Stable nitrogen isotope ratio in wood substrates and xylotrophic fungi in forest ecosystems of Western Siberia

It has been shown that wood substrates are the main source of nitrogen for xylotrophic fungi, which have almost the same isotopic signature as their substrate. This fact and a strong positive correlation in nitrogen isotope composition between the substrates and fungi provide evidence for a closed t...

Full description

Saved in:
Bibliographic Details
Published in:Russian journal of ecology 2014-11, Vol.45 (6), p.539-546
Main Authors: Mukhin, V. A, Voronin, P. Yu, Velivetskaya, T. A, Ignat’ev, A. V
Format: Article
Language:English
Subjects:
Biomedical and Life Sciences
Climatic conditions
climatic factors
decayed wood
Ecology
Environment
Forest ecosystems
Forests
Fungi
Isotopes
Life Sciences
Mineralization
Nitrogen
Nitrogen sources
Russian Academy of Sciences
Substrates
Terrestrial ecosystems
This Number of the Journal is Dedicated to the 70th Anniversary of Institute of Plant and Animal Ecology
Ural Branch
Wood
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:It has been shown that wood substrates are the main source of nitrogen for xylotrophic fungi, which have almost the same isotopic signature as their substrate. This fact and a strong positive correlation in nitrogen isotope composition between the substrates and fungi provide evidence for a closed type of nitrogen turnover in the wood-fungus system that is based on retention and repeated utilization of this element. Its isotope composition in the fungi depends on that in the substrate, which is enriched in the heavy isotope in deciduous wood and in the light isotope in coniferous wood. The nitrogen isotope composition in the fungi and wood substrates does not depend on the degree of wood mineralization or climatic conditions, and δ¹⁵N is not an indicator of fungal physiological activity or wood decomposition rate but rather a marker of the isotopic composition of nitrogen sources for the fungi.
ISSN:1067-4136
1608-3334
DOI:10.1134/S1067413614060095