Composition, distribution and habitat effects of vascular plants on the vertical surfaces of an ancient city wall
Composition, distribution and habitat effects of vascular plants on the vertical surfaces of an ancient city wall
复制标题
古城墙垂直面维管束植物的组成、分布及生境效应
DOI：
10.1007/s11252-016-0528-2
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发表时间：
2016-06-01
期刊：
影响因子：
2.9
通讯作者：
Xu, Chi
中科院分区：
文献类型：
--
作者：
Qiu, Yanning;Chen, Bin J. W.;Xu, Chi
墙壁的垂直表面容纳了城市地区的各种植物。确定生长在这些生境中的植物的种类组成和分布，对于更好地理解和管理城市生态系统具有重要意义。在这里，我们重点介绍了南京城墙，这是世界上最大、保存最完好的砖石古城墙之一。通过详细的实地调查，采用典型对应分析和多元回归模型，研究了CWN上维管植物的种类组成、丰富度和盖度，以及它们与当地生境因素(包括坡向、位置、墙高和地面植被状况)的关系。我们在CWN上总共发现了67种植物。它们大多是分布广泛的野生植物，藤本植物的比例非常高。令人惊讶的是，我们发现所调查的生境因素与物种组成、物种丰富度和植物盖度的相关性一般较弱(R2<；约10%)。在生命形式和种子传播特征方面，这种关系在不同的物种群中指定时仍然很弱。然而，这些物种群体似乎对特定的微生境条件有不同的反应，如光照和人类活动的强度。我们的结果为保护围墙和加强其相关植被的生态系统服务提供了有益的启示。
The vertical surfaces of walls accommodate diverse plants in urban areas. Characterizing species composition and distribution of plants growing in these habitats is of great significance towards a better understanding and management of urban ecosystems. Here we focused on the City Wall of Nanjing (CWN), one of the biggest and best reserved ancient masonry city walls in the world. Through detailed field survey, we investigated species composition, richness and cover of the vascular plants on the CWN, and examined their relationships with a set of local habitat factors including aspect, position, height of the wall and ground vegetation status, using canonical correspondence analysis and multiple regression models. In total we found 67 plant species on the CWN. They are mostly widespread ruderal plants, with a conspicuously high proportion of vine species. Surprisingly, we found that the investigated habitat factors generally have weak correlations (R2< 10 %) with species composition, species richness and plant cover. The relationships remain weak when specified in different species groups in terms of life forms and seed dispersal traits. However, these species groups appear to have distinct responses to particular micro-habitat conditions such as light and intensity of human activities. Our results provide useful implications for protecting the walls and enhancing ecosystem services of their associated vegetation.