Trait-based scaling of temperature-dependent foliar respiration in a species-rich tropical forest canopy

The scarcity of empirical data on leaf respiration (R) and its temperature sensitivity (e.g. Q10, defined as the proportional increase in R per 10 °C warming) causes uncertainty in current estimates of net primary productivity of tropical forests. We measured temperature response curves of R on 123...

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Autores Principales: Slot, Martijn, Rey?Sánchez, Camilo, Winter, Klaus, Kitajima, Kaoru
Formato: Artículo (Article)
Lenguaje:Inglés (English)
Publicado: Blackwell Publishing Ltd 2014
Materias:
NPP
Q10
Acceso en línea:https://repository.urosario.edu.co/handle/10336/24103
https://doi.org/10.1111/1365-2435.12263
id ir-10336-24103
recordtype dspace
spelling ir-10336-241032022-05-02T12:37:14Z Trait-based scaling of temperature-dependent foliar respiration in a species-rich tropical forest canopy Slot, Martijn Rey?Sánchez, Camilo Winter, Klaus Kitajima, Kaoru Carbon flux Climate change Gas exchange Leaf functional traits NPP Panama Q10 Temperature response of respiration The scarcity of empirical data on leaf respiration (R) and its temperature sensitivity (e.g. Q10, defined as the proportional increase in R per 10 °C warming) causes uncertainty in current estimates of net primary productivity of tropical forests. We measured temperature response curves of R on 123 upper-canopy leaves of 28 species of trees and lianas from a tropical forest in Panama and analysed variations in R and Q10 in relation to other leaf functional traits. Respiration rates per leaf area at 25 °C (RA) varied widely among species and were significantly higher in trees than in lianas. RA was best predicted by a multiple regression model containing leaf phosphorus concentration, photosynthetic capacity and leaf mass per area (r2 = 0·64). The mean Q10 value (2·4) was significantly higher than the commonly assumed value of 2·0. Q10 was best predicted by the combination of leaf carbohydrate concentration and growth form (trees vs lianas) (r2 = 0·26). The night-time leaf respiratory carbon flux from this tropical forest was calculated from these multiple regression models to be 4·5 Mg C ha-1 year-1, with an estimated additional 2·9 Mg C ha-1 year-1 being released by respiration during the day. Trait-based modelling has potential for estimating R, thus facilitating carbon flux estimation in species-rich tropical forests. However, in contrast to global analyses, leaf phosphorus content was the most important correlate of R and not leaf nitrogen, so calibration of trait models to the tropics will be important. Leaf traits are poor predictors of Q10 values, and more empirical data on the temperature sensitivity of respiration are critically needed to further improve our ability to scale temperature-dependent respiration in species-rich tropical forests. © 2014 British Ecological Society. 2014 2020-05-26T00:08:40Z info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 02698463 13652435 https://repository.urosario.edu.co/handle/10336/24103 https://doi.org/10.1111/1365-2435.12263 eng info:eu-repo/semantics/openAccess application/pdf Blackwell Publishing Ltd instname:Universidad del Rosario
institution EdocUR - Universidad del Rosario
collection DSpace
language Inglés (English)
topic Carbon flux
Climate change
Gas exchange
Leaf functional traits
NPP
Panama
Q10
Temperature response of respiration
spellingShingle Carbon flux
Climate change
Gas exchange
Leaf functional traits
NPP
Panama
Q10
Temperature response of respiration
Slot, Martijn
Rey?Sánchez, Camilo
Winter, Klaus
Kitajima, Kaoru
Trait-based scaling of temperature-dependent foliar respiration in a species-rich tropical forest canopy
description The scarcity of empirical data on leaf respiration (R) and its temperature sensitivity (e.g. Q10, defined as the proportional increase in R per 10 °C warming) causes uncertainty in current estimates of net primary productivity of tropical forests. We measured temperature response curves of R on 123 upper-canopy leaves of 28 species of trees and lianas from a tropical forest in Panama and analysed variations in R and Q10 in relation to other leaf functional traits. Respiration rates per leaf area at 25 °C (RA) varied widely among species and were significantly higher in trees than in lianas. RA was best predicted by a multiple regression model containing leaf phosphorus concentration, photosynthetic capacity and leaf mass per area (r2 = 0·64). The mean Q10 value (2·4) was significantly higher than the commonly assumed value of 2·0. Q10 was best predicted by the combination of leaf carbohydrate concentration and growth form (trees vs lianas) (r2 = 0·26). The night-time leaf respiratory carbon flux from this tropical forest was calculated from these multiple regression models to be 4·5 Mg C ha-1 year-1, with an estimated additional 2·9 Mg C ha-1 year-1 being released by respiration during the day. Trait-based modelling has potential for estimating R, thus facilitating carbon flux estimation in species-rich tropical forests. However, in contrast to global analyses, leaf phosphorus content was the most important correlate of R and not leaf nitrogen, so calibration of trait models to the tropics will be important. Leaf traits are poor predictors of Q10 values, and more empirical data on the temperature sensitivity of respiration are critically needed to further improve our ability to scale temperature-dependent respiration in species-rich tropical forests. © 2014 British Ecological Society.
format Artículo (Article)
author Slot, Martijn
Rey?Sánchez, Camilo
Winter, Klaus
Kitajima, Kaoru
author_facet Slot, Martijn
Rey?Sánchez, Camilo
Winter, Klaus
Kitajima, Kaoru
author_sort Slot, Martijn
title Trait-based scaling of temperature-dependent foliar respiration in a species-rich tropical forest canopy
title_short Trait-based scaling of temperature-dependent foliar respiration in a species-rich tropical forest canopy
title_full Trait-based scaling of temperature-dependent foliar respiration in a species-rich tropical forest canopy
title_fullStr Trait-based scaling of temperature-dependent foliar respiration in a species-rich tropical forest canopy
title_full_unstemmed Trait-based scaling of temperature-dependent foliar respiration in a species-rich tropical forest canopy
title_sort trait-based scaling of temperature-dependent foliar respiration in a species-rich tropical forest canopy
publisher Blackwell Publishing Ltd
publishDate 2014
url https://repository.urosario.edu.co/handle/10336/24103
https://doi.org/10.1111/1365-2435.12263
_version_ 1740172104970534912
score 12,131701