广州城市绿地系统景观异质性分析

选用景观多样性等7个指数对广州城市绿地景观异性质进行了分析.结果表明,广州绿地斑块密度和绿廓道密度分别为11.8和1.87km·km^-2,在老城区绿地具有斑块小,破碎度大,多样性高,以随机分布为主的高异质性空间结构;在新城区,绿地斑块大,以均匀分布为主,因此,在同等大小的区域内,这类绿地空间结构更能提高景观的异质性,更有效地发挥绿地的生态功能.

Landscape heterogeneity of urban vegetation in Guangzhou

Seven indexes were used to study the landscape heterogeneity of vegetation in Guangzhou City.The results show that the patch density was 11.8 patches·km^-2 and the line corridor density was 1.87km·km^-2.In old urban area,the vegetation landscape was characterized by small patches,heavy fragmentation,high diversity and random distribution,showing a highly heterogeneous spatial pattern, while in new urban area,the vegetation landscape was characterized by big patches and even distribution.Therefore,when the size of vegetation area was the same,the even distribution of vegetation could improve the landscape heterogeneity and make the ecological function more effective.