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  • 1
    Online Resource
    Online Resource
    Berlin, Heidelberg :Springer Berlin / Heidelberg,
    Keywords: Old growth forests. ; Electronic books.
    Description / Table of Contents: The first ever book to focus on the ecosystem functioning of old-growth forests, this exhaustive compendium contains original research by the authors and is global in scope, studying boreal forests in Canada, temperate old-growth forests, and tropical forests.
    Type of Medium: Online Resource
    Pages: 1 online resource (518 pages)
    Edition: 1st ed.
    ISBN: 9783540927068
    Series Statement: Ecological Studies ; v.207
    DDC: 577.3
    Language: English
    Note: Intro -- 143763_1_En_FM_OnlinePDF -- Homage to Ernst-Detlef Schulze -- Preface -- Contents -- Contributors -- 143763_1_En_Part_1_OnlinePDF -- Part I: Introduction -- 143763_1_En_1_Chapter_OnlinePDF -- Chapter 1: Old-Growth Forests: Function, Fate and Value - an Overview -- 1.1 Old-Growth Forest Perception -- 1.2 Old-Growth Forest Services -- 1.3 Aims and Scope -- References -- 143763_1_En_2_Chapter_OnlinePDF -- Chapter 2: Old-Growth Forest Definitions: a Pragmatic View -- 2.1 Introduction -- 2.2 Old-Growth Forest Definitions and their Limitations -- 2.2.1 Structural Definitions -- 2.2.2 Successional Definitions -- 2.2.3 Biogeochemical Definitions -- 2.3 Use of the Term ``Old-Growth´´ - a Literature Survey -- 2.4 Old-Growth and the Disturbance Spectrum -- 2.4.1 Temporal Scale -- 2.4.2 Spatial Scale -- 2.5 Identifying Old-Growth - the Conservation Perspective -- 2.6 Conclusions and Pragmatic Considerations -- References -- 143763_1_En_3_Chapter_OnlinePDF -- Chapter 3: Old Trees and the Meaning of `Old´ -- 3.1 Introduction -- 3.2 Longevity of Conifers and Angiosperms -- 3.3 What Limits the Life Span of a Tree? -- 3.3.1 Programmed Cell Deathxe 1 senescence -- 3.3.2 Whole Plant Longevity -- Internal Versus External Factors -- 3.4 Concluding Remarks -- References -- 143763_1_En_Part_2_OnlinePDF -- Part II: Aboveground Processes2 -- 143763_1_En_4_Chapter_OnlinePDF -- Chapter 4: Ecophysiological Characteristics of Mature Trees and Stands - Consequences for Old-Growth Forest Productivity -- 4.1 Introduction -- 4.2 Increased Respiratory Demand -- 4.3 Limitations of Photosynthesis -- 4.3.1 Hydraulic Limitation -- 4.3.2 Reduced Sink Strength -- 4.4 Stand-Level Controls -- 4.5 Community and Ecosystem Constraints on Age/Size-Productivity Relationships -- 4.5.1 Light, Water and Nutrient Availability. , 4.5.2 Shifts in Ecophysiological Traits with Changes in Community Composition -- 4.5.3 Imperfect Acclimatisation of Late-Successional to Full Sunlight: A Case Study on European Beech (Fagus sylvaticaxe Fagus -- 4.6 Conclusions -- Acknowledgement -- References -- 143763_1_En_5_Chapter_OnlinePDF -- Chapter 5: The Imprint of Species Turnover on Old-Growth Forest Carbon Balances - Insights From a Trait-Based Model of Forest D -- 5.1 Introduction -- 5.2 A Trait-Based Model of Forest Carbon Dynamics -- 5.2.1 Successional Guilds -- 5.2.2 Model Structure -- 5.2.3 Input Data -- 5.2.4 Model Setup -- 5.3 The Spectrum of Traits -- 5.4 Model Performance and Lessons from the Equilibrium Behaviour -- 5.5 The Spectrum of Carbon Trajectories in North American Forests -- 5.6 Determinants of Old-Growth Carbon Stock Changes -- 5.7 Discussion -- 5.7.1 Limitations of Our Approach -- 5.7.2 Comparison with Independent Data -- 5.7.3 Why so Few Declines? -- 5.8 Conclusions -- Acknowledgements -- References -- 143763_1_En_6_Chapter_OnlinePDF -- Chapter 6: Functional Relationships Between Old-Growth Forest Canopies, Understorey Light and Vegetation Dynamics -- 6.1 Introduction -- 6.2 Structural and Compositional Features of Old-Growth -- 6.3 Understorey Light Environments and Dynamics -- 6.4 Consequences for Understorey Vegetation Composition and Dynamics -- 6.4.1 Traitsxe 1 traits of the Understorey Vegetation -- 6.5 Acclimatisation of Plant Form and Function to Low Light Availability -- 6.6 Resource Allocation and Shade Tolerance -- 6.6.1 Comparison among Biomes and Forest Types -- 6.7 Conclusions -- References -- 143763_1_En_7_Chapter_OnlinePDF -- Chapter 7: Biosphere-Atmosphere Exchange of Old-Growth Forests: Processes and Pattern -- 7.1 Introduction -- 7.2 Characteristics of Old-Growth Forests Relevant for Biosphere-Atmosphere Exchange -- 7.3 Exchange of Carbon Dioxide. , 7.4 Exchange of Water and Energy -- 7.5 Effect of Diffuse Light -- 7.6 Conclusions -- Acknowledgement -- References -- 143763_1_En_8_Chapter_OnlinePDF -- 8: Woody Detritus Mass and its Contribution to Carbon Dynamics of Old-Growth Forests: the Temporal Context -- 8.1 Introduction -- 8.2 Underlying Processes -- 8.2.1 Disturbance -- 8.2.2 Forest Re-Establishment -- 8.2.3 Mortality -- 8.2.4 Decomposition -- 8.2.5 CWD Amounts in Old-Growth Forests -- 8.3 Theoretical Trends -- 8.4 Comparison of Theoretical and Observed Temporal Trends -- 8.4.1 Studies Matching the Classic Model -- 8.4.2 Studies Not Matching the Classic Model -- 8.5 Effect of Management -- 8.6 Consequences for Net Ecosystem Carbon Balance -- 8.7 Reducing Observational Uncertainties -- 8.8 Conclusions -- Acknowledgments -- References -- 143763_1_En_Part_3_OnlinePDF -- Part III: Belowground Processes2 -- 143763_1_En_9_Chapter_OnlinePDF -- Chapter 9: Aboveground and Belowground Consequences of Long-Term Forest Retrogression in the Timeframe of Millennia and Beyond -- 9.1 Introduction -- 9.2 Lake Islands in Northern Sweden xe 0 Sweden -- 9.3 Retrogressive Successions Elsewhere in the World -- 9.4 Conclusions -- Acknowledgements -- References -- 143763_1_En_10_Chapter_OnlinePDF -- Chapter 10: Rooting Patterns of Old-Growth Forests: is Aboveground Structural and Functional Diversity Mirrored Belowground? -- 10.1 Introduction -- 10.2 What Comprises Belowground Structural Diversity? -- 10.3 Root Gaps and Horizontal Variation in Rooting Density in Old-Growth Forests -- 10.4 Pit-and-Mound Topographyxe 1 pit-and-mound topography in Old-Growth Forest -- 10.5 Old-Growth Structures Harbouring Roots -- 10.6 Influence of Stand Age on Diversity of Functional Root Types, Mycorrhizae, and the Vertical Patterning of Root Systems -- 10.7 Conclusions -- References -- 143763_1_En_11_Chapter_OnlinePDF. , Chapter 11: Soil Carbon Accumulationin Old-Growth Forests -- 11.1 Introduction -- 11.2 Development of Soil Carbon Stocks in Ecosystems -- 11.3 Soil Carbon Storage in Old-Growth Forests -- 11.3.1 Effects of Quantity and Quality of Input Material -- 11.3.2 Effects of Organic Matter Decomposition and Soil Respiration -- 11.3.3 Drainage of Dissolved Carbon from Forest Ecosystems -- 11.3.4 Soil Carbon Stock Changes -- 11.4 Case Study of Soil Carbon Sequestration in a 250-Year-Old Beech Forest -- 11.4.1 Site Description and Experimental Setup -- 11.4.2 Historical Carbon Export -- 11.4.3 Soil Respiration in Hainich NP -- 11.4.4 Carbon Export to the Liquid Phase -- 11.4.5 Development of Carbon Stocks -- 11.5 Discussion of Carbon Stock Changes -- 11.6 Conclusions -- Acknowledgements -- References -- 143763_1_En_12_Chapter_OnlinePDF -- Chapter 12: Is There a Theoretical Limit to Soil Carbon Storage in Old-Growth Forests? A Model Analysis with Contrasting Approaches -- 12.1 Introduction -- 12.2 Observations of Old-Growth Forest Carbon Balance -- 12.3 Is There a Theoretical Limit to Soil Carbon Storage? -- 12.3.1 Classical Carbon Pool Models -- 12.3.2 Alternative Model Concepts of Soil Carbon Dynamics -- 12.3.3 Complicating Factors not Considered -- 12.4 Perspectives for a New Generation of Models -- 12.4.1 Models Connecting the Decay Rate of Soil Carbon to the Size, Activity and Functional Diversity of Microbe Populations -- 12.4.2 Determining the Mechanisms Stabilising Recalcitrant Soil Carbon -- 12.5 Conclusions -- References -- 143763_1_En_Part_4_OnlinePDF -- Part IV: Biomes2 -- 143763_1_En_13_Chapter_OnlinePDF -- Chapter 13: Old-Growth Forests in the Canadian Boreal: the Exception Rather than the Rule? -- 13.1 Introduction -- 13.2 Abundance of Old-Growth Forests -- 13.3 Characteristics of Old-Growth Boreal Forests. , 13.3.1 Old-Growth Black Spruce Boreal Forest -- 13.3.2 Old-Growth Mixedwood Boreal Forest -- 13.3.3 Characterisation of Old-Growth Boreal Forests -- 13.4 Implications for Forest Managementxe 1 forest:management -- 13.5 Conclusions -- References -- 143763_1_En_14_Chapter_OnlinePDF -- Chapter 14: Biomass Chronosequences of United States Forests: Implications for Carbon Storage and Forest Management -- 14.1 Forest Management and Carbon Sequestration -- 14.2 Mechanisms of Biomass Decline -- 14.2.1 Transition from Even- to Uneven-Aged Stand Structure -- 14.2.2 Large Mortality Events -- 14.2.3 Successional Changes in Growth Conditions -- 14.2.4 Species Effects on Forest Stature -- 14.3 Aboveground Biomass Chronosequences for US Forests -- 14.3.1 Methods -- 14.3.2 Results -- 14.4 Discussion -- 14.4.1 Late-Successional AGB Trajectories -- 14.4.2 Summary and Validity of Results -- 14.4.3 Implications -- Acknowledgments -- References -- 143763_1_En_15_Chapter_OnlinePDF -- Chapter 15: Temperate and Boreal Old-Growth Forests: How do Their Growth Dynamics and Biodiversity Differ from Young Stands and Managed Fo -- 15.1 Introduction -- 15.2 Global Distribution of Temperate and Boreal Forests -- 15.3 Productivity of Temperate and Boreal Forests -- 15.4 Disturbance and Forest Succession at the Regional Scale -- 15.5 Effects of Management -- 15.6 Forest Management and Forest Protection in Europe -- 15.7 Conclusions -- References -- 143763_1_En_16_Chapter_OnlinePDF -- 16: Old-Growth Temperate Rainforests of South America: Conservation, Plant-Animal Interactions, and Baseline Biogeochemical -- 16.1 Introduction -- 16.2 Conservation Status, Values and Threats -- 16.2.1 Main Threats -- 16.2.2 Values -- 16.2.3 Conservationxe 1 conservation Prospects -- 16.3 Plant-Animal Interactions -- 16.4 Biogeochemistry. , 16.4.1 Relevant Features of the Nitrogen Cycle in Unpolluted South American Forests.
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  • 2
    ISSN: 1365-2486
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology , Energy, Environment Protection, Nuclear Power Engineering , Geography
    Notes: Soil microbial properties were studied from localities on a transect along the Yenisei River, Central Siberia. The 1000 km-long transect, from 56°N to 68°N, passed through tundra, taiga and pine forest characteristic of Northern Russia. Soil microbial properties were characterized by dehydrogenase activity, microbial biomass, composition of microbial community (PLFAs), respiration rates, denitrification and N mineralization rates. Relationships between vegetation, latitude, soil quality (pH, texture), soil organic carbon (SOC) and the microbial properties were examined using multivariate analysis. In addition, the temperature responses of microbial growth (net growth rate) and activity (soil respiration rate) were tested by laboratory experiments. The major conclusions of the study are as follows:1. Multivariate analysis of the data revealed significant differences in microbial activity. SOC clay content was positively related to clay content. Soil texture and SOC exhibited the dominant effect on soil microbial parameters, while the vegetation and climatic effects (expressed as a function of latitude) were weaker but still significant. The effect of vegetation cover is linked to SOC quality, which can control soil microbial activity.2. When compared to fine-textured soils, coarse-textured soils have (i) proportionally more SOC bound in microbial biomass, which might result in higher susceptibility of SOC transformation to fluctuation of environmental factors, and (ii) low mineralization potential, but with a substantial part of the consumed C being transformed to microbial products.3. The soil microbial community from the northernmost study region located within the permafrost zone appears to be adapted to cold conditions. As a result, microbial net growth rate became negative when temperature rose above 5 °C and C mineralization then exceeded C accumulation.
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Soils contain the largest near-surface reservoir of terrestrial carbon and so knowledge of the factors controlling soil carbon storage and turnover is essential for understanding the changing global carbon cycle. The influence of climate on decomposition of soil carbon has been well documented, ...
    Type of Medium: Electronic Resource
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  • 4
    ISSN: 1432-2048
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract. A method was developed for the purification of main intermediates and storage products of leaves and tubers of potato for analysis of their 13C content. The method was tested for recovery of metabolites and carbon isotope discrimination during the purification process. Leaf metabolite δ13C values showed an enrichment of starch relative to sucrose and citrate. This result is in agreement with previous findings in other higher plants and indicates the existence of isotope discrimination steps during transport and metabolism of triose-phosphates in potato leaf mesophyll cells. Active anaplerotic replenishment of the tricarboxylic acid cycle in the leaves of the plants investigated was also deduced from the significant 13C enrichment of malate relative to citrate and asparagine/aspartate relative to glutamine/glutamate. Analysis of tuber metabolite δ13C values showed no difference between starch and sucrose. However, tuber sucrose appeared significantly enriched compared with leaf sucrose and also relative to tuber citrate and malate. This finding suggests the existence of sites of isotopic discrimination during sucrose processing in developing tubers. It also confirms that metabolic cycles of sucrose synthesis and breakdown and of hexose-phosphate/triose-phosphate interconversion, which have been described in excised tuber tissue, also occur in intact organs. The δ13C values were also used to estimate the metabolic rate of carbon oxidation in developing tubers on the assumption that pyruvate dehydrogenase is the main site of isotopic discrimination in the tuber cells. The result obtained was in agreement with the available literature, suggesting that analyses of natural isotopic distribution in plant products may be a useful tool for the study of metabolic processes and sink-source relationships in intact plants.
    Type of Medium: Electronic Resource
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  • 5
    ISSN: 1040-0397
    Keywords: Graphite ; Carbon paste ; Diaphorase ; NADH ; Electrocatalysis ; Ascorbic acid ; Methylene green ; Meldola blue ; Purification ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The electrocatalytical oxidation of dihydronicotinamide adenine dinucleotide (NADH) and ascorbic acid was investigated on carbon paste (CP) electrodes doped by diaphorase and the mediators methylene green (MG) and meldola blue (MaB). Bioelectrocatalytical oxidation of NADH proceeds at the potential 0-0.25 V versus saturated calomel electrode (SCE). Km(app), Imax, and sensitivity were 0.9 and 3.6 mM, 1.4 and 6.7 μA, and 0.20 and 0.24 mA mM-1 cm-2 for MaB- and MG-doped CP electrodes, respectively. The biocatalytical process of NADH oxidation is not sensitive to oxygen, and optimum activity is at pH 7.3. The nonenzymatic electrocatalytical oxidation of NADH and ascorbic acid on CP electrodes doped by mediators proceeds at the same potential, and the efficiency of NADH oxidation was 50% in comparison to the biocatalytical process. Ascorbate oxidase immobilized on graphite powder was used to increase the selectivity of the electrocatalytical system of NADH oxidation over the electrochemical oxidation of ascorbic acid.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
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  • 6
    Publication Date: 2013-10-12
    Print ISSN: 0022-1430
    Electronic ISSN: 1727-5652
    Topics: Geography , Geosciences
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  • 7
    Publication Date: 2020-11-26
    Description: 1. Plant diversity is an important driver of belowground ecosystem functions, such as root growth, soil organic matter (SOM) storage, and microbial metabolism, mainly by influencing the interactions between plant roots and soil. Dissolved organic matter (DOM), as the most mobile form of SOM, plays a crucial role for a multitude of soil processes that are central for ecosystem functioning. Thus, DOM is likely to be an important mediator of plant diversity effects on soil processes. However, the relationships between plant diversity and DOM have not been studied so far. 2. We investigated the mechanisms underlying plant diversity effects on concentrations of DOM using continuous soil water sampling across 6 years and 62 plant communities in a long‐term grassland biodiversity experiment in Jena, Germany. Furthermore, we investigated plant diversity effects on the molecular properties of DOM in a subset of the samples. 3. Although DOM concentrations were highly variable over the course of the year with highest concentrations in summer and autumn, we found that DOM concentrations consistently increased with plant diversity across seasons. The positive plant diversity effect on DOM concentrations was mainly mediated by increased microbial activity and newly sequestered carbon in topsoil. However, the effect of soil microbial activity on DOM concentrations differed between seasons, indicating DOM consumption in winter and spring, and DOM production in summer and autumn. Furthermore, we found increased contents of small and easily decomposable DOM molecules reaching deeper soil layers with high plant diversity. 4. Synthesis. Our findings suggest that plant diversity enhances the continuous downward transport of DOM in multiple ways. On the one hand, higher plant diversity results in higher DOM concentrations, on the other hand, this DOM is less degraded. The present study indicates, for the first time, that higher plant diversity enhances the downward transport of dissolved molecules that likely stimulate soil development in deeper layers and therefore increase soil fertility.
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , isiRev
    Format: application/pdf
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  • 8
    Publication Date: 2019-02-25
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , isiRev
    Format: application/pdf
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  • 9
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    PANGAEA
    In:  Supplement to: Lauterbach, Stefan; Witt, Roman; Plessen, Birgit; Dulski, Peter; Prasad, Sushma; Mingram, Jens; Gleixner, Gerd; Hettler-Riedel, Sabine; Stebich, Martina; Schnetger, Bernhard; Schwalb, Antje; Schwarz, Anja (2014): Climatic imprint of the mid-latitude Westerlies in the Central Tian Shan of Kyrgyzstan and teleconnections to North Atlantic climate variability during the last 6000 years. The Holocene, 24(8), 970-984, https://doi.org/10.1177/0959683614534741
    Publication Date: 2023-03-02
    Description: In general, a moderate drying trend is observed in mid-latitude arid Central Asia since the Mid-Holocene, attributed to the progressively weakening influence of the mid-latitude Westerlies on regional climate. However, as the spatio-temporal pattern of this development and the underlying climatic mechanisms are yet not fully understood, new high-resolution paleoclimate records from this region are needed. Within this study, a sediment core from Lake Son Kol (Central Kyrgyzstan) was investigated using sedimentological, (bio)geochemical, isotopic, and palynological analyses, aiming at reconstructing regional climate development during the last 6000 years. Biogeochemical data, mainly reflecting summer moisture conditions, indicate predominantly wet conditions until 4950 cal. yr BP, succeeded by a pronounced dry interval between 4950 and 3900 cal. yr BP. In the following, a return to wet conditions and a subsequent moderate drying trend until present times are observed. This is consistent with other regional paleoclimate records and likely reflects the gradual Late Holocene diminishment of the amount of summer moisture provided by the mid-latitude Westerlies. However, climate impact of the Westerlies was apparently not only restricted to the summer season but also significant during winter as indicated by recurrent episodes of enhanced allochthonous input through snowmelt, occurring before 6000 cal. yr BP and at 5100-4350, 3450-2850, and 1900-1500 cal. yr BP. The distinct ~1500-year periodicity of these episodes of increased winter precipitation in Central Kyrgyzstan resembles similar cyclicities observed in paleoclimate records around the North Atlantic, likely indicating a hemispheric-scale climatic teleconnection and an impact of North Atlantic Oscillation (NAO) variability in Central Asia.
    Keywords: Core; CORE; GeoForschungszentrum Potsdam; GFZ; Kyrgyzstan; Lake_Son-Kol; SONK_11_D
    Type: Dataset
    Format: application/zip, 5 datasets
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  • 10
    Publication Date: 2023-03-02
    Keywords: AGE; Core; CORE; DEPTH, sediment/rock; GeoForschungszentrum Potsdam; GFZ; Kyrgyzstan; Lake_Son-Kol; n-Alkane C29, δD; SONK_11_D; Sum n-alkanes C17-C31
    Type: Dataset
    Format: text/tab-separated-values, 197 data points
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