منابع مشابه
Applications of C and N stable isotopes to ecological and environmental studies in seagrass ecosystems.
Stable isotopes of carbon and nitrogen are increasingly used in marine ecosystems, for ecological and environmental studies. Here, we examine some applications of stable isotopes as ecological integrators or tracers in seagrass ecosystem studies. We focus on both the use of natural isotope abundance as food web integrators or environmental tracers and on the use of stable isotopes as experiment...
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The oxygen isotope ratio of dissolved inorganic phosphate (δ(18)Op) represents a novel and potentially powerful stable isotope tracer for biogeochemical research. Analysis of δ(18)Op may offer new insights into the relative importance of different sources of phosphorus within natural ecosystems. Due to the isotope fractionations that occur alongside the metabolism of phosphorus, δ(18)Op could a...
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A new isotope separator has been designed, constructed, and put into routine operation for separation of 133Xe providing a major advancement and significant cost reduction in preparation of this radioactive isotope. The design features and advantages are discussed that expedite high purity separation of relatively small quantities of this isotope. These advantages could be easily used to expedi...
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Millennium Ecosystem Assessment documented the importance of ecosystem services. It is therefore important to include these services in the national system of economic accounts. This requires estimation of “accounting prices” for ecosystems, that is, the marginal value of a change in the size of the system. This raises a number of questions: What do we mean by the “size” of the system? What is ...
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IT ecosystems systems composed of a large number of distributed, autonomous, cooperating, decentralized, interacting, organically grown, heterogeneous, and continually evolving subsystems are the future system generation. Today’s state of the art does not enable us to develop these systems. Within the NTH Focused Research School for IT Ecosystems, research project AIM deals with methods and too...
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ژورنال
عنوان ژورنال: BioScience
سال: 2003
ISSN: 0006-3568
DOI: 10.1641/0006-3568(2003)053[0795:ife]2.0.co;2