| Abstract: | We used a dynamic, long-term mass balance approach to track cumulative carbon (C) and nitrogen (N) losses to fire in boreal Manitoba over the 6500 years since deglaciation. Estimated C losses to decomposition and fire, combined with measurements of N pools in mature and burned forest floors, suggest that loss of N by combustion has likely resulted in a long-term loss that exceeds the amount of N stored in soil today by 2 to 3 times. These estimates imply that biological N fixation rates could be as high as 5 to 10 times atmospheric deposition rates in boreal regions. At the site scale, the amount of N lost is due to N content of fuels, which varies by stand type and fire severity, which in turn vary with climate and fire dynamics. The interplay of fire frequency, fire severity, and N partitioning during regrowth are important for understanding rates and sustainability of nutrient and carbon cycling over millenia and over broad regions. |
| Genre: | Article |
| ProdID: | 70025914 |
| Citation Author: | Harden, J. W.; Mack, M.; Veldhuis, H.; Gower, S. T. |
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| Citation Issue: | 3 |
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| Citation Language: | English |
| Citation Larger Work Title: | Journal of Geophysical Research D: Atmospheres |
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| Citation Search Results Text: | Fire dynamics and implications for nitrogen cycling in boreal forests; 2003; Article; Journal; Journal of Geophysical Research D: Atmospheres; Harden, J. W.; Mack, M.; Veldhuis, H.; Gower, S. T. |
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| Citation Volume: | 108 |
| Citation Year: | 2003 |
| Type: | citation/reference |
| Text: | Fire dynamics and implications for nitrogen cycling in boreal forests; 2003; Article; Journal; Journal of Geophysical Research D: Atmospheres; Harden, J. W.; Mack, M.; Veldhuis, H.; Gower, S. T. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| Date Other: | Wed, 1 Jan 2003 00:00 -0600 |
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