Department of Biology, Central Missouri State University, Warrensburg, Missouri 64093.
Mycologia. 2003 Jul-Aug;95(4):565-76. doi: 10.1080/15572536.2004.11833060.
Corticolous myxomycetes of the Great Smoky Mountains National Park were studied in relation to their association with certain tree species and height of occurrence in the forest canopy. Using the double-rope climbing method, bark was collected at 3 m increments to the tops of trees of five different species. Bark samples from 25 trees were used to prepare 418 moist chamber cultures maintained and observed 4 wk. Eighty-four myxomycete species were identified, including 30 species not known to occur in the park. Tree species, pH, height in tree and water-holding capacity of the bark samples were analyzed to determine the relationships of myxomycete assemblages cultured on the bark. Results suggested that myxomycete community composition among selected tree species were similar, but occurrence and abundance of certain species were related to differences in bark pH. Community similarity values among trees of different species show that trees with the most similar myxomycete communities also have the most similar bark pH. Most myxomycete species in this study have a pH optimum. No variation in species richness was detected at different heights in the trees, and most species were obtained at all heights up to at least 24 m. The water-holding capacity of the bark could not be correlated with species richness or abundance of myxomycetes that inhabit the bark of living trees. This is the first study to characterize myxomycete communities of tree canopies.
大烟山国家公园附生黏菌与某些树种和林冠中出现的高度的关系的研究。使用双绳攀爬法，从五棵不同树种的树顶以 3 m 的增量收集树皮。使用 25 棵树的树皮样本制备了 418 个保湿室培养物，维持并观察了 4 周。鉴定了 84 种黏菌，其中包括 30 种在公园中未知的物种。分析了树种、pH 值、树木中的高度和树皮样本的持水能力，以确定在树皮上培养的黏菌组合的关系。结果表明，选定树种之间的黏菌群落组成相似，但某些物种的出现和丰度与树皮 pH 值的差异有关。不同树种的树木之间的群落相似性值表明，具有最相似黏菌群落的树木也具有最相似的树皮 pH 值。本研究中的大多数黏菌物种具有最佳 pH 值。在树木的不同高度上没有检测到物种丰富度的变化，并且大多数物种在至少 24 米的所有高度都有。树皮的持水能力与栖息在活树树皮上的黏菌的物种丰富度或丰度无关。这是首次对树冠黏菌群落进行特征描述的研究。
