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Carbon Isotope Discrimination and Photosynthesis
We discuss the physical and enzymatic bases of carbone isotope discrimination during photosynthesis, noting how knowledge of discrimination can be used to provide additional insight intoExpand
A global analysis of root distributions for terrestrial biomes
Rooting patterns for terrestrial biomes are analyzed and distributions for various plant functional groups are compared and the merits and possible shortcomings of the analysis are discussed in the context of root biomass and root functioning. Expand
Global vegetation change through the Miocene/Pliocene boundary
Between 8 and 6 million years ago, there was a global increase in the biomass of plants using C4 photosynthesis as indicated by changes in the carbon isotope ratios of fossil tooth enamel in Asia,Expand
A mechanistic model for interpretation of hydrogen and oxygen isotope ratios in tree-ring cellulose
A mechanistic model is presented to quantify both the physical and biochemical fractionation events associated with hydrogen and oxygen isotope ratios in tree-ring cellulose. The model predicts theExpand
Plant Physiological Ecology
Lecture Course Objective: A survey of physiological approaches to understanding plantenvironment interactions from the functional perspective. Lectures cover physiological adaptation; limitingExpand
Carbon isotope ratios in belowground carbon cycle processes
Analyses of carbon isotope ratios (δ13C) in soil organic matter (SOM) and soil respired CO2 provide insights into dynamics of the carbon cycle. δ13C analyses do not provide direct measures of soilExpand
C4 photosynthesis, atmospheric CO2, and climate
It is suggested that C4 dicots may not have been selected until CO2 concentrations reached their lowest levels during glacial maxima in the Quaternary, and it is proposed that leaf venation patterns play a role in increasing the light-use efficiency of most C4 monocots. Expand
Carbon isotope fractionation between diet, breath CO2, and bioapatite in different mammals
The carbon isotope fractionation between tooth enamel bioapatite, breath CO2, and diet was measured for voles, rabbits, pigs, and cattle on controlled diets and there is a 1:1 correlation between 3*ediet and 3* enamelediet, consistent with the hypothesis that inter-species differences in 3-ediet are primarily a result of differences in digestive physiology. Expand
Quantum Yields for CO2 Uptake in C3 and C4 Plants: Dependence on Temperature, CO2, and O2 Concentration
The quantum yields of C3 and C4 plants from a number of genera and families as well as from ecologically diverse habitats were measured in normal air of 21% O2 and in 2% O2. At 30 C, the quantumExpand
Nitrogen isotopes in mammalian herbivores: hair δ15N values from a controlled feeding study
The data reveal that mammalian herbivores eating identical diets can have hair δ15N values that differ by as much as 3.6‰, which suggests that interspecific physiological differences can lead to larger shifts in δ 15N values than a shift in trophic level. Expand