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Biogeochemistry of ...
Biogeochemistry of beetle-killed forests : Explaining a weak nitrate response
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Rhoades, Charles C. (author)
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McCutchan, James H., Jr. (author)
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Cooper, Leigh A. (author)
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Clow, David (author)
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Detmer, Thomas M. (author)
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Briggs, Jennifer S. (author)
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Stednick, John D. (author)
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Veblen, Thomas T. (author)
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Ertz, Rachel M. (author)
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- Likens, Gene E. (author)
- Uppsala universitet,Limnologi
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Lewis, William M., Jr. (author)
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(creator_code:org_t)
- 2013-01-14
- 2013
- English.
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In: Proceedings of the National Academy of Sciences of the United States of America. - : Proceedings of the National Academy of Sciences. - 0027-8424 .- 1091-6490. ; 110:5, s. 1756-1760
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https://www.pnas.org...
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
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- A current pine beetle infestation has caused extensive mortality of. lodgepole pine (Pinus contorta) in forests of Colorado and Wyoming; it is part of an unprecedented multispecies beetle outbreak extending from Mexico to Canada. In United States and European watersheds, where atmospheric deposition of inorganic N is moderate to low (<10 kg.ha.y), disturbance of forests by timber harvest or violent storms causes an increase in stream nitrate concentration that typically is close to 400% of predisturbance concentrations. In contrast, no significant increase in streamwater nitrate concentrations has occurred following extensive tree mortality caused by the mountain pine beetle in Colorado. A model of nitrate release from Colorado watersheds calibrated with field data indicates that stimulation of nitrate uptake by vegetation components unaffected by beetles accounts for significant nitrate retention in beetle-infested watersheds. The combination of low atmospheric N deposition (<10 kg.ha.y), tree mortality spread over multiple years, and high compensatory capacity associated with undisturbed residual vegetation and soils explains the ability of these beetle-infested watersheds to retain nitrate despite catastrophic mortality of the dominant canopy tree species.
Keyword
- nitrogen biogeochemistry
- streamwater chemistry
- nitrate loss
- watershed disturbance
Publication and Content Type
- ref (subject category)
- art (subject category)
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Rhoades, Charles ...
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McCutchan, James ...
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Cooper, Leigh A.
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Clow, David
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Detmer, Thomas M ...
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Briggs, Jennifer ...
-
show more...
-
Stednick, John D ...
-
Veblen, Thomas T ...
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Ertz, Rachel M.
-
Likens, Gene E.
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Lewis, William M ...
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show less...
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Proceedings of t ...
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Uppsala University