The Role of Isopod Crustaceans in the Reef Crest Community at Carrie Bow Cay, Belize

Abstract. The species composition and numbers of specimens of isopod crustaceans from the rubble of a Belizean reef crest were obtained. Four sets of 30 samples were taken from three rubble zones (rubble with algal turf, rubble between Thalassia plants, and pure rubble), in four different collecting periods. Twenty-four species of isopods were identified, sexed and counted. By means of a Likelihood Ratio Chi-square Contingency Table Analysis the presence of 13 species was shown to be positively correlated with habitat, 15 species with season, and nine species with habitat and season combined. From the spread of total numbers and of ovigerous females it is proposed that the isopods may be grouped into three patterns: a) those present and breeding in the reef crest rubble throughout the year, i. e. stress-tolerant species; b) those showing a breeding peak in summer and a population decrease in winter-spring, i. e. opportunist species; and c) those showing a breeding peak in the fall, and a second peak in spring, and a decrease or complete avoidance of the habitat, especially by ovigerous females, in the summer. The diversity of the Belizean reef crest isopod fauna is compared with the published report of the isopod fauna of a coral reef in Madagascar. Several similarities in composition are noted. The multiplicity of microhabitats is invoked as a possible explanation for the relatively high diversity of anthuridean isopods in coral reefs.     

台湾海峡西岸林进屿古火山喷口群的地貌成因

由纯火山岩组成的林进屿位于台湾海峡西部近岸海中，熔岩喷发年代为上新世。这个典型的火山岛自早全新世海进到达这里以后的6－7ka以来，长期处于大风浪冲击的环境而导致海岸纸后退，并在海蚀崖滩上塑造出各种奇形怪状的火山地貌，裸露出一系列小型的古火山喷口群和火山颈。研究林进屿火山岛的地貌成因不仅具有一定的科学意义，尤其将引起国内外地学界特别是海峡两岸学术界的兴趣。     

涠洲岛珊瑚礁生态系中浮游动植物与环境因子关系的初步探讨

本文根据1990年4月、10月间的理化分析数据，结合2002年9月涠洲岛珊瑚礁生态环境的调查状况，首次从珊瑚礁生态系的角度初步探讨该岛区浮游动植物与环境因子的关系。结果表明：该岛区浮游动植物的分布具有明显的区域性和季节性，既体现了珊瑚礁生态系具有较高的初级生产力特征，也体现了浮游动植物具有显著的季节交替现象。相关分析显示，水温、盐度、N，P，Si营养盐对浮游植物的种类组成及数量变动均有明显影响，但对浮游动物的影响不大；N是该生态系中浮游植物的限制因子，P限制状况只有在珊瑚礁生长带较深的海域出现，Si呈相对富足状态。     

The Contribution of Secondary Space to Benthic Taxon Richness of a Coral Reef: Colonisation of Dendrostrea frons (Mollusca)

Abstract. The reef‐dwelling oyster Dendrostrea frons occupied only a small proportion of space in coral reefs of the Quirimba Archipelago, Mozambique, but supported a disproportionately high variety of taxa. Assemblages on primary (substratum), secondary (dead coral heads) and ephemeral secondary space (D. frons shells) of similar area were compared across 5 depths (5, 10, 15, 20 and 25 m) and at four taxonomic levels (species, genus, class and phylum). Differences between the taxonomic richness of each type of space differed with both taxonomic level considered and depth. Of the three categories of space considered, ephemeral secondary space had the most taxa at all levels with the maximum at 10 – 15 m. Despite being small in space and time, animal externa, such as shells of D. frons, may provide important niches for particular organisms at many taxonomic levels.     

东亚岛弧地形横剖面与板块运动

通过对东亚岛弧横剖面形态的系统分析，并结合弧前的构造应力的分析，作者认为，东亚岛弧形成于板块东移的构造环境中，横剖面形态存在两种基本类型即内缓外陡型和内陡外缓型，这两种不同的横剖面具有不同的弧前应力，前者表现弧前挤压，后者表现弧前引张，这反映地貌形态与构造应力之间的密切关系。     

Coastal geomorphic evolution at the Denglou Cape, the Leizhou Peninsula

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南海卡氏豆荚软珊瑚化学成分研究Ⅱ

运用光谱分析和GC－MS方法首次从卡氏豆荚软珊瑚Lobophytumcatelai中分离和鉴定出8个化合物：l，十六碳酸；2,异丁基十六碳酸酯；3，鲨肝醇；4十六酸丙酯；5，2，3一二羟基丙基十八酸酯；6，2β，3β-环氧基-5α-雄甾烷-17-醇；7，14-甲基-5α-胆甾-8-稀-3-酮；8，2α，3α一环氧基-5α-雄甾烷-17-醇。     

三亚水域造礁石珊瑚移植试验研究

１９９３年３－１０月，在海南岛三亚市鹿回头浅海水域进行人工移植石珊瑚（１８种）和多孔螅（１种）试验。共移植４４个样品。６个月后观察，仅有８个石珊瑚自然脱落，３个死亡。存活的珊瑚中，有２３个出现了轴向或水平扩展的生长迹象。同时还发现移植后所产生的局部生态学效应。试验结果为利用人工礁技术促进珊瑚礁生态环境的恢复提供了一个有效的手段。     

东海海底地形分区特征和成因研究

东海一直以其特殊的大地构造地位受到国内外地学界的关注,但作为主要受构造控制的东海海底地形的研究,以往简单趋势性描述居多,专门深入系统的研究尚不多见。不久前完成的高精度、全覆盖多波束海底地形勘测覆盖了东海部分外陆架、大陆坡全部、冲绳海槽和东部岛坡的一部分,取得了海量的测深数据。据此编绘的勘测多波束水深图和结合测区外的传统资料编绘的海底地形图使我们有机会可以重新审视和系统研究东海的海底地形特征。在定量确定了陆架坡折线、陆坡坡脚线和东部槽坡坡脚线的基础上划分出了大陆架、大陆坡、冲绳海槽平原和东部岛坡4大地形区,继之对各区的海底地形特征进行了研究和描述,并在区内选取了有代表性的5条剖面进行了剖析。另外,从地球内营力和外营力两方面分析了影响东海海底地形发育的因素。调查分析表明:整个东海地形分带明显,地形类型多样:大陆架十分宽阔,总体北宽南窄,从大陆向海平缓倾斜,发育了广泛的NW-SE向沙脊群,自大陆向东南呈扇形发散;大陆坡呈NE-SW向条带展布,海底地形陡峻,呈阶梯状下掉,总体北缓南陡,其上峡谷密布,上穿切外陆架,下直达海槽,同时坡麓上海台沟谷伴生发育;冲绳海槽北浅南深,其内在平坦的背景上发育了众多的海山和海丘,其中心又有槽中槽地形;东槽坡地形复杂,发育了