青岛董家口港邻近海域春秋季浮游动物群落结构特征          下载免费PDF全文

张亮  陶卉卉  纪莹璐  宿凯  王尽文  蒲思潮 《应用海洋学学报》2023,42(1):16-27

以2020年11月(秋季)和2021年3月(春季)在青岛董家口港邻近海域进行的浮游动物调查数据为基础,分析了该海域浮游动物的群落结构特征。研究海域春、秋两季总共发现浮游动物33种成体,11类浮游幼虫,其中春季调查发现18种成体,5类浮游幼虫,秋季发现24种成体,9类浮游幼虫;春、秋两季调查浮游动物平均个体密度分别为129.4、69.4 ind/m³;平均生物量(湿重)为1 166.5、23.8 mg/m³;平均种类多样性指数(H′)为1.38、2.61;丰度(d)为0.95、1.77;均匀度(J)为0.90、0.67;春季调查优势种为八斑芮氏水母(Rathkea octopunctata)、中华哲水蚤(Calanus sinicus)、腹针胸刺水蚤(Centropages abdominalis)、强壮滨箭虫(Aidanosagitta crassa),秋季调查优势种为五角水母(Muggiaea atlantica)、双生水母(Diphyes chamissonis)、拟长腹剑水蚤(Oithona similis)、小拟哲水蚤(Paracal...  相似文献   

流动空间视角下的港口城市综合发展质量评价          下载免费PDF全文

董梦如  刘书舟  秦娅风 《海洋开发与管理》2023,40(3):65-73

文章基于流动空间视角,从“动态”和“静态”两个维度出发,对沿海47个港口城市综合发展质量的特征和类型进行了探究,并提出对策建议。结果表明：(1)各港口城市综合发展质量形成了相对合理的梯度分布特征,但核心港口城市的带动作用和各港口城市间的合作互助能力有待提升;(2)将中国港口城市综合发展质量分为极高、较高、一般、较低4种类型,较低类型港口城市数量远高于极高和较高类型数量,中国港口城市综合发展质量仍不乐观;(3)从不同港口城市群内部来看,环渤海、长三角和珠三角港口城市群分别表现为集中型、完备型和均质型;(4)影响港口城市综合发展质量的关键要素依次为技术流、资金流、物流和集装箱吞吐量。  相似文献   

A policy making framework for resilient port infrastructure systems     

Mo Mansouri  Roshanak NilchianiAli Mostashari 《Marine Policy》2010

This research is an effort to develop a Risk Management-based Decision Analysis (RMDA) framework based on the common fundamental elements that define the nature of resilience in Port Infrastructure Systems (PIS). While developing a systematic process for making strategic and investment decisions, RMDA guides the decision-makers to identify, analyze, and prioritize risks involved in PIS operations; to define ways for risk mitigation, plan for contingencies, and devise mechanisms for continuously monitoring and controlling risk factors and threats to the system; and to value the adopted resilience investment plans and strategies. Our suggested RMDA framework is a policy making tool that utilizes a Decision Tree Analysis (DTA) methodology for assessing the cost-effectiveness of the devised strategies.  相似文献   

Survivorship characteristics and adaptive mechanisms of phytoplankton assemblages in ballast water     

WU Huixian  SHEN Chen  WANG Qiong  Richard B. ARONSON  CHEN Chen  XUE Junzeng 《海洋湖沼学报（英文）》2019,(2):580-588

Phytoplankton diversity and abundance were determined in ballast water from 26 vessels in the Shanghai Yangshan Deep-Water Port from April 2015 to January 2016. In total, 84 species of phytoplankton were identified, belonging to 43 genera and 5 phyla. Bacillariophyta (75.0%, including 30 genera and 63 species) were the dominant algae in the ballast water. Their density ranged from (5.55±9.62) SD to (1.878±0.872)×10 3 cells/L, with a mean of 410.1 cells/L. Nine potentially harmful phytoplankton taxa were detected: Ceratium furca , Ce . marcroceros , Leptocylindrus danicus , Coscinodiscus radiatus , Co . granii , Prorocentrum micans , Melosira sulcata , Meuniera membranacea and Skeletonema costatum . Our survey and identification results showed that Microcystis aeruginosa , Ankistrodesmus falcatus and Scenedesmus survived in the high-salinity ballast water, even though they are freshwater species. We identified the common features of surviving phytoplankton and impacts on the phytoplankton assemblage of ballast water age and source. Our goal was to understand the adaptative mechanisms of phytoplankton in ballast water, providing statistical and theoretical support for future ballast water research and suggesting a scientific basis of ballast water management and inspection of vessels entering the port.  相似文献   

海南自由贸易港建设的空间生产逻辑     

张晖  郭庆宾 《地理科学进展》2022,41(5):880-895

建设海南自由贸易港是党中央在新时代深化改革、扩大开放的一项战略举措。论文基于列斐伏尔的空间三元辩证法,结合海南自由贸易港建设的主要内容及其空间生产的特征,构建“资本—权力—战略”三维逻辑框架,以解析海南自由贸易港建设的空间生产逻辑：从资本逻辑看,海南自由贸易港具有资本空间化与空间资本化特征,在流动空间的作用下,其资本三级循环过程有利于推动海南自由贸易港建设国际旅游消费中心和开放型经济新高地;从权力逻辑看,海南自由贸易港构建了制度空间,能形成对政府权力的规训,推动海南建设全面深化改革开放试验区、国家生态文明试验区;从战略逻辑看,海南自由贸易港是新时代背景下“新国家空间”的一种形态,表征了国家重大战略服务保障基地、南海海洋命运共同体、全球治理中国方案等战略意义。论文运用空间生产框架从理论层面分析海南自由贸易港的地理学逻辑,能增进人们对中国改革开放实践的理解,对进一步深化改革和扩大开放具有参考价值。  相似文献   

Low-cost port competitiveness index: Implementation in the Spanish port system     

José I. Castillo-Manzano  Mercedes Castro-Nuño  Fernando González Laxe  Lourdes López-Valpuesta  M. Teresa Arévalo-Quijada 《Marine Policy》2009

Spanish Port Authorities currently face a wide range of complexities in their decision-making processes, as they have to satisfy several port management objectives that may conflict with one another. This paper examines these circumstances by using decision theory methodology with multiple objectives, which, through the Promethee method, makes the design of an index possible. This index combines different decision factors that shape the competitiveness of a port to rank the Spanish Port Authorities. This ranking serves as an alternative to the traditional ranking system by easily providing more information about port traffic.  相似文献   

古镇口港海域水质状况调查及其评价     

范燕  张晓理  饶小师  胡昱 《海岸工程》2003,22(1):48-54

根据1998—2002年对古镇口港海域5期的监测结果，初步探讨了该海域环境因子的变化特征和营养水平。结果表明：该海域水质较好，除油类和CODMn外，1998年达到GB 3097—1997第一类海水水质标准，1999年水质超过第四类标准，2000，2001年水质达到第三类标准，2002年达到第二类标准。其中无机氮和活性磷酸盐含量近年略有上升，氮磷比平均为26．8。富营养化指数平均为37．2，并呈迅速下降态势，已从1999年的137降为2002年的0．733。但该水域受油类和CODMn污染较严重，CODMn的含量从1999年开始连续3年超过第四类海水水质标准，2002年明显好转，达到第一类海水水质标准；油类的含量连续5a达到第三类海水水质标准。综合来看，古镇口港海域水质目前状况较好。  相似文献   

葫芦岛港柳条沟港区规划潮流泥沙数模研究     

李孟国  李文丹 《海岸工程》2008,27(3):1-8

建立了基于不规则三角形网格的考虑波浪作用的潮流泥沙数学模型,在对模型进行充分验证的基础上,对葫芦岛海域的潮流、泥沙场的进行了数值模拟,对该海区的潮流扬、泥沙场特征进行了分析;对萌芦岛港柳条沟港区规划方案进行了潮流、泥沙场模拟研究。详细分析了工程前后港池和航道的流扬变化,计算了航道的横流,预报了规划港区港池和航道的泥沙年淤积量,为港区的规划设计提供了科学依据。  相似文献   

江苏洋口港区雷电特性及风险区划   总被引：2，自引：1，他引：1  

冯民学  焦雪  钟颖颖  于波  苗甫生 《气象科学》2012,32(1):86-93

利用洋口港区所在的江苏如东县地面观测站1959—2009年的雷暴日资料和洋口港区2006年1月—2009年12月的闪电定位数据,对港区雷电活动的时空分布特点和变化特征进行统计分析,揭示了洋口港区雷电发生的规律:闪电集中在6—8月份,港区陆地的闪电密度高于水域,而海上的闪电强度高于陆地。并通过计算气象指标、地物环境指标、承灾体的风险指标和建筑物的防护指标,对洋口港区人工岛进行雷击风险计算和雷击风险区等级划分,得出人工岛干散货及杂货作业区为高风险区,液体散货罐区和LNG接收站区域为中等风险区,公共设施区为低风险区,整个人工岛的雷击风险综合等级为中等。  相似文献   

Vessel traffic patterns in the Port of Kaohsiung and the management implications for preventing the introduction of non-indigenous aquatic species     

Liu TK  Tsai TK 《Marine pollution bulletin》2011,62(3):602-608

Data on shipping traffic in one of the busiest seaports in the world, the Port of Kaohsiung, were analyzed to evaluate the implications for ballast water management. Results show that 67% of the arriving vessels were registered to a flag of convenience, which typically have a lower degree of environmental records. The top five donor countries historically suffer from harmful algal bloom problems. The short journey and busy trading between these countries and Taiwan lead to a higher risk of inoculation. In addition, only 1.4% of all vessels visited more than once every year during the 9-year span, indicating that the port authority encounters many new vessels each year. These findings could influence the design and application of ballast water management strategies as well as highlight the challenges in their implementation. We suggest that an analysis of vessel traffic patterns should be coupled with other useful vessel information to make risk assessment successful.  相似文献