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| Distributional characteristics of epiphytic bryophytes and the relationships with environmental factors in Hangzhou City |
| SHENG Wei1,2, MO Yaying2,3, HU Zhongjian1, RU Yalu1, WU Yuhuan1,2* |
(1. Key Laboratory of Hangzhou City for Ecosystem Protection and Restoration/College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou 310036, China; 2. Key Laboratory of Forest Ecology and Management, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China; 3. Hangzhou Botanical Garden, Hangzhou 310007, China)
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Abstract Based on the investigation of the diversity and ecological factors of epiphytic bryophytes from 21 sampling sites (including 178 trees, 2 848 quadrats) in Hangzhou City, 48 species belonging to 37 genera in 22 families of epiphytic bryophytes were recognized. The two-way indicator species analysis (TWINSPAN) results showed that the selected 21 sites could be divided into five groups with different habitats. The sample group Ⅳ had 21 species of bryophytes with the highest total coverage as 21.985 2%, and the sample group Ⅴ only had Lindbergia sinensis, with the smallest total coverage as 1.368 8% . The results reflected positive correlation between the distribution of epiphytic bryophytes and habitat types. Canonical correlation analysis (CCA) results showed that epiphytic bryophytes tended to be distributed on the southern side and the base of the trunk. There was no significant specificity between epiphytic bryophytes and the height and orientation of the trunks. The position of epiphytic trunks in urban trees was not strictly required for epiphyte bryophytes, indicating that the trunk’s orientation and height have no significant effect on the distribution of epiphytic bryophytes in Hangzhou City. It is implied that most species of epiphytic bryophytes are not closely related to orientation and height factors.
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Published: 25 November 2018
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杭州市树附生苔藓植物分布特征及其与环境的关系
通过对杭州市区21 个样点（178 棵树木，2 848 个样方）的树附生苔藓植物多样性及生态因子进行调查研究，共发现树附生苔藓植物22 科37 属48 种。双向指示种分析结果显示：所选的21 个样点可划分为生境不同的5 个组，样点组Ⅳ共计苔藓植物21 种，总盖度最大（21.985 2%）；样点组Ⅴ仅有中华细枝藓（Lindbergia sinensis），总盖度最小（1.368 8%），所得结果较好地反映了树附生苔藓植物分布与生境类型的正相关性。典型相关性分析结果显示，树附生苔藓植物倾向于分布在树干南面和树干基部，但苔藓植物种类对附生树干的高度和朝向没有表现出明显的专一性。城市树附生苔藓植物对附生树干的空间位置要求并不严格，即树干朝向和高度对杭州市树附生苔藓植物的分布没有显著影响，表明绝大多数的树附生苔藓植物种类和样点与朝向因子和高度因子间没有紧密联系。
关键词：
树附生苔藓植物,
双向指示种分析,
典型相关分析,
分布特征,
杭州市
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