4篇
您的检索式：作者名="Wenzheng Xiu"
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| 1 | First record of Ulva californica in the mainland of China:a single alien parthenogenetic population in discontinuous distribution显示文摘Molecular investigations have raised concerns about the ecological risks of green tides caused by alien Ulva species in new habitats.The green tide-forming species U.californica Wille was generally considered to be native to North America,but new records have been widely reported in Europe,Asia,and Oceania in recent decades,indicating a strong dispersal capacity of the species.In this study,the first record of U.californica on the coastline of China's Mainland was reported,following a combined identification with multi-molecular markers and morphological characterization.It was shown that this species has a discontinuous distribution pattern along the coast of China's Mainland,with northern populations in the Yellow Sea and southern populations in the East China Sea and South China Sea.According to results of examination for life cycles and identification with mating type(MT)genetic markers,it was indicated that all U.californica samples were male gametophytes,and reproduced themselves through parthenogenesis solely.Combined with the fact that southern and northern populations are highly genetically identical,here we believed that U.californica was a recent alien species to China's Mainland with a rapid local spread.This finding provided evidences that the ability to reproduce in a variety of ways may play an important role in the spread of Ulva species,as well as essential basic data for marine risk management of green tides in China.In addition,according to the phylogeographic analysis,the possible geographical origin and global dispersal routes of U.californica were also proposed. | Xiu WEI Wenzheng LIU Xuyin LIN Qianchun LIU Peng JIANG | 2022 | Journal of Oceanology and Limnology2022，40，6： | 1 |
| 2 | Prediction of segregation characterization based on granular velocity and concentration in rotating drum显示文摘In a binary granular system composed of two types of particles with different granule sizes and the same density,particle sorting occurs easily during the flow process.The segregation pattern structure is mainly affected by the granular velocity and granular concentration in the flow layer.This paper reports on the experimental velocity and concentration measurement results for spherical particles in a quasi-two-dimensional rotating drum.The relationship between the granular velocity along the depth direction of the flow layer and granular concentration was established to characterize structures with different degrees of segregation.The corresponding relationships between the granular velocity and concentration and the segregation pattern were further analyzed to improve the theoretical models of segregation(convection-diffusion model and continuous flow model)and provide a reference for granular segregation control in the production process. | Wenzheng Xiu Ra Li Quan Chen Qicheng Sun Vladimir Zivkovic Hui Yang | 2023 | Particuology2023，，2： | 0 |
| 3 | Translation and rotation of particles in different flow pattern areas of a silo显示文摘The present paper reports the results obtained for translational and rotational velocity profiles of spherical particles for the mixed flow in a conical silo.The discrete element method(DEM)based on Hertz-Mindlin(no slip)with RVD rolling friction contact model is used for simulations.Opposite correlations are found between translational and rotational velocities in different flow areas of the silo.In particular,the abrasion caused by rotation is dominant in the funnel flow area.In addition,increase of the mass flow rate of silo can effectively reduce the abrasion induced by rotation.This highlights that understanding of dynamic characteristics of particles is helpful for optimization of silos and reduction of granular material abrasion. | Ran Li Quan Chen Hongze Li Wenzheng Xiu Vladimir Zivkovic Hui Yang | 2023 | Particuology2023，，2： | 0 |
| 4 | Comparative chloroplast genomes of Ulva prolifera and U.linza(Ulvophyceae)provide genetic resources for the development of interspecific markers显示文摘The green seaweeds Ulva linza and U.prolifera are closely related species.They usually co-occur widely and have important ecological significance as primary producers thriving in the intertidal zone.In the Yellow Sea,a genetically unique floating ecotype of U.prolifera even bloomed to cause serious green tides.However,there is still a lack of appropriate molecular markers to distinguish these two species,partially due to limited evaluations on the intraspecific variations in U.prolifera among dif ferent ecotypes.Since organelle genomes could provide rich genetic resources for phylogenetic analysis and development of genetic markers,in this study,the chloroplast genome from one attached population of U.prolifera was completely sequenced,and comparative genomic analyses were performed with other existing chloroplast genomes from U.linza and the floating ecotype of U.prolifera.The results showed that in spite of the high level of collinearity among three genomes,there were plenty of genetic variations especially within the non-coding regions,including introns and gene spacer regions.A strategy was proposed that only those signals of variation,which were identical between two ecotypes of U.prolifera but divergent between U.linza and U.prolifera,were selected to develop the interspecific markers for U.linza and U.prolifera.Two candidate markers,psa B and pet B,were shown to be able to distinguish these two closely related species and were applicable to more attached populations of U.prolifera from a wide range of geographical sources.In addition to the interspecific marker,this study would also provide resources for the development of intraspecific markers for U.prolifera.These markers might contribute to the surveys for Ulva species composition and green tide monitoring especially in the Yellow Sea region. | Wenzheng LIU Qianchun LIU Jin ZHAO Xiu WEI Peng JIANG | 2022 | Journal of Oceanology and Limnology2022，40，6： | 0 |
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