厦门湾沉积物中有害有毒甲藻休眠孢囊及塔玛亚历山大藻的潜在危害   总被引：7，自引：0，他引：7  

蓝东兆  方琦  顾海峰  李超 《台湾海峡》2004,23(4):453-457,i005

本工作通过分析厦门湾表层沉积物中的甲藻休眠孢囊，发现了1种有毒塔玛亚历山大藻(Alexandrium tamarense)休眠孢囊，及两种有害甲藻休眠孢囊：锥状斯氏藻(Scrippsiella trochoidea)、具刺膝沟藻(Gonyaulax spinifera)．对塔玛亚历山大藻进行了培养。并初步研究了该藻的毒性及贝类对其毒素的积累．研究结果表明，厦门海域沉积物中的塔玛亚历山犬藻是有毒的．它的较适宜生长环境条件是：水温20～25℃．盐度为25～30，光照度为3000～50001x．塔玛亚历山大藻在每年的4月26日至6月10日、10月11日至11月20日可能会形成有害藻华，危害厦门海域的海洋生物并可能威胁到人类的健康和生命安全．  相似文献   

平鲷♀与真鲷♂的杂交研究   总被引：14，自引：0，他引：14  

江世贵  李加儿  区又君  钟创光  喻达辉 《海洋科学》1997,21(5):33-38

研究了不同盐度，温度，ｐＨ对平鲷Ｒｈａｂｄｏｓａｒｇｕｓ ｓａｒｂａ♀和真鲷Ｐａｇｒｏｓｏｍｕｓ ｍａｊｏｒ♂清子活力的影响，确立了人工授精与孵化的条件参数。平鲷♀与真鲷♂杂交的受精率达９５％以上，胚胎发育与其亲本的相似。经过超低温保存的真鲷精子的激活率，活力与鲜精的接近，其杂产的受精率也可达９５％以上。实验获得了杂产仔鱼，但杂交的孵化率比对照组低。  相似文献   

冲绳海槽北部稀土元素沉积地球化学研究   总被引：4，自引：1，他引：4  

翟世奎  陈志华 《海洋地质与第四纪地质》1996,16(2):47-56

本文对冲绳海槽北部海底表层沉积物和４个柱将苦芯沉积物样品的稀土元素沉积地球化学特征进行了系统的分析。研究结果表明：调查区表层沉积物ＲＥＥ的分布主要与沉积物的物质组成有关，特别是海洋生物沉积物组份的比例不仅影响ＲＥＥ总量的分布，而且影响标准化ＲＥＥ分布模式的形态。  相似文献   

增氧机自动控制电路     

钟文颖  张钟世 《中国海洋大学学报(自然科学版)》1995,(Z1)

介绍作者自行设计、研制的控制增氧机运行时间的自动控制电路及其原理．该电路采用ＣＭＯＳ集成芯片，结构简单、工作可靠，价格低，业经试验证实：各项性能指标均符合要求．  相似文献   

VERIFICATION OF INTERNAL WAVES IN OFFSHORE AREAS BY MEANS OF CURRENT OBSERVATIONS     

束星北  耿世江  顾学俊  孙洪亮  王祯祥  赵俊生 《海洋学报(英文版)》1986,5(2):165-172

Based on the shear effect of internal wave currents in stratified fluid, the necessary condition for the possible existence of an internal wave and the sufficient condition under which there will be no internal wave are deduced starting from the continuity equation of incompressible fluid. The above two conditions are verified by the measured results from vertical current meter arraies at some observation stations in the Bohai Sea and the South Huanghai Sea. In the treatment of measured results, first of all, the tidal period components are separated from the measured currents by Fourier-analysis method, and then the internal wave currents of tidal period from the tidal period components in the light of some considerations. The analytical results of observed currents are well consistent with theoretical analysis. Furthermore, one can also deduce some features of internal waves therefrom. Consequently, it is concluded that the observation from a vertical current meter array is an important means to verif  相似文献   

Current status of bacteriological parameters and DOC/POC in Xiamen coastal waters   总被引：2，自引：0，他引：2  

Khalid Maskaoui  Tianling Zheng  Huasheng Hong  Zhiming Yu  Zhong Hu  Yun Tian  Lizhe Cai 《海洋学报(英文版)》2003,22(3):443-451

The surface and bottom waters samples were collected from six locations in Xiamen western sea. The quantified estimation of bacterial production (3H-thymidine method) and observation of bacterial heterotrophic activity (14C-glucose method) have been made in order to have a better understanding of the role of marine bacteria and their activities. The results showed that the mean value of bacterial heterotrophic activity was 9×108 cells/(L.h) in the surface waters and 2.6×108 cells/(L.h) in the bottom waters. The mean value of bacterial production was 38×108 cells/(L.h) in the surface waters and 7.1×108 cells/(L.h) in the bottom waters. The relationship between bacterial production, heterotrophic activity, POC and DOC measured during this survey were discussed. The good understanding of the relationship between bacteria activity and total coliform was addressed.  相似文献   

秦山核电站邻近水域石油降解细菌的生态学研究     

陈忠元  史君贤 《海洋学研究》1991,9(2):48-53

本文分析了1989年4月(春),7月(夏),10月(秋)和1990年1月(冬)秦山邻近水域表层水中石油降解细菌的丰度和分布规律,同时比较了温度、含油量、营养盐、溶解氧、盐度等环境因素对其数量变动的影响。分析结果发现,测区表层水中石油降解菌数量最高值达1.1×10~5个/dm~3,最低值为400个/dm~3,季节变化波动于97～4.9×10~4个/dm~3之间,菌量变化与水温,含油量呈正相关,与盐度呈负相关趋势,认为测区高营养盐、高溶解氧状况可能不成为石油降解细菌生长繁殖的限制因子,并指出测区低丰度的石油降解菌数量与该海区低水平的油污是一致的。  相似文献   

福建罗源湾海滩互花米草盐沼中18种金属元素的分布   总被引：13，自引：0，他引：13  

钦佩  谢民  仲崇信 《海洋科学》1989,13(6):23-27

本文对福建罗源湾可湖海滩互花米草盐沼中的18种金属进行了测试,结果表明,罗源湾可湖海滩的环境质量基本是好的,并探讨了开发利用互花米草的新途径。  相似文献   

Numerical Study on Instantaneous Discharge of Unsorted Particle Cloud in Cross Flow     

顾杰  李志伟杨红 詹咏 《中国海洋工程》2007,21(2):305-316

The mixing characteristics of particles such as dredged sediment of variable size discharged into cross flow are studied by a 3D numerical model, which is developed to model the particle-fluid two-phase flow. The Eulerian method with the modified k-ε parameterization of turbulence for the fluid phase is used to solve fluid phase, while a Lagrangian method for the solid phase (particles), both the processes are coupled through the momentum sources. In the model the wake turbulence induced by particles has been included as additional source term in the k-ε model; and the variable drift velocities of the particles are treated efficiently by the Lagrangian method in which the particles are tracked explicitly and the diffusion process is approximated by a random walk model. The hydrodynamic behavior of dumping a cloud of particles is governed by the total buoyancy of the cloud, the drag force on each particle and the velocity of cross-flow. The computed results show a roughly linear relationship between the displacement of the frontal position and the longitudinal width of the particle cloud. The particle size in the cloud and the velocity of cross flow dominate the flow behavior. The computed results are compared with the results of laboratory experiments and satisfactory agreement is obtained.  相似文献   

南沙群岛珊瑚礁地貌图像信息管理系统     

傅孙成  钟晋梁  张乔民  刘清祥  熊永兰 《热带海洋学报》1998,(3)

运用面向对象的软件开发技术,结合珊瑚礁地貌学、计算机图像学和计算机信息管理技术,在Windows平台上研制开发出南沙群岛珊瑚礁地貌图像信息管理系统。该系统集文件管理、数据库管理和图形、图像管理于一体,具有信息检索输出、信息编辑和信息维护等功能,以图形用户介面交互,达到"所见即所得"的效果。  相似文献