We examined whether sporocarp carbon and nitrogen isotope ratios (δ¹³C and δ¹⁵N values) reflected different functional strategies in 15 species of wood decay fungi. In Finnish Picea abies forests, we compared sporocarp δ¹³C and δ¹⁵N against log diameter, proximity to ground, and three wood decay types, specifically brown rot, nonselective white rot, and selective white rot (targeting hemicellulose and lignin preferentially). In regression analysis (adjusted r² = 0.576), species accounted for 31% of variability in δ¹³C, with factors influencing wood δ¹³C accounting for the remainder. Brown rot fungi and three white rot fungi that selectively attacked hemicellulose (Heterobasidion parviporum, Phellopilus nigrolimitatus, and Trichaptum abietinum) were higher in δ¹³C than nonselective white rot fungi. This was attributed to greater assimilation of ¹³C-enriched pentoses from hemicellulose by these fungi. The pathogenic white rot fungus Heterobasidion parviporum had higher δ¹⁵N with proximity to ground and increasing log diameter. This suggested that ¹⁵N-enriched soil N contributed to decomposing logs and that Heterobasidion growing from a bigger resource base had increased access to soil N. These isotopic patterns accordingly reflected both functional diversity of wood decay fungi and site-specific factors.

我们检查子实体碳和氮同位素比率（δ是否¹³ C和δ ^15个N个值）反映在15种木材腐朽的真菌的不同功能的策略。在芬兰欧洲云杉的森林中，我们比较子实体δ ¹³ C和δ ¹⁵对圆木直径，靠近地面，以及三个木材腐朽的类型，具体褐腐病，非选择性白腐病，和选择性的白腐N（靶向半纤维素和木质素优先）。在回归分析（调整后的R ²  = 0.576），种δ占变性的31％¹³ ℃，用因子，影响木材δ ¹³C占余数。褐腐真菌和三种白腐真菌，其选择性地攻击半纤维素（Heterobasidion parviporum，Phellopilus nigrolimitatus和Trichaptum abietinum）为在δ更高¹³比非选择性白腐真菌℃。这归因于这些真菌从半纤维素中更多吸收了¹³种富含C的戊糖。致病白腐真菌Heterobasidion parviporum具有较高的δ ¹⁵ n，其中接近地面和增加圆木直径。这表明¹⁵种富含N的土壤N导致了原木的分解和异源化 从更大的资源基础上生长增加了土壤氮的获取。这些同位素模式相应地反映了木材腐烂真菌的功能多样性和特定地点的因素。