BF *** standardized harmonic mean and water contact angles values were not correlated with diatom density and chlorophyll a concentration,but were correlated with bacterial density,dry weight,and *** gradient gel electrophoresis revealed that bacterial community structure differed on BFs on surfaces of varying ***,surface wettability affects biofilm characteristics,and the subsequent changes in BF characteristics may be responsible for the variation in biofilm-inducing activity of *** plantigrade settlement.

关键词： Mytilus galloprovincialis Plantigrade settlement Biofilms Surface wettability Bacterial community

Distribution of green algae micro-propagules and their function in the formation of the green tides in the coast of Qinhuangdao,the Bohai Sea, China

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Acta Oceanologica Sinica 2019年第8期38卷 72-77页

作者： Hongbin Han Wei Song Zongling Wang dewen ding Chao Yuan Xuelei Zhang Yan Li College of Environmental Science and Engineering Ocean University of China Qingdao 266100 China Key Laboratory of Science and Engineering for Marine Ecology and Environment First Institute of Oceanography Ministry of Natural Resources Qingdao 266061 China Laboratory of Marine Ecology and Environmental Science Pilot National Laboratory for Marine Science and Technology (Qingdao) Qingdao 266235 China

Since 2015, a novel green tide has been recurring in the coastal areas of Qinhuangdao at the western coast of the Bohai Sea in China, threatening the environment and ecosystem of the Beidaihe seaside holiday resort along the coast. Micro-propagules of the green algae including gametes, spores, micro-germlings and micro-vegetative fragments play an important role in the formation of green tides. They serve as a "seed source" of green macroalgae, and their distributions could reflect and influence the "algae source" of green tides. In this study,monthly surveys in the inshore and offshore areas of the Qinhuangdao coast were conducted from April to September 2016 and in January 2017 to investigate the tempo-spatial distribution patterns and the biomass variations of the green algae micro-propagules. The obtained results show that micro-propagules were mainly distributed in the inshore areas with a significantly decreasing abundance towards offshore areas. Their biomass was highest in July and August, and lowest in winter. The areas that were affected by the green tides showed a remarkably higher abundance of micro-propagules compared to other areas. These micro-propagules could serve as the "seed" source of green tides. Their distribution patterns indicate that the green tide in the coastal areas of Qinhuangdao originated locally.

关键词： green tides micro-propagules macroalgae Qinhuangdao Bohai Sea

Microbial Remediation and Optimization of Oil Polluted Wetlands at Dalian Bay in China

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Biomedical and Environmental Sciences 2007年第5期20卷 414-419页

作者： LEI-CHANG HUANG SHU-HONG YE YU ZHANG YAO OLIVE LI XIANG-RONG WANG dewen ding Department of Environmental Science and Engineering Fudan University Shanghai 200433 China Artand Design School of Dalian Polytechnic University Datian 116034 Liaoning China Biology and Food Engineering School of Dalian Polytechnic University Dalian 116034 Liaoning China College of Marine Environment and Security Engineering Shanghai Maritime University Shanghai 200135 China Department of Chemical Engineering and Applied Chemistry University of Toronto Toronto ON Canada MsS3E5

Objective The wetland at Dalian Bay in the Northeast of China has been polluted by oil severely. The effect of various microbes and operation parameters on the bioremediation of oil-polluted wetlands at Dalian Bay was investigated and reported previously. In the study, other operation conditions related to the status of medium were investigated via statistical experimental design and analysis and a necessary information is involved to use micro-technology in the application. Methods The method used involved the direct inoculation of selected bacteria, which were capable of degrading oil. The operation conditions were further optimized and evaluated by gravimetrical assay. Results The optimal pH and temperature for the studied bacteria to degrade the existing oil pollutants were established as pH 8.0 and 27℃. The mixed of various bacteria showed better results in terms of oil degradation than any single one. Among the selected four factors, disturbance, oxidant, nutrients, and biosurfactant, the former two contributed more impacts on the oil degradation in the early stage of process, while the latter two became the limiting factors in the late stage. Three sets of optimal conditions were obtained for each individual stage, but no one was suitable for the overall process. Conclusion The study demonstrated the technical feasibility of using direct inoculation into the contaminated soil samples to remove oil pollutants. It suggested that the operation conditions should be monitored and adjusted during the different stages of bio-reactions in the process to achieve the best result of oil degradation.

关键词： Biodegradation Micro-bioremediadon Oil pollution

The contribution of attached Ulva prolifera on Pyropia aquaculture rafts to green tides in the Yellow Sea

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Acta Oceanologica Sinica 2020年第2期39卷 101-106页

作者： Hongbin Han Shiliang Fan Wei Song Yan Li Jie Xiao Zongling Wang Xuelei Zhang dewen ding Key Laboratory of Marine Eco-Environmental Science and Technology First Institute of OceanographyMinistry of Natural ResourcesQingdao 266061China College of Environmental Science and Engineering Ocean University of ChinaQingdao 266100China Laboratory of Marine Ecology and Environmental Science Pilot National Laboratory for Marine Science and Technology(Qingdao)Qingdao 266237China

Green tides caused by the unusual accumulation of high floating Ulva prolifera have occurred regularly in the Yellow Sea since *** primary source of the Yellow Sea green tides is the attached algae on the Pyropia aquaculture rafts in the Subei *** prolifera and Blidingia(Italic)*** the main species observed on Pyropia aquaculture rafts in the Subei *** found that *** has strong buoyancy and a rapid growth rate,which may explain why it is the dominant species of green tides that occur in the China's sea area of the Yellow *** growth rate of floating *** was about 20%–31%d–1,which was much higher than Blidingia(Italic)*** were about 1.7×104 t of attached algae on the Pyropia aquaculture rafts in May *** found that 39%of attached algae could float when the tide rose in the Subei Shoal,and *** accounted for 63%of the floating *** analysis estimated that about 4000 t of attached *** floated into the surrounding waters of the Subei Shoal during the recycling period of aquaculture *** results suggest that the initial floating biomass of large-scale green tides in the Yellow Sea is determined by the *** biomass attached to Pyropia aquaculture rafts,further impacting the scale of the green tide。

关键词： attached algae Pyropia aquaculture rafts Blidingia(Italic)sp. Ulva prolifera green tides

Sensitivity and Uncertainty Analysis of Regional Marine Ecosystem Services Value

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Journal of Ocean University of China 2009年第2期8卷 150-154页

作者： SHI Honghua ZHENG Wei WANG Zongling ding dewen Key Laboratory of Marine Environment and Ecology of Ministry of Education and Institute ofApplied Mathematics Ocean University of China Qingdao 266100 P. R. China First Institute of Oceanography SOA Qingdao 266061 P. R. China

Marine ecosystem services are the benefits which people obtain from the marine ecosystem,including provisioning services,regulating services,cultural services and supporting services. The human species,while buffered against environmental changes by culture and technology,is fundamentally dependent on the flow of ecosystem services. Marine ecosystem services become increasingly valuable as the terrestrial resources become scarce. The value of marine ecosystem services is the monetary flow of ecosystem services on specific temporal and spatial scales,which often changes due to the variation of the goods prices,yields and the status of marine exploitation. Sensitivity analysis is to study the relationship between the value of marine ecosystem services and the main factors which affect it. Uncertainty analysis based on varying prices,yields and status of marine exploitation was carried out. Through uncertainty analysis,a more credible value range instead of a fixed value of marine ecosystem services was obtained in this study. Moreover,sensitivity analysis of the marine ecosystem services value revealed the relative importance of different factors.

关键词： marine ecosystem ecosystem services value sensitivity analysis uncertainty analysis

Physiological performance of three calcifying green macroalgae Halimeda species in response to altered seawater temperatures

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Acta Oceanologica Sinica 2020年第2期39卷 89-100页

作者： Zhangliang Wei Jiahao Mo Ruiping Huang Qunju Hu Chao Long dewen ding Fangfang Yang Lijuan Long CAS Key Laboratory of Tropical Marine Bio-resources and Ecology South China Sea Institute of OceanologyChinese Academy of SciencesGuangzhou 510301China University of Chinese Academy of Sciences Beijing 100049China State Key Laboratory of Marine Environmental Science College of Ocean and Earth SciencesXiamen UniversityXiamen 361102China First Institute of Oceanography Ministry of Natural ResourcesQingdao 266061China

The effects of seawater temperature on the physiological performance of three Halimeda species were studied for a period of 28 *** treatments were established for Halimeda cylindracea,Halimeda opuntia and Halimeda lacunalis,in triplicate aquaria representing a factorial temperature with 24°C,28°C,32°C,34°C and 36°C,*** average Fv/Fm of these species ranged from 0.732 to 0.756 between 24°C and 32°C but declined sharply between 34°C(0.457±0.035)and 36°C(0.122±0.014).Calcification was highest at 28°C,with net calcification rates(Gnet)of(20.082±2.482)mg/(g·d),(12.825±1.623)mg/(g·d)and(6.411±1.029)mg/(g·d)for ***,*** and ***,*** 24°C and 32°C,the specific growth rate(SGR)of ***(0.079%–0.110%d–1)was lower than that of ***(0.652%–1.644%d–1)and ***(0.360%–1.527%d–1).Three Halimeda species gradually bleached at 36°C during the study ***(MDA)and proline levels in tissues of the three Halimeda were higher in 34–36°C than those in 24–32°*** results indicate that seawater temperature with range of 24–32°C could benefit the growth and calcification of these Halimeda species,however,extreme temperatures above 34°C have negative *** measured physiological parameters also revealed that *** and *** displayed broader temperature tolerance than ***.

关键词： calcifying macroalgae climate change seawater temperature physiological performance photosynthesis calcification