杭州市区土生苔藓植物分布与生态因子的关系  

Relationships between distribution of soil-born bryophytes in urban area of Hangzhou and related ecological factors.

作　　者：刘艳[1] 曹同[1] 王剑[2] 曹阳[3] 

机构地区：[1]中国科学院沈阳应用生态研究所 [2]上海师范大学生命与环境科学学院,上海200234 [3]上海交通大学生命科学技术学院,上海200240

出　　处：《应用生态学报》2008年第4期775-781,共7页Chinese Journal of Applied Ecology

基　　金：国家自然科学基金项目(30770141);上海市教委重点科研项目(062219);上海师范大学创新资助项目(DYL603)

摘　　要：在杭州市区设立的21个样点中,记录到土生苔藓植物22科31属47种.基于样点中苔藓植物种类的生态重要值和样点生态因子数据进行典范对应分析.结果表明:人为干扰和土壤pH是影响杭州市区土生苔藓植物分布的主要生态因子.在市区平原地势的公园和绿地,人为干扰较大,土壤呈碱性,苔藓植物种类以小羽藓属、真藓属和丛藓科为主;而在海拔较高的丘陵地区,人为干扰较小,土壤呈酸性,苔藓植物种类相对丰富,侧蒴藓类和苔类较多.对47种土生苔藓植物进行生态位宽度计测,多数苔藓植物的生态位宽度较窄.其中,东亚拟鳞叶藓的生态位宽度最大(0.3510),广泛分布在西湖西南的丘陵地区;平叶毛口藓和细叶小羽藓的生态位宽度次之,分别为0.2239和0.2185,是市区平原地势的公园和绿地中的常见种.At the 21 sampling sites in urban area of Hangzhou, 47 species of soil-born bryophytes belonging to 31 genera and 22 families were recorded. Based on the ecological importance value of these species and the data of ecological factors at the sampling sites, the relationships between the distribution of the bryophytes speocies in urban area of Hangzhou and related ecological factors were studied by canonical correspondence analysis. The results showed that human disturbance and soil pH were the most important factors determining the distribution of the bryophytes. In urban parks and green lands where human disturbance was greater, soil pH was alkali, and the species were mainly belonging to the genera of Haplocladium and Bryum and the family of Pottiaceae. In hilly area where human disturbance was lesser, soil pH turned to acidic, and the bryophytes were more, with pleurocarpous mosses and liverworts being relatively rich. The niche width of the 47 bryophytes was calculated, which revealed that most of them had very narrow niche width （〈 0. 1 ）. The Pseudotaxiphyllum pohliaecarpum widely distributed in the hilly area of southwest Xihu Lake had the widest niche width （0. 3510）, followed by Trichostomum planifolium （0. 2239） and Haplocladium microphyllum （0. 2185 ） , the commonest species in the parks and greenlands in urban area of Hangzhou.

关 键 词：苔藓植物 生态因子 典范对应分析 生态位宽度 杭州市区 

分 类 号：Q948[生物学—植物学]