摘 要(英文)：An extensive investigation on the plant species naturally growing on the building roofs of Guangzhou city was conducted in 2003. We found 128 vascular plant species in total, which belong to 49 families and 108 genera. The habitat condition of these plants was distinguished into three types based on the degree of pollution. The results showed that more species occurred in less pol- luted roof environment. One hundred and eleven species were found in the slightly-polluted roofs, 73 in the moderately-polluted roofs, and 21 in the severely-polluted roofs. Our results also showed that the number of species lived in building roofs increased with the species richness of the nearby environment. Compared with the plants living on the ground, roof plants had shorter stems, smaller leaves, more and longer roots, and higher root-shoot ratios. It indicated that roof plants have developed a suite of morphological characteristics in order to adapt to the harsh environment. Based on the adaptive ability of these roof plants, 12 plant species were
recommended as the prior choices for roof gardening in Guangzhou city.
广州市不同环境屋顶自然生长的植物多样性分析