Morphogenetic studies on Uronychia uncinata(Protozoa, Ciliophora) during its asexual division

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海滩修复养护技术发展趋势与前景

海岸侵蚀是沿海各国面临的共同问题,海滩养护是当前砂质海岸保护的最佳手段,在全球范围内得到广泛应用。本文回顾了海滩养护技术的发展历程,总结了世界范围的海滩养护实践,分析各国海滩养护理念上存在的差异。以研究文献为基础,总结归纳了平面和横向剖面的补砂方式、辅助工程技术和海滩模型预测等方面的海滩养护技术研究进展,并在此基础上提出了海滩养护的未来发展趋势:①针对复杂海岸的海滩养护应用拓展;②基于沉积物管理的海滩养护修复;③从地貌系统到生态系统全面考虑的海滩养护技术;④全球砂源赤字条件下的海滩保护和修复思路。     

新时代国土空间规划中陆海统筹的重点内容和实现路径

新时代国土空间规划是未来可持续发展的空间蓝图。陆地与海洋作为国土空间的两大主体,落实陆海统筹战略、推进生态保护和高质量发展已成为沿海地区国土空间规划编制的重要内容。文章阐述陆海统筹的重点内容并分析其实现路径,研究结果有助于推动陆海统筹在国土空间规划中的有效落实,提升国土空间规划编制的科学性。研究结果表明在新时代背景下,可从6个方面实现陆海统筹:有机衔接陆海主体功能,统筹协调岸线两侧矛盾,统筹塑造陆海空间格局;统筹规划陆海自然资源的保护与开发;统筹布局和协调发展陆海产业;建立陆海一体的交通和防灾支撑体系;开展陆海协同的生态环境保护与修复治理;建设陆海统筹的管理体制机制。     

Seismic stratigraphy and subsidence analysis of the southern Brazilian margin (Campos,Santos and Pelotas basins)

The Campos, Santos and Pelotas basins have been investigated in terms of 2D seismo-stratigraphy and subsidence. The processes controlling accommodation space (e.g. eustacy, subsidence, sediment input) and the evolution of the three basins are discussed. Depositional seismic sequences in the syn-rift Barremian to the drift Holocene basin fill have been identified. In addition, the subsidence/uplift history has been numerically modeled including (i) sediment flux, (ii) sedimentary basin framework, (iii) relation to plate-tectonic reconfigurations, and (iv) mechanism of crustal extension. Although the initial rift development of the three basins is very similar, basin architecture, sedimentary infill and distribution differ considerably during the syn-rift sag to the drift basin stages. After widespread late Aptian–early Albian salt and carbonate deposition, shelf retrogradation dominated in the Campos Basin, whereas shelf progradation occurred in the Santos Basin. In the Tertiary, these basin fill styles were reversed: since the Paleogene, shelf progradation in the Campos Basin contrasts with overall retrogradation in the Santos Basin. In contrast, long-term Cretaceous–Paleogene shelf retrogradation and intense Neogene progradation characterize the Pelotas Basin. Its specific basin fill and architecture mainly resulted from the absence of salt deposition and deformation. These temporally and spatially varying successions were controlled by specific long-term subsidence/uplift trends. Onshore and offshore tectonism in the Campos and Santos basins affected the sediment flux history, distribution of the main depocenters and occurrence of hydrocarbon stratigraphic–structural traps. This is highlighted by the exhumation and erosion of the Serra do Mar, Serra da Mantiqueira and Ponta Grossa Arch in the hinterland, as well as salt tectonics in the offshore domain. The Pelotas Basin was less affected by changes in structural regimes until the Eocene, when the Andean orogeny caused uplift of the source areas. Flexural loading largely controlled its development and potential hydrocarbon traps are mainly stratigraphic.     

Sustainable development: Social outcomes of structural adjustments in a South Australian fishery

The assessment of sustainable development is a relatively recent advent in policy and the evaluation of industry structural adjustments. Although the elements of economic and environmental assessment have been relatively well developed and accepted, the effective inclusion of ‘social’ aspects in assessments of sustainable development are still being grappled with.     

海洋酸化对马氏珠母贝受精及早期发育的影响

自2010年7月1日至3日,在pH值为8.1、7.7和7.4条件下研究了海洋酸化对马氏珠母贝(Pinctada martensii Dunker)受精及早期发育的影响。结果显示,海洋酸化对不同pH值下马氏珠母贝的受精率无显著影响。pH8.1、pH 7.7和pH 7.4试验组幼虫的壳长、壳高的值逐渐增大,pH 8.1组幼虫的壳长、壳高的值大于同期其他两组的值,且在实验的第24、36、48小时与其他两组同期幼虫的壳长、壳高的值差异显著,这表明海洋酸化显著影响马氏珠母贝幼虫的生长。实验期间,pH 8.1试验组幼虫的存活率和畸形率没有显著变化,而pH 7.7和pH 7.4组幼虫的存活率显著低于pH 8.1组。pH 7.4组幼虫的畸形率显著高于同期pH 8.1和pH 7.7组幼虫的畸形率,表明在海洋酸化的环境中幼虫的发育受到影响。本文将为海洋酸化的相关研究提供基础数据。     

基于Matlab的TEQC在GPS数据预处理中的应用

利用Matlab二次开发编制teqcplot程序模块,实现质量检查结果的图形显示和可视化查询,将GPS观测数据中存在的电离层延迟和多路径效应的影响定量地表示出来,提高了数据处理的工作效率。并用实测数据进行验算,根据检查结果对GPS观测数据进行相应的处理,通过对比分析结果表明,经TEQC预处理后的观测数据,有效地提高了GPS基线解算的质量。     

犬齿牙鲆胚胎及仔、稚、幼鱼形态发育观察

犬齿牙鲆(Paralichthys dentatus)卵为端黄卵,受精卵浮性,卵径950~1100μm,油球径200~225μm.在水温20.5~22.0℃,盐度33条件下培育,受精后1 h 20 min 进入卵裂期,6 h 10 min 进入囊胚期,11 h 20 min 进入原肠胚期,19 h 10 min 发育到胚孔封闭期,胚体形成,26 h 50 min 尾芽出现,33 h 35 min心跳开始,48 h 10 min 开始孵化出仔鱼.初孵仔鱼平均全长2.59 mm±0.02 mm,在培育水温为17.0~21.0℃,盐度24~34条件下,胚后发育时序为:1日龄~9日龄为仔鱼前期,10日龄平均全长5.52 mm±0.05 mm,卵黄囊和油球完全吸收进入仔鱼后期;40日龄平均全长20.82 mm±0.67 mm,各鳍鳍条发育形成进入稚鱼期;65日龄平均全长41.13 mm±0.88 mm,全身鳞被完整进入幼鱼早期     

"政社分开"大背景下社会组织创新发展的思考与建议 ——以海洋社会组织为例

党的十九大以来,随着我国社会组织的不断发展和政府职能转变的逐步推进,社会组织面临着前所未有的机遇与挑战。文章以海洋社会组织为例,研究在"政社分开"过程中遇到的问题。研究表明,"政社分开"后,社会组织遇到的困难一是失去物质资源,难以正常开展活动;二是失去"主心骨",难以建立公信力;三是失去主要业务来源,发展内生动力不足。为新形势下社会组织如何更好地健康发展,提出了建立健全社会组织法律法规、加强对社会组织的扶持力度、拓展社会组织经费来源结构等对策建议。     

沿海城市经济-海洋生态环境-游艇旅游业耦合协调发展分析

借鉴物理学中的耦合理论,分析沿海城市经济系统、海洋生态环境系统与游艇旅游业系统三者间的耦合协调作用机理;构建耦合评价模型与指标体系,并基于改进的熵值法,对沿海16个游艇旅游发展重点城市三者的耦合度及耦合协调度进行实证研究;运用皮尔逊相关系数法探讨各因素间相互关系。结果表明:沿海城市经济、海洋生态环境和游艇旅游业发展水平的综合评价值并不高,可进一步分为城市经济滞后型、生态环境滞后型和游艇旅游业滞后型三种制约类型;区域内三大系统耦合度较高,但耦合协调度较低且存在明显的区域差异;系统内部各因素间相互关联。鉴于此,提出游艇城市应因地制宜,协调开发与保护关系,深化产业融合等建议,以促进三大系统较高层次的耦合协调发展。