Laboratory of Stream Ecology, Department of Plant Biology and Ecology, University of the Basque Country, P.O. Box 644, 48080, Bilbao, Spain.
Microb Ecol. 2012 Aug;64(2):279-90. doi: 10.1007/s00248-012-0022-1. Epub 2012 Feb 23.
The community of aquatic hyphomycetes associated with decomposing alder leaf litter was studied during autumn-winter in nine headwater reference streams of the Basque Country (northern Spain). In order to study the spatial variability in composition and community structure, three streams from each of three different river basins were compared. The colonization dynamics and community changes throughout the decomposition process were also followed in three of the rivers (one per basin). The taxonomic richness and community structure of these fungi varied among rivers, including similar streams of a given watershed. However, neither species diversity nor total abundance was statistically related to environmental variables. Only the conidial production of two of the species, Flagellospora curvula and Lunulospora curvula appeared to be enhanced by nitrate availability in the water. The taxonomic richness and the reproductive activity (sporulation rate) were positively related to the leaf litter decomposition rate. The changes in conidial production along the process were similar for all the streams and helped explain leaf litter quality dynamics.
与分解桤木叶凋落物相关的水生丝孢菌群落，在西班牙北部巴斯克地区（Basque Country）的 9 条源头参照溪流的秋冬季节进行了研究。为了研究组成和群落结构的空间变异性，对来自三个不同流域的每条溪流的三个样本进行了比较。在其中三条河流（每个流域一条）中，还跟踪了整个分解过程中的定殖动态和群落变化。这些真菌的分类丰富度和群落结构在河流之间存在差异，包括给定流域的相似溪流。然而，物种多样性和总丰度与环境变量均无统计学关系。只有两种真菌的分生孢子产量，即 Flagellospora curvula 和 Lunulospora curvula，似乎受到水中硝酸盐可用性的促进。分类丰富度和生殖活性（孢子形成率）与叶凋落物分解率呈正相关。所有溪流的分生孢子产量的变化过程相似，有助于解释叶凋落物质量动态。
