The Effect of the Introduction of the American Species Marenzelleria viridis (Polychaeta; Spionidae) on the Benthic Ecosystem of Vistula Lagoon   总被引：1，自引：0，他引：1  

Ludwik  &#;mudzi&#;ski 《Marine Ecology》1996,17(1-3):221-226

Abstract. In the late 1980s, a radical change in the macrozoobenthos composition occurred in the Vistula Lagoon, an oligohaline and silted water basin. This structural change is a result of the mass appearance of the very strongly euryhaline spionid polychaete Marenzelleria viridis Verrill, a newcomer from North American estuaries. It considerably reduced the previous bottom macrofauna, which was composed mainly of Chironornidae larvae and oligochaetes.
The penetration depth of the macrozoobenthos into the sediments and its total biomass increased in the last years, which enhanced the organic matter displacement in sediment layers of a greater thickness. The previous bottom dwellers inhabited mainly the most superficial sediment layer, whereas the new polychaete immigrant can penetrate down to a depth of 20–40 cm.  相似文献   

东部沿海滩涂和浅海资源大开发之我见     

杜渺 《海岸工程》2000,19(3):39-45

介绍了浙江东南沿海的台州市及所属玉环县、温州市及所属乐清市、瓯海区等地面实施海洋“蓝色工程”的丰富实践和新鲜经验。文中借鉴浙东南沿海大开发的成功经验,结合我国东部沿海其它地区特别是苏北沿海的实际,提出了做出滩涂开发利用、发展海洋经济的总体战略构想。  相似文献   

软土海岸地区测量控制点标志的设立     

苏衍坤  李新国  朱绪伟  苏衍国 《海洋测绘》2007,27(3):43-47

分析了软土、湿地、滩涂地区特殊地理环境对测量控制点的影响;主要探讨了此类地区控制点标志的设计、施工。借助于建筑桩基技术和道桥施工方法,首次成功实现了某三角洲湿地滩涂地区统一布网。几年来,结合滩涂湿地测量、海岸防护和滩涂开发工程对部分控制点进行了初步检测,给出了部分检测数据。应用和检测均表明:桩基标石可较好地解决软土、湿地、滩涂地区控制点布设难题,显著提高软土海岸地区测量控制点标志的稳固性,从而延长控制网的可使用期。  相似文献   

A GIS-based step-wise procedure for assessing physical exposure in fragmented archipelagos     

Jan Ekebom  Pasi Laihonen  Tapio Suominen 《Estuarine, Coastal and Shelf Science》2003,57(5-6):887-898

Wind and waves are major forces affecting the geomorphology and biota in coastal areas. We present a generally applicable method for measuring and calculating fetch length, fetch direction and wave exposure. Fetch length and direction, measured by geographic information system-based methods, are used along with wind direction and wind speed data to estimate wave height and period by applying forecasting curves. The apparent power of waves approaching the shore, used as a proxy for wave exposure, is then calculated by a linear wave model. We demonstrate our method by calculating fetch lengths and wave exposure indices for five areas with varying exposure levels and types of meteorological conditions in the Finnish Archipelago Sea, situated in the northern Baltic Sea. This method is a rapid and accurate means of estimating exposure, and is especially applicable in areas with geomorphologically varying and complicated shorelines. We expect that our method will be useful in several fields, such as basic biogeographical and biodiversity research, as well as coastal land-use planning and management.  相似文献   

Coastal geomorphic evolution at the Denglou Cape, the Leizhou Peninsula     

Wang Lirong  Zhao Huanting  Song Chaojing  Yuan Jiayi  Yu Hongbing 《海洋学报(英文版)》2002,21(4):597-611

ＩＮＴＲＯＤＵＣＴＩＯＮＴｈｅＤｅｎｇｌｏｕＣａｐｅ ,ｉｎｔｈｅｓｏｕｔｈｗｅｓｔｏｆｔｈｅＬｅｉｚｈｏｕＰｅｎｉｎｓｕｌａ ,ｉｓａｔｔｈｅｎｏｒｔｈｍａｒｇｉｎｏｆｔｒｏｐｉｃａｌｚｏｎｅ .ＳｅｖｅｒａｌｒｅｓｅａｒｃｈｅｓａｎｄｃａｒｔｏｇｒａｐｈｉｅｓｏｆｔｈｅｒｅｇｉｏｎａｌｇｅｏｍｏｒｐｈｏｌｏｇｙａｎｄＱｕａｔｅｒ ｎａｒｙｇｅｏｌｏｇｙ ,ｗｈｉｃｈｗｅｒｅｃａｒｒｉｅｄｏｕｔｉｎｔｈｅｐａｓｔ,ａｌｌｉｎｃｌｕｄｅｔｈｉｓａｒｅａ (ＭＧＬ ,ＳＣＳＩＯ ,ＣＡＳ ,1 978;ＧＰＣＳＧＲＣＺＴ…  相似文献   

厄尔尼诺现象和浙江近海鲐鲹鱼渔获量变化关系──长江口ENSO渔场学问题之二   总被引：12，自引：0，他引：12  

洪华生  何发祥  杨圣云 《海洋湖沼通报》1997,(4)

本文研究浙江近海1970年到1992年鲐鱼渔获量变化与Elnino现象的关系，结合捕捞强度，长江中下游汛期（4—9月）降水量距平年际变化综合分析，探讨浙江近海鲐鱼渔获量变动规律，为合理开发渔业资源提供科学依据。  相似文献   

种植盐地碱蓬修复滨海盐渍土效果的研究   总被引：25，自引：0，他引：25  

林学政  沈继红  刘克斋  黄晓航 《海洋科学进展》2005,23(1):65-69

利用盐生植物——盐地碱蓬进行天津河口滨海盐碱地的生物修复。通过比较种植盐地碱蓬土壤和对照土壤的电导率、有机质和微生物数量的差异等研究了其修复效果。结果表明，种植区碱蓬根际土壤的电导率与对照土壤相比下降了13％；有机质和总氮与对照土壤相比分别增加43％和18％；根际土壤的微生物数量明显增加，放线菌和真菌分别比对照增加了5倍和16倍。根际微生物优势种群的盐耐受性结果显示，部分根际土壤的优势种群的盐耐受性明显下降，耐盐性较低的微生物种群已成为优势种群。以上结果表明，种植盐地碱蓬对改善滨海盐碱地的生态有明显的效果。  相似文献   

Carbon cycling through the pelagic foodweb in the northern Humboldt Current off Chile (23{degrees}S)     

Gonzalez  H.E.; Giesecke  R.; Vargas  C.A.; Pavez  M.; Iriarte  J.; Santibanez  P.; Castro  L.; Escribano  R.; Pages  F. 《ICES Journal of Marine Science》2004,61(4):572-584

  相似文献   

洋浦近岸海域污染控制规划方案优化——Ⅰ.排污口位置优选     

孙英兰  孙长青  赵可胜  王学昌  张阁卿 《中国海洋大学学报(自然科学版)》1994,(Z1)

在洋浦近岸海域计算潮流场基础上,计算预选排污口附近海水质点运动轨迹及预测污染物浓度分布,最后,从环保角度出发,推荐了洋浦地区各开发区的排污口位置,为洋浦近岸海域污染控制规划方案的制定及其优化提供了依据。  相似文献   

山东沿海旅游业可持续发展对策研究   总被引：4，自引：1，他引：4  

盛红  董玉明 《海岸工程》2001,20(4):63-68

滨海旅游是旅游活动的重要组成部分 ,在我国具有广阔的发展潜力。在讨论了山东沿海旅游业发展中存在的问题的基础上 ,指出发展滨海旅游与滨海和海洋环境之间的相关关系 ,探讨了使山东沿海旅游业可持续发展的主要对策  相似文献