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Journal of Oceanology and Limnology 2022年第3期40卷 1097-1109页

作者： Mengyu LI Yuqiang LI Tengfei XING Yulong LI Jinxian LIU CAS Key Laboratory of marine Ecology and environmental sciences Institute of OceanologyChinese Academy of SciencesQingdao 266071China Laboratory for marine Ecology and environmental Science Pilot National Laboratory for Marine Science and Technology(Qingdao)Qingdao 266237China center for Ocean Mega-Science Chinese Academy of SciencesQingdao 266071China University of Chinese Academy of sciences Beijing 100049China

Periwinkle Littoraria sinensis is a widely distributed gastropod in rocky intertidal zone of the northwestern Pacifi *** examine genetic diversity and genetic connectivity among coastal populations of *** in China,1636 pairs of primers were successfully designed using whole-genome shotgun sequencing,de novo assembly,and a bioinformatics pipeline *** highly variable polymorphic markers were selected to genotype 351 individuals from 15 *** of nine microsatellite loci were retained for population genetic analysis,and weak genetic differentiation among populations were detected,suggesting high gene flow among *** long planktonic larval duration of *** might have played an important role in the high gene flow among populations.A tendency of genetic differentiation between north and south populations of *** was detected,which might be resulted from isolation due to lowered sea level in the last glacial ***,the newly founded populations along the coast of Jiangsu Province were closely related to populations to the south of the Changjiang(Yangtze)River estuary,suggesting that the main source of the newly founded populations is from natural rocky populations south of the estuary.

关键词： population genetics Littoraria sinensis gastropod simple-sequence repeats

Tracing the settlement region of massive floating green algae in the Yellow Sea

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Journal of Oceanology and Limnology 2019年第5期37卷 1555-1565页

作者： GENG Huixia YU Rencheng ZHANG Qingchun YAN Tian KONG Fanzhou ZHOU Mingjiang Key Laboratory of marine Ecology and environmental sciences Institute of OceanologyChinese Academy of SciencesQingdao 266071China Laboratory for marine Ecology and environmental Science Pilot National Laboratory for Marine Science and Technology (Qingdao)Qingdao 266237China University of Chinese Academy of sciences Beijing 100049China center for Ocean Mega-Science Chinese Academy of SciencesQingdao 266071China

Outbreaks of large-scale green tides formed by Ulva prolifera in the Yellow Sea (YS) cause heavy ecological damages and huge economic losses. However, the ecological consequences of green tides remain poorly understood due to the lack of knowledge on the settlement region of massive green algae floating in the YS. In this study, we established a method to trace the settlement region of floating green algae, using 28-isofucosterol preserved in sediment as the specific biomarker for green algae. Sterols including 28-isofucosterol in surface sediment samples collected during an investigation in the YS and the Bohai Sea (BS) in August 2015 were analyzed using gas chromatography coupled with a mass spectrometer (GC-MS). Based on the content of 28-isofucosterol in sediment samples, the potential settlement region of fl oating green algae was identifi ed in the sea area southeast to the Shandong Peninsula around the sampling site H06 (122.66°E, 36.00°N). This paper presents a first result on the settlement region of floating green algae in the YS for providing a solid basis to elucidate the ecological consequences of green tides in the area.

关键词： green tide biomarker sterol Ulva prolifera

Screening for lipophilic marine toxins and their potential producers in coastal waters of Weihai in autumn,2020

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Journal of Oceanology and Limnology 2022年第6期40卷 2218-2230页

作者： Huixia GENG Hongxiao SUN Chao LIU Fanzhou KONG Qingchun ZHANG Tian YAN Rencheng YU CAS Key Laboratory of marine Ecology and environmental sciences Institute of OceanologyChinese Academy of SciencesQingdao 266071China Laboratory for marine Ecology and environmental Science Pilot National Laboratory for Marine Science and Technology(Qingdao)Qingdao 266237China University of Chinese Academy of sciences Beijing 100049China center for Ocean Mega-Science Chinese Academy of SciencesQingdao 266071China

Lipophilic marine toxins(LMTs)produced by some microalgae in the sea could accumulate in shellfish and pose potential threats to the health of seafood *** and shellfish samples were collected from coastal waters of Weihai in Shandong Peninsula,China in autumn,2020,and screened for lipophilic marine toxins and their potential producers using liquid chromatography-tandem mass spectrometry(LC-MS/MS)analysis and high throughput sequencing of partial DNA(V4 region of the 18S rRNA gene)extracted from ***-2(PTX2),trace amounts of azaspiracid(AZA1 or AZA40),and 13-desmethyl spirolide C(13-DesMe-C)were detected in phytoplankton samples,while PTX2 and gymnodimine(GYM)were detected in shellfish *** toxin content in shellfish samples was much lower than the regulatory limit or values reported *** suggest that lipophilic marine toxins should have low risk in coastal waters of Weihai in *** on the data of high throughput sequencing,the OTUs were assigned to 5 identified species of Alexandrium,including *** capable of producing 13-DesMe-C and *** OTUs were found closely related to the toxic species in genus Dinophysis,but it is impossible to assign them to any identified species due to the low resolving power of the V4 region for *** OTUs could not be assigned to any identified species in the genus Azadinium,suggesting the existence of unidentified species in this region.

关键词： harmful algal blooms phytoplankton shellfish lipophilic marine toxins(LMTs) Yellow Sea liquid chromatography-tandem mass spectrometry

Analysis of differences in nutrients chemistry in seamount seawaters in the Kocebu and M4 seamounts in Western Pacific Ocean

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Journal of Oceanology and Limnology 2021年第5期39卷 1662-1674页

作者： Jun MA Jinming SONG Xuegang LI Qidong WANG Huamao YUAN Ning LI Liqin DUAN CAS Key Laboratory of marine Ecology and environmental sciences Institute of OceanologyChinese Academy of SciencesQingdao 266071China Laboratory for marine Ecology and environmental Science Qingdao NationalLaboratory for Marine Science and TechnologyQingdao 266237China University of Chinese Academy of sciences Beijing 100049China center for Ocean Mega-Science Chinese Academy of SciencesQingdao266071China

Comprehensive surveys were conducted in the Kocebu deep seamount and the M4 shallow seamount in the Western Pacific Ocean in March 2018 and May 2019,*** distributions of nutrients in euphotic zone of the two seamount-areas were revealed,and the causative controlling factors were *** show that the vertical distribution of nutrients in the two seamount-areas accorded with the general law of the oligotrophic *** concentrations of NO_(3)-N,PO_(4)-P,and SiO_(3)-Si generally increased gradually with the increase of water depth,and they were extremely low in water layers within100 *** area of high NO_(2)-N concentration well agreed with the Deep Chlorophyll Maximum *** the other hand,the distribution of water masses and phytoplankton and hydrological conditions in the two seamount-areas were different,resulting in lower concentrations of NO_(3)-N,PO_(4)-P,and SiO_(3)-Si in the water layers below 100 m in the Kocebu seamount area than those in the M4 seamount *** addition,NO_(2)-N was affected by the distribution of phytoplankton,and distributed mainly in the water layers of 150 and100 *** was upwelling in the euphotic zone of M4 seamount area,causing accumulations of nutrients and phytoplankton around the seamount,forming a"seamount effect";however,no such an effect was found in Kocebu seamount *** by the composition of biological community and the"seamount effect",the nitrogen limitation in the M4 seamount area was not significant,and the dissolved inorganic nitrogen(DIN):PO_(4)-P and SiO_(3)-Si:DIN were closer to the Redfield ratios.

关键词： nutrients comparison seamount Western Pacific Ocean

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

Grey relational analysis on the relation between marine environmental factors and oxidation-reduction potential

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Chinese Journal of Oceanology and Limnology 2009年第3期27卷 583-586页

作者：刘学庆王佳张盾李言涛 marine environmental Engineering center Institute of OceanologyChinese Academy of Sciences College of Chemistry and Chemical Engineering Ocean University of China

The effects of marine environmental factors-temperature （T）, dissolved oxygen （DO）, salinity （S） and pH--on the oxidation-reduction potential （ORP） of natural seawater were studied in laboratory. The results show an indistinct relationship between these four factors and the ORE but they did impact the ORP. Common mathematical methods were not applicable for describing the relationship. Therefore, a grey relational analysis （GRA） method was developed. The degrees of correlation were calculated according to GILA and the values of T, pH, DO and S were 0.744, 0.710, 0.692 and 0.690, respectively. From these values, the relations of these factors to the ORP could be described and evaluated, and those of T and pH were relatively major. In general, ORP is influenced by the synergic effect of T, DO, pH and S, with no single factor having an outstanding role.

关键词： temperature dissolved oxygen salinity pH oxidation-reduction potential (ORP) grey relational analysis (GRA)

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

Spatial variations of bacterial community composition in sediments of the Jiaozhou Bay,China

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Journal of Oceanology and Limnology 2021年第3期39卷 865-879页

作者： Qiqi SUN Jinming SONG Xuegang LI Huamao YUAN Jianwei XING Key Laboratory of marine Ecology and environmental sciences Institute of OceanologyChinese Academy of SciencesQingdao 266071China Laboratory for marine Ecology and environmental Science Pilot National Laboratory for Marine Science and Technology(Qingdao)Qingdao 266071China center for Ocean Mega-Science Chinese Academy of SciencesQingdao 266071China University of Chinese Academy of sciences Beijing 100049China

Spatial variations of sediment microbes pose a great challenge for the estimation of anthropogenic influence on biogeochemical processes,yet remain very unclear in coastal *** sediments in 9 stations from the eutrophic Jiaozhou Bay,China,were sampled,DNA was extracted within the sediments,and the 16 S rDNA was sequenced with the Illumina Hiseq *** reveal considerable heterogeneity of sediment bacteria in the Jiaozhou Bay,of which Proteobacteria and Bacteroidetes accounted for over 75%.Bacterial alpha-diversity indices decreased generally from the outside to the inner part of the bay and from the offshore to the nearshore *** community structures of S3,S4,S7,and S8 clustered,those of S5,S13,and S14 grouped together,while those of S6 and S10 were distinct from each other and from those of the other *** class Gammaproteobacteria were more abundant at the stations with mesoeutrophic to eutrophic levels(S4,S5,S8,and S10)and less abundant at oligotrophic stations(S6,S13,and S14),while Deltaproteobacteria had an opposite distribution ***,bacterial community composition transitioned from being Xanthomonadales-dominant at S4 and S8 to being unidentifedGammaproteobacteria-dominant at S5,S6,S13,and S14,while in other stations there were comparable *** biogeochemical processes correspondingly changed from being nitrogen cycling-dominant at S4 and S8 to being sulfur cycling-dominant at S5,S6,S13,and *** bacterial distribution patterns were especially affected by the factors(dissolved organic phosphorus,DOP)in the overlying seawater due to the habitat status of P-insu fficiency in the *** orders Xanthomonadales and Alteromonadales could serve as bioindicators of anthropogenic pollution to different pollution *** last,divergent distribution patterns of individual bacterial populations in the bay were revealed,the influential environmental gradients were clarified,and the uncertainty of microbes wa

关键词： Jiaozhou Bay bacterial community spatial variation sediments overlying water

Control factors of DIC in the Y3 seamount waters of the Western Pacific Ocean

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Journal of Oceanology and Limnology 2020年第4期38卷 1215-1224页

作者： MA Jun SONG Jinming LI Xuegang YUAN Huamao LI Ning DUAN Liqin WANG Qidong CAS Key Laboratory of marine Ecology and environmental sciences Institute of OceanologyChinese Academy of SciencesQingdao 266071China marine Ecology and environmental Science Laboratory 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

An investigation was carried out in the Y3 seamount area of the Western Pacific Ocean in December 2014,and the distribution of dissolved inorganic carbon(DIC)and its relationship with environmental factors in this area were *** results show that DIC concentration was higher in the adjacent waters of the Y3 seamount area,and the uplift of DIC isolines at the stations was close to the ***,interaction between the North Equatorial Current(NEC)and the Y3 seamount affected the DIC distribution,i.e.,the upwelling in the same direction of the NEC was obvious,resulting in a decreasing trend of average concentration of DIC in the 200 m water column from the top to the two sides in this direction but in the cross *** DIC concentration increased with the water depth increase,and its distribution was affected by various environmental *** the surface water,high temperature was a decisive factor for the decrease of the DIC concentration,but the photosynthesis of phytoplankton showing only a weak *** the North Pacific Tropic Water(NPTW),DIC production rate from organic matter decomposition was higher than that of DIC consumption by phytoplankton photosynthesis,leading to a continual increase of *** the North Pacific Intermediate Water(NPIW),organic matter decomposition played a leading role in the increase of *** the deep water,decomposition of organic matter weakened,and the dissolution of CaCO3 controlled the carbonate system,and DIC had the smallest variation range.

关键词： dissolved inorganic carbon(DIC) Western Pacific Ocean Y3 seamount water masses environmental factors

Tintinnid diversity in the tropical West Pacific Ocean

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Acta Oceanologica Sinica 2018年第10期37卷 218-228页

作者： LI Haibo ZHANG Wuchang ZHAO Yuan ZHAO Li DONG Yi WANG Chaofeng LIANG Chen XIAO Tian CAS Key Laboratory of marine Ecology and environmental sciences Institute of Oceanology Chinese Academy of Sciences Qingdao 266071 China Laboratory for marine Ecology and environmental Science Pilot National Laboratory for Marine Science and Technology (Qingdao) Qingdao 266237 China University of Chinese Academy of sciences Beijing 100049 China center for Ocean Mega-Science Chinese Academy of Sciences Qingdao 266071 China

In order to investigate the tintinnid diversity, vertical distribution and latitudinal variation in the tropical West Pacific Ocean, water samples of different depths from surface to 200 m were collected along four transects. Totally 124 tintinnid species in 39 genera were detected. Most species preferred to live in the surface and subsurface waters. High tintinnid species richness, abundance and diversity index mainly occurred at depths slight shallower than the layer of deep chlorophyll maximum. Species richness, abundance and Shannon＇s diversity index were significant positive correlation with temperature and chlorophyll a in vivo fluorescence, but significant negative correlation with salinity and depth. The correlations between most dominant species and environmental factors were not significant. Tintinnid diversity was extremely high in this area, species richness ranged from 25 to 52 at each station, Shannon＇s diversity indexes were higher than 3 at most sampling positions from surface to 75 m. Proportions of redundant species were high, accounted for 87.90% of species pool and 60.38% of total abundance, indicating high capacity to response to changes in resource composition and predation pressures of tintinnid communities in the tropical West Pacific Ocean.

关键词： tintinnid diversity redundant species tropical West Pacific Ocean