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| 1 | Seasonal Variations of Net-Phytoplankton Community Structure in the Southern Yellow Sea显示文摘Based on the field survey data of four cruises in 2011,all phytoplankton communities in the southern Yellow Sea (SYS) were investigated for the species composition,dominant species,abundance and diversity indices.A total of 379 species belonging to9 phyla were identified,of which the most abundant group was Bacillariophyta (60.9%) ,followed by Pyrrophyta (23.7%) and Haptophyta (6.9%) .The seasonal distribution of abundance was:summer (4137.1×103ind m 3) >spring (3940.4×103ind m 3) >winter (3010.6×103ind m 3) >autumn (340.8×103ind m 3) ,while the horizontal distribution showed a decreasing tendency from inshore to offshore regions.The dominant species of phytoplankton varied in different seasons.The dominant species were Thalassiosira pacifica,Skeletoema spp.and Chaetoceros cinctus in spring,Chaetoceros debbilis,Chaetoceros pseudocurvisetus and Chaetoceros curvisetus in summer,Thalassiosira curviseriata,Alexandrium catenella and Ceratium fusus in autumn,Paralia sulcata,Phaeocystis sp.and Bacillaria paradoxa in winter,respectively.In SYS,the group of temperate coastal species was the major ecotype,and the groups of the central SYS species and oceanic species were also important constituents.The average values of Shannon-Weaver diversity index (H’) and Pielou evenness index (J) were 2.37 and 0.65 respectively.The indices H’and J in the open sea were higher than those in coastal waters.Obvious co-variation tendencies between H’and J were observed in all but the summer cruise of this survey. | GAO Yu JIANG Zhibing LIU Jingjing CHEN Quanzhen ZENG Jiangning HUANG Wei | 2013 | Journal of Ocean University of China2013，12，4： | 10 |
| 2 | The decay kinetics of residual chlorine in cooling seawater simulation experiments显示文摘To find out the decay character of residual chlorine (RC) in the sea water, the concentration of RC was analyzed by N, N-diethyl-p-phenylenediamine (DPD) method under different simulation experimental conditions, in which salinity, temperature, and Chemical Oxygen Demand (COD) were selected. The water used in the experiment was the mixture of aging ocean water, coastal water and extracting solution of coastal sediment at appropriate level. Results are shown as follows: (1) Piecewise function can well reffect the decay dynamics of RC in the cooling seawater. Concretely, the decay dynamics of first 1 min is too rapid to ascertain using a specific kinetic function, and that of the time from 1 to 30 min is fit for the first-order kinetic model. (2) The results could be the foundation of the chemical behavior of RC in seawater, and be used as not only the guidance of the coastal power plants production and sea water desalting companies, but also the establishment of the correlative trade standard. | ZENG Jiangning JIANG Zhibing CHEN Quanzhen ZHENG Ping HUANG Yijun | 2009 | Acta Oceanologica Sinica2009，28，2： | 2 |
| 3 | Sustainable Utilization of Agricultural Straw for Harmful Algal Blooms Control:A Review显示文摘The use of agricultural straw for algal bloom control has been studied for more than 30 years.In this article,we have reviewed the promising potentials of using agricultural straw as source of anti-algal agents,including the effectiveness of each major straw type so far used in this regard,and the investigated algal species.Various pre-treatment methods have also been widely reviewed.Significant progress has been made in natural product chemistry and molecular biology with regards to agricultural straw,especially in relation to the extraction of antialgal allelochemicals,degradation processes of agricultural straws and the mechanisms through which these inhibitions occur.The development of biotechnologies using agricultural straw to successfully inhibit growth of bloom forming algae has been generally accepted as environmentally friendly.The current research status and that of the future should include isolation and discovery of antialgal allelochemicals,development of models that would illustrate the sequence of physiologic events that match the species-specific inhibitor phenomenon,and products fit in the field applications. | Kokoette Effiong Jing Hu Caicai Xu Tao Tang Haomin Huang Jiangning Zeng Xi Xiao | 2020 | Journal of Renewable Materials2020，8，5： | 2 |
| 4 | Seasonal Variability of Phytoplankton Community Structure in Relation to Different Nitrogen-Phosphorus Ratios in the Southern Coastal Waters of Zhejiang, China显示文摘With the rapid development of economy and increase of population in the drainage areas,the nutrient loading has increased dramatically in the Changjiang estuary and adjacent coastal waters.To properly assess the impact of nutrient enrichment on phytoplankton community,seasonal microcosm experiments were conducted during August 2010 July 2011 in the coastal waters of Zhejiang Province.The results of the present study indicated that the chl a concentration,cell abundance,diversity indices,species composition and community succession of the phytoplankton varied significantly with different N/P ratios and seasons.Higher growth was observed in the 64:1(spring),32:1(summer),16:1(autumn)and 128:1,256:1(winter)treatments,respectively.The values of Shannon-Wiener index(H′)and Pielou evenness index(J)were lower in the 8:1 and 16:1 treatments in autumn test,while H'value was higher in the 128:1 and 8:1 treatments in winter test.A definite community succession order from diatoms to dinoflagellates was observed in the autumn and winter tests,while the diatoms dominated the community throughout the culture in the spring and summer tests. | HUANG Wei ZHU Xuyu CHEN Quanzhen HE Qing LIAO Yibo DU Ping ZHANG Peng ZENG Jiangning | 2013 | Journal of Ocean University of China2013，12，4： | 2 |
| 5 | Partial function prediction of sulfate-reducing bacterial community from the rhizospheres of two typical coastal wetland plants in China显示文摘Sulfate-reducing bacteria(SRB)are ubiquitous anaerobic microorganisms that play signifi cant roles in the global biogeochemical cycle.Coastal wetlands,one of the major habitats of SRB,exhibit high sulfate-reducing activity and thus play signifi cant roles in organic carbon remineralization,benthic geochemical action,and plant-microbe interactions.Recent studies have provided credible evidence that the functional rather than the taxonomic composition of microbes responds more closely to environmental factors.Therefore,in this study,functional gene prediction based on PacBio single molecular real-time sequencing of 16S rDNA was applied to determine the sulfate-reducing and organic substrate-decomposing activities of SRB in the rhizospheres of two typical coastal wetland plants in North and South China:Zostera japonica and Scirpus mariqueter.To this end,some physicochemical characteristics of the sediments as well as the phylogenetic structure,community composition,diversity,and proportions of several functional genes of the SRB in the two plant rhizospheres were analyzed.The Z.japonic a meadow had a higher dissimilatory sulfate reduction capability than the S.mariqueter-comprising saltmarsh,owing to its larger proportion of SRB in the microbial community,larger proportions of functional genes involved in dissimilatory sulfate reduction,and the stronger ability of the SRB to degrade organic substrates completely.This study confi rmed the feasibility of applying microbial community function prediction in research on the metabolic features of SRB,which will be helpful for gaining new knowledge of the biogeochemical and ecological roles of these bacteria in coastal wetlands. | Xiaoyue SONG Jiangning ZENG Yi ZHOU Quanzhen CHEN Hongsheng YANG Lu SHOU Yibo LIAO Wei HUANG Ping DU Qiang LIU | 2021 | Journal of Oceanology and Limnology2021，39，1： | 0 |
| 6 | Response of Arctic marine microalgae to changes of salinity显示文摘An algal assemblage collected from the bottom of floe in the Greenland Sea was batchcultured at 1±1℃ and 10 salinity gradients varied from 4 0 to 90 8 for 19 d.The growth for both the algal community and individual populations was characterized by an initial lag phase of six days followed by positive growth.Maximum growth rates were obtained as 0 19/d for the algal community and 0 32 to 0 39 d -1 for individual populations for the whole experiment period,which mostly occurred at the lower salinities.The competition between the algal species and the evolution of the algal assemblages under the salinity changes was checked.After 14 d culture,the dominating algae in the lower salinities were centric diatoms,pennate diatoms and phytoflagellates,while ones in the higher salinities almost belonged to pennate diatoms.It is suggested that the sea ice algal community from the Greenland Sea prefer lower salinities to higher ones,and the decrease in salinity in small ranges could stimulate the growth of sea ice algae. | Zhang Qing 1,Rolf Gradinger 2,Zhou Qingsong 1,Zeng Jiangning 11.La-bo-ratoryofOceanDynamicProcessesandSatelliteOceanography,SecondInstituteofOceanography,StateOceanicAdministration,Hangzhou310012,China2.InstituteofPolarEcology,KielUniversity,D24148Kie | 2001 | Acta Oceanologica Sinica2001，20，1： | 0 |
| 7 | Distinct root system acclimation patterns of seagrass Zostera japonica in sediments of different trophic status:a research by X-ray computed tomography显示文摘Conspecific seagrass living in differing environments may develop different root system acclimation patterns.We applied X-ray computed tomography(CT)for imaging and quantifying roots systems of Zostera japonica collected from typical oligotrophic and eutrophic sediments in two coastal sites of northern China,and determined sediment physicochemical properties that might influence root system morphology,density,and distribution.The trophic status of sediments had little influence on the Z.japonica root length,and diameters of root and rhizome.However,Z.japonica in oligotrophic sediment developed the root system with longer rhizome node,deeper rhizome distribution,and larger allocation to below-ground tissues in order to acquire more nutrients and relieve the N deficiency.And the lower root and rhizome densities of Z.japonica in eutrophic sediment were mainly caused by fewer shoots and shorter longevity,which was resulted from the more serious sulfide inhibition.Our results systematically revealed the effect of sediment trophic status on the phenotypic plasticity,quantity,and distribution of Z.japonica root system,and demonstrated the feasibly of X-ray CT in seagrass root system research. | Xiaoyue SONG Yi ZHOU Jiangning ZENG Lu SHOU Xiaomei ZHANG Shidong YUE Wei GAO Weihua FENG Zhifu WANG Ping DU | 2021 | Journal of Oceanology and Limnology2021，39，6： | 0 |
| 8 | Seasonal and regional diff erences in long-term changes in large mesozooplankton(>505μm)biomass and abundance in a semi-enclosed subtropical bay显示文摘Obvious spatiotemporal heterogeneity is a distinct characteristic of ecosystems in subtropical bays.To aid targeted management and ecological restoration in long and narrow semi-enclosed subtropical bays,we analyzed seasonal and regional differences in long-term changes(1980-2019)in the biomass and abundance of large mesozooplankton(LMZ;>505μm)in Xiangshan Bay,Zhejiang,China.We found spatiotemporal heterogeneity in the historical changes of LMZ.Significant negative trends in LMZ biomass were found in the inner and middle bay during the warm season(summer and autumn),when the nutrient concentration(especially dissolved inorganic nitrogen)and temperature increased simultaneously.Nutrient changes in Xiangshan Bay began in the late 1980s or early 1990s,coinciding with large-scale fish cage development.A rapid decline in LMZ biomass occurred after 2005 when power plants commenced operation,accelerating the warming trend.Therefore,the joint stress of eutrophication and warming likely precipitated the decline in LMZ biomass.Conversely,a significant increase in LMZ biomass was found in the outer bay in spring.This trend was consistent with the trend of LMZ biomass near the Changjiang(Yangtze)River estuary,which indicates that the pelagic ecosystem in the outer bay was aff ected by water from the Changjiang River estuary during spring.Based on our results,ecosystem management and restoration in semi-enclosed subtropical bays should focus on internal waters,which have a poor capacity for water exchange.For Xiangshan Bay,the changes in the Changjiang River estuary ecosystem during the cold season(winter and spring)should also be considered. | Ping DU Zhibing JIANG Yuanli ZHU Yibo LIAO Quanzhen CHEN Jiangning ZENG Lu SHOU | 2021 | Journal of Oceanology and Limnology2021，39，6： | 0 |
| 9 | The Ecological Distributions of N, P Utilizing Bacteria and Heterotrophic Bacteria in the Moderate Hypoxia Zone of the Changjiang Estuary显示文摘The distributions of N utilizing bacteria (denitrifying bacteria and ammonifying bacteria) ,P utilizing bacteria (organic phosphobacteria and inorganic phosphobacteria) and heterotrophic bacteria in the Changjiang Estuary,and the roles of main environmental factors in distributing bacteria,are explored with observations from two cruises in June and August 2006.Comparisons between the two important periods of initial hypoxia phase (June) and developed hypoxia phase (August) show differences in both bacterial distributions and the associated main environmental factors.First,the primary group of ammonifying bacteria has larger magnitude with spatial maximum value in the hypoxic stations related to sediment in August.The phosphobacterial abundance and detection rates in August are much lower than those in June,but the denitrifying bacterial abundance becomes greater in August.However,the difference of heterotrophic bacterial abundance between June and August is not obvious.Second,main environmental factors influencing bacteria vary from initial hypoxia phase to developed hypoxia phase.Two parameters (salinity and NO3) in surface water and five environmental parameters (pH,salinity,PO43,NO3and temperature) in bottom water and surface sediment play major roles in the bacterial abundance in June,while different parameter combinations (salinity and PO43) in surface water and different parameter combinations (DO,DOC,NO3,PO43 and pH) in bottom water and surface sediment play major roles in August.Moreover,the bottom bacteria distributions in area south of 31 N are related to the position of the Taiwan Warm Current in June.The bacterial abundance and distribution may respond to the environmental change in the hypoxia processes of initial phase and developed phase.During the hypoxia processes,the whole structure of bacterial functional groups probably turns to different states,causing the recycling of nutrient regeneration and aggravating hypoxia regionally. | LIU Jingjing DU Ping ZENG Jiangning CHEN Quanzhen SHOU Lu LIAO Yibo JIANG Zhibing | 2013 | Journal of Ocean University of China2013，12，4： | 0 |
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