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Decline of photosynthetic capacity with leaf age in relation to leaf longevities for five tropical canopy tree species.
The effect of leaf aging on photosynthetic capacities was examined for upper canopy leaves of five tropical tree species in a seasonally dry forest in Panama, finding maximum oxygen evolution rates and leaf nitrogen content declined faster with age for species with shorter leaf life spans. Expand
Ecological Interpretation of Leaf Carbon Isotope Ratios: Influence of Respired Carbon Dioxide
Estimates of water-use efficiency from leaf carbon isotope content should be corrected for the contribution of the carbon isotopes composition of respired CO2 in closed-canopy forests. Expand
Coordinated changes in photosynthesis, water relations and leaf nutritional traits of canopy trees along a precipitation gradient in lowland tropical forest
This study links coordinated change in leaf functional traits that affect productivity and nutrient cycling to seasonality in lowland tropical forests with contrasting mean annual precipitation. Expand
Decline of photosynthetic capacity with leaf age and position in two tropical pioneer tree species.
The effect of leaf age on photosynthetic capacity, a critical parameter in the theory of optimal leaf longevity, was studied for two tropical pioneer tree species, Cecropia longipes and UreraExpand
Cloud cover limits net CO2 uptake and growth of a rainforest tree during tropical rainy seasons
Light, rather than water, temperature, or leaf nitrogen, was the primary factor limiting CO2 uptake during the rainy season, and photosynthesis, vegetative growth, and reproduction increased significantly. Expand
Variation in crown light utilization characteristics among tropical canopy trees.
Later-successional tree crowns, especially those with orthotropic branches, exhibit lower light extinction coefficients, but greater total LAI and total light extinction, which contribute to their efficient use of light and competitive dominance. Expand
Ecological and evolutionary consequences of desiccation tolerance in tropical fern gametophytes.
It is shown that vegetative DT (rare in vascular plants) is widely exhibited in fern gametophytes and the degree of tolerance is linked to species habitat preference, and it is proposed that gametophical morphology influences water-holding capacity, a novel mechanism that may help to explain how ferns have radiated into drought-prone habitats. Expand
Seasonal patterns of carbohydrate storage in four tropical tree species
The combination of high TNC concentrations and the large biomass of branches, trunks, and roots indicates these species are storing and moving large quantities of carbohydrates. Expand
Seasonal leaf phenotypes in the canopy of a tropical dry forest: photosynthetic characteristics and associated traits
Seasonal phenotypic differentiation observed in canopy tree species is achieved through changes in leaf mass per unit area and increased maximum stomatal conductance rather than by changes in nitrogen allocation patterns. Expand
Interactions between Acclimation and Photoinhibition of Photosynthesis of a Tropical Forest Understorey Herb, Alocasia macrorrhiza, during Simulated Canopy Gap Formation
1. The effects of a sudden increase in irradiance and the high leaf temperatures characteristic of a canopy gap environment were studied with chlorophyll fluorescence and gas-exchange measurements onExpand