红树林单宁的研究进展

植物单宁(vegetable tannin)，又称植物多酚(plant polyphenol)是一类广泛存在于植物体内的多元酚化合物，在维管植物中的含量仅次于纤维素、半纤维素和木质素，主要存在于植物的皮、根、叶、果中，含量可达20％。作为皮革的一种传统鞣剂，单宁一般指的是相对分子质量为500～3000的多酚。Haslam提出了植物多酚这一术语，它包括了单宁及相关化合物(如单宁的前体化合物和单宁的聚合物)。根据化学结构的不同，     

中太平洋西部深海沉积物中的火山碎屑与粘土矿物

对于太平洋深海沉积物的研究虽有很久的历史(如1873-1876年“挑战者”号的科学考察),但对该区开展深入系统的岩石学和矿物学研究却是六十年代以后的事.随着研究手段的发展和进步,已积累了关于该区深海沉积物的大量资料.目前我国的海洋工作者也正在努力开展这方面的科学研究工作.     

智能潜器的集成仿真系统

本文介绍了智能潜器集成仿真系统的硬、软件结构．通过这一系统所展示的水下虚拟仿真环境能够在研究和开发智能潜器的控制体系结构、潜器载体的水动力学、信息融合和目标识别等工作中发挥巨大作用     

A nitrate and silicate budget in the equatorial Pacific Ocean: a coupled physical–biological model study

A coupled physical–biological model was developed to simulate the low-silicate, high-nitrate, and low-chlorophyll (LSHNLC) conditions in the equatorial Pacific Ocean and used to compute a detailed budget in the Wyrtki box (5°N–5°S, 180–90°W) for the major sources and cycling of nitrogen and silicon in the equatorial Pacific. With the incorporation of biogenic silicon dissolution, NH₄ regeneration from organic nitrogen and nitrification of ammonia in the model, we show that silicon recycling in the upper ocean is less efficient than nitrogen. As the major source of nutrients to the equatorial Pacific, the Equatorial Undercurrent provides slightly less Si(OH)₄ than NO₃ to the upwelling zone, which is defined as 2.5°N–2.5°S. As a result, the equatorial upwelling supplies less Si(OH)₄ than NO₃ into the euphotic zone in the Wyrtki box, having a Si/N supply ratio of about 0.85 (2.5 vs. 2.96 mmolm⁻² day⁻¹). More Si(OH)₄ than NO₃ is taken up with a Si/N ratio of 1.17 (2.72 vs. 2.33 mmolm⁻² day⁻¹) within the euphotic zone. The difference between upwelling supply and biological uptake is balanced by nutrient regeneration and horizontal advection. Excluding regeneration, the net silicate and nitrate uptakes are nearly equal (1.76 vs. 1.84 mmolm⁻² day⁻¹). However, biogenic silica export production is slightly higher than organic nitrogen (1.74 vs. 1.59 mmolm⁻² day⁻¹) following a 1.1 Si/N ratio. In the central equatorial Pacific, low silicate concentrations limit diatom growth; therefore non-diatom new production accounts for most of the new production. Higher silicate supply in the east maintains elevated diatom growth rates and new production associated with diatoms dominate upwelling zone. In contrast, the new production associated with small phytoplankton is nearly constant or decreases eastward along the equator. The total new production has a higher rate in the east than in the west, following the pattern of surface silicate. This suggests that silicate regulates the diatom production, total new production, and thereby carbon cycle in this area. The modeled mean primary production is 48.4 mmolCm⁻² day⁻¹, representing the lower end of direct field measurements, while new production is 15.0 mmolCm⁻² day⁻¹, which compares well with previous estimates.     

南沙海域万安盆地地质构造特征

利用在南沙海域万安盆地所采集的地震、重磁资料及钻井、地质资料，对该盆地的地震反向特征，沉积特征、区域地质、构造特征及构造发展史进行了的简要的论述，本文以该区Ｔｇ深度资料为基础，并利用ＣＣＯＰ年刊发表的新生代基底深度资料，初步圈定了万安盆地的边界，并对盆地二级构造单元进行了划分，将盆地划分为５坳３隆、坳隆相间的构造格局。     

九龙江口红树植物叶片重金属元素含量及动态

本文探讨了福建九龙江口潮间带秋茄、木榄、红海榄、白骨壤和桐花树等红树植物叶片重金属元素Ｃｕ、Ｐｂ、Ｚｎ、Ｃｄ、Ｍｎ的含量及动态。结果表明，该河口红树林区表层土壤沉积物元素含量顺序为Ｍｎ〉Ｚｎ〉Ｐｂ〉Ｃｕ〉Ｃｄ；５种红树植物叶片元素含量顺序为Ｍｎ〉Ｚｎ〉Ｃｕ〉Ｐｂ〉Ｃｄ；不同物种叶片元素含量大都有明显差异；叶片对土壤元素富集系数，以Ｍｎ、Ｃｄ较高，Ｐｂ最低；随叶片从幼叶－成熟叶－黄叶的生长发育，Ｍｎ     

黄、渤海沿岸海冰测点代表性浅析

通过分析１９８０年以后的海冰资料和卫星云图照片，对黄、渤海沿岸１１个海冰测点的历史变迁进行了评述，浅析了测点的优劣及使用资料时应注意的事项。     

大鹏澳海域水体磷的形态及其分布特征

根据１９９２年１２月（冬季）和１９９３年７月（夏季）对大鹏澳海域２４ｈ定点连续观测和夏季大面调查，统计了该海域各种形态磷的变化范围和平均含量；计算了各种形态磷分别占总磷（ＴＰ）和总溶解磷（ＴＤＰ）的百分比；讨论了各种形态磷之间的相互关系；分析了影响ＴＰ和ＴＤＰ分布的环境因素。     

Molecular identification of bloom-forming species Phaeocystis globosa (Pryninesiophyta) and its dispersal based on rDNA ITS sequence analysis

The colony-forming Phaeocystis species are causative agents of dense bloom occurrences in coastal waters worldwide. It is difficult to separate them because of the different morphologies associated with their colonial stages. In this study we applied molecular approaches to analyze the genetic variation of Phaeocystis globosa and Phaeocystis pouchetii from several geographic regions, and to assist in tracing the dispersal of bloom-forming Phaeocystis species in coastal waters of China. The sequences of the internal transcribed spacers (ITS1 and ITS2) of rDNA and the 5.8S ribosomal RNA gene of Phaeocystis strains were determined. Sequence comparison shows that P.globosa was the most divergent to P. pouchetii, exhibiting sequence divergence higher than 0.08. However, lower genetic divergences existed between strains of P.globosa. The sequence comparison of the Phaeocystis rDNA ITS clearly shows that the species isolated from the southeast coast of China is identified as P.globosa rather than P. cf. pouchetii or other species. Furthermore, the significance of rDNA variation in distinct global populations of P.globosa suggested it might have had sufficient time to accumulate detectable mutations at the rDNA locus, supporting the hypothesis of ancient dispersal of P.globosa to many areas, meaning that P.globosa blooms in the coastal waters of China are endemic rather than a newly introduced species or a foreign source. Finally, based on the high divergent region of rDNA ITS, a pair of species-specific primers for P.globosa were designed, they could be useful to detect the presence of this species in mixed plankton assemblages or flagellate stages that are recognized with diffculties by means of conventional microscopy.     

山东蓬莱大黑山岛碱性火山岩地球化学特征

庙岛群岛中的大黑山岛出露碱性火山岩,对研究壳-幔过程及黄、渤海演化具重要意义。文中作者对大黑山岛火山岩的常、微量元素、K-Ar年龄及Nd-Sr-Pb同位素体系进行测试确定。结果表明,岩石属钠质碱性玄武岩系列,岩浆岩喷发可分为8Ma前和8Ma后两个阶段;岩石常量元素含量除K2O、Na2O外差异小;随着火山岩的演化,岩浆源区深度变大;大黑山火山岩Nd-Sr-Pb同位素比值与夏威夷洋岛玄武岩相似,其岩浆的地幔端元组分为PREMA DM,又以PREMA为主,并有MORB物质混入。