洞庭湖区黄颡鱼寄生虫病原多样性调查

系统调查了洞庭湖区主要经济鱼类之一的黄颡鱼寄生虫病原多样性。结果显示：在黄颡鱼的体表、鳃、胃、肠、膀胱、血管、肾、眼球等体内外寄生有23种寄生虫，包括1种动鞭毛虫、3种粘孢子虫、2种纤毛虫、4种单殖吸虫、7种复殖吸虫、1种棘头虫、3种线虫、1种鳋类和钩介幼虫。     

台湾海峡异养性鞭毛虫生态研究I：1997年夏季南部海域鞭毛虫丰度及生物量分布

采用AO染色、荧光计数方法,报道1997年8月台湾海峡南部（117°5’～119°9’E,22°4’～24°3’N）海域异养性鞭毛虫丰度、生物量及其分布.结果表明,调查海域各测站异养性鞭毛虫丰度范围391×103～1846×10     

实验Beagle犬贾第鞭毛虫感染情况调查

为了掌握Beagle犬贾第鞭毛虫的感染情况，本实验室在2009年3月～2010年2月共抽样检测了910只实验Beagle犬，其中109只检测到了贾第鞭毛虫包囊，贾第鞭毛虫感染的总阳性率为11．98％。结果还表明，不同月份间差异极显著，不同性别间差异不显著，幼犬感染率大于成犬，不同年龄组间差异极显著。通过检测可掌握犬群中贾第鞭毛虫的感染情况，对及时诊断、发现并控制疾病的传播有积极的指导意义。     

Study of the varve record from Erlongwan maar lake, NE China, over the last 13 ka BP

In a sediment sequence from Erlongwan maar lake that spans the last 13 ka BP, two main varve types can be recognized： biogenic varves （from the present to -11.2 ka BP, 0-632 cm） and clastic varves （from -11.2 to -12.7 ka BP, 632-700 cm）. Based on the dominant types of algae contained in the sediment, the biogenic varves can be classified into dinocyst-biogenic varves （0-63 cm） and mixed （dinocyst and diatom）-biogenic varves （214-632 cm）. In this paper, the formation process and components of the varve are described, the possible reason for the types of varve changing throughout the record is discussed and a high-resolution varve chronology is established spanning the last 13 ka BP. Although further varve counting and error assessment are needed, the results presented here represent a solid foundation for studying the palaeoclimate record of Erlongwan maar lake.     

我国海洋微型异养鞭毛虫研究:现状与展望

微型异养鞭毛虫作为海洋微食物环的关键环节之一,在海洋生态系统的物质循环、能量流动和营养盐再生等方面扮演极其重要的角色,是当代海洋微食物环研究的重要对象.本文就我国海洋微型异养鞭毛虫研究的现状进行了分析和评述,并结合国际上该领域的研究热点和趋势对今后我国海洋微型异养鞭毛虫研究的主要发展方向进行展望.     

试论"两虫"的可替代检测

从生物学和物理学两方面对新颁布的《城市供水水质标准》中非常重要的微生物指标隐孢子虫和贾第鞭毛虫的可替代检测指标进行了论述和比较,指出虽然还不能找到明确的定论,但研究表明,颗粒计数法仍是目前比较合适的可替代的“两虫”检测方法。     

The oldest known dinoflagellates： Morphological and molecular evidence from Mesoproterozoic rocks at Yongji, Shanxi Province

Abundant and well-preserved organic-walled microfossils including acanthomorphic acritarchs have been found in Mesoproterozoic Beidajian Formation in the Yongji area of Shanxi Province, North China. The morphological and ultrastructural features of these acanthomorphic acritarchs resemble living dinofiagellates (e.g. double-walled and polygonal structures), which leads to the interpretation of these fossils as probably the oldest dinofiagellates. The detection of dinosterane, a dinofiagellate biomarker, from pyrolytic product of these fossils further supports the morphological inference. This finding is consistent with molecular clock estimate that dinofiagellates may have diverged 700 to 900 million years (Ma) before previously known fossil record.     

Identification and evolutionary implication of four novel box H/ACA snoRNAs from Giardia lamblia

During the biogenesis of eukaryotic ribosomes, the nascent pre-rRNA undergoes a complex pattern of nu- cleotide modifications of its mature rRNA sequences, including 2′-O-ribose methylation and pseudouridyla- tion, which are critical for the biogenesis a…     

Marine dinoflagellates from Lower Cretaceous Muling Formation of Jixi Basin,China and their palaeoenvironmental significance

Newly discovered marine dinoflagellates from the lower-middle parts of the Lower Cretaceous Muling Formation of the Jixi Basin, eastern Heilongjiang Province,China, were identified as Circulodinium cingulatum He et al.,C. attadalicum (Cookson et Eiscnack) Helhy, Palaeoperidinium cretaceum Pocock, Oligosphaeridium totum Brideaux and Sentusidinium sp. Most of these species are distributed in the marine Lower Cretaceous strata of Europe, North America,Africa, Australia and Asia. It demonstrates that a transgression occurred in eastern Heilongjiang Province during the deposition of the Muling Formation, which was previously considered to be a coal-bearing continental stratigraphic unit.The marine dinoflagellates indicated that the Muling Formation is Barremian in age. The Palaeogeographic framework of eastern HeUongjiang Province in Late Mesozoic era should be rebuilt through systematic facies analyses of the marine,paralic and terrestrial deposits.     

Trichototaxis songi细胞皮层色素颗粒的显微和亚显微观察

应用微分干涉相差显微术、扫描电镜和透射电镜显微术等显示了腹毛目纤毛虫Trichototaxis songi细胞形态及细胞皮层结构,观察到：细胞皮层存在红色色素颗粒和无色颗粒两种皮层颗粒．皮层色素颗粒与纤毛虫细胞呈现红色有关,它们使细胞的颜色保持不变．作者认为,这些色素颗粒可能已成为细胞皮层结构的基本成分,与纤毛器的功能作用有关;并且它们很可能是一类共生于纤毛虫细胞皮层内及皮层表面的细菌共生体．