The linkages between photosynthesis, productivity, growth and biomass in lowland Amazonian forests

The linkages between photosynthesis, productivity, growth and biomass in lowland Amazonian forests

© 2015 John Wiley & Sons Ltd.

Détails bibliographiques
Publié dans:Global change biology. - 1999. - 21(2015), 6 vom: 02. Juni, Seite 2283-95
Auteur principal: Malhi, Yadvinder (Auteur)
Autres auteurs: Doughty, Christopher E, Goldsmith, Gregory R, Metcalfe, Daniel B, Girardin, Cécile A J, Marthews, Toby R, Del Aguila-Pasquel, Jhon, Aragão, Luiz E O C, Araujo-Murakami, Alejandro, Brando, Paulo, da Costa, Antonio C L, Silva-Espejo, Javier E, Farfán Amézquita, Filio, Galbraith, David R, Quesada, Carlos A, Rocha, Wanderley, Salinas-Revilla, Norma, Silvério, Divino, Meir, Patrick, Phillips, Oliver L
Format: Article en ligne
Langue:English
Publié: 2015
Accès à la collection:Global change biology
Sujets:Journal Article Research Support, Non-U.S. Gov't allocation carbon cycle carbon use efficiency drought gross primary productivity net primary productivity residence time respiration plus... root productivity tropical forests Carbon 7440-44-0
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520 |a © 2015 John Wiley & Sons Ltd. 
520 |a Understanding the relationship between photosynthesis, net primary productivity and growth in forest ecosystems is key to understanding how these ecosystems will respond to global anthropogenic change, yet the linkages among these components are rarely explored in detail. We provide the first comprehensive description of the productivity, respiration and carbon allocation of contrasting lowland Amazonian forests spanning gradients in seasonal water deficit and soil fertility. Using the largest data set assembled to date, ten sites in three countries all studied with a standardized methodology, we find that (i) gross primary productivity (GPP) has a simple relationship with seasonal water deficit, but that (ii) site-to-site variations in GPP have little power in explaining site-to-site spatial variations in net primary productivity (NPP) or growth because of concomitant changes in carbon use efficiency (CUE), and conversely, the woody growth rate of a tropical forest is a very poor proxy for its productivity. Moreover, (iii) spatial patterns of biomass are much more driven by patterns of residence times (i.e. tree mortality rates) than by spatial variation in productivity or tree growth. Current theory and models of tropical forest carbon cycling under projected scenarios of global atmospheric change can benefit from advancing beyond a focus on GPP. By improving our understanding of poorly understood processes such as CUE, NPP allocation and biomass turnover times, we can provide more complete and mechanistic approaches to linking climate and tropical forest carbon cycling 
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650 4 |a Research Support, Non-U.S. Gov't 
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650 4 |a carbon cycle 
650 4 |a carbon use efficiency 
650 4 |a drought 
650 4 |a gross primary productivity 
650 4 |a net primary productivity 
650 4 |a residence time 
650 4 |a respiration 
650 4 |a root productivity 
650 4 |a tropical forests 
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700 1 |a Doughty, Christopher E  |e verfasserin  |4 aut 
700 1 |a Goldsmith, Gregory R  |e verfasserin  |4 aut 
700 1 |a Metcalfe, Daniel B  |e verfasserin  |4 aut 
700 1 |a Girardin, Cécile A J  |e verfasserin  |4 aut 
700 1 |a Marthews, Toby R  |e verfasserin  |4 aut 
700 1 |a Del Aguila-Pasquel, Jhon  |e verfasserin  |4 aut 
700 1 |a Aragão, Luiz E O C  |e verfasserin  |4 aut 
700 1 |a Araujo-Murakami, Alejandro  |e verfasserin  |4 aut 
700 1 |a Brando, Paulo  |e verfasserin  |4 aut 
700 1 |a da Costa, Antonio C L  |e verfasserin  |4 aut 
700 1 |a Silva-Espejo, Javier E  |e verfasserin  |4 aut 
700 1 |a Farfán Amézquita, Filio  |e verfasserin  |4 aut 
700 1 |a Galbraith, David R  |e verfasserin  |4 aut 
700 1 |a Quesada, Carlos A  |e verfasserin  |4 aut 
700 1 |a Rocha, Wanderley  |e verfasserin  |4 aut 
700 1 |a Salinas-Revilla, Norma  |e verfasserin  |4 aut 
700 1 |a Silvério, Divino  |e verfasserin  |4 aut 
700 1 |a Meir, Patrick  |e verfasserin  |4 aut 
700 1 |a Phillips, Oliver L  |e verfasserin  |4 aut 
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