COMPARATIVE FATTY ACID COMPOSITION OF FOUR SARGASSUM SPECIES(FUCALES,PHAEOPHYTA)     

吴向春  陆保仁  曾呈奎 《中国海洋湖沼学报》1995,(4)

Fatty acid composition of four Sargassum species from Qingdao and Shidao,Shandong Provincewas investigated.16:0(palmitic acid)was the major saturated fatty acid.C_(18) and C_(20)were the mainpolyunsaturated fatty acids(PUFAs).Arachidonic acid and eicosapentaenoic acid predominated amongpolyenoic acids in all the algal species examined.except for Sargassum sp.which had low concentrationof eicosapentaenoic acid.  相似文献   

On two new species ofGardnerula (Cyanophyta) and the taxonomy of the genus     

C. K. Tseng  Hua Maosen 《中国海洋湖沼学报》1982,1(1):111-120

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ON A NEW SPECIES OF PAVLOVA (PRYMNESIOPHYCEAE) FROM CHINA     

曾呈奎  陈椒芬  张哲夫 《中国海洋湖沼学报》1992,(1)

Pavlova viridis sp. nov. is described on the basis of light and electron microscope observations. The material was collected from the coast of Haiyang county of Shandong, China. It is characterized by 1) yellowish green to green chloroplast, 2) rudimentary short flagellum 0. 3um long and hook-shaped, 3)long flagellum with small spherical knob-scales, 4) absence of pyrenoid and stigma, and 5) marine habitat. This new species and P . salina seem to be most closely related to each other but their colour, the insertion of their three appendages, the shape of their knob scales, and their cell periplasts are quite different from one another .  相似文献   

Late Cenozoic environmental change in southwestern Tibet: Evidence from stable isotopes     

WANG Yang  Sofia Khawaj  WANG Xiaoming  Benjamin Passey  ZHANG Chunfu  LI Qiang  Zhijie J. Tseng  Gary T. Takeuchi  DENG Tao  XIE Guangpu 《《地质学报》英文版》2013,87(Z1):875-875

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Application of GIS for the determination of hazard hotspots after direct transportation linkages between Taiwan and China     

Cheng-Wu Chen  Ching-Chung Lee  Chun-Pin Tseng  Chia-Hung Chen 《Natural Hazards》2013,66(2):191-228

A robust and reliable risk assessment procedure for the determination of transportation hazards between Taiwan and China needs to be developed. These hazards, which are related to mixed types of transport, including both air and maritime routes, play an important role in public security, and their effects need to be taken into consideration. After the implementation of direct cross-strait transportation, it has become necessary to master the spatial characteristics and distributions of maritime space policing cases and to plan effective control strategies in order to maintain public security. This study employs the Geographic Information System (GIS) technology to analyze the spatial locations of maritime cases that arose in the Taichung Harbor area from 2000 to 2010. The characteristics related to the spatial characteristics are surveyed, estimates are made utilizing the gathering and scattering model, hotspots are explored, and planned patrol and monitoring points drafted to provide assignment information for coastal patrol institutions.  相似文献   

An inter-hemispheric comparison of the tropical storm response to global warming     

Stephanie Gleixner  Noel Keenlyside  Kevin I. Hodges  Wan-Ling Tseng  Lennart Bengtsson 《Climate Dynamics》2014,42(7-8):2147-2157

Model studies do not agree on future changes in tropical cyclone (TC) activity on regional scales. We aim to shed further light on the distribution, frequency, intensity, and seasonality of TCs that society can expect at the end of the twenty-first century in the Southern hemisphere (SH). Therefore, we investigate TC changes simulated by the atmospheric model ECHAM5 with T213 (~60 km) horizontal resolution. We identify TCs in present-day (20C; 1969–1990) and future (21C; 2069–2100) time slice simulations, using a tracking algorithm based on vorticity at 850 hPa. In contrast to the Northern hemisphere (NH), where tropical storm numbers reduce by 6 %, there is a more dramatic 22 % reduction in the SH, mainly in the South Indian Ocean. While an increase of static stability in 21C may partly explain the reduction in tropical storm numbers, stabilization cannot alone explain the larger SH drop. Large-scale circulation changes associated with a weakening of the Tropical Walker Circulation are hypothesized to cause the strong decrease of cyclones in the South Indian Ocean. In contrast the decrease found over the South Pacific appears to be partly related to increased vertical wind shear, which is possibly associated with an enhanced meridional sea surface temperature gradient. We find the main difference between the hemispheres in changes of the tropical cyclones of intermediate strength with an increase in the NH and a decrease in the SH. In both hemispheres the frequency of the strongest storms increases and the frequency of the weakest storms decreases, although the increase in SH intense storms is marginal.  相似文献   

Natural disaster management mechanisms for probabilistic earthquake loss   总被引：7，自引：7，他引：0  

Chun-Pin Tseng  Cheng-Wu Chen 《Natural Hazards》2012,60(3):1055-1063

High rates of urbanization, environmental degradation, and industrial development have affected all nations worldwide, but in disaster-prone areas, the impact is even greater serving to increase the extent of damage from natural catastrophes. As a result of the global nature of environmental change, modern economies have had to adapt, and sustainability is an extremely important issue. Clearly, natural disasters will affect the competitiveness of an enterprise. This study focuses on natural disaster management in an area in which the direct risks are posed by the physical effects of natural disasters such as floods, droughts, tsunamis, and rising sea levels. On a local level, the potential impact of a disaster on a company and how much damage (loss) it causes to facilities and future business are of concern. Each company must make plans to mitigate predictable risk. Risk assessments must be completed in a timely manner. Disaster management is also very important to national policy. Natural disaster management mechanisms can include strategies for disaster prevention, early warning (prediction) systems, disaster mitigation, preparedness and response, and human resource development. Both governmental administration (public) and private organizations should participate in these programs. Participation of the local community is especially important for successful disaster mitigation, preparation for, and the implementations of such measures. Our focus in this study is a preliminary proposal for developing an efficient probabilistic approach to facilitate design optimization that involves probabilistic constraints.  相似文献   

On a new species ofCamptylonemopsis (Cyanophyta) from south China     

C. K. Tseng  Hua Maosen 《中国海洋湖沼学报》1983,1(3):361-366

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A landslide dam breach induced debris flow – a case study on downstream hazard areas delineation     

Chien-Yuan?ChenEmail author  Tien-Chien?Chen  Fan-Chieh?Yu  Fong-Yi?Hung 《Environmental Geology》2004,47(1):91-101

A catastrophic landslide dam breach induced debris flow initiated in Da-Cu-Keng stream, Ruifang town, when typhoon Xangsane hit Taiwan on November 1, 2000. Different available methodologies were used to model the natural dam breach induced debris flow and using field topography the hazard zones affected by debris mixtures were delineated. The numerical finite element or finite difference method is time consuming for the simulation of debris flow inundation areas and hence a rules-based GIS (Geographic Information System) analysis is proposed in this study. The model emphasizes the downstream inundated fan-shaped areas covered by debris mixtures through the overflow point. Topography and gradient are assumed to dominate the debris masses deposition mechanism in the GIS analysis. The approach considers the parameters effects, such as the runout distance, the debris masses magnitude and the inundated areas. The results of this study reveal that the GIS process using the rule-based approach speeds up the processing of delineating the hazard zones and assessment, which can be applied to early-warning and preliminary inundation hazardous mapping.  相似文献   

A Taxonomic Study of the Genus Tinocladia （Chordariales,Phaeophyta） in China Coasts I. Two new species, T. eudesmoides sp.nov, and T. zhangii sp.nov.     

Ding?LanpingEmail author  Lu?Baoren  Huang?Bingxin  C.?K.?Tseng 《中国海洋湖沼学报》2004,22(2):204-208

Two new species of the genusTinocladia Kylin (1940)T. eudesmoides Ding et Lu sp. nov. andTinocladia zhangii Ding et Lu sp. nov., are described.T. eudesmoides is mainly characterized by its longitudinally and transversely produced sub-cortical filaments from the medulla, its short uniseriate assimilating filaments, usually composed of 6–10 cells with slightly swollen and narrow ultimate cells, and its unilocular sporangia (60–115)×55–70μm, variable in size.T. zhangii is mainly characterized by its very solid frond, not rip apart by hands, its evident longer primary branches, its short and slender secondary branches, with very evident sub-cortical layer, and filaments divided repeatedly, and its large and small unilocular sporangia, with the latter borne on an evidently swollen pedicel. Project B80981816 supported by the NSFC. Contribution No. 4443 from the Institute of Oceanology, Chinese Academy of Sciences, Qingdao, China.  相似文献