Survey abundance indices in a tropical estuarine lagoon and their management implications: a spatially-explicit approach   总被引：2，自引：1，他引：2  

Rueda  Mario; Defeo  Omar 《ICES Journal of Marine Science》2001,58(6):1219-1231

  相似文献   

荷兰海洋区测的有益经验与启示     

姜玉池  赵洪伟 《海洋地质前沿》2002,18(8):34-38

总结了荷兰海洋区测的有益经验，提出了我国开展海洋区测工作应考虑的问题，即根据国家及社会的需求尽快开展不同比例尺的海洋区测工作；尽快组织有关专家修改目前试行的海洋区域地质调查规范；数据库的开发和建设应与海洋区测工作同步；应制定相应的法律法规，实现资料和资源的共享，规范海岸带的合理开发和保护。  相似文献   

皱纹盘鲍杂交F₁代与亲本的RAPD标记及分离方式分析   总被引：8，自引：0，他引：8  

肖洁  刘晓  张国范  郭希明 《海洋学报》2004,26(6):124-132

应用RAPD标记技术对皱纹盘鲍杂交家系JC的双亲及3个F₁个体进行了分析,对JC家系在皱纹盘鲍遗传连锁图谱构建中的应用前景进行了初步评估,并分析了RAPD分子标记在JC家系F₁代中的分离方式及该家系的1对亲本及其子代个体的遗传结构.7条随机引物共扩增出41个分子标记,其中24个为多态性,占总数的58.5%;有14个分离标记可用于遗传连锁作图,有7个符合孟德尔独立分配定律,占总数的17.1%.2个标记与子代个体大小有一定的相关性,但其连锁关系仍有待于进一步研究.父母本之间的遗传距离为0.384 4,父本与子代间的距离为0.137 2,母本与子代间的距离为0.127 3;父本提供的分离标记在子代中的显性频率为0.47,母本为0.55.双亲之间的遗传距离较远,杂交产生的JC-F₁群体具有较高的杂合度(0.201 6),该结果初步表明皱纹盘鲍杂交家系JC的子1代即可作为作图群体应用于皱纹盘鲍的连锁图谱构建.  相似文献   

A Continuous Mapping of Tidal Current Structures in the Kanmon Strait   总被引：1，自引：0，他引：1  

Keisuke?Yamaguchi  Ju?Lin  Arata?KanekoEmail author  Tokuo?Yayamoto  Noriaki?Gohda  Hong-Quang?Nguyen  Hong?Zheng 《Journal of Oceanography》2005,61(2):283-294

Tidal current structures at the Hayatomono-Seto of the Kanmon Strait are mapped continuously during March 17 to 20, 2003, including a spring tide, by the eight coastal acoustic tomography (CAT) systems distributed on both the sides of the strait. Detailed structures of strong tidal currents and their associated vortices are well reconstructed by the inverse analysis of travel-time difference data obtained from the reciprocal sound transmission between the paired CAT systems located at both sides of the strait mainly. The results are well compared to the shipboard acoustic Doppler current profiler (ADCP) data at the correlation rate of 0.84/0.82 and the RMS difference of 0.47/0.48 ms⁻¹ for the east-west/north-south current after the selection of good data. During the observation period, the maximum hourly mean volume transport for the upper 7 m layer across the strait reached 13,314 m³ s⁻¹ for the eastward and 5,547 m³ s⁻¹ for the westward. The daily mean transport is directed to the eastward and estimated 1,470 m³ s⁻¹ and 2,140 m³ s⁻¹ for March 18 and 19, respectively, when a spring tide occurs.  相似文献   

加拿大海洋-海岸带地质调查与"海底资源填图计划"     

刘健  何起祥 《海洋地质前沿》2003,19(1):26-28

简要介绍了加拿大海洋－海岸带地质调查的推动力和基本经验，以及即将启动的“海底资源填图计划”（SeaMap)。加拿大海洋－海岸带地质调查强调多波束测深技术的应用、多学科的协作和数据库建设，SeaMap将对整个加拿大专署经济区进行综合填图。  相似文献   

Use of openly available occurrence data to generate biodiversity maps within the South African EEZ     

D Yemane  SP Kirkman  T Samaai 《African Journal of Marine Science》2020,42(1):109-121

Biodiversity maps are an important component of ecosystem-based management and conservation. In the past, biodiversity maps were largely generated using patchy occurrence data from a range of data sources. Currently, substantial species occurrence data are readily available for large parts of the world and are accessible programmatically. Considering both the observed and expected changes in species distributions, and hence biodiversity, in response to present and future climate change, it is important to utilise readily available species occurrence databases to generate temporal and spatial biodiversity maps. In this study biodiversity maps were generated for three generic functional groups within the exclusive economic zone of South Africa: zooplankton, fishes and benthos. This was achieved by stacking individual species-distribution maps. Freely available occurrence data from the Ocean Biogeographic Information System (OBIS) were accessed for this purpose. Ensemble species-distribution modelling, employing five widely used statistical methods, was used to generate species-distribution maps for each functional group. The resulting spatial patterns of biodiversity for the three functional groups were largely in agreement with known patterns. The results of this study highlight the value of open-source occurrence and environmental data to generate biodiversity maps that can potentially be used in future spatial prioritisation or planning for management of marine areas and in environmental-change studies.  相似文献   

荷兰海洋区测的组织与管理     

杨金玉  张家强  吴能友 《海洋地质前沿》2002,18(8):5-9

全面介绍了荷兰地调局的组织设置与荷兰海洋区测工作的管理，分别就区测项目的设计、区测工作的组织与实施、区测工作的质量控制以及区测成果的表达和用户管理等几个方面进行了阐述，总结了荷兰区测工作组织与管理的基本经验。  相似文献   

Pb Isotope Mapping in the Tongbai-Dabie Orogenic Belt, Central China   总被引：1，自引：0，他引：1  

ZHANG Li  ZHONG Zengqiu  WANG Linsen  ZHANG Benren 《《地质学报》英文版》2008,82(1):126-133

Tongbai-Dabie orogenic belt in Central China is a part of the collisional belt between the Yangtze and North China cratons. It represents one of the most extensive ultrahigh-pressure （UHP） and high-pressure （HP） metamorphic rocks in the world. The Pb isotope mapping in this area is a significant method to constrain the crustal structure and tectonic evolution and to identify the tectonic boundaries within the vertical tectonic stack. Based on the Pb isotope compositions of the Dabie complex （DBC）, the Tongbai complex （TBC）, UHP and HP metamorphic rocks and associated foliated granites, the lower metamorphosed rocks from North Huaiyang （NHY） tectonic belt, and Cretaceous granites in the Tongbai-Dabie orogenic belt, we determined the Pb isotope geochemical map of the Tongbai-Dabie orogenic belt. The Pb isotope map shows that the Pb isotope compositions are similar within each geological body or lithotectonic unit, but the Pb isotope compositions of different lithotectonic units show systematic variations in the Tongbai-Dabie orogenic belt. The NHY tectonic belt contrasts strongly with the Tongbai-Dabie UHP.HP metamorphic belt in Pb isotope compositions. It is suggested that the line along the Xiaotian-Mozitan fault, the north limit of the Tongbai-Dabie UHP and HP metamorphic rocks, represents an important tectonic boundary. Within the Tongbai-Dabie HP -UHP metamorphic belt, to the south of Xiaotian-Mozitan fault, the vertical variations of Pb isotope compositions in different lithotectonic units and the spatial relationship among different major lithotectonic units have been constrained.  相似文献   

Geochemical Mapping—Evolution of Its Aims, Ideas and Technology   总被引：1，自引：1，他引：0  

XIE Xuejing 《《地质学报》英文版》2008,82(5):927-937

The development of geochemical mapping progressed from local geochemical prospecting through regional geochemical exploration and regional geochemical mapping to national and global geochemical mapping. This paper discusses the evolution of aims, ideas and methodology of geochemical mapping in Western countries, Russia and China. The sophistication of geochemical mapping methodology will make great contributions to solving resources and environmental problems in the 21^st century.  相似文献   

Geochemical Mapping——Evolution of Its Aims, Ideas and Technology   总被引：1，自引：1，他引：0  

XIE Xuejing 《《地质学报》英文版》2008,82(5)

The development of geochemical mapping progressed from local geochemical prospecting through regional geochemical exploration and regional geochemical mapping to national and global geochemical mapping. This paper discusses the evolution of aims, ideas and methodology of geochemical mapping in Western countries, Russia and China. The sophistication of geochemical mapping methodology will make great contributions to solving resources and environmental problems in the 21st century.  相似文献