红松林和针阔叶混交林下黏菌物种多样性研究

Species diversity of myxomycetes in Pinus koraiensis forest and coniferous and broad-leaf mixed forest

为探讨不同林型下黏菌物种多样性的差异,本文在凉水国家级自然保护区内红松林和针阔叶混交林两种林分中开展调查研究,共采集黏菌样本242份,基于形态特征鉴定为4目7科17属50种黏菌,其中鲜红团网菌Arcyria insignis、网格筛菌Cribraria paucidictyon和玫瑰绒泡菌Physarum roseum等9种是黑龙江省新记录种,相对多度达16.67%。多样性分析显示,绿绒泡菌Physarum viride是凉水国家级自然保护区内的优势种,针阔叶混交林的黏菌物种多样性(H′=2.06)高于红松林(H′=1.71);在物种组成上,两种植被类型内共有的黏菌物种为17种,物种组成的相似性(CS)为50.75%,表明植被类型对黏菌的物种组成和多样性有着重要的影响。

Myxomycetes from Pinus koraiensis forest and coniferous and broad-leaf mixed forest in Liangshui National Nature Reserve were investigated. A total of 242 samples of myxomycetes was collected and 50 species belonging to 17 genera of seven families in four orders were identified based on morphological characteristics. Nine species were newly recorded in Heilongjiang Province including Arcyria insignis, Cribraria paucidictyon and Physarum roseum, and the relative abundance was 16.67%. Ph. viride was the most dominant species in Liangshui National Nature Reserve. The species diversity of myxomycetes was higher in mixed forest(H′=2.06) than that in Pinus koraiensis pure forest(H′=1.71). Seventeen species were common to both forest types and the composition similarity(CS) was 50.75%. Vegetation type seems important for the species composition and diversity of myxomycetes.