The marine red algae of Rodrigues (Mauritius,Indian Ocean)

This paper reports on the red algae of Rodrigues, collected in the framework of the Shoals of Capricorn Programme (10 September to 5 October 2001). In total 68 species are reported, of which 65 represent new records for the island. Although most taxa represent rather common species, which are generally widespread in the Indian and western Pacific Ocean, some are of special interest to algal systematists and biogeographers. Renouxia antillana is reported for the first time for the Indian Ocean. The presence of Renouxia also constitutes the first record of the order Rhodogorgonales for the entire Indian Ocean. A few species have interesting distribution patterns. Halydictyon sp. is restricted in its distribution to South Africa, Mauritius and Australia. Despite these interesting records, the red algal flora of Rodrigues is most remarkable by the absence of several ‘ubiquitous' species.     

大连沿海13种食用海藻的营养组成分析

对采自大连沿海分属于绿藻门、红藻门及褐藻门的13种食用海藻的有机和无机组成进行了研究,它们的粗蛋白、粗脂肪、粗纤维及总糖含量分别为122-205,1.0-21.8,18-122,359-671g/kg。它们的不饱和脂肪酸含量丰富,约占脂肪酸含量的55%-67%;孔石莼与海萝具有较高的氨基酸含量;测定了13种海藻的矿物质、微量元素和维生素。结果表明：这些海藻含有丰富的氨基酸及不饱和脂肪酸,富含有人体必需的矿物质、微量元素及维生素。为海藻食品的开发,提供了营养评价的参考依据。     

Photosynthetic recovery of desiccated intertidal seaweeds after rehydration

Intertidal seaweeds experience periodical desiccation and rehydration to different extents due to the tidal cycles and their vertical distributions. Their photosynthetic recovery process during the rehydration may show different patterns among the seaweeds from different zonations or depths at intertidal zone. In this study 12 species of seaweeds collected from the upper, middle, lower and sublittoral zones were examined. The relationship of the photosynthetic recovery to vertical distribution was assessed by comparing their patterns of photosynthetic and respiratory performances after rehydration following desiccation. Both the photosynthesis and dark respiration declined during emersion, showing certain degrees of recovery after re-immersion into seawater for most species, but the extents were markedly different from one species to the other. The species from upper intertidal zone after being rehydrated for 1 hour, following 2 hours of desiccation, achieved 100% recovery of their initial physiological activity, while most of the lower or sublittoral species did not achieve full recovery. It is the ability to withstand desiccation stress (fast recovery during rehydration), but not that to avoid desiccation (water retaining ability) that determines the distribution of intertidal seaweeds. Such physiological behavior during rehydration after desiccation reflects the adaptive strategy of intertidal seaweeds against desiccation and their capability of primary production in the process of rehydration.     

几种热带海藻营养成分的分析

采用比色法、直接碘量法和索氏提取法等方法,定量分析了采自海南岛沿岸的细基江蓠繁枝变种、坛紫菜、异枝麒麟菜、石花菜及半叶马尾藻等5种热带海藻的营养成分质量含量,结果表明:这5种海藻的营养成分各不相同,其可溶性糖质量含量的变化范围为25.66%～52.00%;脂肪为0.18%～1.28%;粗蛋白为2.99%～29.05%;纤维素为1.67%～9.67%;维生素C为10.47～12.11μg·g-1.     

渤海沿海几种速生海藻无机营养元素的分析

分析了采自渤海沿海的几种速生海藻的无机营养元素的含量 ,并针对不同生长季节、不同海域对分属于不同门类的 4种海藻富集无机元素的能力进行比较。结果表明 :几种海藻中均含有钾、钙、磷等常量元素和铁、锰、铜、锌等微量元素。其中 ,褐藻门的钾、钙含量最高 ,绿藻门的磷含量最高 ;微量元素中 ,绿藻门的铁、铜含量最高 ,而红藻门的锰、锌含量最高。海藻富集无机元素的能力与海藻种类、生长季节及海域有关     

浙江底栖海藻记录

报导了浙江沿海海藻122属273种,其中蓝藻门8属11种,红藻门73属163种、褐藻门25属50种和绿藻门16属49种。收录1936年至2005年有关文献75篇。     

Temporal variation and structure of macro-epifauna associated with macrophytes in the Bizerte lagoon (Tunisia,SW Mediterranean Sea)

The temporal variation in composition and abundance of the macro-epifauna associated with seaweeds (Ulva lactuca, Cladophora sp., Gracilariopsis longissima and Gracilaria bursa-pastoris) and seagrass (Cymodocea nodosa) was investigated at Menzel Jemil station in the Bizerte lagoon. Twelve replicate samples (25 x 25 cm frame) were collected monthly from October 2009 to September 2010. Sampling data yielded 21,575 invertebrate specimens from floating seaweeds and the seagrass, belonging to 40 taxa, of which 18 species were arthropods, 13 molluscs, three echinoderms, three fishes, two polychaetes and one cnidarian. Crustaceans were the most dominant and the most species-rich group and Idotea balthica basteri the most abundant species, accounting for 28.94% of the total abundance. Minimum (9.25 ± 5.56 species) and maximum (19.75 ± 3.2 species) values of mean species richness were observed in December and June, respectively. Species richness and density of macro-epifauna showed similar trends to plant biomass and the highest values of both indices coincided with periods of maximal plant biomass. Mean values of Shannon’s index H′ and evenness J′ were low, ranging from 0.34 ± 0.02 bit to 1.08 ± 0.06 bit, and from 0.23 ± 0.03 to 0.52 ± 0.07, respectively. The high dominance of herbivores and detritivores highlighted the substantial role played by macrophytes as food source for associated macro-epifauna species. Multivariate analyses also indicated significant seasonal differences for the macro-epifauna assemblage and revealed significant relationships with environmental variables. According to the canonical correspondence analysis, concentrations of phosphates and nitrites, and temperature were the variables that explained the variation of the macro-epifauna abundance in the Bizerte lagoon.     

天然生物前驱体制备微孔／介孔复合多级孔碳材料及其电化学性能的研究

海藻是天然的新型生物碳源,简单而且对环境友好．以各种不同的海藻为前驱体,通过冷冻、干燥和高温碳化制备了的微孔／介孔复合多级孔碳材料．得到的多孔碳材料的比表面积为690m2／g．作为电容器的电极材料,在6mol／LKOH溶液中容量达到150F／g．经ZnCl2活化处理后,电容量高到194F／g．     

人工水草缓流和消波研究

根据室内水流试验和波浪槽试验资料,详细分析了人工水草的缓流和消波特性。研究表明：人工水草草屏的疏密度,排距,相对草高和草场长度对缓流和消波效果有明显影响;适当提高水草疏密度、减少排距,增加草场长度,可获得较好的缓流及消波效果。研究成果为现场布置人工水草场提供了设计依据。     

The marine green and brown algae of Rodrigues (Mauritius,Indian Ocean)

The marine benthic green and brown macroalgae of Rodrigues, collected during an expedition in October 2001, are documented and 18 of the 60 taxa of Chlorophyta (53 species) and 18 species of Phaeophyceae are illustrated. Fifty taxa of green and 12 taxa of brown algae are added to the existing species list of the island. Turf algae and smaller epiphytic species are not or are only sporadically included in this study. All records are listed with bibliographic, biogeographic, taxonomic and nomenclatural comments. Infrageneric identification keys are included. The new combination Caulerpa mexicana var. exposita is proposed and the discovery of a new Udotea species is mentioned. The algal flora of Rodrigues is of a typical Indian Ocean composition but appears to be relatively poor when compared to the nearby island of Mauritius.