A bio-engineered soft-bottom environment: The impact of Lanice conchilega on the benthic species-specific densities and community structure   总被引：2，自引：0，他引：2  

Marijn Rabaut  Katja Guilini  Gert Van Hoey  Magda Vincx  Steven Degraer 《Estuarine, Coastal and Shelf Science》2007,75(4):525-536

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发光细菌一新种──青海弧菌   总被引：36，自引：0，他引：36  

朱文杰  汪杰  陈晓耘  扎西次仁  杨韵  宋瑛 《海洋与湖沼》1994,25(3):273-279

于１９８５年８月从青海湖产的青海裸鲁体表分离到７０株发光细菌，通过表型特性分析，超氧化物岐化酶的凝胶双向扩散试验，以及Ｇ＋Ｃ摩尔百分比测定进行鉴定分类。结果表明，７０株发光细菌在表型特性，免疫学特性等方面彼此高度相似，但与已知的各种发光细菌有显著差异。鉴定为弧菌属的一个新种，定名为青海弧菌Ｖｉｂｒｉｏｑｉｎｇｈａｉｅｎｓｉｓｓｐ．ｎｏｖ．。典型菌株保存于华东师范大学生物系。  相似文献   

海洋细菌对钢的腐蚀作用     

徐怀恕  纪伟尚  胡锡钢  宋庆云 《中国海洋大学学报(自然科学版)》1989,(1)

从青岛港钢板桩的锈层中分离到三种腐蚀性细菌。经鉴定这三种细菌是氧化硫杆菌(Thiobacillus thiooxidans),排硫杆菌(Thiobacillus thioparus)和脱硫脱硫弧菌(Desulfovib-iodesulforicans)。用失重法测定了这三种细菌对四种钢样的腐蚀速率。氧化硫杆菌的腐蚀速率为53.5m.d.d.(毫克/平方分米/天)(BJ_2),83.3(902),121.8(CXL-4)和81.0(7~#)。排硫杆菌的腐蚀速率为23.6mdd(BJ_2)。脱硫脱硫弧菌的腐蚀速率为9.9m.d.d.(BJ_2),9.2(902),3.7(CXL-4)和2.9(7~#)。这三种细菌对钢都具有很强的腐蚀能力。  相似文献   

Increase in Cliona delitrix Infestation of Montastrea cavernosa Heads on an Organically Polluted Portion of the Grand Cayman Fringing Reef     

Christopher S.  Rose Michael J.  Risk 《Marine Ecology》1985,6(4):345-363

Abstract. A marked increase in the biomass of Cliona delitrix infesting Montastrea cavernosa substrate occurred in a portion of the Grand Cayman fringing reef affected by the discharge of untreated fecal sewage. It is suggested that the six-fold increase in bacteria biomass (both "coliforms" and natural marine bacterioplankton) in reef waters receiving the sewage effluent is linked to a five-fold increase in sponge biomass at the polluted site relative to a control site. The elevated density of C. delitrix biomass signifies a similar increase in the amount of M. cavernosa skeleton that has been eroded by this sponge and reduced to silt-sized sediment. Thus, the proliferation of a bioeroding organism in the sewage-stressed environment has caused a shift in the carbonate balance on the reef.  相似文献   

含氯消毒剂用于细菌性虾病防治的药理     

王勇强 《中国海洋大学学报(自然科学版)》1992,(4)

探讨次氯酸钙和二氯异氰尿酸钠两种代表性含氯消毒药物,为含氯消毒剂应用于细菌性虾病的防治提供理论依据。实验表明:有效氯在海水中的丧失随温度上升、pH值下降而加速。常见对虾病原菌对有效氯非常敏感,有机物增加、pH值上升使杀菌率下降。两种药物对实验中国对虾的48h半致死浓度为2.74～2.88mg/L有效氯。长期施以高于安全浓度的药物对实验虾之存活率、增长率等指标无不良影响,施药组发病率远远低于对照组。  相似文献   

海带对褐藻酸降解菌的抗性与其SOD活性的相关性     

刘成圣  杨震  唐学玺 《海洋科学》2002,26(2):1-2

运用生物化学的方法测试了2个品系的海带对褐藻酸降解菌抗性的差异性，并对其SOD活性的高低进行了研究。结果表明，海带荣成1号（简称NO.1）对褐藻酸降解菌的抗性远远高于海带901（简称901）；海带荣成1号细胞内超氧化物歧化酶（SOD）的活性明显高于海带901，二者显著正相关。说明海带SOD活性的高低与其对褐藻酸降解菌的抗性大小有一定的相关性。  相似文献   

解磷菌分离及其对内蒙古布龙图低品位磷矿利用研究   总被引：1，自引：0，他引：1  

田晓娟  杜德平  王艳  吴永慧  彭立娥 《地球学报》2007,28(4):377-381

从内蒙古布龙图磷矿区表层土壤中取样,分离得到了几个解磷菌株,测定了每个菌株的解磷能力.分离的芽孢杆菌(Bacillus sp.)A20、AC2013和AC2015,对Ca3(PO4)2和磷矿石粉中磷的分解率为21%～25%,它们对磷的分解具有协同效应.用A20和AC2013的菌液制成的生物复合磷肥施于马铃薯,增产23.08%,微生物法将成为利用北方低品位磷矿的有效途径之一.  相似文献   

Effects of solar radiation on the fate of dissolved DMSP and conversion to DMS in seawater     

Doris Slezak  Ronald P. Kiene  Dierdre A. Toole  Rafel Simó  David J. Kieber 《Aquatic Sciences - Research Across Boundaries》2007,69(3):377-393

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Aerosol bacteria over the Southern Ocean during ACE-1     

Mihly Psfai  Jia Li  James R. Anderson  Peter R. Buseck 《Atmospheric Research》2003,66(4):231

Individual bacterial cells occur in many samples that were collected at Cape Grim, Tasmania and during the Lagrangian “B” experiment of the Aerosol Characterization Experiment 1 (ACE-1) campaign that was conducted above the Southern Ocean. They are present in samples from altitudes as high as 5.4 km. Morphologically, almost all bacteria are rod-shaped, about 1 μm long or smaller, have one polar flagellum, and contain inclusions that are rich in P and K. Their morphological features suggest that these bacteria are motile, marine species. It seems likely that the cells became airborne by the same bubble-bursting mechanism that ejects sea-salt aerosol particles into the atmosphere; however, the bacteria and sea-salt particles are typically not aggregated with one another. The estimated number ratio of bacteria and the dominant aerosol species, sea salt, varies in the samples and averages about 1%. The aerosol bacteria seem to represent an important atmospheric reservoir of P and organic compounds; on the other hand, since they are externally mixed with sea salt, they are unlikely to be effective as cloud condensation nuclei.  相似文献   

新疆阔尔真阔腊金矿床中伴生钴的发现及其找矿地质意义   总被引：6，自引：0，他引：6  

尹意求  李嘉兴  唐红松  胡兴平  陈大经  仇银江  马忠美 《矿产与地质》2003,17(1):1-5

阔尔真阔腊金矿床位于新疆准噶尔西北缘的萨吾尔山东部,形成于晚古生代岛弧构造环境,受隐爆角砾岩筒控制,其容矿岩石为中泥盆统萨吾尔山组的岛弧型富钠质安山岩。金矿石中硫化物的钴含量较高,为0.007×10-2～0.15×10-2,平均0.04×10-2。19个样中,Co≥0.02%的有14个,占74%,往深部钴含量有变富倾向。建立了阔尔真阔腊浅成低温热液金矿床二阶段成矿的套叠式结构找矿模型,开拓了阔尔真阔腊矿区的找矿思路。阔尔真阔腊金矿床中伴生钴的发现具有重要的找矿地质意义。  相似文献