Diversity and Decomposing Ability of Saprophytic Fungi from Temperate Forest Litter
Diversity and Decomposing Ability of Saprophytic Fungi from Temperate Forest Litter
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DOI：
10.1007/s00248-008-9458-8
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发表时间：
2009-07-01
影响因子：
3.6
通讯作者：
Beguiristain, Thierry
中科院分区：
文献类型：
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作者：
Kubartova, Ariana;Ranger, Jacques;Beguiristain, Thierry
本研究旨在探讨同一生态环境下不同树种下腐殖真菌的多样性。此外，两个阔叶，两个针叶和两个混合阔叶-针叶凋落物类型的多样性和分解速率之间的联系是有针对性的。凋落物材料分解在垃圾袋为4个月和24个月的目标分解的早期和晚期阶段。L和F层的真菌多样性也进行了调查，作为一个平行的垃圾袋法。温度梯度凝胶电泳指纹图谱用于评估样品中的真菌多样性。质量损失值和凋落物的有机和营养成分也进行了测量。结果表明，树种的变化对物种丰富度的影响不大。然而，群落组成因树种和分解阶段而异。对于这两个变量，在混合窝仔中发现了最重要的变化。24个月后，两种混合凋落物的物种丰富度最高（13.3种），与纯凋落物（6.3-10.7种）相比，群落组成差异最大。24个月后的质量损失是类似或更大的混合凋落物（70.5%山毛榉云杉，76.2%橡树花旗松凋落物）比原来的纯凋落物类型。这可能是由于更高的生态位变异和凋落物类型之间的营养转移的协同效应。在纯凋落物中，橡树和山毛榉凋落物的质量损失率最高（72.8%和69.8%），云杉和杜松凋落物的质量损失率最低（72.8%和69.8%）。杉木（分别为59.4%和66.5%）。这可能是由于一个更有利的小气候和阔叶林比针叶林凋落物组成。这些变量也似乎是更重要的纯凋落物分解率比真菌物种丰富度或群落结构。
This study was designed to examine saprophytic fungi diversity under different tree species situated in the same ecological context. Further, the link between the diversity and decomposition rate of two broadleaved, two coniferous and two mixed broadleaved-coniferous litter types was targeted. Litter material was decomposed in litter bags for 4 and 24 months to target both early and late stages of the decomposition. Fungal diversity of L and F layers were also investigated as a parallel to the litter bag method. Temperature gradient gel electrophoresis fingerprinting was used to assess fungal diversity in the samples. Mass loss values and organic and nutrient composition of the litter were also measured. The results showed that the species richness was not strongly affected by the change of the tree species. Nevertheless, the community compositions differed within tree species and decomposition stages. The most important shift was found in the mixed litters from the litter bag treatment for both variables. Both mixed litters displayed the highest species richness (13.3 species both) and the most different community composition as compared to pure litters (6.3-10.7 species) after 24 months. The mass loss after 24 months was similar or greater in the mixed litter (70.5% beech-spruce, 76.2% oak-Douglas-fir litter) than in both original pure litter types. This was probably due to higher niche variability and to the synergistic effect of nutrient transfer between litter types. Concerning pure litter, mass loss values were the highest in oak and beech litter (72.8% and 69.8%) compared to spruce and D. fir (59.4% and 66.5%, respectively). That was probably caused by a more favourable microclimate and litter composition in broadleaved than in coniferous plantations. These variables also seemed to be more important to pure litter decomposition rates than were fungal species richness or community structure.