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Emission characteristics of biogenic volatile organic compounds in a subtropical pristine forest of southern China

Journal of environmental Sciences 2025年第2期148卷 665-682页

作者： Xi Chen Daocheng Gong Youjing Lin Qiao Xu Yujin Wang Shiwei Liu Qinqin Li Fangyuan Ma Jiangyong Li Shuo Deng Hao Wang Boguang Wang Institute for environmental and Climate Research Jinan UniversityGuangzhou 511443China Guangdong Provincial Observation and Research station for Atmospheric Environment and Carbon Neutrality in Nanling Forests China Australia-China Centre for Air Quality Science and Management(Guangdong) Guangzhou 511443China Hainan Provincial Ecological and environmental monitoring Center Haikou 571126China

Emission characteristics of biogenic volatile organic compounds(BVOCs)from dominant tree species in the subtropical pristine forests of China are extremely *** we conducted in situ field measurements of BVOCs emissions from representative mature evergreen trees by using dynamic branch enclosures at four altitude gradients(600-1690ma.s.l.)in the Nanling Mountains of southern *** characteristics as well as seasonal and altitudinal variations were *** emission rates and canopyscale emission factors were then *** showed that BVOCs emission intensities in the wet season were generally higher than those in the dry *** were the dominant BVOCs emitted from most broad-leaved trees,accounting for over 70%of the *** superba,Yushania basihirsuta and Altingia chinensis had relatively high emission intensities and secondary pollutant formation *** localized emission factors of isoprene were comparable to the defaults in the Model of Emissions of Gases and Aerosols fromNature(MEGAN),while emission factors of monoterpenes and sesquiterpenes were 2 to 58 times of those in the *** results can be used to update the current BVOCs emission inventory in MEGAN,thereby reducing the uncertainties of BVOCs emission estimations in forested regions of southern China.

关键词： Biogenic volatile organic compounds(BVOCs) Dynamic enclosure system Nanling Mountains Emission factors Emission rates Chemical reactivity

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Expression profiles of two small heat shock proteins and antioxidant enzyme activity in Mytilus galloprovincialis exposed to cadmium at environmentally relevant concentrations

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Chinese Journal of Oceanology and Limnology 2014年第2期32卷 334-343页

作者：由丽萍宁璇璇陈磊磊张林宝赵建民刘小莉吴惠丰 Key Laboratory of Coastal Zone environmental Processes and Ecological Remediation Yantai Institute of Coastal Zone ResearchChinese Academy of Sciences University of Chinese Academy of Sciences yantai oceanic environmental monitoring central station State Oceanic Administration

Small heat shock proteins encompass a widespread but diverse class of proteins, which play key roles in protecting organisms from various stressors. In the present study, the full-length cDNAs of two small heat shock proteins （MgsHSP22 and MgsHSP24.1） were cloned from Mytilus galloprovincialis, which encoded peptides of 181 and 247 amino acids, respectively. Both MgsHSP22 and MgsHSP24.1 were detected in all tissues examined by real-time PCR, with the highest expression being observed in muscle and gonad tissues. The real-time PCR results revealed that Cd significantly inhibited MgsHSP22 expression at 24 h and MgsHSP24.1 at 24 and 48 h under 5 ug/L Cd2＋ exposure. MgsHSP24.1 expression was also significantly inhibited after 50 ug/L Cd2＋ exposure for 48 h. With regard to antioxidant enzymes, increased GPx and CAT activity were detected under Cd2＋ stress （5 and 50 ug/L）, while no significant difference in SOD activity was observed throughout the experiment. Overall, both MgsHsps and antioxidant enzymes revealed their potential as Cd stress biomarkers in M. galloprovincialis.

关键词： Mytilus galloprovincialis small heat shock protein superoxide dismutase (SOD) catalase (CAT) glutathione peroxidase (GPx) cadmium

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Mineral distributions in surface sediments of the western South Yellow Sea:implications for sediment provenance and transportation

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Chinese Journal of Oceanology and Limnology 2015年第2期33卷 510-524页

作者：卢健李安春黄朋李艳 Key Laboratory of Marine Geology and Environment Institute of OceanologyChinese Academy of Sciences University of Chinese Academy of Sciences yantai Ocean environmental monitoring central station of State oceanic Administration

The South Yellow Sea(SYS) is strongly influenced by the substantial sediment loads of the Huanghe(Yellow)(including the modern Huanghe and abandoned old Huanghe subaqueous delta) and Changjiang(Yangtze) Rivers. However,the dispersal patterns of these sediments,especially in the western SYS,have not been clearly illustrated. In this study,we have analyzed clay minerals,detrital minerals,and grain sizes for 245 surface sediment samples(0–5 cm) collected from the western SYS. The clay minerals,on average,consist of 67% illite,14% smectite,11% chlorite,and 8% kaolinite. Clay minerals,detrital minerals,and grain size analyses of surface sediments,combined with water mass hydrology analysis,reveal that sediments in the western SYS are mainly derived from the modern Huanghe River,the abandoned subaqueous delta of the old Huanghe River,some material from the Changjiang,and coastal erosion. The clay minerals(especially illite and smectite) and quartz/feldspar ratio distribution patterns,reveal that the influence of modern Huanghe sediments can reach 35°N in the northwestern part of the study area,an influence that can be enhanced especially in winter owing to northerly winds. Conversely,sediments along the Jiangsu coast are mixed,in summer,with material from the Changjiang arriving via northward flow of Changjiang Diluted Water. The Subei Coastal Current carries the refreshed sediments northward into the western SYS. Sediment distribution and transport in the western SYS are mainly controlled by the oceanic circulation system that is primarily related to the monsoon.

关键词： South Yellow Sea clay mineral Subei Coastal Current provenance

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Molecular cloning, characterization and expression profiles of thioredoxin 1 and thioredoxin 2 genes in Mytilus galloprovincialis

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Chinese Journal of Oceanology and Limnology 2013年第3期31卷 493-503页

作者：王清宁璇璇裴东赵建民由丽萍王春艳吴惠丰 Key Laboratory of Coastal Zone environmental Processes Chinese Academy of Science Shandong Provincial Key Laboratory of Coastal Zone environmental Processes Yantai Institute of Coastal Zone ResearchChinese Academy of Sciences yantai oceanic environmental monitoring central station of SOA China Agriculture University(yantai)

Thioredoxin （Trx） proteins are involved in many biological processes especially the regulation of cellular redox homeostasis. In this study, two Trx cDNAs were cloned from the mussel Mytilus galloprovincialis using rapid amplification of cDNA ends-polymerase chain reaction （RACE-PCR）. The two cDNAs were named MgTrxl and MgTrx2, respectively. The open reading frames of MgTrxl and MgTrx2 were 318 and 507 base pairs （bp） and they encoded proteins of 105 and 168 amino acids with estimated molecular masses of 11.45 and 18.93 kDa, respectively. Sequence analysis revealed that both proteins possessed the conserved active site dithiol motif Cys-Gly-Pro-Cys. In addition, MgTrx2 also possessed a putative mitochondrial targeting signal suggesting that it is located in the mitochondria. Quantitative real-time polymerase chain reaction （qPCR） revealed that both MgTrxl and MgTrx2 were constitutively expressed in all tissues examined. The MgTrxl transcript was most abundant in hemocytes and gills, whereas the MgTrx2 transcript was most abundant in gonad, hepatopancreas, gill and hemocytes. Following Vibrio anguillarum challenge, the expression of MgTrxl was up-regulated and reached its peak, at a value 10-fold the initial value, at 24 h. Subsequently, expression returned back to the original level. In contrast, the expression level of MgTrx2 was down-regulated following bacterial stimulation, with one fifth of the control level evident at 12 h post challenge. These results suggest that MgTrxl and MgTrx2 may play important roles in the response ofM. galloprovincialis to bacterial challenge.

关键词： thioredoxin mussel bacterial challenge antioxidant

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Revisiting the seasonal wave height variability in the South China Sea with merged satellite altimetry observations

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Acta Oceanologica Sinica 2017年第11期36卷 38-50页

作者： SU Hui WEI Chunlei JIANG Shaocai LI Peiliang ZHAI Fangguo central Marine environmental monitoring station of Xiamen East China Sea BranchState Oceanic Administration Beihai Marine environmental monitoring Center South China Sea BranchState Oceanic Administration College of oceanic and Atmospheric Sciences Ocean University of China

The seasonal variability of the significant wave height（SWH） in the South China Sea（SCS） is investigated using the most up-to-date gridded daily altimeter data for the period of September 2009 to August 2015. The results indicate that the SWH shows a uniform seasonal variation in the whole SCS, with its maxima occurring in December/January and minima in May. Throughout the year, the SWH in the SCS is the largest around Luzon Strait（LS） and then gradually decreases southward across the basin. The surface wind speed has a similar seasonal variation, but with different spatial distributions in most months of the year. Further analysis indicates that the observed SWH variations are dominated by swell. The wind sea height, however, is much smaller. It is the the largest in two regions southwest of Taiwan Island and southeast of Vietnam Coast during the northeasterly monsoon, while the largest in the central/southern SCS during the southwesterly monsoon. The extreme wave condition also experiences a significant seasonal variation. In most regions of the northern and central SCS, the maxima of the 99 th percentile SWH that are larger than the SWH theoretically calculated with the wind speed for the fully developed seas mainly appear in August–November, closely related to strong tropical cyclone *** with previous studies, it is also implied that the wave climate in the Pacific Ocean plays an important role in the wave climate variations in the SCS.

关键词： significant wave height seasonal variability South China Sea satellite observations

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Transient expression of the enhanced green fluorescent protein(egfp) gene in Sargassum horneri

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Journal of Oceanology and Limnology 2019年第2期37卷 651-656页

作者： PANG Yunlong LI Yan LIU Zhengyi CUI Yulin QIN Song Key Laboratory of Coastal Biology and Biological Resource Utilization Yantai Institute of Coastal Zone Research Chinese Academy of Sciences Yantai 264003 China University of Chinese Academy of Sciences Beijing 101408 China yantai Ocean environmental monitoring central station of State oceanic Administration Yantai 264006 China

Sargassum horneri is a macroalga widespread in North Asia-Pacific region, and these years its bloom has caused huge damage to the environment and the economic in China. To make up the blank on genetic engineering research, a transient transformation system for the multicellular marine brown alga S . horneri was established in this research. The algae used in this research were collected from the Yellow Sea of China and verified as a same species S . horneri with analysis of molecular markers. The S . horneri parietal leaves were transformed with the enhanced green fluorescent gene as the reporter by micro-particle bombardment. The results show that green fluorescent protein (GFP) is an eff ective transgene reporter for S . horneri and that particle bombardment is a suitable method for transformation of S . horneri . Through selection of four diff erent promoters for EGFP and six groups’ bombardment characters, the highest transformation efficiency approximately 1.31% was got with the vector pEGFP-N1 at bombardment characters 900 spi and 6 cm distance. This research paves a way for the further research and application of S . horneri .

关键词： green fluorescent protein (GFP) particle bombardment Sargassum horneri transgenesis

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Geomorphic change in Dingzi Bay, East China since the 1950s： impacts of human activity and fluvial input

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Frontiers of Earth Science 2017年第2期11卷 385-396页

作者： Qing TIAN Qing WANG Yalong LIU oceanic Modeling and Observation Laboratory School of Marine Science Nanjing University of Information Science and Technology Nanjing 210044 China Coast Institute Ludong University Yantai 264025 China yantai Marine environmental monitoring Center station State Oceanic Administration Yantai 264000 China

This study examines the geomorphic evolution of Dingzi Bay, East China in response to human activity and variations in fluvial input since the 1950s. The analysis is based on data from multiple mathematical methods, along with information obtained from Remote Sensing, Geographic Information System and Global Position System technology. The results show that the annual runoff and sediment load discharged into Dingzi Bay display significant decreasing trends overall, and marked downward steps were observed in 1966 and 1980. Around 60%-80% of the decline is attributed to decreasing precipitation in the Wulong River Basin. The landform types in Dingzi Bay have changed significantly since the 1950s, especially over the period between 1981 and 1995. Large areas of tidal fiats, swamp, salt fields, and paddy fields have been reclaimed, and aquaculture ponds have been constructed. Consequently, the patterns of erosion and deposition in the bay have changed substantially. Despite a reduction in sediment input of 65.68% after 1966, low rates of sediment deposition continued in the bay. However, deposition rates changed significantly after 1981 owing to large-scale development in the bay, with a net depositional area approximately 10 times larger than that during 1961-1981. This geomorphic evolution stabilized following the termination of large-scale human activity in the bay after 1995. Overall, Dingzi Bay has shown a tendency towards silting-up during 1952-2010, with the bay head migrating seaward, the number of channels in the tidal creek system decreasing, and the tidal inlet becoming narrower and shorter. In conclusion, large- scale development and human activity in Dingzi Bay have controlled the geomorphic evolution of the bay since the 1950s.

关键词： sediment load runoff human activity,geomorphic evolution Dingzi Bay

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Evaluating the Accuracy of ERA5 Wave Reanalysis in the Water Around China

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Journal of Ocean University of China 2021年第1期20卷 1-9页

作者： SHI Hongyuan CAO Xuefeng LI Qingjie LI Delei SUN Jiacheng YOU Zaijin SUN Qingying School of Civil Engineering Ludong UniversityYantai 264025China Institute of Ports and Coastal Disaster Mitigation Ludong UniversityYantai 264025China National Marine environmental monitoring Center Dalian 116023China yantai Marine environmental monitoring central station State Oceanic AdministrationYantai 264006China Key Laboratory of Ocean Circulation and Waves Institute of OceanologyChinese Academy of SciencesQingdao 266071China

Wave parameters, such as wave height and wave period, are important for human activities, such as navigation, ocean engineering and sediment transport, etc. In this study, wave data from six buoys around Chinese waters, are used to assess the quality of wave height and wave period in the ERA5 reanalysis of the European Centre for Medium-Range Weather Forecasts. Annual hourly data with temporal resolution are used. The difference between the significant wave height(SWH) of ERA 5 and that of the buoy varies from-0.35 m to 0.30 m for the three shallow locations;for the three deep locations, the variation ranges from-0.09 m to 0.09 m. The ERA5 SWH data show positive biases, indicating an overall overestimation for all locations, except for E2 and S1 where underestimation is observed. During the tropical cyclone period, a large(about 32%) underestimation of the maximum SWH in the ERA5 data is observed. Hence, the ERA5 SWH data cannot be used for design applications without site-specific validation. The difference between the annual wave period from ERA5 and the mean wave period from the buoys varies from-1.31 s to 0.4 s. Inter-comparisons suggest that the ERA5 dataset is consistent with the annual mean SWH. However, for the average period, the performance is not good, and half of the correlation coefficients in the four points are less 50%. Overall, the deep water area simulation effect is better than that in the shallow water.

关键词： wave hindcasting reanalysis ERA5 wave height wave period

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Distributional characteristics of grain sizes of surface sediments in the Zhujiang River Estuary

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Acta Oceanologica Sinica 2014年第4期33卷 30-36页

作者： JIANG Siyi XU Fangjian LI Yan LIU Xiling ZHAO Yongfang XU Wei South China Sea Information Center State oceanic Administration School of Geosciences China University of Petroleum yantai Ocean environmental monitoring central station of State oceanic Administration Overseas Evaluation Center of CNOOC Research Institute Jiaozhou Bay Marine Ecosystem Research station Institute of Oceanology Chinese Academy of Sciences

Distributions of the parameters of sedimentary grain sizes and their correlations were studied to trace the sources of silts and their movement trends in the Zhujiang River Estuary based on the analyses of grain sizes from more than 1080 sedimentary samples. The distributions of the median diameter, public value, quartile deviation, and skewness of sediments were complex in the Zhuiiang River Estuary mainly because of the impact of the matter source regions, distances from the source regions, and hydrodynamic conditions, such as waves, tidal currents, and coastal currents. Analyses of the parameters of the grain sizes for the various types of sediments showed that the distributions of the surface sediments in the Zhujiang River Estuary were controlled by many factors. Their matter sources were mainly the sediments discharged from the runoffs and ebb tidal currents, and from the open sea. The sediments mainly moved by suspension movement. The silts formed a large area of sediments with suspended fine silts in the Zhujiang River Estuary by internal adjustment transportation in the area, and moved toward the western coast of the Zhujiang River Estuary under the effect of Coriolis forces and coastal currents.

关键词： grain size Zhujiang River sediment transport trend

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Seasonal variations in the phytoplankton community and the relationship between environmental factors of the sea around Xiaoheishan Island in China

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Chinese Journal of Oceanology and Limnology 2017年第1期35卷 163-173页

作者： ZHANG Zhipeng College of Marine Life Sciences Ocean University of China Qingdao 266003 China Marine Biology Institute of Shandong Province Qingdao 266104 China yantai Marine Environment monitoring central station of State oceanic Administration Yantai 264006 China

Seasonal variations in the phytoplankton community and the relationship between environmental factors of the sea area around Xiaoheishan Island are investigated in the present study. Xiaoheishan Island is located at 37°58′14″N and 120°38′46″E in Shandong Province, China. A total of 65 species of phytoplankton belonging to three phyla and 27 genera were identified, with Bacillariophyta having the largest number of species. The annual average chlorophyll a concentration for this area was 3.11 μg/L, and there occurs a Skeletonema costatum bloom in winter. The Shannon-Weaver indexes(log_2) of the phytoplankton from all stations were higher than 1, and the Pielou indexes were all higher than 0.3. The results of the canonical correspondence analysis(CCA) indicated that water temperature, PO_4^(3ˉ) and Cu were the environmental factors that had the greatest influence on the distribution of the phytoplankton community throughout the entire year. Although the concentration of heavy metal is well up to the state standards of the first grade of China(GB 3097-1997), these metals still have an impact on the phytoplankton community from this area.

关键词： phytoplankton environmental factor seasonal variations heavy metals Xiaoheishan Island

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