摘要
通过野外调查和室内实验,对西藏林芝市色季拉山石生苔藓植物多样性进行了分析,并对该区域内的3种优势种的生物量、成土量、持水量等进行了测定.结果表明:石生藓类共8科12属16种,其中灰藓科(Hypnaceae)、羽藓科(Thuidiaceae)和曲尾藓科(Dicranaceae)为优势科,优势种为毛梳藓(Ptilium crista-cas-trensis)、棕色曲尾藓(Dicranum fuscescens)和锦丝藓(Actinothuidium hookeri);西藏色季拉山石生藓类优势种生物量为 110.7～763.6 g·m-2,成土量为 234.9～9063.3 g·m-2,最大持水量 2164.5～8514.5 g·m-2,最大持水率169％～400％、自然持水量1984.74～6764.5 g·m-2、自然持水率95％～318％.色季拉山石生藓类植物具有较好的成土和持水作用,可以有效防治水土流失,对保持水土具有重要意义.
Abstract
We investigated the diversity of epilithic mosses in Sejila Mountain of Nyingchi City,Tibet,and evalua-ted the biomass,soil formation capacity,and water holding capacity of three dominant species.The results showed that there were 8 families,12 genera and 16 species of epilithic mosses.Hypnaceae,Thuidiaceae,and Dicranaceae were the dominant families,while Ptilium crista-castrensis,Dicranum fuscescens,and Actinothuidium hookeri were the dominant species.Biomass of dominant species of epilithic mosses was 110.7-763.6 g·m-2,with a soil forma-tion capacity of 234.9-9063.3 g·m-2,a maximum water holding capacity of 2164.5-8514.5 g·m-2,a maximum water holding rate of 169％-400％,a natural water holding capacity of 1984.74-6764.5 g·m-2,and a natural wa-ter holding rate of 95％-318％.Therefore,the epilithic mosses in Sejila Mountain play an important role in soil for-mation and water holding,which is of great significance for soil erosion control and also for soil and water conserva-tion.
基金项目
西藏自治区自然科学基金重点项目(XZ202301ZR0039G)
西藏高原森林生态教育部重点实验室开放基金(XZA-JYBSYS-2023-15)
西藏高原森林生态教育部重点实验室开放基金(XZA-JYB-SYS-2023-03)
国家科技期刊平台
NSTL
万方数据