Influence of drinking water and diet on the stable-hydrogen isotope ratios of animal tissues
AUTOR(ES)
Hobson, Keith A.
FONTE
The National Academy of Sciences
RESUMO
Despite considerable interest in using stable-hydrogen isotope ratio (δD) measurements in ecological research, it was previously unknown whether hydrogen derived from drinking water, in addition to that derived from diet, contributed to the nonexchangeable hydrogen in animal tissues. We raised four experimental groups of quail (Coturnix coturnix japonica) from hatch on two isotopically distinct diets (mean nonexchangeable δD: −146 and −60‰, Vienna Standard Mean Ocean Water Standard) and drinking waters (mean δD: −130 and +196‰, Vienna Standard Mean Ocean Water Standard). Here we show that both dietary and drinking water hydrogen are incorporated into nonexchangeable hydrogen in both metabolically active (i.e., muscle, liver, blood, fat) and inactive (i.e., feather, nail) tissues. Approximately 20% of hydrogen in metabolically active quail tissues and 26–32% of feathers and nail was derived from drinking water. Our findings suggest environmental interpretations of δD values from modern and fossil animal tissues may need to account for potentially large isotopic differences between drinking water and food and require a good understanding of the physiological ecology of study organisms.
ACESSO AO ARTIGO
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=22177Documentos Relacionados
- Oxygen and Hydrogen Isotope Ratios of Water from Photosynthetic Tissues of CAM and C3 Plants 1
- Microbe forensics: Oxygen and hydrogen stable isotope ratios in Bacillus subtilis cells and spores
- Stable Carbon Isotope Ratios of Lipid Biomarkers of Sulfate-Reducing Bacteria
- Stable Hydrogen Isotope Fractionations during Autotrophic and Mixotrophic Growth of Microalgae
- The influence of calcium and magnesium in drinking water and diet on cardiovascular risk factors in individuals living in hard and soft water areas with differences in cardiovascular mortality