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Spatial patterns of zooplankton abundance,biovolume,and size structure in response to environmental variables:a case study in the Yellow Sea and East China Sea

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Journal of Oceanology and Limnology 2024年第1期42卷 113-127页

作者： Song SUN Haochen XIAN Xiaoxia SUN Mingliang ZHU mengtan liu Key Laboratory of Marine Ecology and Environmental Sciences Institute of OceanologyChinese Academy of SciencesQingdao 266071China Jiaozhou Bay National Marine Ecosystem Research Station Institute of OceanologyChinese Academy of SciencesQingdao 266071China University of Chinese Academy of Sciences Beijing 100049China Laboratory for Marine Ecology and Environmental Science Laoshan LaboratoryQingdao 266237China

The Yellow Sea(YS)and East China Sea(ECS)are highly dynamic marginal seas of the northwestern Pacific *** gain an in-depth understanding of zooplankton community structure,zooplankton abundance,biovolume,and size structure in summer 2017 in the YS and ECS were assessed using ZooScan imaging *** abundance and biovolume ranged 2.94–1187.14 inds./m^(3)and 3.13–3438.51 mm^(3)/m^(3),*** on the biovolume data of the categorized size classes of 26 identified taxonomic groups,the zooplankton community was classified into five groups,and each group was coupled with distinctive oceanographic *** the influence of the Yellow Sea Cold Water Mass,the Yellow Sea offshore group featured the lowest bottom temperature(10.84±3.42℃)and the most abundant Calanoids(mainly in the 2–3 mm size class).In the Yellow Sea inshore group,Hydrozoans showed the largest biovolume and dominated in the 3–4-mm and>5-mm size *** East China Sea offshore group,which was affected by the Kuroshio Branch Current,featured high temperature and salinity,and the lowest bottom dissolved oxygen(2.58±0.5 mg/L).The lowest values of zooplankton abundance and biovolume in the East China Sea offshore group might be attributed to the bottom dissolved oxygen *** East China Sea inshore group,which was mainly influenced by the Zhejiang-Fujian Coastal Current and Changjiang Diluted Water,was characterized by high chlorophyll a and the largest biovolume of carnivorous Siphonophores(280.82±303.37 mm^(3)/m^(3)).The Changjiang River estuary offshore group showed the most abundant Cyclopoids,which might be associated with the less turbid water mass in this *** temperature was considered the most important factor in shaping the size compositions of Calanoids in different groups.

关键词： zooplankton size structure ZooScan Yellow Sea East China Sea

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Factors aff ecting lipid and fatty acid composition of Calanus sinicus in the Yellow Sea and the East China Sea in spring

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Journal of Oceanology and Limnology 2022年第1期40卷 173-182页

作者： Yanqing WANG Zhencheng TAO Chaolun LI mengtan liu 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 Engineering and Technology Department Institute of OceanologyChinese Academy of SciencesQingdao 266071China Jiaozhou Bay National Marine Ecosystem Research Station Chinese Academy of SciencesQingdao 266071China Center of Deep Sea Research Institute of OceanologyChinese Academy of SciencesQingdao 266071China Center for Ocean Mega-Science Chinese Academy of SciencesQingdao 266071China University of Chinese Academy of Sciences Beijing 100049China

The factors aff ecting lipid and fatty acid composition of copepod Calanus sinicus in the Yellow Sea(YS)and the East China Sea(ECS)were examined in this *** spring,there were signifi cant diff erences between these two regions for both environmental conditions and food *** regional diff erence signifi cantly infl uenced the lipid and fatty acid profi les of *** results show that *** has a higher lipids content in ECS,especially for wax ester and triglyceride lipids,indicating a more active and effi cient *** to BIO-ENV analysis,the variation of lipids profi les may be infl uenced majorly by water ***,the fatty acids(FAs)profi les of *** were also diff erent between YS and ECS,especially in the four major contributors,C22꞉1ω11,eicosapentaenoic acid(EPA),docosahexenoic acid(DHA),and C20꞉1ω*** considerable amounts of self-biosynthesized FAs of herbivorous copepod(C22꞉1ω11 and C20꞉1ω9)and low DHA/EPA ratio may indicate that *** in ECS feed mainly on phytoplankton comparing to those in *** fatty acid profi les of *** were aff ected by the diff erences in food availability.

关键词： Calanus sinicus lipid storage wax ester fatty acid composition Yellow Sea and East China Sea

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Photobehaviors ofthe calanoid copepod Calanus sinicus from the Yellow Sea to visible and UV-B radiation as a function of wavelength and intensity

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Journal of Oceanology and Limnology 2019年第4期37卷 1289-1300页

作者： TAO Zhencheng WANG Yanqing WANG Junjian liu mengtan ZHANG Wuchang 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 Qingdao National Laboratory for Marine Science and Technology Qingdao 266071 China University of Chinese Academy of Sciences Beijing 100049 China Jiaozhou Bay Marine Ecosystem Research Station Chinese Academy of Sciences Qingdao 266071 China Center for Ocean Mega-Science Chinese Academy of Sciences Qingdao 266071 China Department of Engineering and Technology Institute of Oceanology Chinese Academy of Sciences Qingdao 266071 China

The effects of wavelength-specific visible light, white light, and ultraviolet-B (UV-B, 280- 315 nm) on selected behaviors, grazing rate, spawning rate, and hatching rate of the marine copepod Calanus sinicus collected from the Yellow Sea were studied. Calanus sinicus placed in a partitioned experimental system responded positively phototaxis to blue-cyan and yellow light but negatively to orange light and UVB. No obvious dodge activity was found among C. sinicus irradiated with 0.10 mW/cm^2 UV-B, whereas yellow-red light stimulated grazing. Egg production rate was highest at a white-light intensity of 1.58 mW/cm^2, with an average rate of 10.04 eggs/(female·d). These results are consistent with the observed phenomenon that C. sinicus in the Yellow Sea mostly spawn near dawn. Our results indicate that light intensity and spectrum are important factors affecting the diel vertical migration of C. sinicus under natural conditions in the Yellow Sea.

关键词： Calanus sinicus light phototaxis grazing reproduction ultraviolet

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Effects of nutrient limitations on three species of zooplankton

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Acta Oceanologica Sinica 2018年第4期37卷 58-68页

作者： CHEN Lei LI Chaolun ZHOU Konglin SHI Yongqiang liu mengtan Key Laboratory of Marine Ecology and Environmental Sciences Institute of Oceanology Chinese Academy of Sciences Qingdao 266071 China University of Chinese Academy of Sciences Beijing 100049 China Laboratory for Marine Ecology and Environmental Science Qingdao National Laboratory for Marine Science and Technology Qingdao 266071 China Center of Deep Sea Research Institute of Oceanology Chinese Academy of Sciences Qingdao 266071 China Key Laboratory of Marine Ecosystem and Biogeochemistry Second Institute of Oceanography State Oceanic Administration Hangzhou 310012 China Key Laboratory of Sustainable Development of Marine Fisheries of Ministry of Agriculture Yellow Sea Fisheries Research Institute Chinese Academy of Fishery Sciences Qingdao 266071 China Jiaozhou Bay Marine Ecosystem Research Station Chinese Ecosystem Research Network Qingdao 266071 China

Nutrient imbalance—a mismatch in nutrient ratios between the available food supply and the demands of consumers—has the potential to be transported up food chains,exposing zooplankton to nutrient *** this study,the response of Calanus sinicus（copepod）,Moina mongolica（cladocera）,and Brachionus plicatilis（rotifer） to nutrient-limited（no-limited,P-limited,and N-limited） food were evaluated from the perspective of growth,reproduction,and stoichiometric *** results indicated that the growth of three species was suppressed under nutrient-limited（especially P-limited） ***,the effect of nutrient limitations on their reproduction was *** ***,the dietary UFA（unsaturated fatty acid） as a major phospholipid component affected their egg production and total FA supporting energy promoted the hatchability of ***,excess carbon in the diet promoted egg production but reduced hatching *** ***,nutritional（P and UFA） and energy（total FA） support affected their *** fecundity exhibited the same pattern of growth（no-limited〉N-limited〉P-limited）.In terms of stoichiometric homeostasis,***＇ s elemental compositions were less likely to be affected by nutrient limitations than *** suggest that the effects of nutrient imbalances could potentially become an evolutionary force affecting ecosystem structure and stability in eutrophic waters.

关键词： zooplankton nutrient growth reproduction stoichiometric homoeostasis

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Feeding strategies of Euphausia superba in the eastern South Shetland Islands in austral summer

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Acta Oceanologica Sinica 2019年第10期38卷 75-83页

作者： mengtan liu Zhencheng Tao Ye Zhang Guang Yang Song Sun Chaolun Li Fengfeng Le Jiaozhou Bay National Marine Ecosystem Research Station 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 Key Laboratory of Marine Ecology and Environmental Sciences Institute of OceanologyChinese Academy of SciencesQingdao 266071China East Sea Marine Environmental Investigating and Surveying Center Ministry of Natural ResourcesShanghai 200137China Laboratory of Marine Ecosystem and Biogeochemistry Second Institute of OceanographyMinistry of Natural ResourcesHangzhou 310012China

Euphausia superba is a key species in the Southern Ocean that serves as a link between primary production and higher trophic *** investigate the feeding strategies of *** from the eastern South Shetland Islands,fatty acid biomarkers,stable isotope signatures,and an incubation experiment were *** results of the incubation experiment proved that adult *** mainly fed on 2–20μm particles,demonstrating the importance of nanoplankton in their ***,significant positive relationships betweenδ15N and body size demonstrated that size-related dietary shifts were present in *** from principal component analysis and the C16:1ω7/C18:4ω3 ratio showed that juveniles preferentially fed on dinoflagellates and adults were more likely to feed on *** acid profiles in adult *** roughly mirrored the different trophic conditions and feeding strategies between *** *** at Stas D2-07,D5-07,DA-01 and DA-02 exhibited elevated levels of C16:1ω7,C18:4ω3,C18:1ω9 and C18:1ω9/C18:1ω7,indicating higher levels of feeding on both phytoplankton and higher trophic *** contrast,adult *** at Stas D1-03 and D1-04 were characterized by high levels of polyunsaturated fatty acids/saturated fatty acids ratios and low levels of C16:1ω7,C18:1ω7,C18:4ω3,C18:1ω9 and total fatty *** inferred that adult krill at Stas D1-03 and D1-04 still suffered from difficult dietary conditions after *** different dietary conditions between stations suggest a highly plastic feeding strategy of *** in the eastern South Shetland Islands.

关键词： Euphausia superba South Shetland Islands fatty acids stable isotopes

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脂肪酸对中华哲水蚤摄食两种海洋微藻的指示作用

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生态学报 2011年第4期31卷 933-942页

作者：刘梦坛李超伦孙松中国科学院海洋研究所海洋生态与环境科学重点实验室青岛266071 中国科学院研究生院北京100049 山东胶州湾海洋生态系统国家野外科学观测研究站青岛266071

在室内以饥饿培养为对照,以海洋原甲藻(Prorocentrum micans)和中肋骨条藻(Skeletonema costatum)培养中华哲水蚤(Calanus sinicus),研究了各脂肪酸标记对中华哲水蚤摄食不同饵料的指示作用。结果显示,海洋原甲藻中18∶4ω3、22∶6ω3... 详细信息

在室内以饥饿培养为对照,以海洋原甲藻(Prorocentrum micans)和中肋骨条藻(Skeletonema costatum)培养中华哲水蚤(Calanus sinicus),研究了各脂肪酸标记对中华哲水蚤摄食不同饵料的指示作用。结果显示,海洋原甲藻中18∶4ω3、22∶6ω3含量较高,中肋骨条藻中16∶1ω7、20∶5ω3的含量较高。二者分别表现出典型的甲藻门和硅藻门的脂肪酸组成特征。中华哲水蚤的脂肪酸组成有两个特点:(1)20∶5ω3和22∶6ω3的含量均较高;(2)其体内表征桡足类浮游植物食性、由桡足类自身合成的20∶1和22∶1脂肪酸占有相当的比例。虽然中华哲水蚤对不同脂肪酸的吸收和转化效率不同,但以脂肪酸作为标记还是成功的指示了中华哲水蚤对微藻的摄食。在饥饿培养中,首先消耗的是那些浮游动物自身不能合成的多不饱和脂肪酸,而结构脂肪酸都表现出了较高的保守性。结合各脂肪酸标记变化趋势和Pearson相关性分析的结果认为,18∶4ω3、18∶4ω3/16∶1ω7、∑18/∑16能较好的指示中华哲水蚤对海洋原甲藻的摄食,仅16∶1ω7/18∶4ω3能指示中华哲水蚤对中肋骨条藻的摄食。

关键词：中华哲水蚤海洋原甲藻中肋骨条藻脂肪酸标记

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夏季黄东海中华哲水蚤种群分布、脂类含量和利用策略

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生态学报 2014年第16期34卷 4632-4639页

作者：王延清李超伦刘梦坛孙晓霞中国科学院海洋研究所海洋生态与环境科学重点实验室青岛266071 中国科学院大学北京100049 中国科学院海洋研究所山东胶州湾海洋生态系统国家野外科学观测研究站青岛266071

度夏过程对黄东海中华哲水蚤其种群延续具有重要的意义。通过2011年08月黄东海现场调查航次研究了中华哲水蚤夏季种群的分布和脂类含量,探讨了中华哲水蚤度夏期间的能量利用策略。结果表明,夏季在黄海中部以及浙江近岸存在中华哲水蚤的... 详细信息

度夏过程对黄东海中华哲水蚤其种群延续具有重要的意义。通过2011年08月黄东海现场调查航次研究了中华哲水蚤夏季种群的分布和脂类含量,探讨了中华哲水蚤度夏期间的能量利用策略。结果表明,夏季在黄海中部以及浙江近岸存在中华哲水蚤的密集分布区域。其中,黄海冷水团内的中华哲水蚤以C5期(平均为77.4%)个体为主,而冷水团周边及浙江近岸站位则主要由C5期(分别为32.3%和33.2%)和雌体(分别为41.3%和51.8%)组成。脂类含量结果显示,冷水团内的C5期中华哲水蚤的总脂含量最高(平均43.1μg/个),浙江近岸雌体的总脂含量(平均24.6μg/个)和黄海冷水团周边雌体的总脂含量(平均18.2μg/个)较低。在完全饥饿的假设下,冷水团内的C5期中华哲水蚤具有明显的代谢优势,其储存的脂类可以维持超过18天的代谢需求。而在浙江近岸以及冷水团周边,中华哲水蚤储存的脂类则只可维持3—6d的需求。由此推测,黄海冷水团内的C5期中华哲水蚤依靠储存的油脂和较低的摄食率度夏,而冷水团以外的种群则需要在适宜温度下积极摄食才能顺利度夏。

关键词：中华哲水蚤脂类度夏能量利用

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黄海春季和秋季中华哲水蚤脂类含量及组成分析

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海洋学报 2014年第2期36卷 99-107页

作者：王延清李超伦刘梦坛金鑫王晓东孙永坤中国科学院海洋研究所海洋生态与环境重点实验室山东青岛266071 中国科学院大学北京100049 中国科学院胶州湾海洋生态系统国家野外科学观测研究站山东青岛266071

脂类物质在哲水蚤的休眠、繁殖以及个体发育过程中发挥着重要作用,通过分析2010年11月(秋季)和2011年4月(春季)黄海中华哲水蚤Calanus sinicus的脂类组成,对脂类各组分的生理功能进行了初步探讨。结果表明,春季、秋季中华哲水蚤雌体脂... 详细信息

脂类物质在哲水蚤的休眠、繁殖以及个体发育过程中发挥着重要作用,通过分析2010年11月(秋季)和2011年4月(春季)黄海中华哲水蚤Calanus sinicus的脂类组成,对脂类各组分的生理功能进行了初步探讨。结果表明,春季、秋季中华哲水蚤雌体脂类平均含量占干质量的10.6%和12%,C5期个体脂类含量偏高,占到干质量的17%。中华哲水蚤所含脂类主要由蜡脂和磷脂组成,两种脂类约占总脂的90%,三酰甘油含量约占总脂的6%。结合种群结构对脂类的生理作用进行了初步探讨,发现:(1)蜡脂作为主要的能量储存方式,其含量变化反映出不同发育期、不同季节中华哲水蚤的能量需求变化;(2)磷脂作为结构性脂类在中华哲水蚤个体生长与生殖过程中具有重要作用;(3)三脂酰甘油在中华哲水蚤中的含量不高,但是可能在脂类转化利用过程中发挥作用。

关键词：中华哲水蚤黄海脂类蜡脂磷脂三脂酰甘油

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黑木耳UGP基因家族全基因组鉴定及其与菌丝生长多糖合成的相关性研究

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种子 2024年第4期43卷 69-80页

作者：苏世贤吴媛刘翀江苏燕刘青媛陈孟谈龙茶汪淘徐彦军田风华韦金江郎云龙牟海林徐乾城李伟贵州大学农学院贵阳550025 贵州大学食用菌研究院贵阳550025 贵州省高等学校设施蔬菜工程研究中心贵阳550025 贵州高原蓝梦菇业科技有限公司贵州毕节551700

黑木耳多糖是具有药用价值的生物活性分子,然而黑木耳高多糖的合成分子机理尚未明确。本研究对处于多糖合成途径关键位置的UGP家族基因进行了鉴定,从黑木耳基因组中鉴定出2个AhUGPs基因,并从另外21个食用菌基因组内挖掘出39个UGPs基因,... 详细信息

黑木耳多糖是具有药用价值的生物活性分子,然而黑木耳高多糖的合成分子机理尚未明确。本研究对处于多糖合成途径关键位置的UGP家族基因进行了鉴定,从黑木耳基因组中鉴定出2个AhUGPs基因,并从另外21个食用菌基因组内挖掘出39个UGPs基因,通过生物信息学分析发现,UGP基因家族成员在真菌体内具有较高的保守性,成员数量少但仍发挥着重要作用,木耳属的4个UGPs则表现出了更高的保守性。在对黑木耳AhUGPs的启动子区域分析中发现了较多的光响应元件和激素响应元件,说明AhUGPs较易受到光和激素调节。在对AhUGPs的表征中,发现AhUGP1的表达水平与菌丝生长速度、菌丝生物量、多糖含量都显著相关,相较于AhUGP2,AhUGP1在菌丝生长和多糖合成中的重要性更高。

关键词：黑木耳 UGP基因家族多糖合成菌丝生长

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A Hazard Assessment Method for Potential Earthquake-Induced Landslides – A Case Study in Huaxian County, Shaanxi Province

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Acta Geologica Sinica(English Edition) 2016年第2期90卷 590-603页

作者： liu Jiamei GAO mengtan WU Shuren WANG Tao WU Jian Institute of Geomechanics Chinese Academy of Geological SciencesBeijing 100081China Key Laboratory of Neotectonic Movement&Geohazards Ministry of Land and ResourcesBeijing 100081China Institute of geophysics China Earthquake AdministrationBeijing 100081China

The hazard assessment of potential earthquake-induced landslides is an important aspect of the study of earthquake-induced landslides. In this study, we assessed the hazard of potential earthquake-induced landslides in Huaxian County with a new hazard assessment method. This method is based on probabilistic seismic hazard analysis and the Newmark cumulative displacement assessment model. The model considers a comprehensive suite of information, including the seismic activities and engineering geological conditions in the study area, and simulates the uncertainty of the intensity parameters of the engineering geological rock groups using the Monte Carlo method. Unlike previous assessment studies on ground motions with a given exceedance probability level, the hazard of earthquake-induced landslides obtained by the method presented in this study allows for the possibility of earthquake-induced landslides in different parts of the study area in the future. The assessment of the hazard of earthquake-induced landslides in this study showed good agreement with the historical distribution of earthquake-induced landslides. This indicates that the assessment properly reflects the macroscopic rules for the development of earthquake-induced landslides in the study area, and can provide a reference framework for the management of the risk of earthquakeinduced landslides and land planning.

关键词： earthquake-induced landslide hazard assessment Newmark displacement model Monte Carlo

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