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冬季南海北部陆架锋区悬浮颗粒态硅的分析

海洋学报 2009年第5期31卷 31-39页

作者：鲁超刘素美任景玲陈琪罗忻李建兵张经中国海洋大学海洋化学理论与工程技术教育部重点实验室山东青岛266100 国家海洋局第二海洋研究所海洋动力和卫星遥感重点实验室浙江杭州310012 华东师范大学河口海岸动力沉积和动力地貌综合国家重点实验室上海200062

对冬季南海北部陆架锋区的悬浮颗粒态生物硅(Particulate Biogenic Silica,PBSi)和成岩硅(lithogenic Silica,LSi)含量进行了调查分析,讨论了悬浮颗粒态生物硅分布及其影响因素。结果表明,南海北部陆架区悬浮颗粒态生物硅和成岩硅平均... 详细信息

对冬季南海北部陆架锋区的悬浮颗粒态生物硅(Particulate Biogenic Silica,PBSi)和成岩硅(lithogenic Silica,LSi)含量进行了调查分析,讨论了悬浮颗粒态生物硅分布及其影响因素。结果表明,南海北部陆架区悬浮颗粒态生物硅和成岩硅平均含量分别为0.59和8.93μmol/dm3。生物硅分布与水团关系密切:在营养盐充足的沿岸水生物硅含量高(1.0μmol/dm3);而在营养盐缺乏的陆架表层水生物硅含量低(0.2.μmol/dm3);在两种水团过渡区生物硅含量居中(0.65μmol/dm3)并与溶解硅酸盐(Dissolved Silicate,DSi)成显著正相关(R=0.48,N=44,P=0.001,a=0.01)。此外锋面位置也直接影响生物硅的含量与分布。大部分调查海区被高温高盐低营养盐海水占据,因此导致了调查海区以低浓度的生物硅和成岩硅为特征,且与世界其他海区相比,生物硅含量处于低值区。

关键词：生物硅成岩硅分布陆架锋南海北部

Differential physiological responses of the coastal cyanobacterium Synechococcus sp. PCC7002.to elevated pCO2.at lag, exponential,and stationary growth phases

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Science China Earth Sciences 2018年第10期61卷 1397-1405页

作者： Shanli MOU Gang li Hongmei li Fazhong li Zhisheng SHAO Jinsong li Changfeng QU Yongyu ZHANG Key Laboratory of Biofuels Shandong Provincial Key Laboratory of Energy Genetics Qingdao Institute of Bioenergy and Bioprocess Technology Chinese Academy of SciencesQingdao 266101China Key Laboratory of Tropical Marine Bio-resources and Ecology South China Sea Institute of Oceanology Chinese Academy of SciencesGuangzhou 510301 China Zhanjiang Branch of China National Offshore Oil Corporation Ltd. Zhanjiang 524000 China Key Laboratory of Marine Bioactive Substance the First Institute of OceanographyState Oceanic AdministrationQingdao 266061 China

We studied the effects of expected end-of-the-century p CO_2.1000 ppm)on the photosynthetic performance of a coastal marine cyanobacterium Synechococcus ***7002.during the lag,exponential,and stationary growth *** p CO_2.ignificantly stimulated growth,and enhanced the maximum cell density during the stationary *** ambient p CO_2.onditions,the lag phase lasted for 6 days,while elevated p CO_2.hortened the lag phase to two days and extended the exponential phase by four *** elevated p CO_2.ncreased photosynthesis levels during the lag and exponential phases,but reduced them during the stationary ***,the elevated p CO_2.educed the saturated growth light(Ik)and increased the light utilization efficiency(α)during the exponential and stationary phases,and elevated the phycobilisome:chlorophyll a(Chl a)***,the elevated p CO_2.educed the particulate organic carbon(POC):Chl a and particulate organic nitrogen(PON):Chl a ratios during the lag and stationary phases,but enhanced them during the exponential ***,Synechococcus showed differential physiological responses to elevated p CO_2.uring different growth phases,thus providing insight into previous studies that focused on only the exponential phase,which may have biased the results relative to the effects of elevated p CO_2.n ecology or aquaculture.

关键词： Elevated pCO2 Lag Exponential and stationary phases Photosynthetic performance Synechococcus

Geometries and mechanism of folds in sediments on the southern Huanghai Sea shelf

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Acta Oceanologica Sinica 2006年第4期25卷 23-31页

作者： li Xishuang liU Baohua ZHAO Yuexia li Sanzhong Earth Science College Ocean University of China Qingdao 266003 China Key Laboratory of Marine Sedimentology ＆ Environmental Geology of state oceanic administration Qingdao 266061 China first institute of {2. State Oceanic Administration Qingdao 266061 China

Most descriptions and studies about folds have been associated with consolidated strata; fold deformation in loosely-consolidated sediments, however, has been rarely discussed. Since the Pleistocene, tectonic activities have been intensive over the South Huanghai Sea （SHS） shelf, resulting in fold deformation features that are preserved in thick sediment layers. Four types of folds with different geometries have been identified on the basis of an analysis of single - channel seismic profiles from the SHS shelf region：（1） fault-propagation fold; （2. fault-drag fold; （3） transversal bending fold; and （4） multi-action-folding fold. Studies on the geometry and mechanism of the folds indicate that base faults and fault blocks control the folding patterns in loosely-consoli- dated sediments on the SHS shelf and a large quantity of pore water in sediments plays an important role in cansing the deformation of sediment layers. The continuity of deformations of fault-propagation fold and fault-drag fold indicates that there is a genetic relationship between these fold types. The potential of earthquakes induced by fault-propagation folding in the deformation zone should be taken into account in the assessment of the marine engineering geology conditions of the SHS shelf.

关键词： fold loosely-consolidated sediment base fault marine engineering south Huanghai Sea shelf

Genome-wide transcriptional response of the Arctic bacteriumPseudoalteromonas sp. A2.to oxidative stress induced byhydrogen peroxide

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Acta Oceanologica Sinica 2016年第12期35卷 73-80页

作者： liN Xuezheng WANG Zhena li Yang li Jiang Key Laboratory of Marine Bioactive Substances the First Institute of Oceanography State Oceanic Administration Qingdao 266061 China

Oxidative stress is one of the major challenges faced by Arctic marine bacteria due to the high oxygen concentration of seawater, low temperatures and UV radiations. Transcriptome sequencing was performed to obtain the key functional genes involved in the adaptation to oxidative stress induced by hydrogen peroxide in the Arctic bacterium Pseudoalteromonas sp. A2. Exposure to 1 mmol/L H2.2.resulted in large alterations of the transcriptome profile, including significant up-regulation of 109 genes and significant down-regulation of 174 genes. COG functional classification revealed that among the significantly regulated genes with known function categories, more genes belonging to posttranslational modification, protein turnover and chaperones were significantly up-regulated, and more genes affiliated with chaperones and amino acid transport and metabolism were significantly down-regulated. It was notable that the expressions of eighteen genes affiliated with flagella and four genes affiliated with heat shock proteins were significantly up-regulated. Meanwhile, the expression of nine genes belonging to cytochrome and cytochrome oxidase, and five genes belonging to Ton B-dependent receptor,were significantly down-regulated. Among the eighteen genes with antioxidant activity categorized by GO analysis, the expression of one gene was significantly up-regulated; however, the expressions of two genes were significantly down-regulated. Briefly, RNA-Seq indicated that, except for the classical anti-oxidative genes and stress proteins, genes affiliated with flagella and function unknown played important roles in coping with oxidative stress in Pseudoalteromonas sp. A2. This overall survey of transcriptome and oxidative stress-relevant genes can contribute to understand the adaptive mechanism of Arctic bacteria.

关键词： Arctic Pseudoalteromonas oxidative stress RNA-Seq

Production and characterization of an extracellular polysaccharide of antarctic marine bacteria Pseudoalteromonas sp. S-15-13

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Acta Oceanologica Sinica 2006年第6期25卷 106-115页

作者： li Jiang CHEN Kaoshan liN Xuezheng HE Peiqing li Guangyou Key Laboratory of Marine Bio-active Substances First Institute of Oceanography State Oceanic Administration Qingdao 266061 China School of life Science Shandong University Jinan 250100 China

Twenty-seven antarctic bacteria producing extracellular polysaccharide （EPS） were selected from 57 strains by staining technology. The effects of major environmental factors on the growth and EPS production of Pseudoalteromonas sp. S - 15 - 13 were investigated, and the EPS was separated and purified for characterization analysis. The results showed that the optimal conditions for the EPS production were culture period, 56 h; growth temperature, 8 ℃ ; carbon source, 1.0% glucose; NaCI concentration, 3.0% ; pH 6.0 - 7.0. The EPS was purified by cold ethanol precipitation, proteins removal, ion exchange chromatography and gel chromatography technology. The molecular mass of EPS - H was 62.kDa as determined by the high performance gel permeation chromatography. Its sugar composition was a homopolymer of marmose analyzed by gas chromatograph spectroscopy. After repeated freezing and thawing of the bacteria hiomass in the presence of EPS, the bacterial growth was much higher than that observed after freezing in the absence of EPS and the difference augmented with the increase of freeze-thaw cycles. It is hypothesized that the adaptation of Pseudoalteromonas sp. S- 15 - 13 to the antarctic marine conditions, characterized by low temperature, high NaCl concentration and repeated freeze-thaw cycles, might be related to the EPS production ability.

关键词： antarctic bacteria Pseudoalteromonas sp. S - 15 - 13 ,extracellular polysaccharide environmental factors cryoprotection

Simulations of dissolved oxygen concentration in CMIP5 Earth system models

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Acta Oceanologica Sinica 2016年第12期35卷 28-37页

作者： BAO Ying li Yangchun The first institute of {2. State Oceanic Administration Laboratory for Regional oceanography and Numerical Modeling Qingdao National Laboratory for Marine Science and Technology state Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry Institute of Atmospheric PhysicsChinese Academy of Science

The climatologies of dissolved oxygen concentration in the ocean simulated by nine Earth system models(ESMs) from the historical emission driven experiment of CMIP5(Phase 5 of the Climate Model Intercomparison Project) are quantitatively evaluated by comparing the simulated oxygen to the WOA09 observation based on common statistical metrics. At the sea surface, distribution of dissolved oxygen is well simulated by all nine ESMs due to well-simulated sea surface temperature(SST), with both globally-averaged error and root mean square error(RMSE) close to zero, and both correlation coefficients and normalized standard deviation close to 1. However, the model performance differs from each other at the intermediate depth and deep ocean where important water masses exist. At the depth of 500 to 1 000 m where the oxygen minimum zones(OMZs) exist, all ESMs show a maximum of globally-averaged error and RMSE, and a minimum of the spatial correlation coefficient. In the ocean interior, the reason for model biases is complicated, and both the meridional overturning circulation(MOC) and the particulate organic carbon flux contribute to the biases of dissolved oxygen distribution. Analysis results show the physical bias contributes more. Simulation bias of important water masses such as North Atlantic Deep Water(NADW), Antarctic Bottom Water(AABW) and North Pacific Intermediate Water(NPIW) indicated by distributions of MOCs greatly affects the distributions of oxygen in north Atlantic, Southern Ocean and north Pacific, *** the model simulations of oxygen differ greatly from each other in the ocean interior, the multi-model mean shows a better agreement with the observation.

关键词： dissolved oxygen CMIP5 Earth system model meridional overturning circulation particulate organic carbon flux

Morphology of four Miliolinella species (Foraminifera, Protozoa) with description of a new species, Miliolinella obesa nov. spec., from the tropical West Pacific Ocean

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Acta Oceanologica Sinica 2018年第10期37卷 64-69页

作者： LEI Yanli li Tiegang Department of Marine Organism Taxonomy and Phylogeny Institute of Oceanology Chinese Academy of Sciences Qingdao 266071 China Key Laboratory of Marine Sedimentology and Environmental Geology the First Institute of Oceanography State Oceanic Administration Qingdao 266061 China Laboratory for Marine Geology Pilot National Laboratory for Marine Science and Technology (Qingdao) Qingdao 266061 China Center for Ocean Mega-Science Chinese Academy of Sciences Qingdao 266071 China University of Chinese Academy of Sciences Beijing 100049 China

Foraminiferal oozes were sampled from the tropical West Pacific seamount and seabed of deep sea, by a remotely operated vehicle （ROV） in December 2.14 and March 2.16. Using standard morphological method, four Miliolinella species, including Miliolinella obesa, M. circularis, M. suborbicularis and M. subrotunda were described. Among the four species, M. obesa is a new species. It is a large member （about 500 μm in length） of the genus. This species is characterized by having a very stout and transverse broadly circular outline, and its body width is greater than the body length. In addition, its chamber demarcations are obscure from the exterior appearance. Three chambers are unclearly visible on one side and two chambers are visible on the opposite. Finally, we provided very detailed taxonomic microphotographs and the ecological distribution information for each species.

关键词： deep sea foraminifera Miliolinella seamount seabed West Pacific Ocean

Biomarker evidence for changes in terrestrial organic matter input into the Yellow Sea mud area during the Holocene

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Science China Earth Sciences 2016年第6期59卷 1216-1224页

作者： WU Peng XIAO XiaoTong TAO ShuQin YANG ZuoSheng ZHANG HaiLong li li ZHAO MeiXuna Key Laboratory of Marine Chemistry Theory and Technology Ministry of EducationOcean University of ChinaQingdao 266100China Key Laboratory of Marine Hydrocarbon Resources and Environmental Geology Ministry of Land and ResourcesQingdao 266071China Third institute of oceanography State Oceanic Administration(SOA)Xiamen 361005China College of Marine Geoscience Ocean University of ChinaQingdao 266100China

We present lipid biomarker records of two cores （ZYI and ZY3） from the central South Yellow Sea mud area to investigate the changes in sources and transport processes of the sedimentary organic matter （OM） throughout the Holocene. Based on the analysis of marine biomarker content （EPB （Phytoplankton Biomarker, total content of brassicasterol, dinosterol and C37-alkenones） and crenarchaeol）, and terrestrial biomarkers （En-alkanols and brGDGTs） as well as TMBR＇ and BIT index values, the marine organic matter （MOM） and terrestrial organic matter （TOM） deposition history was reconstructed. Changes in TOM and MOM were related to variations in land vegetation density and marine productivity, as well as transport processes dominated by the oceanic circulation system. The marine biomarker contents from the South Yellow Sea have generally in- creased throughout the Holocene, indicating that the increased MOM contents were mainly controlled by the strengthening of the circulation system. The terrestrial biomarkers, on the other hand, were more variable, indicating more complex influence of TOM burial in the Yellow Sea. During the Early Holocene （72.0-6000 cal yr BP）, the moderate TOM input revealed by the terrestrial proxy records may result from abundant land source supply by strong river transport despite the lack of transport via circulation system. The Mid-Holocene （6000-3000 cal yr BP） was characterized by decreased terrestrial biomarker contents. The balance between the decrease in land source supply and increase of transportation by the current system of the TOM resulted in the lower but stable contents of TOM. During the Late Holocene （3000 cal yr BP to present）, the TOM deposition in the South Yellow Sea increased as the current system was further enhanced and thus transported more TOM to the central South Yellow Sea, although the land supply of TOM was further reduced.

关键词： South Yellow Sea Holocene Biomarker Marine organic matter Terrestrial organic matter

ESTABliSHMENT OF THE OCEAN DYNAMIC SYSTEM WITH FOUR SUB-SYSTEMS AND THE DERIVATION OF THEIR GOVERNING EQUATION SETS

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Journal of Hydrodynamics 2012年第2期24卷 153-168页

作者： YUAN Ye-li QIA0 Fang-li YIN Xun-qiang HAN Lei LU Ming The first institute of {2. State Oceanic Administration of ChinaQingdao 266061China

Based on their differences in physical characteristics and time-space scales,the ocean motions have been divided into four types in the present paper：turbulence,wave-like motion,eddy-like motion and *** the three-fold Reynolds averages to the governing equations with Boussinesq approximation,with the averages defined on the former three sub-systems,we derive the governing equation sets of the four sub-systems and refer to their sum as ＂the ocean dynamic system＂.In these equation sets,the interactions among different motions appear in two forms：the {2. one includes advection transport and shear instability generation of larger scale motions,and the second one is the mixing induced by smaller scale motions in the form of transport flux *** governing equation sets are the basis of analytical/numerical descriptions of various ocean processes.

关键词： ocean dynamic system four sub-systems advection transport shear instability transport flux residue