Search: onr:"swepub:oai:DiVA.org:umu-37319" >
Impacts of experime...
Impacts of experimentally imposed drought on leaf respiration and morphology in an Amazon rain forest
-
Metcalfe, Daniel B. (author)
-
Lobo-do-Vale, Raquel (author)
-
Chaves, Manuela M. (author)
-
show more...
-
Maroco, Joao P. (author)
-
Aragao, Luiz E. O. C. (author)
-
Malhi, Yadvinder (author)
-
Da Costa, Antonio L. (author)
-
Braga, Alan P. (author)
-
Goncalves, Paulo L. (author)
-
De Athaydes, Joao (author)
-
Da Costa, Mauricio (author)
-
Almeida, Samuel S. (author)
-
- Campbell, Catherine, 1976- (author)
- Umeå universitet,Umeå Plant Science Centre (UPSC)
-
- Hurry, Vaughan, 1960- (author)
- Umeå universitet,Institutionen för fysiologisk botanik,Umeå Plant Science Centre (UPSC)
-
Williams, Mathew (author)
-
Meir, Patrick (author)
-
show less...
-
(creator_code:org_t)
- 2010-01-28
- 2010
- English.
-
In: Functional Ecology. - : Wiley. - 0269-8463 .- 1365-2435. ; 24:3, s. 524-533
- Related links:
-
http://repositorio.i...
-
show more...
-
https://urn.kb.se/re...
-
https://doi.org/10.1...
-
show less...
Abstract
Subject headings
Close
- 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.
Subject headings
- NATURVETENSKAP -- Biologi -- Botanik (hsv//swe)
- NATURAL SCIENCES -- Biological Sciences -- Botany (hsv//eng)
Publication and Content Type
- ref (subject category)
- art (subject category)
Find in a library
To the university's database
- By the author/editor
-
Metcalfe, Daniel ...
-
Lobo-do-Vale, Ra ...
-
Chaves, Manuela ...
-
Maroco, Joao P.
-
Aragao, Luiz E. ...
-
Malhi, Yadvinder
-
show more...
-
Da Costa, Antoni ...
-
Braga, Alan P.
-
Goncalves, Paulo ...
-
De Athaydes, Joa ...
-
Da Costa, Mauric ...
-
Almeida, Samuel ...
-
Campbell, Cather ...
-
Hurry, Vaughan, ...
-
Williams, Mathew
-
Meir, Patrick
-
show less...
- About the subject
-
- NATURAL SCIENCES
-
NATURAL SCIENCES
-
and Biological Scien ...
-
and Botany
- Articles in the publication
-
Functional Ecolo ...
- By the university
-
Umeå University