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Seasonal implications for taxonomic sufficiency to simplify M-AMBI methodology in the coastal area adjacent to a eutrophic estuary

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Acta Oceanologica Sinica 2023年第10期42卷 108-116页

作者： Chenman Yang hongjun song Yi Sun Pengfei Xie Yuan Liu hongjun Li State Environmental Protection Key Laboratory of Coastal Ecosystem National Marine Environmental Monitoring CenterDalian 116023China Observation and Research Station of Bohai Strait Eco-Corridor First Institute of OceanographyMinistry of Natural ResourcesQingdao 266061China

Taxonomic sufficiency(TS)refers to identifying taxa to a taxonomic level sufficient to detect community changes in stressed environments and may provide a cost-effective approach in routine monitoring ***,there is still limited information regarding the seasonal impact of applying TS and its implications for the ecological quality evaluation in the estuarine *** study investigated the relationship between the multivariate-AZTI’s Marine Biotic Index(M-AMBI)and environmental variables in three seasons(i.e.,spring,summer,and autumn)in the Liaohe River *** tested the reliability of TS for simplifying the M-AMBI *** results showed that family and genus level data could reproduce the spatial-temporal patterns of community structure at the species *** M-AMBI values showed a consistent spatial distribution pattern in all sampling seasons,with a decreasing trend with the increasing distance from the estuary *** genus and family level data performed nearly as well as species level in detecting the seasonal variations of pollutants(i.e.,nutrients and total organic content).The family level M-AMBI was feasible to discern stress in the Liaohe River Estuary because of the high aggregation ratios at different taxonomic levels in all sampling *** findings suggest that applying taxonomic sufficiency based on the M-AMBI provides an efficient approach for evaluating ecological quality in the Liaohe River Estuary.

关键词： M-AMBI ecological quality macrofauna taxonomic sufficiency eutrophication Liaohe River Estuary

Reprogram to pluripotency: a new logic and a chemical cocktail

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National Science Review 2014年第1期1卷 6-7页

作者： hongjun song Guo-li Ming Institute for Cell Engineering Departments of Neurology and Neuroscience Johns Hopkins University School of Medicine

Somatic cells rom animals and humans can be reprogrammed into pluripotent stem cells by pluripotency *** Deng and colleagues discovered that pluripotency can also be induced with exogenous lineage speciiers via balancing competing diferentiation *** a related study they achieved,for the irst time,restoration of pluripotency in adult somatic cells using a chemical cocktail alone.

关键词： GATA Reprogram to pluripotency a new logic and a chemical cocktail PSCs SOX

Loss of chromatin modulator Dpy30 compromises proliferation and differentiation of postnatal neural stem cells

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Journal of Molecular Cell Biology 2020年第1期12卷 2-3页

作者： Ting Zhao Yan Hong Guo-Li Ming hongjun song Department of Neuroscience and Mahoney Institute for Neurosciences Perelman School of MedicineUniversity of PennsylvaniaPhiladelphiaPA 19104USA

Epigenetic regulation via chromatin modulation plays pivotal roles in regulating neural stem cells(NSCs)both during embryonic development and in adult neurogenesis(Yao et al.,2016).One classic epigenetic mechanism is covalent post-translational modifications to histone proteins,including methylation,phosphorylation,acetylation,ubiquitination,and *** particular,methylation of histone H3 at K4 and K27 positions act antagonistically to maintain active and repressed gene expression states,*** it is established that gene expression regulated by H3K27 methylation is one of the major determinants of the capacity of NSCs for either self-renewal or lineage differentiation,little is known about the role of H3KA methylation in NSC regulation(Albert and Huttner,2018).

关键词： neural modulator maintain

Seasonal variability of the zooplankton community in the southwest of the Huanghai Sea (Yellow Sea) Cold Water Mass

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Acta Oceanologica Sinica 2012年第4期31卷 127-139页

作者： LIU Ping song hongjun WANG Xiao WANG Zongling PU Xinming ZHU Mingyuan The First Institute of Oceanography State Oceanic AdministrationQingdao 266061China Key Laboratory of Science and Engineering for Marine Ecological Environment State OceanicAdministrationQingdao 266061China

Samples were collected with a plankton net in the four seasonal cruises during 2006-2007 to study the seasonal variability of the zooplankton community in the southwest part of Huanghai Sea Cold Water Mass （HSCWM, Yellow Sea Cold Water Mass）. The spatial and temporal variations of zooplankton species composition, biomass, abundance and biodiversity were examined. A total of 122 zooplankton species and 30 pelagic larvae were identified in the four cruises. Calanus sinicus and Aidanosagitta crassa were the most dominant species, and Themisto gaudichaudi and Euphau- sia pacifica were widely distributed in the HSCWM area. The spatial patterns of non-gelatinous zooplankton （removing the high water content groups） were similar to those of the total zooplank- ton biomass in autumn, but different significantly in the other three seasons. The seasonal means of zooplankton biomass in spring and summer were much higher than that in autumn and win- ter. The total zooplankton abundance averaged 283.5 ind./m3 in spring （highest）, 192.5 ind./m3 in summer, 165.5 ind./m3 in autumn and 65.9 ind./m3 in winter （lowest）, and the non-gelatinous groups contributed the most total abundance. Correlation analysis suggests that the non-gelatinous zooplankton biomass and abundance had a significant positive correlation in the whole year, but the relationship was insignificant between the total zooplankton biomass and abundance in spring and summer. The diversity index HI of zooplankton community averaged 1.88 in this study, which was somewhat higher than historical results. Relatively low diversity in summer was related to the high dominance of Calanus sinicus, probably due to the strongest effect of the HSCWM in this season.

关键词： zooplankton Huanghai Sea Cold Water Mass (Yellow Sea Cold Water Mass) seasonalvariability community structure southern Huanghai Sea (Yellow Sea)

Application of reprogrammed patient cells to investigate the etiology of neurological and psychiatric disorders

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Frontiers in Biology 2012年第3期7卷 179-188页

作者： Kimberly M. CHRISTIAN hongjun song Guo-li MING Institute for Cell Engineering Johns Hopkins University School of Medicine Baltimore MD 21205 USA Department of Neurology Johns Hopkins University School of Medicine Baltimore MD 21205 USA The Solomon Snyder Department of Neuroscience Johns Hopkins University School of Medicine Baltimore MD 21205 USA

Cellular reprogramming allows for the de novo generation of human neurons and glial cells from patients with neurological and psychiatric disorders. Crucially, this technology preserves the genome of the donor individual and thus provides a unique opportunity for systematic investigation of genetic influences on neuronal pathophysiology. Although direct reprogramming of adult somatic cells to neurons is now possible, the majority of recent studies have used induced pluripotent stem cells （iPSCs） derived from patient fibroblasts to generate neural progenitors that can be differentiated to specific neural cell types. Investigations of monogenic diseases have established proof-of-principle for many aspects of cellular disease modeling, including targeted differentiation of neuronal populations and rescue of phenotypes in patient iPSC lines. Refinement of protocols to allow for efficient generation of iPSC lines from large patient cohorts may reveal common functional pathology and genetic interactions in diseases with a polygenic basis. We review several recent studies that illustrate the utility of iPSC-based cellular models of neurodevelopmental and neurodegenerative disorders to identify novel phenotypes and therapeutic approaches.

关键词： reprogramming iPSCs neurodevelopment neurodegeneration

WIDE SWATH FMCW SAR DATA PROCESSING IN SQUINT MODE

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Journal of Electronics(China) 2014年第1期31卷 16-23页

作者： Luo Yunhua song hongjun Robert Wang Xu Zheng Institute of Electronics Chinese Academy of Sciences

This paper concentrates on the data processing of Frequency Modulation Continuous Wave(FMCW),Synthetic Aperture Radar(SAR)in the case of wide swath and squint *** the mode,the Doppler centroid dramatically varies along slant range compared to conventional *** poses a challenge for system design and signal processing since a very large azimuth bandwidth would be *** the paper,we accommodate the Doppler centroid variations with range by an improved spectral-length extension method,where a bulk range shift and updated Doppler centroid variations are introduced to greatly reduce the azimuth aliasing with respective to the existing ***,an image formation approach that integrates wave number domain algorithm is presented to focus the raw data of FMCW SAR in the case of wide swath and squint *** target simulation experiment demonstrates the advantages of the presented method.

关键词： Frequency Modulation Continuous Wave(FMCW) Synthetic Aperture Radar(SAR) Doppler centroid Wave number domain algorithm

HIGH-RESOLUTION AUTOMOBILE FMCW SAR AND SIGNAL PROCESSING

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Journal of Electronics(China) 2013年第6期30卷 561-566页

作者： Luo Yunhua song hongjun Robert Wang Zheng Shichao University of Chinese Academy of Sciences Institute of Electronics Chinese Academy of Sciences

The paper presents a high-resolution automobile Frequency Modulation Continuous Wave Synthetic Aperture Radar(FMCW SAR) named MiniSAR and the procedure of its signal *** imaging geometry of automobile SAR is very different from that of airborne SAR,leading to a different data processing method for automobile ***,in the paper,we propose an image formation approach that can well handle the focusing issues of automobile *** effects of the strong reflected signal and the spatial-variant synthetic aperture length are *** processed results with automobile FMCW SAR read data validate the presented method.

关键词： Frequency Modulation Continuous Wave Synthetic Aperture Radar (FMCW SAR) Automobile Leakage cancellation

Phytoplankton pigment pattern in the subsurface chlorophyll maximum in the South Java coastal upwelling system, Indonesia

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Acta Oceanologica Sinica 2018年第12期37卷 97-106页

作者： GAO Chunlei FU Mingzhu song hongjun WANG Lei WEI Qinsheng SUN Ping LIU Lin ZHANG Xuelei First Institute of Oceanography Ministry of Natural Resources Qingdao 266061 China Laboratory of Marine Ecology and Environmental Science Pilot National Laboratory for Marine Science and Technology (Qingdao) Qingdao 266237 China Key Laboratory of Science and Engineering for Marine Ecological Environment Ministry of Natural Resources Qingdao 266061 China Third Institute of Oceanography Ministry of Natural Resources Xiamen 361005 China

Upwelling occurs on the coast of Java between June and October, forced by local alongshore winds associated with the southeasterly monsoon. This causes variations in phytoplankton community composition in the upwelling zone compared with the surrounding offshore area. Based on pigments analysis with subsequent calculations of group contributions to total chlorophyll a(Chl a) using CHEMTAX, we studied the distribution and composition of phytoplankton assemblages in the subsurface chlorophyll maximum along the south coast of Java and the influence of upwelling. Nineteen phytoplankton pigments were identified using high-performance liquid chromatography, and CHEMTAX analysis associated these to ten major phytoplankton groups. The phytoplankton community in the coastal area influenced by upwelling was characterized by high Chl a and fucoxanthin concentrations, indicating the dominance of diatoms. In contrast, in the offshore area, the Chl a and fucoxanthin concentrations declined to very low levels and the community was dominated by haptophytes represented by 19′-Hexanoyloxyfucoxanthin. Accordingly, microphytoplankton was found to be the major size class in the coastal area influenced by upwelling, while nanophytoplankton was most abundant in the offshore area. Low concentrations of other accessory pigments indicated less contribution from dinoflagellates,prasinophytes, chlorophytes and cryptophytes. Photo-pigment indices revealed that photosynthetic carotenoids(PSCs) were the largest component of the pigment pool, exceeding the proportion of Chl a, with the average PSCTP up to 0.62. These distribution trends can mainly be explained by phytoplankton adaption strategies to upwelling and subsurface conditions by changing species composition and adjusting the pigment pool.

关键词： Java upwelling phytoplankton pigment HPLC subsurface chlorophyll maximum CHEMTAX size structure

KEY TECHNOLOGY OF D-INSAR AT X-BAND FOR MONITORING LAND SUBSIDENCE IN MINING AREA AND ITS APPLICATION

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Journal of Electronics(China) 2014年第5期31卷 441-452页

作者： Li Xinglin Liu Donglie song hongjun Chen Runpu Li Hongyu University of Chinese Academy of Sciences Institute of Geodesy and Photogrammetry TU Braunschweig 38106 Germany Institute of Electronics Chinese Academy of Scences

In theory, land subsidence measurement results with high accuracy can be obtained by using the Differential Interferometry Synthetic Aperture Radar(D-InSAR) at X-band. In practice, however, the measuring accuracy of D-InSAR at X-band has been seriously affected by some factors, e.g., decorrelation and high deformation gradient. In this work, the monitoring capability of D-InSAR for coal-mining subsidence is evaluated by using SAR data acquired by TerrraSAR-X system. The SAR image registration method for low coherence image pairs, the denoising phase filter for high noise level interferogram and atmospheric effects mitigation method are the key technical aspects which directly influence the measurement results of D-InSAR at X-band. Thus, a robust image registration method, an improved phase filter method and an atmospheric effects mitigation method are proposed in this paper. The proposed image registration method successfully achieves InSAR coregistration, while the amplitude cross-correlation cannot properly coregister low coherence SAR image pairs. Moreover, the time complexity of the proposed image registration method is obviously slighter than that of the Singular Value Decomposition(SVD) method. The comparing experiment results and the unwrapping phase results show that the improved Goldstein filter is more effective than the original Goldstein filter in noise elimination. The atmospheric influence correction experiment results show that the land subsidence areas with atmospheric influence correction are more clarified than that of without atmospheric influence correction. In summary, the presented methods directly improved the measurement results of D-InSAR at X-band.

关键词： Differential Interferometry Synthetic subsidence monitoring Decorrelation Atmospheric Aperture Radar (D-InSAR) Mining area Land effects High deformation gradient