Reply to R. J. Francey
| Autor: | F H Schmidt, Pieter Meiert Grootes, D. D. Leach, Minze Stuiver, G W Farwell |
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| Rok vydání: | 1989 |
| Předmět: | |
| Zdroj: | Tellus B; Vol 41, No 4 (1989) |
| ISSN: | 1600-0889 0280-6509 |
| DOI: | 10.3402/tellusb.v41i4.15106 |
| Popis: | The difference in interpretation can indeed be reduced to two different basic concepts. Our results suggest that assimilation of biospheric decomposition CO 2 is the most logical way to explain the observed large Δ 14 C differences between tree-stem cellulose and tropespheric CO 2 in 1963. It should be noted that Δ 14 C is corrected for isotopic fractionation using δ 13 C and thus is insensitive to the effects of light, humidity, etc., on isotopic fractionation of carbon during photosynthesis. One then h s to conclude that subcanopy air and photosynthate exported by different branches to the stem are incompletely mixed. DOI: 10.1111/j.1600-0889.1989.tb00327.x |
| Databáze: | OpenAIRE |
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