CO2 assimilation rate of canopy leaves in rain forest trees: high or low?
نویسندگان
چکیده
منابع مشابه
Herbivory as a Canopy Process in Rain Forest Trees
It has long been assumed that forests represented vast expanses of homogeneous green tissue, but this assumption is oversimplified. When walking through a forest, we usually focus our observations on a narrow band of green foliage, from ground level to about 2 m in height. This represents at most 10% of the foliage in mature forests, with the rest often high above our heads and consequently bey...
متن کاملMechanics and chemistry of rain forest leaves: canopy and understorey compared.
Despite the potential for changes during transit or preservation, the physicochemical properties of leaves are typically measured in a laboratory setting. A suite of laboratory methods adapted for use in the field is described here. The equipment is portable and operable in remote environments. Each technique has been validated against laboratory standards and has been tested throughout the tro...
متن کاملSun leaves up-regulate the photorespiratory pathway to maintain a high rate of CO2 assimilation in tobacco
The greater rate of CO2 assimilation (A n) in sun-grown tobacco leaves leads to lower intercellular and chloroplast CO2 concentrations and, thus, a higher rate of oxygenation of ribulose-1,5-bisphosphate (RuBP) than in shade-grown leaves. Impairment of the photorespiratory pathway suppresses photosynthetic CO2 assimilation. Here, we hypothesized that sun leaves can up-regulate photorespiratory ...
متن کاملWood CO2 efflux in a primary tropical rain forest
The balance between photosynthesis and plant respiration in tropical forests may substantially affect the global carbon cycle. Woody tissue CO2 efflux is a major component of total plant respiration, but estimates of ecosystem-scale rates are uncertain because of poor sampling in the upper canopy and across landscapes. To overcome these problems, we used a portable scaffolding tower to measure ...
متن کاملCapability of Rapid Eye Satellite Imagery to Map the Distribution of Canopy Trees in Dashtebarm Forest Area of Fars Province
In this research, the capability of Rapid Eye satellite imagery for mapping the crown distribution of oak trees in Zagros forests was investigated in the Dashtebarm forest area of Kazeroun, Fars province. In this study, data quality was investigated geometrically and radiometrically and geometric correction of the images was done using a linear method and using precision ground control ...
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ژورنال
عنوان ژورنال: Tropics
سال: 1995
ISSN: 0917-415X,1882-5729
DOI: 10.3759/tropics.4.287