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| 1 | 16S rRNA is a better choice than COI for DNA barcoding hydrozoans in the coastal waters of China显示文摘Identification of hydrozoan species is challenging, even for taxonomic experts, due to the scarcity of distinct morphological characters and phenotypic plasticity. DNA barcoding provides an efficient method for species identification, however, the choice between mitochondrial cytochrome c oxidase subunit I(COI) and large subunit ribosomal RNA gene(16S) as a standard barcode for hydrozoans is subject to debate. Herein, we directly compared the barcode potential of COI and 16S in hydrozoans using 339 sequences from 47 pelagic hydrozoan species. Analysis of Kimura 2-parameter genetic distances(K2P) documented the mean intraspecific/interspecific variation for COI and 16S to be 0.004/0.204 and 0.003/0.223, respectively. An obvious 'barcoding gap' was detected for all species in both markers and all individuals of a species clustered together in both the COI and 16S trees. These results suggested that the species within the studied taxa can be efficiently and accurately identified by COI and 16S. Furthermore, our results confirmed that 16S was a better phylogenetic marker for hydrozoans at the genus level, and in some cases at the family level. Considering the resolution and effectiveness for barcoding and phylogenetic analyses of Hydrozoa, we strongly recommend 16S as the standard barcode for hydrozoans. | ZHENG Lianming HE Jinru LIN Yuanshao CAO Wenqing ZHANG Wenjing | 2014 | Acta Oceanologica Sinica2014，33，4： | 7 |
| 2 | Composition and ecological distribution of ichthyoplankton in eastern Beibu Gulf显示文摘Surveys were conducted in four seasons in the eastern Beibu Gulf from July 2006 to November 2007,to determine the ichthyoplankton composition,abundance,as well as environmental factors impacted on their spatiotemporal distributions.The fish eggs and larvae were sorted from 303 zooplankton quantitative samples,in which at least 1 order,60 families,31 genera and 61 species of fish eggs and larvae were identified.The species number was highest in summer whereas lowest in winter.With the most abundant fish egg (the average density was 2.41 ind./m 3),spring was the main spawning season,while the greatest mean density of fish larva was 1.35 ind./m 3 in summer.In the whole year around,fish eggs had the trends to aggregate in the nearshore of Guangxi coast,fish larvae were more abundant in the northern water.Relationships between fish eggs and larvae abundance and environmental factors were analyzed by using the Yield-Density model.The spatiotemporal distribution of ichthyoplankton in eastern Beibu Gulf was closely related to the Chl a concentration,and the optimal temperature,salinity and Chl a were 19.4-21.7 C,31.8-33.1 and 1.5-4.8 mg/m 3,respectively.Additionally,the distribution of fish larvae could be effected by ocean currents in summer and autumn. | ZHOU Meiyu LIN Yuanshao YANG Shengyun CAO Wenqing ZHENG Lianming | 2011 | Acta Oceanologica Sinica2011，30，1： | 3 |
| 3 | Aequorea taiwanensis n. sp. (Hydrozoa,Leptomedusae) and mtCOI sequence analysis for the genus Aequorea显示文摘Aequorea taiwanensis,a new hydrozoan species from the Taiwan Strait was described using morphological and molecular characteristics.Both morphological and mitochondrial cytochrome oxidase subunit I(mtCOI) data supported A.taiwanensis n.sp.as a valid species.Sequence divergence and genetic distance of A.taiwanensis n.sp.,A.papillata and A.conica were analysed based on the mtCOI gene sequences.The mtCOI sequences from these three species of the genus Aequorea showed high variation frequency,with sequence divergences ranging from 9.10% to 11.9%,and pairwise genetic distances ranging from 0.097 to 0.130.MtCOI sequence analysis provided diagnostic molecular systematic characteristics for accurate identification and discrimination of the species of Aequorea or their populations,and will be used to resolve evolutionary relationships among them.It was suggested that 10%-20% pairwise mtCOI sequence differences indicated the species-level divergence among congeneric species in the Hydromedusae. | ZHENG Lianming LIN Yuanshao LI Shaojing CAO Wenqing XU Zhenzu HUANG Jiaqi | 2009 | Acta Oceanologica Sinica2009，28，1： | 2 |
| 4 | Spatial pattern of the planktonic ciliate community and itsrelationship with the environment in spring in the northernBeibu Gulf, South China Sea显示文摘 | WANG YIBO ZHANG WENJING LIN YUANSHAO 2013 | 2013 | Oceanological andHydrobiological Studies2013，42，4： | 1 |
| 5 | Spatial and seasonal variations of large tintinnid ciliatesin Shenhu Bay of China显示文摘 | WANG YIBO ZHANG WENGJING LIN YUANSHAO 2014 | 2014 | Oceanological and HydrobiologicalStudies2014，43，3： | 1 |
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