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193篇 您的检索式:作者名="Fjeld"
    题名 作者 年代 出处 被引量
1挪威湖泊沉积物中的微量元素污染显示文摘我们用挪威210个湖泊表层沉积物和工业化前沉积物中锑、汞、铋、镉、钼、砷、钴、镍、铬、铜、钒、铅和锌的浓度,研究了它们的近代大气沉积物。水表层沉积物中锑、汞、铋、镉、砷、铅的浓度比工业化前的沉积物高得多。差异随纬度和海拔的增高而缩小。对表层沉积物微量元素和主要成分(有机物、硅、铝、铁和锰)的多变量分析表明:锑、汞、铋、砷和铅组成一组,它们与有机物紧密相关。镍、铬和铜与无机沉积物部分(硅、铝)有微弱的相关而形成第二组。锌和镉与有机物微弱相关构成第三组。钴和锰相关,而钼和钒对其他微量元素和主要成分没有表现出明显的共变性。Sigurd Rognerud Eirik Fjeld 郑萧 2001AMBIO-人类环境杂志2001,30,1:15
2北欧湖泊的重金属调查:浓度、地理模式及与临界界限的关系显示文摘1995年秋天,北欧各国同时对本国的湖泊进行了调查,包括俄罗斯西北的科拉半岛。在大约3000个湖泊中,被调查的11种金属(铅、镉、砷、锌、铜、镍、钴、铁、锰、铬、钒)一般浓度较低,并具有明确的地理模式。对于铅、镉、锌和一定程度上钴的分布,远程迁移的空气污染带来的直接和间接影响是最重要的因素。湖中总有机碳(TOC)浓度对于铁和锰,并在一定程度上对于砷、铬和钒是重要的。对于铜和镍,基岩地质概况是最重要的控制因素,但在科拉半岛很多冶炼厂周围地区是个例外,在那里由于当地空气传播的污染,湖泊中铜和镍的浓度很高。基岩和地表的地质概况对于控制砷、钴、铬和钒的浓度也是重要的因素。调查结果表明在北欧国家湖泊中重金属污染在区域尺度上是一个较轻微的生态问题。Brit Lisa Skjelkvle Tom Andersen Eirik Fjeld Jaakko Mannio Anders Wilander Kjell Johansson Jens Peder Jensen Tatyana Moiseenko 孙学飞 2001AMBIO-人类环境杂志2001,30,1:11
3The potential drivers in forming avian biodiversity hotspots in the East Himalaya Mountains of Southwest China显示文摘Little has been published to describe or interpret Asian biodiversity hotspots,including those in the East Himalayan Mountains of Southwest China(HMSC),thus making necessary a review of the current knowledge.The Pliocene and Pleistocene geological and glacial histories of the Asian continent differ from those of Europe and North America,suggesting different mechanisms of speciation and extinction,and,thus,different responses to climate changes during the Quaternary glaciations.This short review summarizes potential drivers in shaping and maintaining high species richness and endemism of birds in the HMSC.The geographical location at the junction of different biogeographical realms,the wide range of habitats and climates along the extensive elevational range,the complex topography and the distinct geological history of this region have probably contributed to the evolution of an exceptionally species-rich and endemic-rich,specialized montane avian fauna.The Mountain systems in the HMSC may have provided refugia where species survived during the glacial periods and barriers for preventing species dispersal after the glacial periods.More studies are required to further test this refugia hypothesis by comparing more cold-tolerent and warm-tolerent species.Fumin LEI Yanhua QU Gang SONG Per ALSTRÖM Jon FJELDSÅ 2015Integrative Zoology2015,10,2:3
41995年北欧湖泊调查——芬兰、挪威、瑞典、丹麦、俄罗斯的科拉和科雷利亚地区、苏格兰和威尔士显示文摘在1995年秋,芬兰、挪威和瑞典采用规定的湖泊选择标准和分析程序开始了一项北欧湖泊的联合调查。尔后,该项目扩大到包括丹麦、俄罗斯的科拉(Kola)地区和科雷利亚(Karelia)地区、苏格兰和威尔士。调查覆盖了约1300 000km^2的地域;大约占欧洲总面积的13%,若不包括俄罗斯欧洲部分则占欧洲总面积的28%。在所调查区域内>0.04km^2的湖泊总数约为 155 000个,对其中3.7%的湖泊(5690个)进行了采样。湖泊密度大约为每9km^2一个湖,采样密度为每244km^2一个湖。对北部欧洲湖泊化学的首次常规评价表明,除了丹麦的湖泊以外,其他湖泊都以低离子浓度水(淡水)为特征,伴有低浓度的营养物质——氮和磷。由于在水文、降水化学、土壤覆盖及植被等方面的差异,各国的湖水化学有所不同。从西部的挪威、苏格兰和威尔士到东部的芬兰和科雷利亚,存在着降水由高到低(从5000mm/a到300mm/a)和从山区瘠薄和质地不匀的土壤到森林地区深厚土壤的逐渐变化。这两个因子都在湖水化学上有所反映,西部地区的碱基离子(basecation)(Ca、Mg、Na、K)浓度、碱度(HCO_3^-)和总有机碳(TOC)均低于东部地区。在苏格兰和威尔士湖水里的高水平TOC是一例外。瑞典、芬兰、苏格兰和威尔士的碱基离子中位值三倍于挪威的,TOC浓度变化更大。丹麦湖泊受基岩矿物学的影响不同于其它国家,而且在其集水区中农业活动的强度更大。丹麦湖泊的离子浓度一般要高得多,氮和磷的浓度也很高。在芬兰、挪威、瑞典以及俄罗斯的科拉和科雷利亚,50%以上的湖泊硫酸度(sulfur acidi-ty)临界负荷(CL)值很低,CL<60meq/m^2·a;而在苏格兰、威尔士和丹麦CL值低的湖泊极少。按目前的硫负荷计算,超过硫酸度临界负荷的湖泊数量百分比在挪威最高,为27%;在俄罗斯的科拉、瑞典和芬兰,分别为17%、9%和9%;在苏格兰仅为1%;而在威尔士却有24%。总的来说,超过硫酸度临界负荷的湖泊之和大约为22 000个,占北部欧洲湖泊总数的14%。ArneHenriksen BritLisaSkjelvle Jaakkko Mannio Anders Wilander Ron Harriman Chris Curtis Jens Peder Jensen Erik Fjeld Tatyana Moiseenko 沈英娃 1998人类环境杂志1998,27,2:2
5DWDM 40G transmission over trans-pacific distance (10 000 km)using CSRZ-DPSK,enhanced FEC,and al-Raman-amplified 100-km UltraWave fiber spans显示文摘RASMUSSEN C FJELDE T BENNIKE J 2004Journal of Lightwave Technology2004,22,:1
6The Cinnamon Ibon Hypocryptadius cinnamomeus is a forest canopy sparrow显示文摘Fjelds(a) J Irestedt M Ericson PGP Zuccon D 0,,:1
7A systematic relationships and biogeography of the tracheophone suboscines (Aves: Passeriformes)显示文摘Irestedt M Fjelds J Johansson US 2002Mol Phyl Evolution2002,23,:1
8Dynamic expression of Wnt signaling-related Dickkopf1, -2, and -3 mRNAs in the developing mouse tooth 显示文摘Fjeld K Kettunen P Furmanek T 2005Dev Dyn2005,233,1:1
9Modelling mixed columnar-equiaxed solidification with melt convection and grain sedimentation – Part I: Model description显示文摘M. Wu A. Fjeld A. Ludwig 2010Computational Materials Science2010,,1:1
10Use of path analysis to investigate mercury accumulation in brown trout (Salmo trutta) in Norway and the influence of environmental factors 显示文摘Fjeld E Rognerud S 1993Canadian Journal of Fisheries and Aquatic Sciences1993,50,6:1
11The African warbler genus Hyliota as a lost lineage in the oscine songbird tree:molecular support for an African origin of the Passerida显示文摘Fuchs J Fjelds(a) J Bowie RCK Voelker G Pasquet E 0,,:1
12Diversification across an altitudinal gradient in the Tiny Greenbul (Phyllastrephus debilis)from the Eastern Arc Mountains of Africa显示文摘Fuchs J Fjelds(a) J Bowie RCK 0,,:1
13Protein requirements ofinfants and children显示文摘DEWEY K G BEATON G FJELD C 1996European Journal of Clinical Nutrition1996,50,1:1
14Effects of light quality on flower and bud development in Begonia×hiemalis Fotsch显示文摘Fjeld T Rudnicki RM Moe R 1993Gartenbauwissenschaft1993,58,:1
15Imunmomodulating therapy with intravenaus immunoglobulin in patients with chronic heartfailure显示文摘Gullestad L Aass H Fjeld JG 2001Circulation2001,103,2:1
16Hybrid flux-splitting schemes for a two-phase flow model显示文摘Evje S Fjelde K K 2002Journal of Computational Physics2002,175,2:1
17Applications of the windowed FFT to electric power quality assessment显示文摘Heydt G T Fjeld P S Liu C C 1999IEEE Transactions on Power Delivery1999,14,4:1
18On a rough AUSM scheme for a one-dimensional two-phase model显示文摘Evje S Fjelde K K 2003Computer and uids2003,32,10:1
19The Enamel Surface and Bonding in Ortho- dontics显示文摘φgaard B Fjeld M 2010Semin Orthod2010,16,1:1
20A float concrete platform hull made of lightweight aggregate concrete显示文摘 Fjeld S 1996Engineering Structures1996,18,11:1
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