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  • English  (1,540)
  • Spanish  (14)
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  • 1970-1974  (359)
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  • 1973  (359)
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  • 1
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    Miscellanea Palaeontologica 7 (1999)
    Selbstverlag Fachbereich Geowissenschaften, FU Berlin
    In:  Herausgeberexemplar
    Details
    Publication Date: 2024-05-08
    Description: Inhaltsübersicht : Helmut Keupp & Daria Ivanova: Calcareous dinoflagellate cysts from the Late Jurassic and Early Cretaceous of the Western Forebalkan, Bulgaria … 3-31 ; Helmut Keupp & Rolf Kohring: Kalkige Dinoflagellatenzysten aus dem Obermiozän (NN 11 ) W von Rethimnon (Kreta) … 33-53 ; Dimitris Frydas, Helmut Keupp & Spyridon M. Bellas: Biostratigraphical research in Late Neogene marine deposits of the Chania Province, western Crete, Greece … 55-67 ; Glenn Fechner: "Microforaminiferal" lining taphonomy: A cautionary note … 69-81 ; Uwe Gloy & Rolf Kohring: Py-GC-Analysen an einem fossilen Harz aus dem Oberen Jura (Grube Guimarota/Portugal) … 83-88 ; Joachim Gründel: Truncatelloidea (Littorinimorpha, Gastropoda) aus dem Lias und Dogger Deutschlands und Nordpolens … 89-119 ; Helmut Keupp, Martin Röper & Adolf Seilacher: Paläobiologische Aspekte von syn vivo-besiedelten Ammonoideen im Plattenkalk des Ober-Kimmeridgiums von Brunn in Ostbayern … 121-145 ; Nikolaus Malchus: Identification of larval bivalve shells by means of simple statistics … 147-160 ; Carsten Helm, John W.M. Jagt & Manfred Kutscher: Early Campanian ophiuroids from the Hannover area (Lower Saxony, Northern Germany) … 161-173 ; Christian Neumann: New spatangoid echinoids (Echinodermata) from the Upper Cretaceous of Jordan: taxonomy and phylogenetic importance … 175-189 ; Oldrich Fejfar und Daniela C. Kalthoff: Aberrant cricetids (Platacanthomyines, Rodentia, Mammalia) from the Miocene of Eurasia … 191-206 ; Thekla Pfeiffer: Sexualdimorphismus, Ontogenie und innerartliche Variabilität der pleistozänen Cervidenpopulationen von Dama dama geiselana Pfeiffer 1998 und Cervus elaphus L. (Cervidae, Mammalia) aus Neumark-Nord (Sachsen-Anhalt, Deutschland) … 207-313 ; Beiträge zur Baikal-Rift-Forschung : MJ. Kuzmin et al.: Climatic events in Siberia during upper Brunhes according to the Lake Baikal sedimentary record … 315-323 ; S. K. Krivonogov et al.: The prospects of GIS use in investigation of the Baikal area … 325-328 ; Y. Masuda et al.: Perspective Studies of Freshwater Sponges in Lake Baikal … 329-332 ; Oleg A. Timoshkin: Biology of Lake Baikal: „White Spots“ and Progress in Research … 333-348 ; Bibliographie : Uwe Gloy: Bibliographie 1997, Institut für Paläontologie, FU Berlin … 349-352 ;
    Description: thesis
    Description: DFG, SUB Göttingen
    Keywords: ddc:560 ; Paläobiologie ; Paläontologie
    Language: German , English
    Type: doc-type:book
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    CITATION GEO-LEO
  • 2
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    GPS Meteorology - IGS contribution and GFZ activities for operational water vapor monitoring (1999)
    In:  Abstracts | Reports on geodesy
    Details
    Publication Date: 2024-05-02
    Language: English
    Type: info:eu-repo/semantics/conferenceObject
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    PAPER (OA)
  • 3
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    Göttinger Bodenkundliche Berichte 29 (1973)
    Universität Göttingen,Abteilung Bodenphysik
    In:  Universität Göttingen
    Details
    Publication Date: 2024-03-25
    Description: research
    Keywords: Modelling of Bioelement Cycling ; Beech Forest ; Solling District ; Ecosystem Models ; Input of Chemical Elements
    Language: English
    Type: doc-type:book
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    CITATION GEO-LEO
  • 4
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    Alpine treelines : functional ecology of the global high elevation tree limits (2012)
    Basel : Springer
    Details
    Call number: 9783034803960 (e-book)
    Type of Medium: 12
    Pages: 1 Online-Ressource (XI, 220 Seiten) , Illustrationen
    ISBN: 9783034803960 (e-book) , 978-3-0348-0396-0
    URL: Fulltext @ Ebook Central (AWI only)
    Language: English
    Note: Contents 1 High elevation treelines 1.1 The task 1.2 Previous works 2 Definitions and conventions 2.1 The life form ‘tree’ 2.2 Lines and transitions 2.3 Limitation, stress and disturbance 2.4 Altitude-related and other environmental drivers 2.5 Treeline nomenclature 3 Treeline patterns 3.1 Treeline taxa 3.2 The summit syndrome and other treeline depressions 3.3 Mass elevation effect 3.4 Treeline elevation 3.5 Time matters 3.6 Forest structure near treeline 4 Treeline climate 4.1 Specific aspects of treeline climatology 4.2 Criteria to define temperature regimes at treeline 4.3 Treeline temperatures in different bioclimatic regions 4.3.1 Subarctic and boreal zone (45–68° N) 4.3.2 Cool temperate zone (45–47° N, 44° S) 4.3.3 Warm temperate zone (28–42° N, 36° S) 4.3.4 Subtropical zone (19° S, 19° N) 4.3.5 Equatorial tropics (6° N to 3° S) 4.3.6 Mediterranean ‘treelines’ (38–42° N) 4.3.7 The Nothofagus and Metrosideros case 4.3.8 Treeline temperatures across bioclimatic zones 4.4 Seedbed and branch temperatures 4.5 Whole forest temperatures 5 Global mountain statistics based on treeline elevation 5.1 Mountain geostatistics 5.2 Elevational belts 5.3 Global treeline ecotones 6 Structure and stature of treeline trees 6.1 Foliage properties 6.2 Wood properties 6.3 Bark properties 6.4 Root traits 6.5 Tree stature 6.6 Dry matter allocation in treeline trees 7 Growth and development 7.1 Tree growth near the treeline 7.1.1 In situ growth of seedlings 7.1.2 In situ growth of saplings and adult trees 7.2 Xylogenesis at the treeline 7.2.1 In situ cambial activity 7.2.2 Apical growth dynamics 7.3 Root growth 7.4 Phenology at the treeline 8 Evolutionary adjustments to life at the treeline 8.1 Phylogenetic selection 8.2 Genotypic responses of growth and development 8.3 Genotypic responses of physiological traits 9 Reproduction, early life stages and tree demography 9.1 Amount and quality of seeds at high elevation 9.2 Germination, seedling and sapling stage 9.3 Tree demography at the treeline 10 Freezing and other forms of stress 10.1 Stress at the treeline in a fitness context 10.2 Mechanisms and principles of freezing resistance 10.3 Freezing resistance in treeline trees 10.4 Other forms of stress at the treeline 10.4.1 Freeze-thaw cycles and hydraulic failure 10.4.2 Winter desiccation 11 Water, nutrient and carbon relations 11.1 Tree water relations during the growing season 11.2 Nutrient relations 11.3 Carbon relations 12 Treeline formation - currently, in the past and in the future 12.1 Causes of current treelines 12.2 Treelines in the recent past 12.3 Treelines in the distant past (Holocene) 12.4 Treelines in the future References Subject Index Taxonomic Index
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    E-BOOK
  • 5
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    Carbohydrate-derived hydrothermal carbons: A thorough characterization study (2012)
    In:  Langmuir
    Details
    Publication Date: 2023-07-18
    Description: Hydrothermal carbonization (HTC) is an aqueous-phase route to produce carbon materials using biomass or biomass-derived precursors. In this paper, a comprehensive physicochemical and textural characterization of HTC materials obtained using four different precursors, namely, xylose, glucose, sucrose, and starch, is presented. The development of porosity in the prepared HTC materials as a function of thermal treatment (under an inert atmosphere) was specifically monitored using N2 and CO2 sorption analysis. The events taking place during the thermal treatment process were studied by a combined thermogravimetric/infrared (TGA-IR) measurement. Interestingly, these inexpensive biomass-derived carbon materials show good selectivity for CO2 adsorption over N2 (CO2/N2 selectivity of 20 at 273 K, 1 bar and 1:1 gas composition). Furthermore, the elemental composition, morphologies, degree of structural order, surface charge, and functional groups are also investigated.
    Language: English
    Type: info:eu-repo/semantics/article
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  • 6
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    Iconic CO2 Time Series at Risk (2012)
    In:  Science
    Details
    Publication Date: 2023-07-18
    Language: English
    Type: info:eu-repo/semantics/article
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  • 7
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    The meridional temperature gradient in the eastern North Atlantic during MIS 11 and its link to the ocean–atmosphere system (2012)
    In:  Palaeogeography, Palaeoclimatology, Palaeoecology
    Details
    Publication Date: 2023-07-18
    Description: Temporal and spatial patterns in eastern North Atlantic sea-surface temperatures (SST) were reconstructed for marine isotope stage (MIS) 11c using a submeridional transect of five sediment cores. The SST reconstructions are based on planktic foraminiferal abundances and alkenone indices, and are supported by benthic and planktic stable isotope measurements, as well as by ice-rafted debris content in polar and middle latitudes. Additionally, the larger-scale dynamics of the precipitation regime over northern Africa and the western Mediterranean region was evaluated from iron concentrations in marine sediments off NW Africa and planktic δ 13C in combination with analysis of planktic foraminiferal abundances down to the species level in the Mediterranean Sea. Compared to the modern situation, it is revealed that during entire MIS 11c sensu stricto (ss), i.e., between 420 and 398ka according to our age models, a cold SST anomaly in the Nordic seas co-existed with a warm SST anomaly in the middle latitudes and the subtropics, resulting in steeper meridional SST gradients than during the Holocene. Such a SST pattern correlates well with a prevalence of a negative mode of the modern North Atlantic Oscillation. We suggest that our scenario might partly explain the longer duration of wet conditions in the northern Africa during MIS 11c compared to the Holocene.
    Language: English
    Type: info:eu-repo/semantics/article
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  • 8
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    Informing policy: Science and knowledge in global environmental agreements (2012)
    In:  The Roads From Rio: Lessons Learned from Twenty Years of Multilateral Environmental Negotiations
    Details
    Publication Date: 2023-07-18
    Language: English
    Type: info:eu-repo/semantics/bookPart
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  • 9
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    Foreword (2012)
    In:  Recarbonization of the biosphere : ecosystems and the global carbon cycle
    Details
    Publication Date: 2023-07-18
    Language: English
    Type: info:eu-repo/semantics/bookPart
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  • 10
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    Biocomplexity—conceptual challenges for institutional analysis in biodiversity governance (2012)
    In:  Ecological Economics
    Details
    Publication Date: 2023-07-18
    Description: Institutions for biodiversity governance are located at the interface of human and ecological systems. The analysis of such institutions is challenged due to addressing a multitude of complex interactions between these two systems occurring at different natural scales and levels of human organization. Due to this complexity, empirical analysis of biodiversity management often leads to context-specific explanations, providing little scope for comparative work or the development of more generalised, theory-based accounts. We aim at reducing complexity in understanding human-biodiversity relations, making cases comparable across sites, and propose that, in order to address complexity, we need a method of abstraction that leads to the development of a more structured analysis, based on selection of explanatory factors according to cconceptual models as well as empirical significance. We suggest that the stylisation of typical "resource use-perspectives" - the combination of typical transactions that are inextricably linked by the interest of the actor - can be a useful method for realizing appropriate model selection. In this paper, we provide an account of how use-perspectives can be developed and to what kind of analysis they can contribute, using the example of agrobiodiversity in grain as seed, food, or genetic material.
    Language: English
    Type: info:eu-repo/semantics/article
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