Impacts of environmental heterogeneity on moss diversity and distribution of Didymodon (Pottiaceae) in Tibet, China

Tibet makes up the majority of the Qinghai-Tibet Plateau, often referred to as the roof of the world. Its complex landforms, physiognomy, and climate create a special heterogeneous environment for mosses. Each moss species inhabits its own habitat and ecological niche. This, in combination with its sensitivity to environmental change, makes moss species distribution a useful indicator of vegetation alteration and climate change. This study aimed to characterize the diversity and distribution of Didymodon (Pottiaceae) in Tibet, and model the potential distribution of its species. A total of 221 sample plots, each with a size of 10 × 10 m and located at different altitudes, were investigated across all vegetation types. Of these, the 181 plots in which Didymodon species were found were used to conduct analyses and modeling. Three noteworthy results were obtained. First, a total of 22 species of Didymodon were identified. Among these, Didymodon rigidulus var. subulatus had not previously b...西藏占据了青藏高原（Qinghai-Tibet Plateau）的主体部分，而该高原素有"世界屋脊"之称。其复杂的地形、地貌与气候为苔藓营造了独特的异质生境。每一种苔藓都拥有专属的栖息环境与生态位，加之苔藓对环境变化具有高度敏感性，使得苔藓物种的分布格局可作为植被变迁与气候变化的有效指示指标。本研究旨在阐明西藏地区丛藓属（Didymodon，隶属于丛藓科Pottiaceae）的多样性与分布特征，并模拟其物种的潜在分布范围。研究覆盖所有植被类型，共调查了221个样地，每个样地面积为10米×10米，分布于不同海拔梯度。其中，发现有丛藓属物种分布的181个样地被用于后续分析与模型构建。本研究共获得三项重要结果：其一，共鉴定出22种丛藓属物种，其中刺叶丛藓亚变种Didymodon rigidulus var. subulatus此前尚未有...