Diatom Ecotype of Habitation and Their Distribution in Surface Sediments around Xiamen Island and in Taiwan Straits

对厦门岛沿岸46个取样点表层沉积样品分析,共发现硅藻62个属的217个种及亚种;对台湾海峡44个取样点表层沉积样品分析,共发现硅藻36个属的181个种及亚种.各个取样点都有底栖种和浮游种出现,水浅的区域(厦门岛沿海)底栖种比例较高,水深的区域(台湾海峡)浮游种比例较高,硅藻对指示水深具有科学研究价值.底栖种和浮游种的比例可能还受水体流动性、地貌特征等因素的综合影响.Having analyzed the samples of surface sediment from 46 sites around Xiamen Island,217 species or subspecies in 62 genuses of diatoms were found.And also 181 species or subspecies in 36 genuses were found from the samples at the 44 sites in Taiwan Straits.Both benthic and plankton diatoms were found at each site. More benthic diatoms are in shallow areas,around Xiamen Island,but more plankton are in deep areas,in Tai- wan Straits.The ratio of benthic and plankton should be infected synthetically by the factors such as the move- ment of water and the physiognomy.国家自然科学基金资助项目(40076016,40276021);; 国家海洋局第二海洋研究所海底重点开放实验室资助项目(2002-4);; 贵州大学基金资助项目(2001-9

A preliminary study on nanodiatoms from Holocene sediments in the Jiulong River and Dongyu Island of Fujian Province, China

利用透射电镜研究了九龙江口现代潮间带表层沉积物、九龙江地区中全新世剖面和东屿中-晚全新世剖面的微型硅藻(细胞大小为2～20μm)的组成和丰度.共计硅藻12属26种(包括变种).对每个种的生态分布作了描述,并提供了相应的壳面电镜照片.Thalassionemanitzschioides是九龙江口现代潮间带表层沉积物中的优势种;九龙江中全新世地层的优势种为Naviculaclimacospheniae,Thalassionemanitzschioides;东屿中-晚全新世地层中,Cyclotellastriata,Thalassionemanitzschioides是优势种.微型硅藻在各个样品中所占比例都相对较高,最高可达86.7%,表明微型硅藻在沉积硅藻中占有重要的地位. 【英文摘要】 The species composition and cell density of nanodiatoms(cell size smaller than 20 μm) were investigated with TEM for the sedimental samples from different sedimental sections at modern intertidal zones and Middle Holocene in the Jiulong River, and in Dongyu Island in late Middle Holocene and Late Holocene. In total, 26 diatom species (including varieties) belonging to 12 genus of Bacillariophyta were found. The ecological distribution of each species was described together with TEM photographs. The dominant...国家自然科学基金资助项目(40076016)

Preliminary Studies on Nanodiatoms in Sedimental Samples of Wenzhou City and Zhenhai City in Zhejiang Province and Jiulong River in Fujian Province

利用透射电镜研究了温州早、中全新世剖面,九龙江地区晚全新世中期剖面和镇海晚全新世剖面的微型硅藻(细胞大小为2～20μm)的组成和丰度.共计硅藻14属20种(包括变种).Cyclotellacaspia是九龙江地区晚全新世中期剖面中的优势种;温州中全新世剖面的优势种为Cyclotellastriata;温州早全新世剖面和镇海晚全新世剖面中Thalassionemanitzschioides是优势种.微型硅藻在几个剖面中所占的比例变化较大,以在九龙江地区晚全新世中期剖面所占的比例最高,可达77.4%,表明微型硅藻在沉积硅藻中占有重要的地位. 【英文摘要】 The species composition and density of nanodiatoms in sedimental sections were studied by TEM for the sedimental samples from different sedimental sections in Early and Middle Holocene in Wenzhou city in Zhejiang province?in later Holocene in estuary of Jiulong River in Fujian province and in Zhenhai city in Zhejiang province. In total, 20 diatom species (including varieties) belonging to 14 genera of Bacillariophyta were described and the ecological distribution of each species was described together with ...国家自然科学基金(40076016)资