1、 中文 4473 字 本 科 外 文 翻 译 绿色景观规划的基础设施 Green Infrastructure for Landscape Planning 学 部（院）： 建筑与艺术学院 专 业： 环境艺术设计 学 生 姓 名： 学 号： 指 导 教 师： 完 成 日 期： 2015/4/10 1 Chapter Three Ecosystem functions and health Maintaining biological diversity One of several goals of the following chapters is to show how to mainta
2、in or enhance biodiversity at the landscape and municipal level through the use of green infrastructure. Maintaining biodiversity is a challenge, since many species are negatively impacted by human activity or require large territories. In fact, some species require huge territories virtually undist
3、urbed by humans in order to sustain viable populations (Figure 3.11). For example, grizzly bears occupy overlapping home ranges, but their density in the Yellowstone ecosystem is about one bear per 34 square miles.20 Other species are extremely sensitive to human presence and activity (Figure 3.12).
4、 For these species, a country residence in the forest can reduce the presence of these species for as much as 600 feet into the forest.21 2 Figure 3.12 The hermit thrush (Catharus guttatus) is a forest interior species and highly sensitive to human presence and activity. Its presence is reduced arou
5、nd country residences in the forest for as much as 600 feet. In contrast, many species do adapt to the presence of people and the land-use changes they establish. Some species seem to adapt to fragmentation of their habitat. The scarlet tanager is an interior forest bird, but it seems to breed in fo
6、rest fragments less than 25 acres (10 ha) in size when its preferred interior habitat is diminished.10 Some species, such as crows, are even considered completely urbanized and flourish in cities even to the point of becoming pests, as is the case with rats and cockroaches. Biological diversity within urban areas can be higher than it is with
