Using Stable Isotope Techniques to Investigate Carbon Cycle Dynamics of an Agricultural Ecosystem PDF Download

Author: Jianmin Zhang
Publisher:
ISBN:
Category :
Languages : en
Pages : 348

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Author: International Atomic Energy Agency
Publisher:
ISBN: 9789201064172
Category : Technology & Engineering
Languages : en
Pages : 0

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"This publication provides an overview of conventional and isotopic methods available for measuring and modelling soil carbon dynamics. It includes information on the use of carbon isotopes in soil and plant research, including both theoretical and practical aspects of nuclear and radioisotope tracer techniques for in situ glasshouse and field labelling techniques to assess soil organic carbon turnover and sequestration, and provides up-to-date information on topics related to soil carbon sequestration and stabilization in agroecosystems. With its focus on practical application of radiotracer and stable isotope tracer techniques, it will be particularly useful for university and national research scientists working to improve soil organic matter management and conservation in agricultural systems."--Publisher's description.

Author: M.J. Unkovich
Publisher: Springer Science & Business Media
ISBN: 940159841X
Category : Science
Languages : en
Pages : 312

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Book Description
In the last two decades technological advances in isotope ratio mass spectrometry have been very rapid, opening up new possibilities for analysis of biological and environmental materials. The new instrumentation has facilitated faster analysis of samples via automated sample preparation and multi-isotope analysis of single samples, resulting in considerable cost savings, and enabling access to isotope analysis for many more researchers. These changes are reflected in the rapidly growing international literature on stable isotopes. While there have been some excellent books and review papers aimed at interpreting isotope signals in biology and environmental science, there have been fewer attempts to provide practical tools for researchers making forays into this exciting new arena. This book aims to address this inadequacy by providing a set of practical guidelines for the application of a range of novel and well proven stable isotope techniques to the fields of plant physiological ecology, agriculture, marine ecology and palaeoecology. The book is the outcome of a weeklong workshop held under the auspices of the Cooperative Research Centre for Legumes in Mediterranean Agriculture (CLIMA 1992 - 2000) at The University of Western Australia and the CSIRO Floreat Laboratories, Perth, Western Australia, in February 1999. The workshop was designed to provide practical tools and experiences for researchers and students concerned with how one goes about using stable isotopes in field investigations.

Author: Brian Fry
Publisher: Springer Science & Business Media
ISBN: 0387337458
Category : Science
Languages : en
Pages : 318

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A solid introduction to stable isotopes that can also be used as an instructive review for more experienced researchers and professionals. The book approaches the use of isotopes from the perspective of ecological and biological research, but its concepts can be applied within other disciplines. A novel, step-by-step spreadsheet modeling approach is also presented for circulating tracers in any ecological system, including any favorite system an ecologist might dream up while sitting at a computer. The author’s humorous and lighthearted style painlessly imparts the principles of isotope ecology. The online material contains color illustrations, spreadsheet models, technical appendices, and problems and answers.

Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :

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The goal of this research is to provide a better scientific understanding of carbon cycle processes within an agricultural landscape characteristic of the Upper Midwest. This project recognizes the need to study processes at multiple spatial and temporal scales to reduce uncertainty in ecosystem and landscape-scale carbon budgets to provide a sound basis for shaping future policy related to carbon management. Specifically, this project has attempted to answer the following questions: 1. Would the use of cover crops result in a shift from carbon neutral to significant carbon gain in corn-soybean rotation ecosystems of the Upper Midwest? 2. Can stable carbon isotope analyses be used to partition ecosystem respiration into its autotrophic and heterotrophic components? 3. Can this partitioning be used to better understand the fate of crop residues to project changes in the soil carbon reservoir? 4. Are agricultural ecosystems of the Upper Midwest carbon neutral, sinks, or sources? Can the proposed measurement and modeling framework help address landscape-scale carbon budget uncertainties and help guide future carbon management policy?

Author: H. Griffiths
Publisher: Garland Science
ISBN: 1000144631
Category : Science
Languages : en
Pages : 532

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In this authoritative review, leading international researchers explore the growing range of applications of stable isotope techniques for probing and integrating biological processes and palaeoclimatic cycles. The interdisciplinary approach covers a wide range of issues, opportunities and developments, setting interactions with plants in the context of water and nutrient cycles, exchanges with the atmosphere and modelling past and present climate change. This important book will appeal to those requiring an overview of the use of stable isotopes in aquatic, terrestrial and climatic processes and is in tune with current global concerns. In addition postgraduates and research scientists will find an extensive guide to more specialist disciplines, including developing mass spectrometer technologies, compound-specific and cellular-discrimination processes or whole organism and ecosystem responses.

Author:
Publisher: Elsevier
ISBN: 0080500749
Category : Science
Languages : en
Pages : 287

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Carbon Isotope Techniques is a hands-on introduction to using carbon isotope tracers in experimental biology and ecology. It provides an easy bench-top reference with many simple-to-follow protocols for studying plants, animals, and soils. The 11C, 12C, 13C, and 14C carbon isotopes are considered and standard techniques are described by established authors. This is a synthetic compilation of well-established techniques. Researchers and students in a wide range of disciplines spanning plant and soil science, agricultural chemistry, forestry, ecology, oceanography, limnology, biogeochemistry, anthropology, and archaeology will find Carbon Isotope Techniques a valuable resource. Features isotopes in ecological research Highlights specific user-oriented techniques Considers carbon cycle in plants, soils, animals, air, and water Provides examples and sample calculations for radioisotopes in plant, soil, and aquatic biology

Author: Kyle Scott Stropes
Publisher:
ISBN:
Category :
Languages : en
Pages :

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Isotope analysis combined with micrometeorological techniques can bring new insights into the mechanisms governing biogeochemical cycles in ecosystems. New field-deployable optical sensors that have recently become available can provide accurate trace gas concentration measurements at sampling rates suitable for micrometeorological measurements. These instruments could help enhance current carbon cycling research efforts. This research will bring new insights into understanding the biophysical processes governing the carbon cycle at the ecosystem scale, which will be crucial for enhancing our future climate change scenario predictions. The impact that land use management has on the carbon cycle components of an ecosystem is an important issue that could be addressed with this new approach. More notably, research is needed to identify how management practices affect the abundance of C3 and C4 plant communities in grasslands and to identify how shifts in plant community composition can modify the net ecosystem exchange of CO2. Chapter 1 of this thesis provides a literature review on the carbon cycle in grasslands, stable isotope analysis in environmental mediums, and the combination of isotope analysis with micrometeorological methods to study carbon exchange at the ecosystem scale. In Chapter 2, we describe the evaluation of the performance for a multi-port sampling system's measurements of vertical concentration gradients of stable isotopes of CO2. The results of these analyzes show that the sampling system was suitable to measure vertical gradients of concentration under field conditions. Chapter 3 describes how the sampling system was used to study the isotope exchange in two watersheds at the Konza Prairie Biological station under distinct management conditions. Gradients of isotopes were measured in two adjacent watersheds (K2A and C3SA). The K2A watershed is burned every other year, while the C3SA watershed is in a patch-burn grazing system and is burned every three years. Results show that the sampling system's performance is adequate for our study. The sampling system was able to detect clear differences in the isotopic composition of nighttime NEE between the watersheds, which is believed to be greatly influenced by C3 and C4 plant community composition. Further research is needed to examine the role that other environmental conditions played on altering the isotopic signals of the NEE in each watershed. Additionally, other management practices should be examined using this sampling system to determine their impact on biophysical drivers in the ecosystem, which could subsequently impact the plant community abundance and diversity.

Author: Dirk Miksche
Publisher:
ISBN:
Category : Agriculatural ecology
Languages : en
Pages : 131

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Author: Osvaldo E. Sala
Publisher: Springer Science & Business Media
ISBN: 1461212243
Category : Science
Languages : en
Pages : 441

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Ecology at the ecosystem level has both necessitated and benefited from new methods and technologies as well as those adapted from other disciplines. With the ascendancy of ecosystem science and management, the need has arisen for a comprehensive treatment of techniques used in this rapidly-growing field. Methods in Ecosystem Science answers that need by synthesizing the advantages, disadvantages and tradeoffs associated with the most commonly used techniques in both aquatic and terrestrial research. The book is divided into sections addressing carbon and energy dynamics, nutrient and water dynamics, manipulative ecosystem experiements and tools to synthesize our understanding of ecosystems. Detailed information about various methods will help researchers choose the most appropriate methods for their particular studies. Prominent scientists discuss how tools from a variety of disciplines can be used in ecosystem science at different scales.