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湛江隐藻培养基的优化及其N、P和K含量与隐藻细胞颜色相关性的研究 总被引：1，自引：0，他引：1
报道从广东湛江沿海采集、分离的隐藻———湛江隐藻 (CryptomonaszhanjiangensisH .J.HuetL .P .Wu)的室内培养 ,从 5种培养基中筛选得到较适合于其生长的 85 - 1培养基。在此基础上 ,对培养基中的N、P、K含量在生长过程中的变化以及细胞中叶绿素和隐藻藻红蛋白的消长情况进行了研究。结果表明 ,湛江隐藻在培养过程中出现的由红褐色—黄褐色—橄榄绿色的细胞颜色变化主要是由细胞内隐藻藻红蛋白与叶绿素的比值决定的 ,并与培养基中N素水平的变化成正相关。此外 ,在色素的提取过程中 ,对同一材料的不同色素进行分步提取 ,方法简便 ,效果也较好 相似文献
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为统计大连海域红藻的物种多样性,在2016年5月至2021年5月进行标本采集时,发现了红叶藻科入侵海藻牛岛薄膜藻Haraldiophyllum udoense M.S.Kim et J.C.Kang,对其形态结构进行了详细的观察,并对rbc L基因序列进行了分析。结果表明:①藻体直立;呈暗红色或红褐色;高7~30 cm,宽6~25 cm;叶片状,薄膜质;藻体除基部和生殖结构外为单层细胞。②rbc L基因序列分析的结果显示本研究的6个样本间无碱基差异,与产自韩国的牛岛薄膜藻无碱基差异。牛岛薄膜藻是在我国海域首次发现的新纪录种,同时薄膜藻属Haraldiophyllum Zinova为我国新纪录属,认为船舶压舱水及海水流动是该种入侵的主要原因。本研究结果将丰富我国红叶藻科海藻的多样性,同时为外来海藻的入侵途径及对当地生态的影响提供新资料。 相似文献
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Taxonomy and ultrastructure of five species of Tetraselmis (Prasinophyceae) isolated from China seas
ＩＮＴＲＯＤＵＣＴＩＯＮＴｈｅｇｅｎｕｓＴｅｔｒａｓｅｌｍｉｓＳｔｅｉｎ ( 1 878)ｉｓａｇｒｅｅｎｆｌａｇｅｌｌａｔｅｓ (Ｐｒａｓｉｎｏｐｈｙｃｅａｅ)ｔｈａｔｃｏｎｓｉｓｔｓｏｆｍａｎｙｍａｒｉｎｅａｓｗｅｌｌａｓａｆｅｗｆｒｅｓｈｗａｔｅｒｓｐｅｃｉｅｓ .Ｍａｒｉｎｅｓｐｅｃｉｅｓｏｆｔｅｎｏｃｃｕｒｉｎｄｅｎｓｅｐｏｐｕｌａ ｔｉｏｎｓｃａｕｓｉｎｇｂｌｏｏｍｓｉｎｔｉｄｅｐｏｏｌｓｏｒｂａｙｓ ,ｔｈｅｒｅｂｙｂｅｉｎｇｉｍｐｏｒｔａｎｔｔｏａｎｕｎｄｅｒｓｔａｎｄｉｎｇｏｆｔｈｅｄｙｎａｍ… 相似文献
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胡维兴 《中国海洋大学学报(自然科学版)》1988,(4)
本文对分布在我国淡水池塘及水稻田中的16种介甲目甲壳动物(隶属于5科8属)进行了记述及部分种类的形态分类描述。有5种是作者近年来的新发现,其中的中华蚌壳虫Cyzicus sinensis sp nov系新种。列表比较了新种与其近似种尼泊尔蚌壳虫Cyzicus nepalensis Ueno,1967的主要形态区别特征。本文中附有亚目、科、属的检索表及形态特征图109幅。本文记述种的名录如下: 1、东北锐眼蚌虫Lynceus manchuricus Daday,1927 2、中国拟圆蚌虫Paracyclestheriasinensis Shen et Dai,1987 3、木场真渔乡蚌虫Eulimnada kobai Ueno,1940 4、涛雒真渔乡蚌虫E.raotuoensisl Hu,1986 5、东方原蚌虫Eocyzicus orientalis Daday,1915 6、蒙古原蚌虫E.mongolianus Ueno,1927 7、莱阳原蚌虫E.laiyangensis Hu,1985 8、中华蚌壳虫(新种)Cyzicus sinensis Hu,1988 sp.nov.9、窦氏隐妇蚌虫Caenestheria davidi(Simon,1886)10、川候隐妇蚌虫C.kawamurai(Ueno,1940) 11、瘦狭蚌虫Leptestheria tenuisSars,1901 12、川内狭蚌虫L.kawachiensis Ueno,1925 13、南京狭蚌虫L.nanjingensis Zhanget Chen,1976 14、新疆狭蚌虫L.xinjiangensis Hu,1987 15、中国原狭蚌虫Eoleptestheriachinensis Daday,1923 16、东平原狭蚌虫E.dongpingensis Hu, 相似文献
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The Dirichlet–Neumann operator for the water-wave problem was introduced and expanded by Craig and Sulem [Craig, W., Sulem, C., 1993. [CS] Numerical simulation of gravity waves. J. Comput. Phys. 108, 73–83] and in a slightly different form and for 3D waves by Bateman, Swan and Taylor [Bateman, W.J.D., Swan, C., Taylor, P.H., 2001. [BST] On the efficient numerical simulation of directionally spread surface water waves. J. Comput. Phys. 174, 277–305]. This approach is supposedly superior to techniques derived earlier by West et al. [West, B.J., Brueckner, K.A., Janda, R.S., Milder, D.M., Milton, R.L., 1987. [WW] A new numerical method for surface hydrodynamics. J. Geophys. Res. 92 (C11), 11803–11824] and Dommermuth and Yue [Dommermuth, D.G., Yue, D.K.P., 1987. [DY] A high-order spectral method for the study of nonlinear gravity waves. J. Fluid Mech. 184, 267–288] under seemingly more restrictive assumptions. This paper extracts the Dirichlet–Neumann operator expansions from West et al. and Dommermuth and Yue. Concerning the operator expansions alone it is found that Bateman et al. is identical to West et al. and Dommermuth and Yue while Craig and Sulem is slightly different due to minor differences in the operator definition. For application to the free-surface boundary conditions West et al. devised a consistent truncation at nonlinear order. This alters the equivalence of the different approaches when it comes to the evaluation of the temporal derivative of the free surface elevation, which is decisive for wave evolution. In this regard Craig and Sulem is found to be identical to West et al. while Bateman et al. is identical to Dommermuth and Yue. Pseudo code is provided for alternative computational schemes in Fourier-space and physical space, respectively, along with a discussion of efficiency and potential flexibility. 相似文献
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江苏淤泥质海岸海岸线分形机理研究 总被引：4，自引：0，他引：4
结合国内外分形研究进展,系统探讨了江苏淤泥质海岸海岸线的分形机理问题,指出;江苏海岸的形成受到了构造和河流泥沙淤积的双重作用,而海岸线的走向则受到了构造,河流淤积,滩面物质组成与沿海黄海沿岸流的共同作用;另外,江苏海岸线分维的变化与海岸的淤积和侵蚀有着必然的联系;再者,江苏海岸物质组成具有分形性质,这是江苏海岸线具有分形性质的物质基础。 相似文献
10.
中国海域一些水螅水母类种类名的订正 总被引：4，自引：0，他引：4
本文订正了中国海水螅水母类分类学名31种,其中有3种新组合,例如青岛双手水母,新改级;厦门枝刺水母,改隶新组合;胶州和平水母,改级新组合。并报道一种我国新纪录的柯氏侧丝水母。 相似文献
11.
描述了从广东湛江南三岛沿岸采集、分离的等鞭金藻1新种———湛江等鞭金藻,应用电镜技术观察了湛江等鞭金藻运动细胞的超微结构.电镜观察证明,其运动细胞表面覆盖2~4层鳞片,鳞片有两种类型,一种较大,椭圆形;另一种较小,圆形.细胞顶端具有2条等长的平滑的鞭毛,两鞭毛间具有一条退化的定鞭(haptonema),很短,仅有1~2条微管.湛江等鞭金藻鞭毛过渡区中央轴丝与周边微管之间有5~6条螺旋条纹.两个金褐色色素体位于细胞两侧.3条类囊体为一组,无带片层.每个质体内侧具1个单层膜包裹的裸露的蛋白核.蛋白核内常具1对横列的类囊体.高尔基器位于鞭毛基体基部.线粒体长管状,具多个不分枝或分枝的脊.细胞中下部具1个至多个金藻昆布糖(Chrysolaminaran)颗粒.细胞核位于两质体之间、细胞基部. 相似文献
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In this paper, a finite difference scheme with an efficient 2-D numerical wave absorber for solving the extended Boussinesq equations as derived by Nwogu (Nwogu, O., 1993. Alternative form of Boussinesq equations for nearshore wave propagation. J. Waterway, Port, Coastal and Ocean Engineering, ASCE 119, 618–638) is proposed. The alternate direction iterative method combined with an efficient predictor-corrector scheme are adopted for the numerical solution of the governing differential equations. To parameterize the contribution of unresolved small-scale motions, the philosophy of the large eddy simulation is applied on the horizontal plane. The proposed method is verified by two test cases where experimental data are available for comparison. The first case is wave diffraction around a semi-infinite breakwater studied by Briggs et al. (Briggs, M.J., Thompson, E.F., Vincent, C.L., 1995. Wave diffraction around breakwater. Journal of Waterway, Port, Coastal, and Ocean Engineering, ASCE 121, 23–35). The other case is wave concentration by a navigation channel as reported by Yu et al. (Yu, Y.-X., Liu, S.-X., Li, Y.S., Wai, O.W.H., 2000. Refraction and diffraction of random waves through breakwater. Ocean Engineering 27, 489–509). Numerical results agree very well with the corresponding experimental data in both cases. 相似文献
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《ICES Journal of Marine Science》2007,64(9):1845-1847
The Editors are pleased to take this opportunity to record theirgratitude to the following referees (reviewers) for their prompt,thoughtful, and constructive reports.
- Abella, A.
- Afonso, J. M.
- Agnalt, A-L.
- Agnew, D.
- Agostini,V.
- Aguzzi, J.
- Ahsan, N.
- Aksland, M.
- Allcock, A. L.
- Andersen,K. H.
- Anderson, C. I. H.
- Anderson, J. T.
- Anderson, K.
- Andrade, J. P.
- Andrews, A.
- Apostolaki, P.
- Appleyard,S. A.
- Aprahamian, M. W.
- Arkhipkin, A. I.
- Armstrong, M.J.
- Arneri, E.
- Arnott, S.
- Aro, E.
- Åström,M.
- Auster, P. J.
- Bailey, N.
- Balguerías, E.
- Balke,H.
- Bannister, R. C. A.
- Barange, M.
- Bathman, U.
- Beal,B.
- Bégout, 相似文献
- Afonso, J. M.
14.
We present a linear Boltzmann equation to model wave scattering in the Marginal Ice Zone (the region of ocean which consists of broken ice floes). The equation is derived by two methods, the first based on Meylan et al. [Meylan, M.H., Squire, V.A., Fox, C., 1997. Towards realism in modeling ocean wave behavior in marginal ice zones. J. Geophys. Res. 102 (C10), 22981–22991] and second based on Masson and LeBlond [Masson, D., LeBlond, P., 1989. Spectral evolution of wind-generated surface gravity waves in a dispersed ice field. J. Fluid Mech. 202, 111–136]. This linear Boltzmann equation, we believe, is more suitable than the equation presented in Masson and LeBlond [Masson, D., LeBlond, P., 1989. Spectral evolution of wind-generated surface gravity waves in a dispersed ice field. J. Fluid Mech. 202, 111–136] because of its simpler form, because it is a differential rather than difference equation and because it does not depend on any assumptions about the ice floe geometry. However, the linear Boltzmann equation presented here is equivalent to the equation in Masson and LeBlond [Masson, D., LeBlond, P., 1989. Spectral evolution of wind-generated surface gravity waves in a dispersed ice field. J. Fluid Mech. 202, 111–136] since it is derived from their equation. Furthermore, the linear Boltzmann equation is also derived independently using the argument in Meylan et al. [Meylan, M.H., Squire, V.A., Fox, C., 1997. Towards realism in modeling ocean wave behavior in marginal ice zones. J. Geophys. Res. 102 (C10), 22981–22991]. We also present details of how the scattering kernel in the linear Boltzmann equation is found from the scattering by an individual ice floe and show how the linear Boltzmann equation can be solved straightforwardly in certain cases. 相似文献
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本文继续报道我国西沙群岛海产色球藻目 Chroococcales 的十种蓝藻,隶于三科六属，有八种是我国海产蓝藻的新记录,它们是:铜锈微囊藻 Microcystis aeruginosa Kuetzing,小形色球藻 Chroococcus minor ( Kuetzing) Naegeli,湖沼色球藻盐泽变种 C. limneticus Lemm.var. subsalsus Lemm,易变色球藻 C.varius A.Braun,膜状色球藻C. membraninus ( Meneghini) Naegeli,圆胞束球藻 Gomphasphaeria aponina Kuetzing,附钙管鞘藻 Hormathonema epilithicum Ercegovic 和透明拟丝藻 Johannesbaptistia pellucida ( Dickie) Taylor at Drouet。其中透明拟丝藻形态特征独特,这对于蓝藻类的研究,特别是研究从色球藻目进化到丝状蓝藻类的系统演化具有重要价值,早已为藻类学家们所重视。该种也是我国海产蓝藻属的新记录。
迄今为止,藻类学家们一致认为色球藻目是蓝藻门 Cyanophyta 中最原始、最低级的类群,其植物体最简单,大都是单细胞或简单的群体,而且都十分微小,常被肥厚的胶质鞘所包埋,这就使该目蓝藻能适应复杂的自然环境。所以,在地质学和古生物学的研究中它已引起许多学者的注意。有关该目海产种类的分类研究,我国仅有少数报道,这方面的工作还有待深入。 相似文献
16.
张淑梅 《中国海洋大学学报(自然科学版)》2002,32(1):85-88
报道 6种产自大连沿海的蓝藻植物 ,分别为栖石隐杆藻 Aphanothece saxicola Naeg.、色合藻 Chroothece littorinae Tseng et Hua、附钙管鞘藻 H ormathonema ep ilithicum Ercegovic、短丝颤藻 Oscillatoria brevis Kuetzing、丰裕颤藻 Oscillatoria limosa(Dillw.) Ag.ex Gom.、中央席藻海生变种 Phormidium naveanum var.marina Tseng et Hua,它们均是大连沿海新记录。 相似文献
17.
A probabilistic methodology to estimate future coastal flood risk due to sea level rise 总被引：3，自引：0，他引：3
In this paper we present a methodology to estimate the probability of future coastal flooding given uncertainty over possible sea level rise. We take as an example the range of sea level rise magnitudes for 2100 contained in the IPCC Third Assessment Report [Church, J.A., Gregory, J.M., Huybrechts, P., Kuhn, M., Lambeck, K., Nhuan, M.T., Qin, D., Woodworth, P.L., Anisimov, O.A., Bryan, F.O., Cazenave, A., Dixon, K.W., Fitzharris, B.B., Flato, G.M., Ganopolski, A., Gornitz, V., Lowe, J.A., Noda, A., Oberhuber, J.M., O'Farrell, S.P., Ohmura, A., Oppenheimer, M., Peltier, W.R., Raper, S.C.B., Ritz, C., Russell, G.L., Schlosser, E., Shum, C.K., Stocker, T.F., Stouffer, R.J., van de Wal, R.S.W., Voss, R., Wiebe, E.C., Wild, M., Wingham, D.J. and Zwally, H.J., 2001. Changes in sea level. In Houghton, J.T. et al. (eds), Climate Change 2001: The Scientific Basis. Contribution of Working Group I to the Third Assessment Report of the Intergovernmental Panel on Climate Change. Cambridge University Press, Cambridge, United Kingdom, 881pp.] and infer a plausible probability distribution for this range. We then use a Monte Carlo procedure to sample from this distribution and use the resulting values as an additional boundary forcing for a two-dimensional model of coastal inundation used to simulate a 1 in 200 year extreme water level event. This yields an ensemble of simulations for an event of this magnitude occurring in 2100, where each member represents a different possible scenario of sea level rise by this time. We then develop a methodology to approximate the probability of flooding in each model grid cell over the ensemble and by combining these hazards maps with maps of land use values (consequence) we are able to estimate spatial contributions to flood risk that can aid planning and investment decisions. The method is then applied to a 32 km section of the UK coast in Somerset, South-West England and used to estimate the monetary losses and risk due a 1 in 200 year recurrence interval event under: (a) current conditions; (b) with the IPCC's most plausible value for sea level rise by 2100 (0.48 m) and (c) using the above methodology to fully account for uncertainty over possible sea level rise. The analysis shows that undertaking a risk assessment using the most plausible sea level rise value may significantly underestimate monetary losses as it fails to account for the impact of low probability, high consequence events. The developed method provides an objective basis for decisions regarding future defence spending and can be easily extended to consider other sources of uncertainty such as changing event frequency–magnitude distribution, changing storm surge conditions or model structural uncertainty, either singly or in combination as joint probabilities. 相似文献
18.
Wave interaction with a perforated wall breakwater with a submerged horizontal porous plate 总被引：1，自引：0，他引：1
This study examines the hydrodynamic performance of a new perforated-wall breakwater. The breakwater consists of a perforated front wall, a solid back wall and a submerged horizontal porous plate installed between them. The horizontal porous plate enhances the stability and wave-absorbing capacity of the structure. An analytical solution based on linear potential theory is developed for the interaction of water waves with the new proposed breakwater. According to the division of the structure, the whole fluid domain is divided into three sub-domains, and the velocity potential in each domain is obtained using the matched eigenfunction method. Then the reflection coefficient and the wave forces and moments on the perforated front wall and the submerged horizontal porous plate are calculated. The numerical results obtained for limiting cases are exactly the same as previous predictions for a perforated-wall breakwater with a submerged horizontal solid plate [Yip, T.L., Chwang, A.T., 2000. Perforated wall breakwater with internal horiontal plate. Journal of Engineering Mechanics ASCE 126 (5), 533–538] and a vertical wall with a submerged horizontal porous plate [Wu, J.H., Wan, Z.P., Fang, Y., 1998. Wave reflection by a vertical wall with a horizontal submerged porous plate. Ocean Engineering 25 (9), 767–779]. Numerical results show that with suitable geometric porosity of the front wall and horizontal plate, the reflection coefficient will be always rather small if the relative wave absorbing chamber width (distance between the front and back walls versus incident wavelength) exceeds a certain small value. In addition, the wave force and moment on the horizontal plate decrease significantly with the increase of the plate porosity. 相似文献
19.
通过形态结构观察结合rbcL和COI基因序列分析的方法,发现分布于海南省博鳌的台湾蜈蚣藻(Grateloupia taiwanensis S.M.Lin et H.Y.Liang)为海南新纪录种。结果表明:藻体直立,红色或紫红色,质地柔软黏滑,高6—18cm,宽2—3cm,叶片呈披针形,边缘长出的小育枝亦呈披针形,长5—25mm,宽1—5mm,固着器呈圆盘状;皮层由8—11层细胞构成,髓部非中空,髓丝纵走或相互交错;雌雄异体,精子囊由外皮层细胞形成,球形。果胞枝生殖枝丛主枝由6个细胞构成,辅助细胞生殖枝丛主枝由5个细胞构成(6cpb-5auxb型),均为典型的Grateloupia型。囊果散布于除固着器外的整个雌配子体的表面;四分孢子囊由四分孢子体的内皮层细胞产生,呈十字形分裂。rbcL基因序列分析结果显示4个采自海南的样本与产自台湾南部的台湾蜈蚣藻之间无碱基序列差异;COI基因序列分析结果显示4个样本间无碱基差异,在蜈蚣藻属这一大的进化支中聚集成独立的小分支,区别于其他种。 相似文献
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One new species and two new records of free-living marine nematodes from the Huanghai Sea 总被引：4，自引：3，他引：1
1 IntroductionIn January 2003, undisturbed sediments were tak-en from a grid of 22 sampling stations (from 32.5° to37°N, 122° to 125°E) during the cruise of an ecologi-cal survey of the over-winter ground for anchovy inthe Huanghai Sea. Meiofaunal abundance varied from55.3 to 152.0 ind/cm2 [(95.4 ±27.0) ind/cm2], with81% to 93% [(83.1 ±22.7) ind/cm2] of the specimensbeing nematodes. Up to now, twenty-nine species ofmarine nematodes have been recorded from theHuanghai Sea (Zhang and P… 相似文献