长江口邻近海域浮游细菌分布与环境因子的关系   总被引：5，自引：0，他引：5  

李云  李道季 《海洋通报》2007,26(6):9-18

利用2003年9-10月"东海陆架水交换"调查航次期间获得的浮游异养细菌、寡营养细菌和光合细菌的分布资料和实测水环境数据,探讨了这三类细菌的分布特征及其与相关环境因子的关系。结果表明:在长江口邻近海域,以30等盐线为界,三类细菌的空间分布具有显著差异;调节制约这三类细菌类群生长和分布的环境因子不同;表层硝酸盐浓度1μmol/L可作为一个特征浓度,高于1μmol/L的海域,陆源输入的硝酸盐对于这三类细菌的生长和分布具有重要影响,低于1μmol/L的海域,硝酸盐的影响较小或无影响。同时,采用法国梅里埃API STAPH系统,结合电镜观察,对两株已获得纯培养的有色菌株进行了属种的鉴定,分别是变异微球菌(Micrococcus varians)和玫瑰微球菌(Micrococcus roseus),目前尚未发现这两种细菌在长江口及其邻近海域分布的报道。  相似文献   

光合细菌对养殖水体的生态调控作用   总被引：20，自引：0，他引：20  

倪纯治  叶德赞 《台湾海峡》1997,16(3):265-269

本文报道了养殖池施用光合细菌后，水中异养细菌、弧苗，发光细菌和光合细菌的消长情况，研究了它们的相互关系。结果表明，添加光合菌后，池水中光合细菌数量增加而弧菌和发光菌数量减少，表明了光合细菌具有调节养殖环境微生态系的作用。  相似文献   

海湾扇贝(Argopecten irradians)附着基异养细菌区系初探   总被引：1，自引：0，他引：1  

李筠  生菊  纪伟尚  徐怀恕 《中国海洋大学学报(自然科学版)》2001,31(1):69-74

从海湾扇贝附着基上分离出61株异养细菌，对其进行80项生理生化特征测定，以数值分类法进行分析。鉴定结果表明，海湾扇贝附着基上异养菌属于假单胞菌(Pseudomonas)、气单胞菌(Aeromonas)、弧菌(Vibrio)、芽孢杆菌(Bacillus)和产碱杆菌(Alcaligenes)。扇贝幼虫附着前附着的细菌主要为芽孢杆菌与假单胞菌，扇贝幼虫附着后气单胞菌成为优势，弧菌数量明显增加，与假单胞菌数量相当。  相似文献   

海洋微生物对石油烃降解的研究 Ⅰ.浙江省海岛海域石油烃降解细菌的生态分布     

史君贤  陈忠元  胡锡钢 《海洋学研究》1997,(4)

本文报导了浙江省海岛海域中石油烃降解细菌的丰度分布及其种群组成。在整个浙江海域所布设的１０２个站位中，９６％的站位可以分离到石油烃降解细菌，其数量分布范围在３．０×１０２～１．１×１０５个／ｄｍ３；低值出现在南麂列岛附近海域；在杭州湾南部水域所布设的２６个站位中１００％的站位可以分离到石油烃降解细菌，其数量分布范围在４０×１０２～１．２×１０５个／ｄｍ３；石油烃降解细菌与异养细菌比值的高低与该海区受油类物质污染程度呈正相关关系；本海区所分离到的石油烃降解菌的优势菌为假单胞杆菌属Ｐｓｅｕｄｏｍｏｎａｓ和黄单胞菌属Ｘａｎｔｈｏｍｏｎａｓ。  相似文献   

Effect of Hydrocarbons and Decontaminating Substances on Bacterial Flora of Coastal Sediments     

Ermanno Crisafi  Renata Zaccone  Lucrezia Genovese  Rosabruna La Ferla  Teresa Luciana Maugeri 《Marine Ecology》1989,10(4):365-375

Abstract. Seventy six samples of coastal sediments collected in the Straits of Messina were studied in order to evaluate the effects of an oil spill and the consequent "clean-up" operations on heterotrophic acrobic bacteria.
In addition, in vitro tests were carried out to estimate the effects of five dispersants on the growth and oil degrading capacity of marine strains isolated from the same sediments.  相似文献   

Benthic control upon the morphology of transported fine sediments in a low‐gradient stream          下载免费PDF全文

James Fox  William Ford  Kyle Strom  Gabriele Villarini  Michelle Meehan 《水文研究》2014,28(11):3776-3788

The structure of fluvial sediments in streams has environmental implications to contaminant fate, nutrient budgeting and the carbon flux associated with fine particulate organic matter (FPOM). However, the influence of sediment structure is lacking in environmental predictive models. To this end, the present study links field‐based results of sediment aggregate structure to seasonal biological functions in the surface fine‐grained laminae (SFGL) of a low‐gradient stream. Fluvial sediment collection, microscopy and image analysis are used to show that aggregates collected over a 20 month time period support the concept that aggregate structure can vary seasonally in low‐gradient streams where temporarily stored sediment is prominent. Results show that the structure of the transported aggregates is more irregular in the summer with the structure being elongated about the long axes. In the winter, the aggregate structure is compacted and more spherical. Statistical analysis and results suggest that heterotrophic and autotrophic biological activity within the SFGL exhibits seasonal control upon the morphology of transported sediments. Implications of this research are highlighted through calculations of the reactive surface area of the transported suspended sediment load. The surface area of transported sediment is estimated to be 40% greater in the summer as compared to the winter time period, which implies that (i) the affinity of sediments to sorb contaminants is higher in summer months and (ii) the downstream reactivity of FPOM in large rivers, lakes and estuaries is not just a function of microbial drivers but also the seasonally dependent structure of transported FPOM derived from low‐order streams. Copyright © 2013 John Wiley & Sons, Ltd.  相似文献   

Effect of Ecological Factors on the Distribution of Microorganisms in Regosols (Steppe of Priol’khonie, Siberia)     

Olga LOPATOVSKAYA  Anna SEREDKINA  Natalia BELKOVA 《《地质学报》英文版》2014,88(Z1):188-190

正1 Introduction Regosol in Eastern Siberia is intrazonal soil.In Priolkhonie region it occurs among chestnut soils,salt marshes and solonetzes.There are small information about Tagotskij hydrolaccolith in the research articles of geologists,archaeologists,and paleolimnologists when  相似文献   

Community structure and grazing of the nano-microzooplankton on the continental shelf of the Bay of Biscay     

Christine Dupuy  Agathe Talarmin  Hans J. Hartmann  Daniel Delmas  C. Courties  Elise Marquis 《Estuarine, Coastal and Shelf Science》2011

In order to investigate the parameters controlling the heterotrophic protists (nano-microzooplankton) on the continental shelf of the southern Bay of Biscay, plankton communities and their physico-chemical environment were studied 4 times in February, April, June and September–October 2004 at three stations in the euphotic zone in the Bay of Biscay. The abundance and carbon biomass of heterotrophic protists (ciliates, heterotrophic dinoflagellates and nanoflagellates) as well as all the others groups of plankton (picoplankton, nanophytoplankton, diatoms, autotrophic dinoflagellates, metazoan microzooplankton and mesozooplankton), the environmental parameters and the primary and bacteria production were evaluated at each sampling period. Microzooplankton grazing experiments were undertaken at the same time. Ciliates and heterotrophic dinoflagellates accounted for the main major component of nano- and microzooplankton communities in term of biomass. The total carbon biomass of heterotrophic protists was highest in spring and lowest at the end of summer. The development of heterotrophic protists started after a winter microphytoplankton bloom (principally large diatoms), the biomass was lower in June and was low in September (through inappropriate prey). The carbon requirement of microzooplankton ranged from 50 to more than 100% of daily primary, bacterial and nanoflagellate production. The heterotrophic protist community was predominantly constrained by bottom-up control in spring and at the end of summer via food availability and quality.  相似文献   

HETEROTROPHIC BACTERIOPLANKTON PRODUCTION IN THE EAST CHINA SEA     

肖天  王荣  岳海东 《中国海洋湖沼学报》2001,19(2):157-163

ＩＮＴＲＯＤＵＣＴＩＯＮＭｏｒｅｔｈａｎａｄｅｃａｄｅｈａｓｐａｓｓｅｄｓｉｎｃｅｂａｃｔｅｒｉａｗａｓｒｅｃｏｇｎｉｚｅｄａｓｑｕａｎｔｉｔａｔｉｖｅｌｙｉｍｐｏｒｔａｎｔｃｏｎ ｓｕｍｅｒｓｏｆｏｒｇａｎｉｃｃａｒｂｏｎｉｎｍａｒｉｎｅｆｏｏｄｗｅｂｓａｎｄｍａｒｉｎｅｅｃｏｓｙｓｔｅｍｓ (Ｆｕｈｒｍａｎ ,1 992 ) .ＴｈｅｂａｓｉｃｉｎｆｏｒｍａｔｉｏｎｏｎｔｈｅｓｉｇｎｉｆｉｃａｎｃｅｏｆｔｈｅｍｉｃｒｏｂｉａｌｆｏｏｄｗｅｂｗａｓｐｒｅｓｅｎｔｅｄｂｙＰｏｍｅｒｏｙ ( 1 974 ) ,ｗｈｏｐｉｅ…  相似文献   

科尔沁沙地玉米(Zea mays)田垄上和垄间土壤呼吸比较     

张风霞  韩娟娟  陈银萍  李玉强  连杰  岳祥飞  王新源 《中国沙漠》2014,34(2):378-384

采用动态密闭气室法测定分析了科尔沁沙地典型玉米(Zea mays)农田垄上和垄间土壤呼吸速率的差异及自养和异养呼吸特征,并估算了生态系统碳平衡。结果表明:(1)垄上和垄间土壤呼吸速率存在极显著差异(p0.001),且存在线性关系(p0.05);季节水平上垄上土壤呼吸可解释垄间土壤呼吸98.4%的变异。(2)季节水平上土壤总呼吸(RS)、异养呼吸(RH)和自养呼吸(RA)的温度敏感性指数Q10大小顺序为:RA(4.35)RS(3.10)RH(2.08)。(3)RS和RH之间存在显著差异,RA与RS和RH之间不存在显著差异;RA占RS比例的季节变化范围为28.1%~71.1%,生长季RH和RA占RS的比例均值分别为44.4%和55.6%。(4)科尔沁沙地典型农田生态系统在生长季为碳汇,可净固存大气CO2-C的量为659.1g·m-2。  相似文献