Spatial and seasonal variation in leaf temperature within the canopy of a tropical forest

Título traducido de la contribución: Variación espacial y estacional de la temperatura de las hojas dentro del dosel de un bosque tropical

A. Camilo Rey-Sánchez, Martijn Slot, Juan M. Posada, Kaoru Kitajima

Resultado de la investigación: Contribución a RevistaArtículo

11 Citas (Scopus)

Resumen

Entender la variación de la temperatura de las hojas (Tleaf) en el dosel de los bosques tropicales es crítico para calcular con precisión la productividad primaria neta debido a que la respiración de las plantas y la fotosíntesis neta son altamente sensibles a la temperatura. Los objetivos de este estudio fueron (1) cuantificar la variación espacio temporal de la hoja en un bosque tropical semideciduo de Panamá y (2) crear un modelo empírico específico de la estación para predecir la hoja en el dosel. Para lograr esto, utilizamos una grúa de construcción de 42 m de altura para el acceso al dosel y monitoreamos el microambiente dentro del dosel de árboles maduros de 20-35 m de altura de 5 especies de árboles tropicales durante la estación húmeda y la estación seca. La hoja se correlacionó con la densidad de flujo fotónico fotosintético (PPFD) en la estación húmeda pero no en la estación seca, posiblemente debido a las diferencias estacionales en la velocidad del viento, fisiología y fenología del dosel. Un modelo de ecuación estructural mostró que la Tleaf se explica mejor por la temperatura del aire (Tair) y el PPFD en la estación húmeda, mientras que en la estación seca, Tair por sí solo predijo la mayor parte de la variación en la Tleaf. Estos resultados sugieren la utilidad de un enfoque empírico para estimar la variabilidad de la hoja de coca cuando se dispone de datos meteoro lógicos simples. Este enfoque puede incorporarse en futuros modelos de intercambio de carbono y agua entre la vegetación y la atmósfera de los bosques tropicales maduros con una estacionalidad similar.
Idioma originalEnglish (US)
Páginas (desde-hasta)75-89
Número de páginas15
PublicaciónClimate Research
Volumen71
N.º1
DOI
EstadoPublished - 2016
Publicado de forma externa

Huella dactilar

tropical forest
spatial variation
seasonal variation
canopy
Photons
Air
temperature
Fluxes
dry season
Temperature
photon flux density
Photosynthesis
Physiology
Cranes
wet season
Carbon
Productivity
Water
crane
air

All Science Journal Classification (ASJC) codes

  • Environmental Chemistry
  • Environmental Science(all)
  • Atmospheric Science

Citar esto

Rey-Sánchez, A. Camilo ; Slot, Martijn ; Posada, Juan M. ; Kitajima, Kaoru. / Spatial and seasonal variation in leaf temperature within the canopy of a tropical forest. En: Climate Research. 2016 ; Vol. 71, N.º 1. pp. 75-89.
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abstract = "Understanding leaf temperature (Tleaf) variation in the canopy of tropical forests is critical for accurately calculating net primary productivity because plant respiration and net photosynthesis are highly sensitive to temperature. The objectives of this study were to (1) quantify the spatiotemporal variation of Tleaf in a semi-deciduous tropical forest in Panama and (2) create a season-specific empirical model to predict Tleaf in the canopy. To achieve this, we used a 42 m tall construction crane for canopy access and monitored the microenvironment within the canopy of mature, 20-35 m tall trees of 5 tropical tree species during the wet and the dry season. Tleaf was correlated to photosynthetic photon flux density (PPFD) in the wet season but not in the dry season, possibly due to seasonal differences in wind speed, physiology, and canopy phenology. A structural equation model showed that Tleaf is best explained by air temperature (Tair) and PPFD in the wet season, whereas in the dry season, Tair alone predicted most of the variation in Tleaf. These results suggest the utility of an empirical approach to estimate Tleaf variability where simple meteoro logical data are available. This approach can be incorporated in future models of vegetation-atmosphere carbon and water exchange models of mature tropical forests with similar seasonality.",
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Spatial and seasonal variation in leaf temperature within the canopy of a tropical forest. / Rey-Sánchez, A. Camilo; Slot, Martijn; Posada, Juan M.; Kitajima, Kaoru.

En: Climate Research, Vol. 71, N.º 1, 2016, p. 75-89.

Resultado de la investigación: Contribución a RevistaArtículo

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