关键词: 腐木生苔藓植物, DCA排序, 分布格局, 农艺性状, 产量, 外源钙, 活性氧, 盐胁迫

Abstract: pplication of DCAto study the ecological distribution of saprophytic bryophytes in Changbai Mountains showed that there existed differences in the components of saprophytic bryophyte communities in Pinus koraiensis broad leaved mixed forest, dark conifer forest, and the transitive forest between Pinus koraiensis broad leaved mixed forest and dark conifer forest. In Pinus koraiensis broad leaved mixed forest, Plagiomnium cuspidatum, Thuidium philibertii and Brachythecium buchananii were the main saprophyte bryophytes. Plagiomnium cuspidatum, Trachycystis flagellaris, Thuidium cymbifolium, Callichladium haldanianum and Hylocomium splendens were the main saprophytic bryopytes in the transitive forest between Pinus koraiensis broad leaved forest and dark conifer forest. Whereas, Hylocomium splendens, Sanionia uncinata, Rhytidiadelphus triquetrus, Oncophorus wahlenbergii and Ptilium crist castrens were the main ones in dark conifer forest. The total coverage and species diversity of saprophytic bryophytes were the highest in dark conifer forest. Altitude and forest canopy density were the two important environmental factors influencing the distribution patterns of saprophytic bryophytes in the forest ecosystems in Changbai Mountains.

Key words: Saprophytic bryophyte, DCA ordination, Distribution pattern, yield, exogenous Ca²⁺, reactive oxygen, salt stress, agronomic characters