福州城市绿地斑块景观结构和异质性分析

对福州城区绿地生态系统景观结构和异质性进行了分析,结果表明,附属绿地数量最多,占城区绿地斑块总数的87.35%,但面积只占城区绿地总面积的14.60%;其它绿地的数量最少,但面积却占到了城区绿地总面积的31.82%;防护绿地只有25块,但面积却也占到了城区绿地总面积的23.81%.福州城区绿地生态系统斑块大小其它绿地和防护绿地平均值较大,分别达到326.2和29.30 hm2;公园绿地和生产绿地斑块平均值次之,分别是10.87和9.30 hm2,但斑块大小变化范围较大;而附属绿地斑块平均值最小,斑块大小变化范围也相对较小.总得来说,各类型的各级斑块在面积上的变化比块数上的变化要大得多.其它绿地多样性指数最低,次低的是生产绿地,最高的是附属绿地.优势度在福州城区的5个区的不同绿地中都比较小.相比之下,附属绿地的分布最为均匀.绿地分布不均衡,应加强土地规划,同时造林绿化,优化生态环境,建造具有本城区特色的景观斑块和廊道.

Structure and heterogeneity of urban vegetation landscape in Fuzhou

The structure and heterogeneity of urban landscape in Fuzhou city were studied in this paper,the results showed that the most vegetation patches were Attached Greenbelets,account for 87.35% of the total vegetation patches,but their area was only 14.60% of the total vegetation area.The least were Other Greenbelt,but their area was 31.82% of the total vegetation area.Although Green buffers had only 25 patches,their area account for 23.81% of the total vegetation area.In items of the size of the patches,the average area of Other Greenbelt and Green buffer were 326.24 and 29.30 hm~2 respectively,while that of Public Park and Nursery was 10.87 and 9.30 hm~2,respectively.However,the number of the former two was small and the range of the latter two was wide.The average area of Attached Greenbelet was the smallest,and the range of area was narrow,too.On whole,the change of area is much more larger than the change of number in all kinds of the vegetation patches.Other Greenbelt had the lowest and Nursery had the second lowest index of landscape diversity while Attached Greenbelet had the highest one.In the five districts of Fuzhou city,all types of vegetation had a small landscape dominance and the distribution of Attached Greenbelet was the most average.There was somewhat imbalance in the location of different vegetation patch types.It's suggested that the design of land should be strengthened and more trees should be planted in order to optimize the environment and to build the landscape patches and corridors with the characteristic of the urban itself.