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The distribution of chlorophyll a and its influencing factors in different regions of the Bering Sea

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Acta Oceanologica Sinica 2014年第6期33卷 112-119页

作者： KANG Jianhua chen xingqun ZHANG Ming Third Institute of Oceanography State Oceanic Administration

The distribution of chlorophyll a （Chl a） and its relationships with physical and chemical parameters in different regions of the Bering Sea were discussed in July 2010. The results showed the seawater column Chl a concentrations were 13.41-553.89 mg/m2 and the average value was 118.15 mg/m2 in the study areas. The horizontal distribution of Chl a varied remarkably from basin to shelf in the Bering Sea. The regional order of Chl a concentrations from low to high was basin, slope, outer shelf, inner shelf, and middle shelf. The verti- cal distribution of Chl a was grouped mainly from single-peak type in basin, slope, outer shelf, and middle shelf, where the deep Chl a maxima （DCM） layer was observed at 25-50 m, 30-35 m, 36-44 m, and 37-47 m, respectively. The vertical distribution of Chl a mainly had three basic patterns： standard single-peak type, surface maximum type, and bottom maximum type in the inner shelf. The analysis also showed that the transportation of ocean currents may control the distribution of Chl a, and the effects were not simple in the basin of the Bering Sea. There was a positive correlation between Chl a and temperature, but no significant correlation between Chl a and nutrients. The Bering Sea slope was an area deeply influenced by slope current. Silicate was the factor that controlled the distribution of Chl a within parts of the water in the slope. Light intensity was an important environmental factor in controlling seawater column Chl a in the shelf, where Chl a was limited by nitrate rather than phosphate within the upper water. Meanwhile, there was a positive relationship between Chl a and salinity. Algal blooms broke out at Sta. B6 of the southwestern St. Lawrence Island and Stas F6 and F11 in the middle of the Bering Strait.

关键词： chlorophyll a distribution characteristics environmental influence factor algal bloom Bering Sea

Study of monthly variations in primary production and their relationships with environmental factors in the Daya Bay based on a general additive model

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Acta Oceanologica Sinica 2018年第12期37卷 107-117页

作者： KANG Jianhua HUANG Hao LI Weiwen LIN Yili chen xingqun Laboratory of Marine Biology and Ecology Third Institute of Oceanography Ministry of Natural Resources

In this study, the horizontal and vertical distribution of primary production(PP) and its monthly variations were described based on field data collected from the Daya Bay in January–December of 2016. The relationships between PP and environmental factors were analyzed using a general additive model(GAM). Significant seasonal differences were observed in the horizontal distribution of PP, while vertical distribution showed a relatively consistent unimodal pattern. The monthly average PP(calculated by carbon) ranged from 48.03 to 390.56 mg/(m~2·h),with an annual average of 182.77 mg/(m~2·h). The highest PP was observed in May and the lowest in ***, the overall trend in PP was spring>summer>winter>autumn, and spring PP was approximately three times that of autumn PP. GAM analysis revealed that temperature, bottom salinity, phytoplankton, and photosynthetically active radiation(PAR) had no significant relationships with PP, while longitude, depth, surface salinity, chlorophyll a(Chl a) and transparency were significantly correlated with PP. Overall, the results presented herein indicate that monsoonal changes and terrestrial and offshore water systems have crucial effects on environmental factors that are associated with PP changes.

关键词： primary production environmental factors general additive model monthly variations Daya Bay

Distribution of chlorophyll a, photosynthesis and their relations to the environmental factors in the Central South China Sea

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Acta Oceanologica Sinica 1990年第4期9卷 611-617页

作者： chen xingqun, chen Qihuan, Zhuang LiangzhongThird Institute of Oceanography, State Oceanic Administration, Xiamen, China China

Some studies have been made on the variation of primary productivity in the Central South ChinaSea. This paper studies comprehensively the characteristics of chlorophyll a distributions in time andspace and the primary productivity, as well their relations to the environmental *** and methods During the comprehensive investigation in the Central South China Sea from September 1983 toDecember 1984, the distributions of chlorophyll a and primary productivity were studied. Figure 1shows the sampling stations and their range of investigation.

关键词： Distribution of chlorophyll a photosynthesis and their relations to the environmental factors in the Central South China Sea

Primary productivity in the western tropical Pacific and equatorial warm waters

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Acta Oceanologica Sinica 2001年第1期20卷 117-129页

作者： chen xingqun 1,Zhang Ming 1,chen Qihuan 1 ThirdInstituteofOceanography ,StateOceanicAdministration ,Xiamen 36 10 0 5 ,China Third Institute of Oceanography State Oceanic Administration Xiamen 361005 China

Primary productivity in the western tropical Pacific and equatorial warm waters was studied in the WOCE cruise in November of 1991 and the TOGA-COARE cruise from November of 1992 to February of *** is shown that the total amount of integrated chlorophyll a(chloro a)was 19 79 mg/m 2 in depthof0～150 m and the average daily primary productivity was 171 mg/(m 2·d)(C)appeared in the western tropical Pacific while a higher chloro a(21 68 mg/m 2)and primary productivity [228 mg/(m 2·d)(C)]were observed in the equatorial warm *** highest chloro a was found at the coastal stations of Philippines and Irian while the lowest chloro a was at the offshore areas bounded by 2°～4°*** distribution pattern of chloro a biomass was related to different physical ***,which may have led to a high biomass, was a critical factor changing the distributions of temperature,salinity and nutrient in these areas.

关键词： The western tropical Pacific,equatorial warm waters,chlorophyll a primary productivity,distribution

Distribution of Chlorophyll a and primary productivity in the neritic waters of Fujian Province

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Acta Oceanologica Sinica 1997年第1期16卷 133-139页

作者： chen Qihuan, chen xingqun and Zhang Ming Third Institute of Oceanography, State Oceanic Administration, Xiamen 361005, China

INTRODUCTIONThe coast zone is the area where most human activities take place and where the highest economic benefit is produced. The knowledge of the distribution and variation of primary production provides the base... 详细信息

关键词： Distribution of Chlorophyll a and primary productivity in the neritic waters of Fujian Province

Ecological characteristics of phytoplankton community from eutrophic waters in the Maluan Bay

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Acta Oceanologica Sinica 1999年第4期18卷 563-580页

作者： Yang Qingliang chen Qihuan Lin Jinmei Lin Gengrning and chen xingqun( Third institute of Oceanography, State Oceanic Administration, Xiamen 361005, China) Third Institute of Oceanography State Oceanic Administration Xiamen 361005 China

present study is based on the analysis of the data collected in 10 dnas during the periods of 2 surveys (from May 1992 to January 1993 and from August 1993 to May 1994). The results show that the number ofphytoplankton in highly eutrophic waters of the Maluan Bay is low, Only 6-35 spotes from each cruise and 66species in total fain the 2 surveys. The phytoplanha abundanCe is high. The mean cell densities of phytoplanktonfrom the net samples were 21 386x 104 cells/m3 for the first sUrVey and 110 136 x 104 cells/m3 for the second survey,that fm the water Samples was 1 150. 7 cells/cm3. The mean concentration of chlorOPhyll a reachs 6. 67 mg/*** the species diversity (H') and evennes (J) were low, only 0. 78 and 0. 28, restwhvdy. The temporal and spatial fluctuation of the cell denSity of phytoplankton was quite wificant, caused banly by contribution of pennate diatom Nitzschia delicatissima that often abudanily occurred in a ofed waters rich in organic matter and could be takenas an ecologic indicator of highly eutrophic harbour. The axistence of good correlation between the cell density ofNitzschia delicatissima and some environmental variables (e. g. Po43 - P and COD, etc. ), and the heterotrophic tendancy of this species are discussed, too.

关键词： Eutrophication phytoplankton community marine ecology Xiamen

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概称句词项逻辑系统GAG与Gaa的完全性

逻辑学研究 2017年第2期10卷 2-21页

作者：陈星群周北海深圳大学人文学院哲学系北京大学哲学系

GAG与Gaa是关于概称句推理的逻辑系统。概称句词项逻辑的要点是引入了表示概念的词项,从而以更自然的方式表示概念在推理中的作用,这也带来了概称句词项逻辑语言的特点。涵义语义是用于概称句词项逻辑语言的形式语义。在涵义语义下GAG与... 详细信息

GAG与Gaa是关于概称句推理的逻辑系统。概称句词项逻辑的要点是引入了表示概念的词项,从而以更自然的方式表示概念在推理中的作用,这也带来了概称句词项逻辑语言的特点。涵义语义是用于概称句词项逻辑语言的形式语义。在涵义语义下GAG与Gaa是可靠的,但是完全性证明一直空缺。通过完全性证明,发现有必要对原来的涵义语义做一些补充和完善,为此提出涵义语义结构的一般形式,进而给出全涵义结构和实涵义结构。原来的语义结构实际上是全涵义结构。完全性证明需要使用实涵义结构。实涵义结构的框架部分与解释函数有关,因而不完全独立于被解释的语言。实涵义结构更像是认知主义语义观下的语义构造。长期以来,实在论语义观在逻辑学研究中根深蒂固。实涵义结构的提出,对这类逻辑研究的哲学基础提出了反思。

关键词：概称句词项逻辑完全性

九龙江河口浮游植物的时空变动及主要影响因素

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生态学报 2011年第12期31卷 3399-3414页

作者：王雨林茂陈兴群林更铭国家海洋局第三海洋研究所厦门361000

于2009年春(5月)、夏(8月)、秋(11月)在九龙江河口水域进行了水文、化学和生物的生态安全示范区综合外业调查,研究了九龙江河口浮游植物的种类组成、丰度分布、季节变化、空间差异及主要影响因素,并结合前期资料分析了年际变动。结果表... 详细信息

于2009年春(5月)、夏(8月)、秋(11月)在九龙江河口水域进行了水文、化学和生物的生态安全示范区综合外业调查,研究了九龙江河口浮游植物的种类组成、丰度分布、季节变化、空间差异及主要影响因素,并结合前期资料分析了年际变动。结果表明,九龙江河口的浮游植物共记录7门75属135种。主体是硅藻,绿藻次之,甲藻和蓝藻较少,黄藻检出率高,裸藻和金藻零星检出。种类组成的空间差异大,绿藻在河口内区淡水水域比硅藻更占优势。中肋骨条藻(Skeletonema costatum)、浮动弯角藻(Eucampia zodiacus)、圆筛藻(Coscinodiscusspp.)、颗粒直链藻(M elosira granulate)、微小小环藻(Cyclotella caspia)是河口区咸淡水水域及近海区的主要种类。浮球藻(Planktosphneria gelotinosa)、栅藻(Scenedesmusspp.)、盘星藻(Pediastrumspp.)、小席藻(Phorm idium tenus)是河口内区淡水水域的主要种类。根据浮游植物的生态类型及其生境特征大致可分为三大类群。浮游植物丰度夏季最高,平均为116.16×103个/L,密集中心的季节变化明显,丰度分布由优势类群决定。中肋骨条藻和短角弯角藻的细胞丰度庞大,导致优势种突出,多样性低,种间分布不均匀,群落结构简单化。与历史资料比对,种类组成因淡水藻类的列入而更丰富,丰度年际降低,中肋骨条藻仍是第一优势种,但优势度有较大降幅,优势类群有重大年际变化,细胞个体较小的链状硅藻占优。盐度和营养盐对浮游植物的分布及丰度变化造成极大的时空差异,存在较为显著的线性、复合线性、多项回归拟合关系。

关键词：浮游植物季节动态空间分布年际变化环境要素九龙江河口

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防根面龋牙科材料的研究进展

口腔疾病防治 2024年第1期32卷 64-69页

作者：熊净迪程兴群吴红崑口腔疾病防治全国重点实验室国家口腔医学中心国家口腔疾病临床医学研究中心四川大学华西口腔医院老年口腔科四川成都610041

根面龋是老年人口腔常见病和多发病,发病率和未治疗率高,治疗难度大,可迅速进展引起牙髓根尖周病或残冠根,是老年人失牙的重要原因,已成为严重影响老年人生活质量的常见口腔慢性病之一。因此,根面龋早期干预和防治非常重要。传统防根面... 详细信息

根面龋是老年人口腔常见病和多发病,发病率和未治疗率高,治疗难度大,可迅速进展引起牙髓根尖周病或残冠根,是老年人失牙的重要原因,已成为严重影响老年人生活质量的常见口腔慢性病之一。因此,根面龋早期干预和防治非常重要。传统防根面龋牙科材料如氟化物、氯己定等在临床中广泛应用,但是其具有牙齿着色、再矿化及杀菌效率低下等缺点。近年来,一系列新兴防根面龋牙科材料如无机纳米材料、胶原交联剂等逐步成为研究热点,新兴材料具有促进深部牙体组织再矿化、作用时间延长、黏附力增强等优点。未来防龋材料应根据根面龋的特点及应用人群进行设计,朝着简便化、高效化、低毒性方面发展。本文对目前防根面龋牙科材料的研究及应用进行综述,以期能够为防根面龋牙科材料的研究提供理论基础,对促进根面龋的有效预防,改善老年人的口腔健康状况和生活质量具有重要意义。

关键词：根面龋防龋材料再矿化口腔保健人口老龄化龋病预防抗菌材料氟化物