Nutrient budgets for European seas: a measure of the effectiveness of nutrient reduction policies   总被引：3，自引：0，他引：3  

Artioli Y  Friedrich J  Gilbert AJ  McQuatters-Gollop A  Mee LD  Vermaat JE  Wulff F  Humborg C  Palmeri L  Pollehne F 《Marine pollution bulletin》2008,56(9):1609-1617

Socio-economic development in Europe has exerted increasing pressure on the marine environment. Eutrophication, caused by nutrient enrichment, is evident in regions of all European seas. Its severity varies but has, in places, adversely impacted socio-economic activities. This paper aims to evaluate the effectiveness of recently adopted policies to reduce anthropogenic nutrient inputs to European seas. Nitrogen and phosphorus budgets were constructed for three different periods (prior to severe eutrophication, during severe eutrophication and contemporary) to capture changes in the relative importance of different nutrient sources in four European seas suffering from eutrophication (Baltic Proper, coastal North Sea, Northern Adriatic and North-Western Black Sea Shelf). Policy success is evident for point sources, notably for P in the Baltic and North Seas, but reduction of diffuse sources has been more problematic.  相似文献   

Types and distribution patterns of modern tidal channels along the Huanghe River Delta coast     

尹延鸿  王玉荣  刘宪启 《中国海洋湖沼学报》1999,17(4):379-384

INTRODUCTIONTidalchannelsareimportantgeomorphologicunitsalongsiltcoasts.Theyhaveanevidentfunc tionfortidalflatbecausetheyareassociatedwithitsrapidbayheadwarderosionandlateralswing ing.Thetidalchannelsdevelopalongthecoastandplayanimportantroleinseaandlandinterac tion .Manyscientistsresearchedthetidalchannels (Bayliss Smith ,1 978;Shao ,1 988;Zhang ,1 995) .TheScientificandTechnicalCommitteeofShandongProvince (1 991 )investigatedthecoastoftheHuanghe (Yellow)RiverDeltaandresearchedtheti…  相似文献   

影响黄河三角洲海岸带冲淤速率的因素   总被引：6，自引：0，他引：6  

尹延鸿  刘宪启 《海洋地质前沿》2000,16(4):1-4

影响黄河三角洲海岸带冲淤速率的主要因素是黄河的输沙量和海洋动力。此外 ,海平面相对升降、地形地貌特征、地质特征、植被情况、人类活动等因素也有明显影响  相似文献   

曹妃甸浅滩潮道保护意义及曹妃甸新老填海规划对比分析   总被引：1，自引：0，他引：1  

尹延鸿 《现代地质》2009,23(2)

曹妃甸填海工程是全国第一大填海工程,拟填海造陆310 km2,建设曹妃甸工业区。曹妃甸海区有曹妃甸外缘深槽和老龙沟深槽两大港口潜力区,建设曹妃甸工业区,使其充分发挥优良港口的作用是合理的。但填海面积过大,填挖土石方严重不平衡,尤其是通岛公路的建设阻断了曹妃甸浅滩潮道是曹妃甸老填海规划的主要缺陷。曹妃甸浅滩潮道是浅滩区的重要潮流通道,对维护老龙沟深槽港口潜力区和区域海洋环境有重要作用,不应被阻断而应当保留畅通。海洋专家们的呼吁对曹妃甸填海规划的修改起了重要作用。近来出台的曹妃甸新填海规划做了重大修改:准备再开通浅滩潮道,恢复北东东向的浅滩潮流系统;要在老龙沟附近修建一个大港池,使老龙沟深槽港口潜力区得到保护和利用;填挖土石方平衡有了明显改善;增加了岸线;减轻了对海洋环境的影响。但仍然存在某些需要进一步完善和推敲之处。津塘—曹妃甸地区是中国两大地面沉降区之一,应做好防止地面沉降、海洋灾害及地震灾害等隐患的准备。填海面积不宜过大,少填多察,多做海洋环境检测。填海要在海洋环境容量能够承受的情况下循序渐进地进行。  相似文献   

Marine-derived filamentous fungi and their potential application for polycyclic aromatic hydrocarbon bioremediation     

Passarini MR  Rodrigues MV  da Silva M  Sette LD 《Marine pollution bulletin》2011,62(2):364-370

Eight marine-derived fungi that were previously selected for their abilities to decolorize RBBR dye were subjected to pyrene and benzo[a]pyrene degradation. The fungus Aspergillus sclerotiorum CBMAI 849 showed the best performance with regard to pyrene (99.7%) and benzo[a]pyrene (76.6%) depletion after 8 and 16 days, respectively. Substantial amounts of benzo[a]pyrene (>50.0%) depletion were also achieved by Mucor racemosus CBMAI 847. Therefore, these two fungal strains were subjected to metabolism evaluation using the HPLC-DAD-MS technique. The results showed that A. sclerotiorum CBMAI 849 and M. racemosus CBMAI 847 were able to metabolize pyrene to the corresponding pyrenylsulfate and were able to metabolize benzo[a]pyrene to benzo[a]pyrenylsulfate, suggesting that the mechanism of hydroxylation is mediated by a cytochrome P-450 monooxygenase, followed by conjugation with sulfate ions. Because these fungi were adapted to the marine environment, the strains that were used in the present study are considered to be attractive targets for the bioremediation of saline environments, such as ocean and marine sediments that are contaminated by PAHs.  相似文献   

海底抛石声学探测方法——以渤海湾人工岛抛石检测为例     

史慧杰  尹延鸿  白大鹏  褚宏宪 《海洋地质前沿》2011,(4):65-70

通过水深测量和参量阵浅地层剖面测量相结合方法,从声学探测角度对海底抛石的检测方法进行探讨,结合渤海某人工岛抛石检测项目中应用实例,解释了抛石的厚度和分布情况.得出海底抛石厚度的分析应结合人工岛的侵蚀和淤积的分布情况判断,位于冲刷区的海底抛石厚度可以直接利用海底地形变化量判断,位于淤积区海底抛石厚度应为海底地形变化量减去...  相似文献   

矽卡岩矿床中的金和银     

Mein.  LD 李永明 《冶金地质动态》1990,(2):19-21

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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   

Evolution of Modern Yellow River Delta Coast     

尹延鸿  周永青  丁东 《海洋通报(英文版)》2004,6(2):34-44

This paper deals with the development and evolution of modem Yellow River delta and the erosion or deposition rates of its different sections. In June, 1996.Yellow Rivers terminal course was artificially turned eastwards to empty into the sea and then the 1 lth lobe of the modem Yellow River delta began to form. This course change may mark the beginning of the 3rd subdelta formation. As a result of that. the Yellow River delta advances towards east by north with the 1st, 2nd and 3rd subdeltas arranged in succession. Coast zone in the deltaic area is divided into 7 different sections according to their different erosion or deposition rates: the relatively stable section from Dakou River to Shunjiang Stream, the weakly retreating section from Shunjiang Stream to the Tiaohe River mouth, the strongly retreating section from the Tiaohe River mouth to the station 106. the artificially stable section due to stone dam protection from the station 106 to Gudong Oilfield, the strong deposition section from Gudong Oilfield to Dawenliu Haipu, the weakly deposition section from Dawenliu Haipu to the Zimai Stream mouth, and the stable section from the Zimai Stream mouth to the Jiaolai River mouth. It is predicted that the erosion and deposition situations of the sections will nearly remain the same in 10 years, but the retreating and silting-up rates will tend to become slower gradually. Human activities have an evident influence on the changes of the coastline.  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