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231223s2010 xx |||||o 00| ||eng c |
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|a 10.1111/j.1469-8137.2010.03319.x
|2 doi
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|a eng
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|a Metcalfe, D B
|e verfasserin
|4 aut
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|a Shifts in plant respiration and carbon use efficiency at a large-scale drought experiment in the eastern Amazon
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|c 2010
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
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|2 rdamedia
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|a ƒa Online-Ressource
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|a Date Completed 28.10.2010
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|a Date Revised 09.03.2022
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|a published: Print-Electronic
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|a Citation Status MEDLINE
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|a *The effects of drought on the Amazon rainforest are potentially large but remain poorly understood. Here, carbon (C) cycling after 5 yr of a large-scale through-fall exclusion (TFE) experiment excluding about 50% of incident rainfall from an eastern Amazon rainforest was compared with a nearby control plot. *Principal C stocks and fluxes were intensively measured in 2005. Additional minor components were either quantified in later site measurements or derived from the available literature. *Total ecosystem respiration (R(eco)) and total plant C expenditure (PCE, the sum of net primary productivity (NPP) and autotrophic respiration (R(auto))), were elevated on the TFE plot relative to the control. The increase in PCE and R(eco) was mainly caused by a rise in R(auto) from foliage and roots. Heterotrophic respiration did not differ substantially between plots. NPP was 2.4 +/- 1.4 t C ha(-1) yr(-1) lower on the TFE than the control. Ecosystem carbon use efficiency, the proportion of PCE invested in NPP, was lower in the TFE plot (0.24 +/- 0.04) than in the control (0.32 +/- 0.04). *Drought caused by the TFE treatment appeared to drive fundamental shifts in ecosystem C cycling with potentially important consequences for long-term forest C storage
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|a Journal Article
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|a Research Support, Non-U.S. Gov't
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|a Soil
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|a Carbon Dioxide
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|a Williams, M
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| 773 |
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|i Enthalten in
|t The New phytologist
|d 1979
|g 187(2010), 3 vom: 10. Aug., Seite 608-21
|w (DE-627)NLM09818248X
|x 1469-8137
|7 nnns
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|g volume:187
|g year:2010
|g number:3
|g day:10
|g month:08
|g pages:608-21
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|u http://dx.doi.org/10.1111/j.1469-8137.2010.03319.x
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