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Impacts of experime...
Impacts of experimentally imposed drought on leaf respiration and morphology in an Amazon rain forest
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Metcalfe, Daniel B. (författare)
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Lobo-do-Vale, Raquel (författare)
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Chaves, Manuela M. (författare)
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visa fler...
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Maroco, Joao P. (författare)
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Aragao, Luiz E. O. C. (författare)
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Malhi, Yadvinder (författare)
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Da Costa, Antonio L. (författare)
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Braga, Alan P. (författare)
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Goncalves, Paulo L. (författare)
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De Athaydes, Joao (författare)
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Da Costa, Mauricio (författare)
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Almeida, Samuel S. (författare)
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- Campbell, Catherine, 1976- (författare)
- Umeå universitet,Umeå Plant Science Centre (UPSC)
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- Hurry, Vaughan, 1960- (författare)
- Umeå universitet,Institutionen för fysiologisk botanik,Umeå Plant Science Centre (UPSC)
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Williams, Mathew (författare)
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Meir, Patrick (författare)
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(creator_code:org_t)
- 2010-01-28
- 2010
- Engelska.
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Ingår i: Functional Ecology. - : Wiley. - 0269-8463 .- 1365-2435. ; 24:3, s. 524-533
- Relaterad länk:
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http://repositorio.i...
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- P>1. The Amazon region may experience increasing moisture limitation over this century. Leaf dark respiration (R) is a key component of the Amazon rain forest carbon (C) cycle, but relatively little is known about its sensitivity to drought. 2. Here, we present measurements of R standardized to 25 degrees C and leaf morphology from different canopy heights over 5 years at a rain forest subject to a large-scale through-fall reduction (TFR) experiment, and nearby, unmodified Control forest, at the Caxiuana reserve in the eastern Amazon. 3. In all five post-treatment measurement campaigns, mean R at 25 degrees C was elevated in the TFR forest compared to the Control forest experiencing normal rainfall. After 5 years of the TFR treatment, R per unit leaf area and mass had increased by 65% and 42%, respectively, relative to pre-treatment means. In contrast, leaf area index (L) in the TFR forest was consistently lower than the Control, falling by 23% compared to the pre-treatment mean, largely because of a decline in specific leaf area (S). 4. The consistent and significant effects of the TFR treatment on R, L and S suggest that severe drought events in the Amazon, of the kind that may occur more frequently in future, could cause a substantial increase in canopy carbon dioxide emissions from this ecosystem to the atmosphere.
Ämnesord
- NATURVETENSKAP -- Biologi -- Botanik (hsv//swe)
- NATURAL SCIENCES -- Biological Sciences -- Botany (hsv//eng)
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Metcalfe, Daniel ...
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Lobo-do-Vale, Ra ...
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Chaves, Manuela ...
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Maroco, Joao P.
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Aragao, Luiz E. ...
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Malhi, Yadvinder
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visa fler...
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Da Costa, Antoni ...
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Braga, Alan P.
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Goncalves, Paulo ...
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De Athaydes, Joa ...
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Da Costa, Mauric ...
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Almeida, Samuel ...
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Campbell, Cather ...
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Hurry, Vaughan, ...
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Williams, Mathew
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Meir, Patrick
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visa färre...
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