Stable carbon isotope ratio in xylotrophic fungi and their substrates

Data on the ratio of stable carbon isotopes in xylotrophic fungi and their xylic substrates are presented for the first time. It is shown that coniferous substrates are more enriched in the heavy carbon isotope, compared to deciduous substrates. In both cases, however, their carbon isotope compositi...

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Bibliographic Details
Published in:Russian journal of ecology 2014, Vol.45 (1), p.11-17
Main Authors: Mukhin, V. A, Voronin, P. Yu, Velivetskaya, T. A, Ignat’ev, A. V
Format: Article
Language:English
Subjects:
Biomedical and Life Sciences
carbon
Carbon cycle
Carbon isotopes
correlation
Ecology
Environment
Forest soils
Forests
fungi
isotopes
Life Sciences
Mineralization
Soil microorganisms
Substrates
Terrestrial ecosystems
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Summary:Data on the ratio of stable carbon isotopes in xylotrophic fungi and their xylic substrates are presented for the first time. It is shown that coniferous substrates are more enriched in the heavy carbon isotope, compared to deciduous substrates. In both cases, however, their carbon isotope composition is characterized by low variability and does not correlate with the species or physiological type of decomposer fungus but shows a statistically significant correlation with the degree of wood mineralization. The ratio of stable carbon isotopes in the fungi depends on that in their substrates but is shifted in favor of the heavier isotope. This trophic shift lacks species specificity, is equally manifested in decomposers of deciduous and coniferous substrates, remains unchanged along the latitudinal climatic gradient, and is positively correlated with the carbon isotope composition of substrates, in the absence of correlation with the degree of their mineralization.
ISSN:1067-4136
1608-3334
DOI:10.1134/S1067413614010093