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Introductions - - Ecosystem
Introductions - - Ecosystem

... nutrient flows, and disturbance ecology, connection between systems, coming from community conservation education  Interests in working group – develop framework for assessing value of coastal habitats, utilize coastal habitats as a foundation for ecosystembased management  provide tools for manag ...
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... Simultaneously, the inputs of nitrogen through precipitation, biological fixation, and soil mineralization and nitrification will be determined, along with key parameters of N losses through denitrification and export by streams, allowing a preliminary nitrogen mass balance along the altitudinal gr ...
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Chapter 3 Ecosystems What Are They and How Do They Work

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Human impact on the nitrogen cycle



Human impact on the nitrogen cycle is diverse. Agricultural and industrial nitrogen (N) inputs to the environment currently exceed inputs from natural N fixation. As a consequence of anthropogenic inputs, the global nitrogen cycle (Fig. 1) has been significantly altered over the past century. Global atmospheric nitrous oxide (N2O) mole fractions have increased from a pre-industrial value of ~270 nmol/mol to ~319 nmol/mol in 2005. Human activities account for over one-third of N2O emissions, most of which are due to the agricultural sector. This article is intended to give a brief review of the history of anthropogenic N inputs, and reported impacts of nitrogen inputs on selected terrestrial and aquatic ecosystems.
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