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231224s2014 xx |||||o 00| ||eng c |
| 024 |
7 |
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|a 10.1111/nph.12828
|2 doi
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| 028 |
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|a pubmed24n0793.xml
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|e rakwb
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|a eng
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| 100 |
1 |
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|a Dunnette, Paul V
|e verfasserin
|4 aut
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| 245 |
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|a Biogeochemical impacts of wildfires over four millennia in a Rocky Mountain subalpine watershed
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|c 2014
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
|b c
|2 rdamedia
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|a ƒa Online-Ressource
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|2 rdacarrier
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|a Date Completed 30.03.2015
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|a Date Revised 30.09.2020
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|a published: Print-Electronic
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|a Citation Status MEDLINE
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|a © 2014 The Authors. New Phytologist © 2014 New Phytologist Trust.
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|a Wildfires can significantly alter forest carbon (C) storage and nitrogen (N) availability, but the long-term biogeochemical legacy of wildfires is poorly understood. We obtained a lake-sediment record of fire and biogeochemistry from a subalpine forest in Colorado, USA, to examine the nature, magnitude, and duration of decadal-scale, fire-induced ecosystem change over the past c. 4250 yr. The high-resolution record contained 34 fires, including 13 high-severity events within the watershed. High-severity fires were followed by increased sedimentary N stable isotope ratios (δ15N) and bulk density, and decreased C and N concentrations--reflecting forest floor destruction, terrestrial C and N losses, and erosion. Sustained low sediment C : N c. 20-50 yr post-fire indicates reduced terrestrial organic matter subsidies to the lake. Low sedimentary δ15N c. 50-70 yr post-fire, coincident with C and N recovery, suggests diminishing terrestrial N availability during stand development. The magnitude of post-fire changes generally scaled directly with inferred fire severity. Our results support modern studies of forest successional C and N accumulation and indicate pronounced, long-lasting biogeochemical impacts of wildfires in subalpine forests. However, even repeated high-severity fires over millennia probably did not deplete C or N stocks, because centuries between high-severity fires allowed for sufficient biomass recovery
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|a Journal Article
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|a Research Support, Non-U.S. Gov't
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|a Research Support, U.S. Gov't, Non-P.H.S.
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|a Pinus contorta
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| 650 |
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|a Rocky Mountain National Park
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|a biogeochemistry
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|a disturbance
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|a fire severity
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|a nitrogen isotopes
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|a paleoecology
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|a subalpine forests
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|a Organic Chemicals
|2 NLM
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| 650 |
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|a Water
|2 NLM
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|a 059QF0KO0R
|2 NLM
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|a Charcoal
|2 NLM
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|a 16291-96-6
|2 NLM
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| 700 |
1 |
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|a Higuera, Philip E
|e verfasserin
|4 aut
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| 700 |
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|a McLauchlan, Kendra K
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Derr, Kelly M
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Briles, Christy E
|e verfasserin
|4 aut
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| 700 |
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|a Keefe, Margaret H
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t The New phytologist
|d 1979
|g 203(2014), 3 vom: 15. Aug., Seite 900-12
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|g volume:203
|g year:2014
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|g day:15
|g month:08
|g pages:900-12
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|u http://dx.doi.org/10.1111/nph.12828
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