Summary
Carbon isotope ratios were used to survey the distribution of photosynthetic pathways among taxa, the relationship between photosynthetic pathway and habitat light levels, and the relationship between intercellular CO2 levels of C3 plants and habitat light levels within a subtropical monsoon forest in southern China. Of 128 species, most (94) possessed the C3 photosynthetic pathway; 33 species possessed the C4 pathway and all of these were restricted to high light locations. There was one epiphytic CAM species. The C3 species were classified as occurring in open, intermediate, and closed canopy sites. Among C3 species, carbon isotope ratios tended to become more negative with decreasing light availability in the habitat.
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C.I.W.D.P.B. Pub no 931
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Ehleringer, J.R., Lin, Z.F., Field, C.B. et al. Leaf carbon isotope ratios of plants from a subtropical monsoon forest. Oecologia 72, 109–114 (1987). https://doi.org/10.1007/BF00385053
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DOI: https://doi.org/10.1007/BF00385053