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Science China Earth Sciences 2017年第2期60卷 391-396页

作者： LI Jing SUN Lei YU ZhiMing song xiuxian Key Laboratory of Marine Ecology and Environmental Sciences Institute of OceanologyChina Academy of Science Laboratory of Marine Ecology and Environmental Science Qingdao National Laboratory for Marine Science and Technology College of Earth Sciences University of Chinese Academy of Sciences College of Environmental Science and Engineering Ocean University of China

Prevention of annual"green tides"caused by blooms of the green macroalga Ulva prolifera,which have occurred in the Yellow Sea since 2007,has received much *** evidence indicates that micro-propagules on the rafts used for Porphyra yezoensis aquaculture along the coastline of Jiangsu Province in China,were the primary source of these green *** this study,we investigated the effectiveness of a silicone antifouling coating for preventing the adhesion and germination of *** micro-propagules on bamboo and nylon ropes,which have been used in rafts for *** *** results demonstrated that a coating of silicone(Sylgard 184)containing 1.0 wt.%sodium benzoate(NaB)could reduce the adhesion rate to<5%and completely inhibited the growth of *** propagules on the coated *** bamboo and nylon ropes with NaB-incorporated silicone thus proved a potentially effective method for controlling the initial biomass accumulation of ***.

关键词： Ulva prolifera Green tide Silicone Sodium benzoate Biofouling

Diatom-based dissolved inorganic nitrogen reconstruction in the Changjiang River estuary and its adjacent areas

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Journal of Oceanology and Limnology 2023年第4期41卷 1464-1480页

作者： Xin FAN Fangjin CHENG Zhiming YU xiuxian song College of Naval Architecture and Port Engineering Shandong Jiaotong UniversityWeihai 264209China CAS Key Laboratory of Marine Ecology and Environmental Sciences Institute of OceanologyChinese Academy of SciencesQingdao 266071China Laboratory of Marine Ecology and Environmental Science Pilot National Laboratory for Marine Science and Technology(Qingdao)Qingdao 266237China University of Chinese Academy of Sciences Beijing 100049China Environmental Monitoring Center of Qingdao Qingdao 266003China

A five-component weighted average partial least squares(WA-PLS)calibration model was developed by analysing diatom assemblages in 34 surface sediment samples(collected in 2015)from the Changjiang River estuary(CRE)and its adjacent areas to infer dissolved inorganic nitrogen(DIN)*** additional sets of surface sediment diatoms and corresponding upper water DIN data(collected in 2012)were used to evaluate the accuracy of the model,and the relationship between observed and diatom-inferred DIN(DI-DIN)values(R2=0.85)illustrated the strong performance of the transfer function,indicating that precise reconstructions of former DIN are *** diatom-DIN transfer function was applied to the diatom record from a sediment core DH8-2(1962‒2012)collected in the Fujian-Zhejiang area south of the *** reconstruction based on the DI-DIN model showed a significant DIN increase from 1962-2012,reflecting the influence of human activities on the very large increase in *** distinct periods can be seen from the changes in DIN and diatom *** the 1962-1972 period,the DIN content was relatively low,with an average of 5.94μmol/L,and more than 80%of the diatom species identified were benthic *** the 1972-2004 period,as the impact of human activities intensified,large nutrient inputs caused the DIN content to increase,with an average of 8.25μmol/*** nutrient inputs also caused a significant change in the nutrient components and a distinct increase in small planktonic *** the 2004-2012 period,the DIN content continued to rise,fluctuating at approximately 10μmol/L.A continuous increase in the frequency of planktonic taxa(up to 65.48%)indicated that eutrophication was further intensified,which was confirmed by the transformation from diatom-induced red tide to dinoflagellate-induced red tide during this period.

关键词： Changjiang River estuary dissolved inorganic nitrogen(DIN)reconstruction diatoms transfer function

Flocculation of Ulva microscopic propagules using modified clay:a mesocosm experiment

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Journal of Oceanology and Limnology 2020年第4期38卷 1283-1291页

作者： LI Jing song xiuxian FAN Xin YU Zhiming CAS Key Laboratory of Marine Ecology and Environmental Sciences Institute of OceanologyChinese Academy of SciencesQingdao 266071China Laboratory of Marine Ecology and Environmental Science Qingdao National Laboratory for Marine Science and TechnologyQingdao 266237China University of Chinese Academy of Sciences Beijing 100049China Center for Ocean Mega-Science Chinese Academy of SciencesQingdao 266071China

Microscopic propagules of Ulva species(UMPs)spread on Subei Shoal are believed to play a significant role in the formation of the Yellow Sea green *** laboratory and ship-based studies indicated that modified clay(MC)can effectively remove UMPs from the water column and restrict their *** evaluate the effectiveness of this method under natural conditions,a mesocosm experiment was conducted on the Zhugensha sandbank on Subei *** results show that the suspended particles on the sandbank would partially disturb the flocculation process between the MC and ***,the MC at a proper dose could effectively remove UMPs from the water column and decrease the adhesion and germination of UMPs on the nylon ropes that comprised the mariculture rafts by>75%.This method was proven a potential strategy to restrict the initial biomass accumulation of green algae on Subei ***,field trials in larger time-space scales are still needed to assess the efficiency of this method when used in the open sea.

关键词： green tide Ulva modified clay microscopic propagules

The environmental implication of diatom fossils in the surface sediment of the Changjiang River estuary(CRE) and its adjacent area

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Journal of Oceanology and Limnology 2019年第2期37卷 552-567页

作者： FAN Xin CHENG Fangjin YU Zhiming song xiuxian CAS Key Laboratory of Marine Ecology and Environmental Sciences Institute of Oceanology Chinese Academy of SciencesQingdao 266071 China Laboratory of Marine Ecology and Environmental Science Qingdao National Laboratory for Marine Science and Technology Qingdao 266071 China University of Chinese Academy of Sciences Beijing 100049 China Environmental Monitoring Center of Qingdao Qingdao 266003 China

In order to depict the distribution of diatom fossils in surface sediments and to establish a reliable reference data for further paleoenvironmental study in the Changjiang (Yangtze) River estuary and its adjacent waters, the diatom fossils from 34 surface sediment samples and their relationship with environmental variables were analyzed by principal component analysis and redundancy correspondence analysis. The diversity and abundance of diatom fossils were analyzed. Some annual average parameters of the overlying water (salinity, temperature, turbidity, dissolved oxygen, depth, dissolved inorganic nitrogen, dissolved inorganic phosphate and dissolved inorganic silicate) were measured at each sampling site. A total of 113 diatom taxa and one silicoflagellate species were identified in the investigation area. Diatom fossils were better preserved in fine sediments. The absolute abundance of diatom fossils did not significantly diff er between inshore and off shore areas, the species diversity decreased from inshore to off shore. This may be because high nutrients and low salinity promoted the growth of more brackish species in coastal waters. The diatom taxa were divided into three groups, on the basis of their response and indication to environmental changes. For example, Actinocyclus ehrenbergii and Cyclotella stylorum were dominant in coastal waters (Group 1 and Group 3) with high nutrients and low salinity;the relative abundances of Paralia sulcata and Podosira stelliger were significantly higher in off shore sites (Group 2, average 39.5%), which were characterized by high salinity and deep water. Four environmental variables (salinity, dissolved inorganic nitrogen, temperature and water depth) explained the composition and distribution of diatom taxa independently ( P< 0.05), this finding can be applied in further paleoenvironmental reconstruction research in this area.

关键词： diatom fossils Changjiang River estuary surface sediments environmental variables

Influences of external nutrient conditions on the transcript levels of a nitrate transporter gene in Skeletonema costatum

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Acta Oceanologica Sinica 2013年第6期32卷 82-88页

作者： LIU Yun song xiuxian HAN Xiaotian YU Zhiming Key Laboratory of Marine Ecology and Environmental Sciences Institute of Oceanology Chinese Academy of Sciences Graduate School of the Chinese Academy of Sciences

To verify the feasibility of high-affinity nitrate transporter gene （Nrt2） as an indicator of nitrogen status, changes in the transcript levels of transcripts associated with phosphate starvation and different nitrate concentrations were studied using real-time quantitative reverse-transcription PCR （QRT-PCR） technology in batch cultures of Skeletonema costatum. The results show that compared with P-replete condition, P starvation could reduce the Nrt2 transcript levels apparently. Nrt2 transcript levels had a significant negative linear correlation with nitrate concentrations below 40 pmol/L. The results of 48 h short-term incubation experiment under different nitrate concentrations confirmed this correlation, and the following regression equation is built： y = -3.305x ＋ 98.95, R2 = 0.988, where x represents nitrate concentrations （〈40 btmol/L） and y represents the Nrt2 transcript levels.

关键词： high-affinity nitrate transporter gene phosphate starvation nitrate concentrations real-time PCR Skeletonema costatum

Application and comparison of two symptom-based eutrophication-assessment methods in Jiaozhou Bay, China

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Journal of Oceanology and Limnology 2019年第5期37卷 1582-1594页

作者： WU Zaixing YU Zhiming song xiuxian CAO Xihua YUAN Yongquan Key Laboratory of Marine Ecology and Environmental Science Institute of OceanologyChinese Academy of SciencesQingdao 266071China Laboratory of Marine Ecology and Environmental Science Qingdao National Laboratory for Marine Science and TechnologyQingdao 266237China Center for Ocean Mega-Science Chinese Academy of SciencesQingdao 266071China University of Chinese Academy of Sciences Beijing 100049China

Increasing numbers of approaches to assess eutrophication, such as estuarine trophic status, the Oslo-Paris Commission Common Procedure, and the Water Framework Directive, focus on the symptoms of eutrophication. In China, however, nutrient index methods dominate the assessment of coastal waters. In this study, an integrated method that includes both water quality and ecological response was compared with the Northwest Pacifi c Action Plan (NOWPAP) Common Procedure. Observation data from Jiaozhou Bay, Shandong, China, were used in a comparison of the two methods in a trophic status study. Overall, both clearly revealed a high level of nutrient enrichment in the bay, indicated by high nutrient concentrations. Though the two methods diff ered in their methodological design in the assessment of the ecological eff ects of nutrient enrichment, they have acquired similar results: the integrated method suggested that the status was good, and the NOWPAP Common Procedure suggested that the status was low (indicating that the bay had no serious eutrophication problem). The introduction of fi lter feeders (shellfi sh aquaculture) into the bay on a reasonable scale may have been eff ective in mitigating eutrophic conditions, and perhaps explains the low ecological impacts there. Our results will be useful to ecosystem-based eutrophication management in the bay and in similar areas.

关键词： eutrophication assessment integrated methodology Northwest Pacifi c Action Plan (NOWPAP) Common Procedure Jiaozhou Bay

Programmed cell death induced by modified clay in controlling Prorocentrum donghaiense bloom

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Journal of Environmental Sciences 2021年第11期33卷 123-134页

作者： Hena Ji Zhiming Yu Liyan He Jianan Zhu Xihua Cao xiuxian song CAS Key Laboratory of Marine Ecology and Environmental Sciences Institute of OceanologyChinese Academy of SciencesQingdao 266071China Laboratory of Marine Ecology and Environmental Science Qingdao National Laboratory for Marine Science and TechnologyQingdao 266237China University of Chinese Academy of Sciences Beijing 100049China Center for Ocean Mega-Science Chinese Academy of SciencesQingdao 266071China

Modified clay(MC),an effective material used for the emergency elimination of algal blooms,can rapidly reduce the biomass of harmful algal blooms(HABs)via *** that,MC can still control bloom population through indirect effects such as oxidative stress,whichwas initially proposed to be related to programmedcell death(PCD)at molecular *** further study theMC induced cell death in residual bloom organisms,especially identifying PCD process,we studied the physiological state of the residual Prorocentrum *** experimental results showed that flocculation changed the physiological state of the residual cells,as evidenced by growth inhibition and increased reactive oxygen species ***,this research provides biochemical and ultrastructural evidence showing that MC induces PCD in *** changes were observed,and increased caspase-like activity,externalization of phosphatidylserine and DNA fragmentation were detected in MC-treated groups and *** the mitochondrial apoptosis pathway was activated in both MC-treated ***,the features of MC-induced PCD in a unicellular organism were summarized and its concentration dependent manner was *** our preliminary results elucidate the mechanism through which MC can further control HABs by inducing PCD and suggest a promising application of PCD in bloom control.

关键词： Modified clay Prorocentrum donghaiense Programmed cell death Harmful algal blooms

Profiles of and variations in aluminum species in PAC-MC used for the removal of blooming microalgae

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Journal of Environmental Sciences 2021年第8期33卷 76-82页

作者： Xueyi Dong Xihua Cao Wenbin Jiang xiuxian song Zhiming Yu Shitao Yu College of Chemical Engineering Qingdao University of Science and TechnologyQingdao 266042China CAS Key Laboratory of Marine Ecology and Environmental Sciences Institute of OceanologyChinese Academy of SciencesQingdao 266071China Functional Laboratory of Marine Ecology and Environmental Science Qingdao National Laboratory for Marine Science and TechnologyQingdao 266237China University of Chinese Academy of Science Beijing 100049China Center for Ocean Mega-Science Chinese Academy of SciencesQingdao266071China

Polyaluminum chloride modified clay(PAC-MC)is a safe and efficient red tide control agent that has been studied and applied *** it is well known that the distribution of hydrolytic aluminum species in PAC affects its flocculation,little is known about the influence of particulars aluminum species on the microalgae removal efficiency of PAC-MC;this lack of knowledge creates a bottleneck in the development of more efficient MCs based on aluminum *** ferron method was used in this study to quantitatively analyze the distributions of and variations in different hydrolytic aluminum species during the process of microalgae removal by *** results showed that Ala,which made up 5%–20%of the total aluminum,and Alp,which made up 15%–55%of the total aluminum,significantly affected microalgae removal,with Pearson’s correlation coefficients of 0.83 and 0.89,*** of the aluminum in the PAC-MC sank rapidly into the sediments,but the rate and velocity of settlement were affected by the dose of modified *** optimal dose of PAC-MC for precipitating microalgae was determined based on its aluminum *** results provide guidance for the precise application of PAC-MC in the control of harmful algal blooms.

关键词： Modified clay Red tide Aluminum species Microalgal removal efficiency Ecological safety

The mechanism of a new type of modified clay controlling Phaeocystis globosa growth

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Journal of Oceanology and Limnology 2020年第4期38卷 1270-1282页

作者： QIU Lixia YU Zhiming CAO Xihua JI Hena song xiuxian CAS Key Laboratory of Marine Ecology and Environmental Sciences Institute of OceanologyChinese Academy of SciencesQingdao 266071China Laboratory of Marine Ecology and Environmental Science Qingdao National Laboratory for Marine Science and TechnologyQingdao 266071China University of Chinese Academy of Sciences Beijing 100049China Center for Ocean Mega-Science Chinese Academy of SciencesQingdao 266071China

Phaeocystis globosa is a harmful algal bloom(HAB)species *** modified clay(MC)to control HABs and to mitigate their adverse effects is currently a commonly used method in *** this paper,the effects of oxidized composite modified clay(OXI-MC)on *** were studied from different *** results show that the OXI-MC could effectively remove *** and inhibit both the growth of residual algal cells and the formation of new *** *** algal biomass removal efficiencies after 3 h reached 90%at a dose of 0.1 g/L,and the number of colonies with different particle sizes was greatly *** with those of the control,the superoxide dismutase(SOD)activity,catalase(CAT)activity,and malondialdehyde(MDA)content of the residual algae significantly increased,indicating that OXI-MC caused oxidative stress in the algal *** addition,we evaluated the effects of OXI-MC on the photosynthesis of residual microalgae and found that the maximal photochemical efficiency of photosystem II(PSII)under dark adaptation(F v/F m)and actual photochemical efficiency of PSII(ФPSII)decreased,severely damaging the photosynthesis efficiency,implying that OXI-MC effected the photosynthesis system of *** results of this study clarify that OXI-MC could remove the most of algal cells and break up the colonies of *** by collision,flocculation,and releasing active substances,as well as inhibit effectively the growth and colony formation of residual *** by causing oxidative stress,reducing photosynthesis activity,accelerating the degradation of polysaccharides,and inhibiting the formation of colonies.

关键词： Phaeocystis globosa modified clay colony disruption oxidative stress photosynthesis

Impact assessment of modified clay on embryo-larval stages of turbot Scophthalmus maximus L.

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Journal of Oceanology and Limnology 2019年第3期37卷 1051-1061页

作者： ZHANG Yue song xiuxian YU Zhiming ZHANG Peipei CAO Xihua YUAN Yongquan CAS Key Laboratory of Marine Ecology and Environmental Sciences Institute of OceanologyChinese Academy of SciencesQingdao 266071China Laboratory of Marine Ecology and Environmental Science Qingdao National Laboratory for Marine Science and TechnologyQingdao 266237China University of Chinese Academy of Sciences Beijing 100049China Center for Ocean Mega-Science Chinese Academy of SciencesQingdao 266071China

Using modified clay is one of the most promising methods for the mitigation of harmful algal blooms(HABs).However,the environmental impact of modified clay has become a subject of global *** this study,turbot(Scophthalmus maximus L.)embryos were used as a model to assess the effect of modified clay on this sensitive stage of fish *** show that the 24 and 48h LC 50(median lethal concentrations)of the modified clay were 1.70 and 1.65 g/L,and the safe concentration was 0.47 g/L,which is much higher than the concentration used to treat *** modified clay did not affect significantly the hatchability of turbot embryos but when the concentration exceeded 0.50 g/L,the deformity rate of newly hatched larvae increased *** total length,specific growth rate(SGR)and yolk sac absorption rate of larvae reached their peaks at 0.50 g/L and then gradually decreased as the concentration of modified clay ***,a moderate amount of modified clay does not harm the survival and hatching of turbot embryos,or the growth and development of newly hatched larvae.

关键词： modified clay turbot embryo larvae survival growth