Epipont peritrich ciliates are one of the most sessilie protists that attached to the substrate of zooplankton communities especially copepods and crustaceans. Peritrich ciliates can be solitary or colonial form found...Epipont peritrich ciliates are one of the most sessilie protists that attached to the substrate of zooplankton communities especially copepods and crustaceans. Peritrich ciliates can be solitary or colonial form found from the coastal zones and embayment around the world. Present research report is the first snapshot study of the peritrich ciliates and the horizontal distribution in open waters from surface to 200 m depth in the eastern Indian Ocean. Recently, five peritrich ciliates, e.g., Vorticella oceanica, Zootharnnium alternans, Z. alrasheidi, Z. pelagicum, and Z. marinum were collected from plankton net tow samples during the cruise from April 10 to May 13, 2014. The characteristics of the peritrich ciliate were determined according to the shape of the zooids, the ciliary structure and the stalks. The morphometric shape, sizes and characters also explained by examination under light/scanning electron microscopy. Vorticella oceanica and Z. pelagicum showed their association with host such as diatom （i.e, Chaetoceros coarctatus） and copepod （Oithona brevicornis） including some individuals around the dinoflagellate species （Ceraitum tripose）. The distribution of these sessilid ciliates was dominated by the V. oceanica, Z. pelagicum and Z. rnarinurn at the southeast zone while the large colonies of Z. alrasheidi observed at the Bay of Bengal. This distribution can be influenced by substrate availability like diatom （Ch. coarctatus） and copepods （O. brevicornis）.展开更多
涉及近年来采集自青岛沿海的自由生聚缩虫属纤毛虫14种,包括9个国内新纪录:交替聚缩虫Zoothamnium alternans Claparède & Lachmann,1859,弗氏聚缩虫Z.foissneri Ji et al.,2005,黑凯聚缩虫Z.hiketes Precht,1935,海洋聚缩虫Z....涉及近年来采集自青岛沿海的自由生聚缩虫属纤毛虫14种,包括9个国内新纪录:交替聚缩虫Zoothamnium alternans Claparède & Lachmann,1859,弗氏聚缩虫Z.foissneri Ji et al.,2005,黑凯聚缩虫Z.hiketes Precht,1935,海洋聚缩虫Z.marinum Mereschkowski,1879,霉聚缩虫Z.mocedo Entz,1884,倪氏聚缩虫Z.nii Ji et al.,2005,拟树状聚缩虫Z.pararbuscula Ji et al.,2005,王氏聚缩虫Z.wangi Ji et al.,2005,许氏聚缩虫Z.xuianum Sunetal.,2005;以及其他5个已知种:群栖聚缩虫Z.commune Kahl,1933,双缘聚缩虫Z.duplicatum Kahl,1933,巨大聚缩虫Z.maximum Song,1986,羽状聚缩虫Z.plumula Kahl,1933,中国聚缩虫Z.sinense Song,1991。对以上各种作了简要的综合性描述,并给出了种检索表。展开更多
In this paper, we explore possible conflict between morphological and molecular interpretations of phylogenetic relationships within the well-known peritrichous genus Zoothamnium. On the basis of morphological evidenc...In this paper, we explore possible conflict between morphological and molecular interpretations of phylogenetic relationships within the well-known peritrichous genus Zoothamnium. On the basis of morphological evidence, for a long time this genus has been believed to be a well-defined monophyletic taxon. Nonetheless, Zoothamnium exhibits higher genetic diversity than the gross morphology of its species. Here, we used all available genetic information for the small subunit of ribosomal RNA （SSU rRNA） and internal transcribed spacer region （ITS1-5.8S-ITS2） for this genus to reconstruct phylogenies for four datasets （SSU rRNA, ITS1, ITS2, and ITS1-5.8S-ITS2） and a combined dataset （SSU rRNA＋ITSI-5.8S- ITS2） using different phylogenetic methods and with consideration of the secondary structure of the genes. Confidence in phylogenetic tree selection was assessed with the approximately unbiased test. The molecular results showed both that Zoothamnium is more likely to be polyphyletic, and morphologically similar genera Zoothamnopsis and Myoschiston were always nested among Zoothamnium species. Accordingly, as with some other groups of ciliates, to understand more fully the correct phylogeny of Zoothamnium there remains a need for additional data from both morphological and molecular studies, covering additional Zoothamnium spp. and members of closely related genera （e.g. Zoothamnopsis, Myoschiston, and Epistylis）.展开更多
基金The NSFC Open Cruise for the Eastern Indian Ocean during March–May 2014the National Natural Science Foundation of China under contract Nos 41876134,41676112,41276124 and 41406155+1 种基金the University Innovation Team Training Program for Tianjin under contract No.TD12-5003the Changjiang Scholar Program of Chinese Ministry of Education of China to Jun Sun
文摘Epipont peritrich ciliates are one of the most sessilie protists that attached to the substrate of zooplankton communities especially copepods and crustaceans. Peritrich ciliates can be solitary or colonial form found from the coastal zones and embayment around the world. Present research report is the first snapshot study of the peritrich ciliates and the horizontal distribution in open waters from surface to 200 m depth in the eastern Indian Ocean. Recently, five peritrich ciliates, e.g., Vorticella oceanica, Zootharnnium alternans, Z. alrasheidi, Z. pelagicum, and Z. marinum were collected from plankton net tow samples during the cruise from April 10 to May 13, 2014. The characteristics of the peritrich ciliate were determined according to the shape of the zooids, the ciliary structure and the stalks. The morphometric shape, sizes and characters also explained by examination under light/scanning electron microscopy. Vorticella oceanica and Z. pelagicum showed their association with host such as diatom （i.e, Chaetoceros coarctatus） and copepod （Oithona brevicornis） including some individuals around the dinoflagellate species （Ceraitum tripose）. The distribution of these sessilid ciliates was dominated by the V. oceanica, Z. pelagicum and Z. rnarinurn at the southeast zone while the large colonies of Z. alrasheidi observed at the Bay of Bengal. This distribution can be influenced by substrate availability like diatom （Ch. coarctatus） and copepods （O. brevicornis）.
文摘涉及近年来采集自青岛沿海的自由生聚缩虫属纤毛虫14种,包括9个国内新纪录:交替聚缩虫Zoothamnium alternans Claparède & Lachmann,1859,弗氏聚缩虫Z.foissneri Ji et al.,2005,黑凯聚缩虫Z.hiketes Precht,1935,海洋聚缩虫Z.marinum Mereschkowski,1879,霉聚缩虫Z.mocedo Entz,1884,倪氏聚缩虫Z.nii Ji et al.,2005,拟树状聚缩虫Z.pararbuscula Ji et al.,2005,王氏聚缩虫Z.wangi Ji et al.,2005,许氏聚缩虫Z.xuianum Sunetal.,2005;以及其他5个已知种:群栖聚缩虫Z.commune Kahl,1933,双缘聚缩虫Z.duplicatum Kahl,1933,巨大聚缩虫Z.maximum Song,1986,羽状聚缩虫Z.plumula Kahl,1933,中国聚缩虫Z.sinense Song,1991。对以上各种作了简要的综合性描述,并给出了种检索表。
基金Supported by the National Natural Science Foundation of China(Nos.31071898,31111120437)the Scientific Research Foundation for the Returned Overseas Chinese Scholars,State Education Ministry of China+1 种基金the Key Laboratory of Mariculture(KLM),Ministry of Education,Ocean University of China,the Research Group Project(No.RGP-VPP-083)the King Saud University Deanship of Scientific Research
文摘In this paper, we explore possible conflict between morphological and molecular interpretations of phylogenetic relationships within the well-known peritrichous genus Zoothamnium. On the basis of morphological evidence, for a long time this genus has been believed to be a well-defined monophyletic taxon. Nonetheless, Zoothamnium exhibits higher genetic diversity than the gross morphology of its species. Here, we used all available genetic information for the small subunit of ribosomal RNA （SSU rRNA） and internal transcribed spacer region （ITS1-5.8S-ITS2） for this genus to reconstruct phylogenies for four datasets （SSU rRNA, ITS1, ITS2, and ITS1-5.8S-ITS2） and a combined dataset （SSU rRNA＋ITSI-5.8S- ITS2） using different phylogenetic methods and with consideration of the secondary structure of the genes. Confidence in phylogenetic tree selection was assessed with the approximately unbiased test. The molecular results showed both that Zoothamnium is more likely to be polyphyletic, and morphologically similar genera Zoothamnopsis and Myoschiston were always nested among Zoothamnium species. Accordingly, as with some other groups of ciliates, to understand more fully the correct phylogeny of Zoothamnium there remains a need for additional data from both morphological and molecular studies, covering additional Zoothamnium spp. and members of closely related genera （e.g. Zoothamnopsis, Myoschiston, and Epistylis）.
