Interrupting a multi-species bioinvasion vector: the efficacy of in-water cleaning for removing biofouling on obsolete vessels     

Davidson IC  McCann LD  Sytsma MD  Ruiz GM 《Marine pollution bulletin》2008,56(9):1538-1544

Vector management is the primary method for reducing and preventing nonindigenous species (NIS) invasions and their ecological and economic consequences. This study was the first to examine the efficacy of in-water scrubbing using a submersible cleaning and maintenance platform (SCAMP) to prevent invertebrate species transfers from a heavily fouled obsolete vessel. Initially, prior to treatment, 37 species were recorded in a biofouling matrix that reached 30cm depth in some locations. The bryozoan Conopeum chesapeakensis, and bivalves Mytilopsis leucophaeata and Ischadium recurvum, were dominant sessile species that created structure, supporting mobile biota that included crabs and the associated parasitic barnacle Loxothylacus panopae. Scrubbing had the effect of significantly reducing organism extent and the number of species per sample, but a substantial and diverse (30 species) residual fouling community remained across the entire vessel. Further assessments of management options are needed to prevent potentially damaging NIS transfers. Additional measures taken within an integrated vector management (IVM) strategy may further improve invasion prevention measures.  相似文献   

黄河三角洲海岸防护工程研究   总被引：2，自引：0，他引：2  

丁东  尹延鸿 《海洋地质前沿》2000,16(2):5-8

黄河三角洲海岸带的护岸工程,主要经历了３个发展阶段：１９８３年以前为初期护岸阶段,仅在局部地区护岸且基本为土堤护岸;１９８３－１９９２年,护岸工程大发展阶段,且进行了大范围石堤护岸;１９９２年以后至今,护岸工程的维护和持续发展阶段。随着护岸工程的不断修建,护岸工艺和技术有很大发展。  相似文献   

中国南部海区编图及其基本地学特征     

王忠蕾  张训华  温珍河  杨金玉  尹延鸿  邱燕  王乃东 《地球物理学进展》2014,(4)

新编中国南部海区及邻域1:100万地质地球物理系列图与"中国东部海区及邻域1:100万地质地球物理系列图"为一套系列成果,包括空间重力异常图、布格重力异常图、磁力异常图、沉积物分布图和区域构造图五种专题图件.这五种图件采用统一的地理底图,根据不同专题的技术要求,利用当代先进的编图方法和成图技术,综合已有资料、前人成果和近年实测数据编制而成.本文在充分阅读新编图件的基础上,对中国南部海区的地球物理场特征、沉积物分布规律、区域构造演化等基本地学特征进行了分析研究,加强了对南部海区地质、地球物理特征的认识.  相似文献   

Trace metal retention in mangrove ecosystems in Guanabara Bay,SE Brazil   总被引：1，自引：0，他引：1  

Machado W  Silva-Filho EV  Oliveira RR  Lacerda LD 《Marine pollution bulletin》2002,44(11):1277-1280

Along contrasting environmental conditions (e.g., degree of trace metal contamination and mangrove forest structural development), sediments of Laguncularia racemosa-dominated mangrove stands in Guanabara Bay (SE Brazil) presented a trend of trace metal accumulation in forms with low potential of remobilization and biotic uptake. Concurrently, a relatively low transfer of sediment-bound metals to L. racemosa leaves was observed, which may moderate the metal export from the forests via leaf litter transport and the metal availability to enter in food chains based on leaf consumption.  相似文献   

Persistent organochlorine residues in sediments from the Black Sea   总被引：6，自引：0，他引：6  

Fillmann G  Readman JW  Tolosa I  Bartocci J  Villeneuve JP  Cattini C  Mee LD 《Marine pollution bulletin》2002,44(2):122-133

The extent of contamination of the Black Sea by selected organochlorine compounds has been assessed through the analysis of surficial sediments taken from throughout the region. Concentrations of HCHs at sites influenced by the Danube delta are among the highest recorded on a global basis (up to 40 ng g(-1) dry wt). The ratio between the alpha- and gamma-isomers was relatively low indicating contamination through the use of lindane. Concentrations of DDTs (0.06-72 ng g(-1) dry wt) and PCBs (0.06-72 ng g(-1) dry wt) were not especially high in comparison to levels reported from throughout the world. The DDE/DDT ratio was, however, low indicating fresh inputs and hence current usage of DDT within the Black Sea region.  相似文献   

南加利福尼亚土壤年龄层序中成：土氢氧化铁成分和含量的变化     

Mcfa.  LD  刘菊如 《国外第四纪地质》1989,(1):31-46

  相似文献   

中国南部海区及其邻域区域构造图的编制方法及地质构造单元划分   总被引：1，自引：0，他引：1  

尹延鸿  温珍河  孙桂华  郭振轩  侯方辉  郭兴伟 《中国海洋大学学报(自然科学版)》2014,44(7):64-70

中国南部海区及邻域1∶1 000 000地质地球物理系列图已编制完成并将出版,区域构造图是其中的主要图件之一。本文主要介绍该专业图件的编图思路、方法、地质构造单元的划分原则和主要地质构造单元的特征。该图主要以板块构造理论为指导,采取了剥皮法(剥去第四系)编图方法,主要表达区域地质构造特征,包括构造单元划分、断裂构造、岩浆活动、盆地分布等特征,在海底和沉积盆地中,还用等值线表示出了新生界的厚度。基于现今大地构造格局将本区划分出六级地质构造单元:一级构造单元为板块(欧亚板块、菲律宾海板块),二级构造单元为构造域(东亚大陆构造域、东亚大陆边缘构造域),三级构造单元为地块或岛弧,四级构造单元为盆地、隆起区、隆褶带或海盆区,五级构造单元为隆起或坳陷,六级构造单元为凸起或凹陷。  相似文献   

天然的海上大花园——走进长山列岛国家地质公园          下载免费PDF全文

尹延鸿 《国土资源科普与文化》2015,(2):42-53

<正>长山列岛(又称长岛)国家地质公园是目前中国唯一的海岛国家地质公园。公园坐落在山东半岛和辽东半岛间的长岛,包括整个长岛县,由32个岛屿组成,横跨渤海海峡五分之三的海面,陆地面积55.96平方千米。海岛特有的海蚀海积地貌使长岛无岛不秀、无岛不奇,宛然一座天然的海上大花园,素有"海上仙境"之称。长岛国家地质公园的设立,对开展地学研究、发展长岛经济、促进旅游、开展科普教育、宣传地学知识等均具有重要意义。  相似文献