山东半岛东部诸岛水域叶绿素—a含量和初级生产力   总被引：1，自引：0，他引：1  

柴心玉  高尚德 《海洋湖沼通报》1996,(3):39-48

据１９９０．１１－１９９１年８月期间，山东半岛东部诸岛水域调查资料，分析了该水域叶绿素－ａ含量的时空分布和初级生产力的分布与变化，此分布与该水域的温度和营养盐水含量密切相关。叶绿素－ａ含量的季节变化分三种类型，年变幅为０．１１－１２．８１ｍｇ／ｍ＾３，年平均值为１．１７ｍｇ／ｍ＾３。初级生产力夏季〉春季〉秋季〉冬季，年变幅为２３．００－７９１．６０ｍｇ．ｃ／ｍ＾２．ｄ年平均为１５２．０ｍｇ．ｃ／ｍ  相似文献   

柴达木盆地新构造运动主要特征与成因机制   总被引：10，自引：0，他引：10  

杨明慧 《海洋地质与第四纪地质》1997,17(3):71-78

研究表明，在壳幔结构、地球物理背景、沉积物结构、多层关地幔和构造样式等方面，达木盆地与中国东部新生代裂谷类伸展盆地具有可比性，应该归属 展性盆 。盆地伸展和收缩作用相间进行，伸展起因于地幔底辟；而收缩受两人因素影响；（１）盆地伸展作用受相邻造山带反作用诱导的挤压应力；（２）板块碰撞传递的远程板内应力。在此基础邮新的构造期达木盆地演化的“双层模式”，即地幔上隆－地壳伸展；被动挤压＋板内应力－地壳收缩  相似文献   

Spatial Variation in the Structure of Kelp Forest Communities Along a Wave Exposure Gradient     

Christopher  Harrold  James  Watanabe Susan  Lisin 《Marine Ecology》1988,9(2):131-156

Abstract. Four sites were sampled in kelp (Macrocysiis pyrifera) forests occupying rocky bottom habitats along a wave exposure gradient in central California. Consistent betwecn-site differences were found in the three major structural elements - the surface canopy, the undcrstory assemblage, and the ground cover/turf assemblage - of kelp forest communities. Macrocysiis pyrifera was found at all four sites. Nereucyslis tuelkeana only at the most exposed site. The understory kelps Laminaria setchellii and Pterygopltora californica were also characteristic of exposed sites. Articulated coralline algae were more abundant at exposed sites than protected, while fleshy red algae showed the opposite pattern. All four study sites were located along 8.5 km of coastline, and thus were assumed to have available to them the same species pool for colonization. The substrate composition was the same and the amount of unconsolidated substrate was similar at all four sites. We suggest that exposure to wave-generated water motion, through its influence on the surface canopy and therefore on the amount of light reaching the bottom, is responsible for these between-site differences.  相似文献   

Application of the first internal transcribed spacer(ITS-1) of ribosomal DNA as a molecular marker to population analysis in farrer''s scallop Chlamys farreri     

YU Ziniu  WEI Xiaohu  KONG Xiaoyu  YU Shanshan 《海洋学报(英文版)》2007,26(1):93-100

Sequence variation of the first internal transcribed spacer of ribosomal DNA （ ITS - 1 ） was examined and its application to the study of genetic variation was explored in four populations of farter＇ s scallop Chlamys farreri. ITS - 1 fragments, with a length of about 300 bp,of 78 individuals collected from Dalian, Qingdao, Yantai in China and Korea respectively were amplified via PCR, cloned and sequenced. Intra-genomic variation was examined by sequencing several clones of single individuals. Alignment and polymorphism analysis detected 44 haplotypes and 50 polymorphic sites which consist of 30 substitutions and 20 indels, indicating a high level of polymorphisms. Sequence analysis also showed a very low level of intra-individual variation. All these features validated the feasibility of application of ITS - 1 fragment to population analysis. Polymorphism analysis showed that the Korea sample has the richest genetic variation, followed by Yantai and Qingdao samples. AMOVA （analysis of molecular variance） showed that the majority （96.26%） of genetic variation was distributed within populations and 3.74% resulted from among populations, but with P 〈 0.05 （ = 0.042）, indicating that the populations in this study have significant divergence. This output was basically concordant with the result arising from RAPD data and different from that from mitochondrial 16S rDNA sequence data. Discussion on this inconsistency was made accordingly.  相似文献   

渤海湾天津近岸海域水环境空间变异分析   总被引：6，自引：0，他引：6       下载免费PDF全文

朱琳  聂红涛  陶建华 《海洋学报》2007,29(6):134-140

由于海岸带的地理条件和海洋动力特性的复杂性以及人类开发活动对海岸带的影响,近岸海域的生态环境系统在空间分布上有很大的变异性.基于现场实测资料,建立系统的空间变异分析模型,对海岸带生态环境空间变化规律进行分析,可以充分了解不同区域的污染特征和变化趋势.应用所构建的空间变异分析模型对渤海湾天津近岸海域的水环境特性进行分析,结合对应年份的入海流量及其变化,分析了天津渤海湾海岸带污染的主因子和区域水环境的分布特征,结果可以对海洋功能区的划分和水环境综合评价结果进行验证和补充.  相似文献   

MM5数值预报产品在舟山海域风力分区预报中的释用   总被引：1，自引：0，他引：1  

黄辉  陈淑琴 《海洋预报》2006,23(2):67-71

本文阐述了舟山海域地理气候特征及开展舟山海域风力分区预报的重要性,详细介绍了利用海岛测风站资料研究的MM5数值预报产品在舟山海域风力分区预报中的释用技术,实践证明该释用技术能为风力分区预报提供重要的技术支撑,并为研究同类数值预报产品释用技术提供重要的参考依据。  相似文献   

我国海啸灾害及预警现状与建议   总被引：8，自引：1，他引：8  

叶琳  于福江  吴玮 《海洋预报》2005,22(Z1):147-157

本文给出了海啸定义及其它有关概念与术语,简要给出了我国及全球的海啸灾害.全面介绍了我国海啸监测能力、预警现状、研究成果以及有关国际合作的情况,重点介绍了我国自主研制的海啸数值模式,利用该模式我们模拟了2004年12月26日发生在印度洋大海啸以及假想的发生在我国南海的海啸对周边国家的影响.对海啸预警中存在的问题及未来急需开展的工作,作者也将一一给予阐述.  相似文献   

山东省近50年海洋气象灾害特征分析   总被引：3，自引：0，他引：3  

刘敦训 《海洋预报》2006,23(1):59-64

本文通过大量的文献和资料查阅,系统的统计分析了近50a山东省沿海及责任海区海雾、风暴潮、风暴海浪、海冰等几种主要海洋气象灾害的海洋、气象及分布特征和灾害情况,进一步分析了它们的变化规律和产生原因,为海洋气象业务、服务、科研提供有益的参考。  相似文献   

Applying an alternative method of echo-integration     

Aksland  Magnar 《ICES Journal of Marine Science》2006,63(8):1438-1452

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Time changes in fishing power in the Danish cod fisheries of the Baltic Sea     

Marchal  Paul; Nielsen  J. Rasmus; Hovgard  Holger; Lassen  Hans 《ICES Journal of Marine Science》2001,58(1):298-310

  相似文献