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Impacts of experime...
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Metcalfe, Daniel B.
(author)
Impacts of experimentally imposed drought on leaf respiration and morphology in an Amazon rain forest
- Article/chapterEnglish2010
Publisher, publication year, extent ...
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2010-01-28
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Wiley,2010
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printrdacarrier
Numbers
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LIBRIS-ID:oai:DiVA.org:umu-37319
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https://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-37319URI
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https://doi.org/10.1111/j.1365-2435.2009.01683.xDOI
Supplementary language notes
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Language:English
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Summary in:English
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Subject category:ref swepub-contenttype
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Subject category:art swepub-publicationtype
Notes
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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.
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Added entries (persons, corporate bodies, meetings, titles ...)
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Lobo-do-Vale, Raquel
(author)
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Chaves, Manuela M.
(author)
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Maroco, Joao P.
(author)
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Aragao, Luiz E. O. C.
(author)
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Malhi, Yadvinder
(author)
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Da Costa, Antonio L.
(author)
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Braga, Alan P.
(author)
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Goncalves, Paulo L.
(author)
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De Athaydes, Joao
(author)
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Da Costa, Mauricio
(author)
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Almeida, Samuel S.
(author)
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Campbell, Catherine,1976-Umeå universitet,Umeå Plant Science Centre (UPSC)(Swepub:umu)caca0029
(author)
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Hurry, Vaughan,1960-Umeå universitet,Institutionen för fysiologisk botanik,Umeå Plant Science Centre (UPSC)(Swepub:umu)vahu0001
(author)
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Williams, Mathew
(author)
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Meir, Patrick
(author)
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Umeå universitetUmeå Plant Science Centre (UPSC)
(creator_code:org_t)
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In:Functional Ecology: Wiley24:3, s. 524-5330269-84631365-2435
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