基于生态水文学的黄河口湿地生态需水评价   总被引：2，自引：0，他引：2  

连煜  王新功  黄翀  刘高焕  王瑞玲  张绍锋  刘月良  Bas Pedroli 《地理学报》2008,63(5):451-461

根据生态系统保护的要求,以提高生态系统承载力、保护河口生态系统完整性和稳定性为原则,以促进区域生态系统的良性维持为目标,从生物多样性保护的角度,研究确定了23600hm^2的黄河三角洲应补水的湿地恢复和保护规模。在此基础上,采用景观生态学的原理和方法,在湿地植物生理学、生态学、水文学研究基础上及遥感和GIS技术的支持下,研究水分—生态耦合作用机理,建立基于生态水文学的黄河口湿地生态需水及评价模型,并运用预案研究方法和景观生态决策支持系统的规划评价思想,预测和评价了黄河口湿地不同补水方案产生的生态效果,重点研究了丹顶鹤、东方白鹳、黑嘴鸥等指示性物种适宜生境条件与湿地补水后的生态格局变化。评价结果表明,黄河三角洲湿地具备东方白鹳及丹顶鹤等保护性鸟类的繁殖和越冬的潜在生境条件,但其生境质量并不十分理想,通过湿地补水,作为珍稀鸟类重要栖息地芦苇湿地面积从现状的10000hm^2增加至22000hm^2,生态承载力大幅提高;研究在统筹黄河水资源条件、水资源配置工程措施和湿地生态系统综合保护需求后,推荐提出了黄河三角洲湿地恢复和保护的3.5亿m^3黄河补水量及补水时期。  相似文献   

Meteorology and oceanography of the Atlantic sector of the Southern Ocean—a review of German achievements from the last decade     

Hartmut H. Hellmer  Monika Rhein  Günther Heinemann  Janna Abalichin  Wafa Abouchami  Oliver Baars  Ulrich Cubasch  Klaus Dethloff  Lars Ebner  Eberhard Fahrbach  Martin Frank  Gereon Gollan  Richard J. Greatbatch  Jens Grieger  Vladimir M. Gryanik  Micha Gryschka  Judith Hauck  Mario Hoppema  Oliver Huhn  Torsten Kanzow  Boris P. Koch  Gert König-Langlo  Ulrike Langematz  Gregor C. Leckebusch  Christof Lüpkes  Stephan Paul  Annette Rinke  Bjoern Rost  Michiel Rutgers van der Loeff  Michael Schröder  Gunther Seckmeyer  Torben Stichel  Volker Strass  Ralph Timmermann  Scarlett Trimborn  Uwe Ulbrich  Celia Venchiarutti  Ulrike Wacker  Sascha Willmes  Dieter Wolf-Gladrow 《Ocean Dynamics》2016,66(11):1379-1413

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Microbial communities in karst groundwater and their potential use for biomonitoring   总被引：5，自引：2，他引：3  

Michiel Pronk  Nico Goldscheider  Jakob Zopfi 《Hydrogeology Journal》2009,17(1):37-48

The structure, diversity and dynamics of microbial communities from a swallow hole draining agricultural land and two connected karst springs (Switzerland) were studied using molecular microbiological methods and related to hydrological and physicochemical parameters. Storm responses and an annual hydrological cycle were monitored to determine the short- and long-term variability, respectively, of bacterial communities. Statistical analysis of bacterial genetic fingerprints (16S rDNA PCR-DGGE) of spring water samples revealed several clusters that corresponded well with different levels of the allochthonous swallow hole contribution. Microbial communities in spring water samples highly affected by the swallow hole showed low similarities among them, reflecting the high temporal variability of the bacterial communities infiltrating at the swallow hole. Conversely, high similarities among samples with low allochthonous contribution provided evidence for a stable autochthonous endokarst microbial community. Three spring samples, representative for low, medium and high swallow hole contribution, were analysed by cloning/sequencing in order to identify the major bacterial groups in the communities. The autochthonous endokarst microbial community was mainly characterized of δ-Proteobacteria, Acidobacteria and Nitrospira species. A high percentage of unknown sequences suggested further that many karst aquifer bacteria are still undiscovered. Finally, the potential use of groundwater biomonitoring using microbial communities is discussed.  相似文献   

Occurrence and distribution of microplastics in marine sediments along the Belgian coast   总被引：2，自引：0，他引：2  

Claessens M  De Meester S  Van Landuyt L  De Clerck K  Janssen CR 《Marine pollution bulletin》2011,62(10):2199-2204

Plastic debris is known to undergo fragmentation at sea, which leads to the formation of microscopic particles of plastic; the so called ‘microplastics’. Due to their buoyant and persistent properties, these microplastics have the potential to become widely dispersed in the marine environment through hydrodynamic processes and ocean currents. In this study, the occurrence and distribution of microplastics was investigated in Belgian marine sediments from different locations (coastal harbours, beaches and sublittoral areas).Particles were found in large numbers in all samples, showing the wide distribution of microplastics in Belgian coastal waters. The highest concentrations were found in the harbours where total microplastic concentrations of up to 390 particles kg⁻¹ dry sediment were observed, which is 15-50 times higher than reported maximum concentrations of other, similar study areas.The depth profile of sediment cores suggested that microplastic concentrations on the beaches reflect the global plastic production increase.  相似文献   

The pedagogy of autobiography in the history of geographic thought     

Michiel van Meeteren 《Norsk geografisk tidsskrift. Norwegian journal of geography》2019,73(4):250-255

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Solar Image Restoration By Use Of Multi-frame Blind De-convolution With Multiple Objects And Phase Diversity     

Michiel Van Noort  Luc Rouppe Van Der Voort  Mats G. Löfdahl 《Solar physics》2005,228(1-2):191-215

An extension of Joint Phase Diverse Speckle image restoration is presented. Multiple realizations of multiple objects having known wavefront relations with each other can now be restored jointly. As the alignment of the imaging setup does not change, near-perfect alignment can be achieved between different objects, thus greatly reducing false signals in the determination of derived quantities, such as magnetograms, Dopplergrams, etc. The method was implemented in C++ as an image restoration server, to which worker clients can connect and disconnect randomly, so that a large number of CPUs can be used to speed up the restorations. We present a number of examples of applications of the restoration method to observations obtained with the Swedish 1-m Solar Telescope on La Palma.  相似文献   

Preface     

Michiel Wagenaar  Virginie Mamadouh  Gertjan Dijkink 《GeoJournal》2000,51(1-2):1-2

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Severe Autumn storms in future Western Europe with a warmer Atlantic Ocean     

Michiel Baatsen  Reindert J. Haarsma  Aarnout J. Van Delden  Hylke de Vries 《Climate Dynamics》2015,45(3-4):949-964

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Fast large-scale reionization simulations     

Rajat M. Thomas  Saleem Zaroubi  Benedetta Ciardi  reas H. Pawlik  Panagiotis Labropoulos  Vibor Jeli&#;  Gianni Bernardi  Michiel A. Brentjens  A. G. de Bruyn  Geraint J. A. Harker  Leon V. E. Koopmans  Garrelt Mellema  V. N. Pandey  Joop Schaye  Sarod Yatawatta 《Monthly notices of the Royal Astronomical Society》2009,393(1):32-48

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Non-parametric foreground subtraction for 21-cm epoch of reionization experiments     

Geraint Harker  Saleem Zaroubi  Gianni Bernardi  Michiel A. Brentjens  A. G. de Bruyn  Benedetta Ciardi  Vibor Jeli&#;  Leon V. E. Koopmans  Panagiotis Labropoulos  Garrelt Mellema  ré Offringa  V. N. Pandey  Joop Schaye  Rajat M. Thomas  Sarod Yatawatta 《Monthly notices of the Royal Astronomical Society》2009,397(2):1138-1152

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