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.

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.     

ANALYSES OF RECENT GEOMORPHIC EVOLUTION OF GARGATHY INLET, EASTERN SHORE OF VIRGINIA, U. S. A.

Uargathy Inlet is a small natural tidal inlet in the northern region ol the Virginia Darner island chain. It is 100 m wide with a throat cross-sectional area of 384m2 and an average tidal prism of 6.47 x 106 m3. The inside drainage system is 7.8 km long and 2.2km wide. The main channels comprise 5.8% of the area, shallow lagoons 19.8%, and Spartina marshes 74.4% in 1970. Over the period 1851 - 1989 the inlet narrowed and migrated northward while maintaining a weakening downdrift offset. The nearby barrier island coastline's rapid retreat (average rate 4.78m /a, 138 years retreat 660 m) was accompanied by back barrier channel and lagoon filling and a decrease in intertidal water volume which was probably the main reason for the entrance narrowing. The northward migration of the inlet was related to the dredging of the Inside Passage (before 1949) and the breaching of southern Metompkin Island (since 1957) connected with the inlet system. This altered the interior tidal circulation and likely shifted nort     

New and interesting diatoms from the Shimen Wetwalls,Yunnan Province,China. II. The diatom genus Nupela Vyverman & Compère (Bacillariophyceae)

Journal of Oceanology and Limnology - We detailed the valve morphology of five new species of diatom genus Nupela from wetwall communities in Yunnan Province, China, with light and scanning...     

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.

1INTRODUCTIONThegenusTinocladiaKylinderivedfromthege nusEudesmeJ.Ag.,wasestablishedbyKylinin1 940 .Untilnow ,fivespecieshavebeenreported .Threespecies,T .crassa (Sur.)Kylin(byC .K .Tseng,1 983 ) ,T .gracilisDingetLuandT .mi crosporangiiDingetLu (byDingetal.,2 0 0 4)inthegenusTinocladiahadbeenreportedtodate.Inthecourseofourinvestigationonthespecimensofthege nusTinocladiacollectedfromtheYellowSeacoastsandkeptintheHerbariumoftheInstituteofOceanolo gy,ChineseAcademyofSciences,twomo…     

“数字中国”,百舸争流(上)

“数字中国”目前不再只是“热门话题”,而是真枪实弹地在启动、运作了。诸如“数字福建”建设规划的制订 ,建设全省公用信息平台 ,省政务信息网络工程和政务信息资源整合改造工程、组建福建省空间信息工程研究中心、制定省政务信息共享政策 ,同时启动“数字鼓楼”示范区。福建省是真抓实干 ,棋先一着 ,为“数字中国”领跑。另外 ,在全国国土资源信息化会议上 ,田凤山部长提出 ,以信息化带动国土资源工作的科学化和现代化。     

Taxonomic Studies on a New Marine Ciliate, Apocoleps magnus gen. nov., spec. nov. （Ciliophora, Colepidae）, Isolated from Qingdao, China

The morphology and infraciliature of a new marine colepid ciliate, Apocoleps magnus gen. nov., spec. nov., are described based on living observations and silver impregnations. The new genus Apocoleps is characterized by having 8 (vs. 6 in most other related genera) armour tiers, spines at both ends of the cell, 3 adoral organelles and plates with 4 reniform uni-windows. Apocoleps magnus spec. nov. is defined by the following features: body elongated and slightly curved, about 100–120μm× 35–45 μm in vivo; an...     

“数字中国”,百舸争流(下)

“数字地球”如今不仅是信息社会的热门话题 ,而且已成为只争朝夕的行动。目前 ,各省 (区 )都陆续开展“数字省 (区 )”的研制 ,下面是“数字中国”的若干省区的数字化工程建设态势。( 3)数字山西充分利用已有的基础和优势 ,实施数字山西战略 ,合理利用资源 ,加强环境保护 ,以信息化带动工业化 ,提升传统产业的现代化水平 ,促进经济结构调整 ,全面推动山西经济的跨越式发展。数字山西建设将由省政府来抓 ,构建数字山西的基本方针是“政府主导、统筹规划、阶段发展、统一标准、联合建设、资源共享”。     

把握“数字地球”战略,全面建设小康社会

1　“数字地球”新战略“数字地球”的观念 ,是美国原副总统戈尔( A.cole,1 999)提出的 ,引起了政治家和科学界的关注。中央军委江泽民主席在院士大会上号召青年科学家密切关注 ,中国科学院发起组织了第一届“数字地球”国际研讨会 ,发布了“北京宣言”,第二、三届分别在北美 ,欧洲举行 ,第四届 ( 2 0 0 5年 )将由日本举办。     

GENETIC VARIATION IN PARTHENOGENETIC ARTEMIA FROM THE SHANDONG PENINSULA, P.R.C.

Results are presented of a survey of isozyme frequencies in parthenogenetic Artimia from six salterns in the Shandong Peninsula, P.R.C. Three of the eleven enzymes we scored using polyacryamide gel electrophoresis proved to be useful for analysis of electromorph frequency variation. These enzymes are tetrazolium oxidase (TO), lactate dehydrogenase (LDH), and malate dehydrogenase (MDH). Each of these systems showed extensive isozyme variation both within and between salterns. In addition, we have examined the possibility that electromorph frequencies may vary as the result of natural selection for adaptation to specific salinity, or salinity-associated environmental conditions. An indication of clinal variation was found in two series of ponds differing in salinity, however more extensive data are needed before it is possible to conclude that these patterns are the result of natural selection. Finally, the use of isozyme analyses such as ours, for unraveling taxonomic problems in Anemia, is discussed.     

A NEW SPECIES OF CILIATES, HEMIOPHRYS POLYMICRONUCLEI SP. NOV. FROM DONGHU LAKE, HUBEI PROVINCE

A new species of ciliates Hemophrys polymicronuclei sp. nov. from Donghu Lake is described. It is characterized by its colorless to yellowish, soft, flat and spindle-shaped body with four micronuclei.The right side of the body is a little more convex than the left side, and more transparent at both anterior and posterior ends. Its slit-like cytostome accounts for 1/4 of the body length on the left side without any trichocyst. There are two rows of trichites near the right anterior end ,6 - 8 straight bristles on the pellicle opposite the cytostome, 23-25 rows of kinetides on the right side of the body, two ellipsoid macronuclei and many contractile vacuoles in the cytoplasm.     

Compensatory growth in hybrid tilapia (<Emphasis Type="Italic">Oreochromis mossambicus ×O. niloticus</Emphasis>) reared in seawater,following restricted feeding

Hybrid tilapia weighing 7.71 g were reared in seawater at 24.0–29.0°C for 8 weeks. The controls were fed to satiation twice a day throughout the experiment, whereas treatment groups were fed at 0.5%, 1.5% or 3.0% body weight per day for 4 weeks, and then to satiation for the remainder of the experiment. During the first 4-week period, there was a curvilinear relationship between growth rate and ration size. Fish fed 0.5% and 1.5% rations displayed compensatory growth response of 2 weeks duration during realimentation. The weight-adjusted growth rate of fish fed at 3% ration was not significantly different from that of the controls by the end of the experiment, when none of the treatment groups had caught up in body weight with the controls. Hyperphagia was observed for the first 2 weeks of realimenatation in fish previously fed at 3% ration, but persisted for the whole realimentation period in groups previously fed at 0.5% and 1.5% rations. None of the feed restricted groups showed improved digestibility, feed efficiency, or protein and energy retention efficiency. Supported by the State Key Laboratory of Freshwater Ecology and Biotechnology of China and Shanghai Fisheries University (Grant No. 200015).     

DISTRIBUTION OF DISSOLVED AND PARTICULATE TRACE METALS IN ANOXIC SEAWATER, SAANICH INLET, B . C. CANADA

This paper discusses the spatial and seasonal distribution character of dissolved and paniculate trace metals in the anoxic seawater of Saanich Inlet, B.C., Canada. The study showed that concentration of dissolved and paniculate trace metals in anoxic seawater is closely related to (1) the concentration of H2S and the depth of the O2-H2S interface, (2) the exchange of seawater in Saanich Inlet with outside seawater, (3) biotic action, and (4) the flushing event. The study was based in part on the ratio between trace metals and nutrients. There was a steep change in the concentration of dissolved trace metals at the O2-H2S interface. The concentration of dissolved trace metals in the H2S-controlled zone was dependent on the H2S there. The suspended matter in Saanich Inlet comes from the Hero Strait seawater, phytoplankton production and resuspension of flushed-up sediments. The concentration of particulate trace metals was rather low in Saanich Inlet and tended to increase with depth. The total concentra     

A NEW MARINE CILIATE, AMPHILEPTUS LITONOTIFORMIS NOV. SP. (PROTOZOA CILIOPHORA)

The morphology and infraciliature of a marine ciliate Anphi/eptus litonotiformis nov. sp. inhabiting a shrimp farming pond in Sheyang (Jiangsu Province) are described. According to the infraciliature, habitat . and other morphological characters, it can not be congeneric with any other species of the genus . The special features of A. litonotiformis are the Litonotus-like body shape and the arrangement of its extrusomes regularly located along the margin of the cytostome. The most important characters of some related Amphileptus-species from marine water are biometrically tabled and discussed.     

COMPARATIVE STUDIES ON THE LARVAL DEVELOPMENT OF THE PENAEID SHRIMPS,PENAEUS CHINENSIS,P.MERGUIENSIS AND P.PENICILLATUS

The morphology of larval and 1st postlarval stages of Penaeus penicillatus are described.Results from comparative studies on larval development of P.penicillatus,P.merguiensis and P.chinensis are as fol-lows: These three species could not be identified during their naupliar stages. In the 1st protozoea,the antennule L1/L2 value is 1.7—2.0 in P.merguiensis,but lessthan 1.7 in P.chinensis and P.penicillatus;in the 2nd protozoea,the supra-orbital spine in P.chinensis isnot bifurcated,while those of P.merguiensis and P.penicillatus are bifurcated;in the 3rd protozoea,thereis a minute(or no)dorso-median spine on the posterior margin of the 1st and 2nd abdominal somite in P.chinensis,but they are prominent in P.merguiensis and P.penicillatus.In the mysis and 1st postlarvalstages,P.chinensis differs from P.merguiensis and P.penicillatus in having 9(8 in the other 2 species)longsetae on the exopod of pereopods 1—3;additionally,one dorsal tooth appears on the rostrum of P.chinensis in the 2nd mysis and that o     

整合信息资源,强化国家安全信息保障体系——天地一体,军民联合,整合信息资源,应对“数字地球”战略的初步思考

1　“国家安全”的广义理解国家安全泛指国防安全和国家公共安全 :包括环境安全、生态安全与信息安全…… ,诸多方面突发事件的综合应变能力。涉及到区域导弹防御体系、生物秘密武器、病毒传染、生物入侵 ,以及地震、地质灾害、洪涝、干旱、沙尘暴与风暴潮…… ,和黑客干扰、文化入侵、信息干扰、电子对抗等。无论来自人为的还是自然的原因 ,其对人民生命、财产的危害都很大 ;其预警、防卫、救治的方式则是非常相似的。对区域经济社会可持续发展的影响也是非常深远的。     

PSO-GM(1,1,N,p,ξ)模型在变形预测中的应用

通过对传统GM(1,1)缺陷分析和改进的基于权的PGM(1,1)建模机理描述,顾及PGM(1,1)中背景值构造时取相同的参数不能充分降低模型的预测误差,对不同的时刻引入不同的参数来改进GM(1,1)背景值序列的计算公式,将这种背景值构造方法和灰元N引入GM(1,1)建立了新的白化方程。在建立的新的白化方程基础上,用龙格-库塔法以修正的初始值计算累加值的模拟序列。针对引入的参数较多问题,采用粒子群算法寻找满足相对误差均值最优的参数,从而建立了基于粒子群优化算法和加权灰色组合的PSO-GM模型。工程实例应用表明,新模型的拟合精度高,预测效果好,相对其他两种原有模型预测精度有明显提高。     

Seasonal variations of phosphorus species in the Tuohe River,China. Part Ⅰ. Sediments

Sediment cores were collected at an upstream site(Jintang) and a downstream site(Neijiang) in summer and winter in the Tuohe River, which is one of the five largest tributaries of the Changjiang(Yangtze) River in China. A sequential leaching procedure was applied to determine the concentrations of the different forms of solid phosphorus, including exchangeable phosphorus(Exc-P) as well as phosphorus associated with iron oxides(Fe-P), with aluminum oxides(Al-P), with apatite(Ca-P) and with the residual fraction(Res-P), as correlated with water content and total organic carbon. The seasonal variations and the vertical distributions of phosphorus species in sediments at both sampling sites demonstrated that: 1) total phosphorus(TP) in summer and winter were ranged between 1 313–2 330, 1 491–2 228 mg/kg in Jintang and 543–2 128, 603–1 175 mg/kg in Neijiang, respectively. It can predicated the pollution of TP in Jintang is serious than that in Neijiang both in summer and winter; 2) total inorganic phosphorus(TIP) was the dominant form of TP; 3) Ca-P was the main chemical forms of TIP in the sediments. Based on the profiles in sediments and bio-available phosphorus data, it revealed that bio-available phosphorus(BAP) represented only a minor portion(0.61%–3.59%) of TP, and the vertical distribution of soluble reactive phosphorus(SRP) in corresponding porewaters was more abundant in the upper layer of the sediment, which suggests that BAP may be converted to non-bioavailable phosphorus in deeper layer of the sediment of this dynamic system.     

CHLAMYDOMONAS SAJAO NOV. SP.(CHLOROPHYTA, VOLVOCALES)

A new species of Chlamydomonas, namely, C. sajao nov. sp. of the Volvocales, Chlorophyta was isolated from a duckweed growing near a ricefield in the vicinity of Guangzhou, China. This interesting unicellular green alga, similar to C. mexicana from Mexico, secretes quantities of extracellular mucilaginous polysaccharides, and may be employed in improving soil quality. The new species resembles C. waldenburgensis Moewus in most characteristics but differs in three important features.