Airborne fungal colonisation of coarse woody debris in North Temperate Picea abies forest: impact of season and local spatial scale.
Airborne fungal colonisation of coarse woody debris in North Temperate Picea abies forest: impact of season and local spatial scale.
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北温带云杉林中粗木质残骸的空气真菌定植：季节和局部空间尺度的影响。
DOI：
10.1017/s0953756204002084
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发表时间：
2005
影响因子：
--
通讯作者：
J. Stenlid
中科院分区：
文献类型：
--
作者：
R. Vasiliauskas;Vaidotas Lygis;K. Larsson;J. Stenlid
粗木质碎屑对森林生态系统中的真菌多样性很重要，但其在受管理林分中的可获得性降低。建议在砍伐过程中留下枯木，作为维持和恢复多样性的一种选择。然而，人们几乎不知道什么真菌会在受管理的地点留下的新鲜砍伐的木材上定居，以及定居过程如何受到生态因素的影响。在夏季和秋季，120个直径超过8厘米的新砍伐的云杉茎段被直立放置在北温带森林中相隔100米的两块离散的地块上的测绘位置。七周后，收集切片，并从其上表面进行真菌分离和鉴定。共分离出真菌943株，代表97种。夏季调查的物种丰富度比秋季调查高42.5%。不同季节的物种相似性较低(索伦森指数：S(S)=0.36，S(N)=0.34)，21种(22%)的观察频率受季节的影响较大。因此，夏季和秋季的群落结构存在显著差异(z检验；P<；0.001)。两个样地的物种丰富度相差不到10%，但只有一个样地含有种(66%)，因此质量相似度较低(S(S)=0.49)。数量相似性较高(S(N)=0.63)，表明两个地区的优势种在木材上的定植程度相似。两样地真菌群落结构差异显著(z检验；P<；0.001)。我们的数据显示，新鲜砍伐的CWD有助于管理的北温带森林中的真菌多样性，为来自100多个物种的众多个体提供了栖息地。同一林分内的真菌群落在小距离和不同季节都有明显的差异。以维持和加强管理林分中的真菌多样性。在收获期间，应该始终留着粗糙的木材。这项研究还证明了分子鉴定和ITS序列数据库对于探索自然群落中真菌多样性的重要性。
Coarse woody debris is important for mycodiversity in forest ecosystems, but its availability in managed stands is reduced. Leaving dead wood during felling is suggested as an option to sustain and restore the diversity. However, little is known what fungi would colonise freshly cut wood left on managed sites, and how the colonisation process is influenced by ecological factors. During summer and autumn, 120 freshly cut Picea abies stem sections over 8 cm in diameter were placed upright in mapped locations over two discrete plots separated by 100 m in a north-temperate forest. After seven weeks the sections were collected, and isolation and identification of fungi was done from their upper surfaces. In all 943 fungal strains were isolated, representing 97 species. Species richness in the summer survey was 42.5% higher than during the autumn survey. Low species similarity characterized the different seasons (Sorensen indices: S(S) = 0.36 and S(N) = 0.34) and for 21 species (22%) observation frequency was significantly affected by season. As a result, community structures in summer and autumn differed notably (z-test; P < 0.001). Species richness between the two plots differed by less than 10%, but there were 64 species (66%) found only in one of them, thus qualitative similarity was low (S(S) = 0.49). Quantitative similarity was higher (S(N) = 0.63), indicating that the dominant species colonised wood to a similar extent in both areas. Fungal community structure differed significantly among the two plots (z-test; P < 0.001). Our data showed that freshly cut CWD contributed to mycodiversity in managed north-temperate forest, providing habitats for numerous individuals from over 100 species. The fungal community within a single stand differed markedly both across small distances and over the seasons. In order to sustain and enhance mycodiversity in managed stands. coarse wood should always be left during harvesting. This study also demonstrates the importance of molecular identification and ITS sequence databases for exploring fungal diversity in natural communities.
DOI：
10.2737/pnw-gtr-164
发表时间：
1984
期刊：
--
影响因子：
--
作者：
C. Maser;J. Trappe
通讯作者：
C. Maser;J. Trappe