Today in our environmental science lecture, we're discussing the impact of urban development on local wildlife. A recent study in Melbourne found that when green spaces are replaced with buildings, bird species diversity drops by nearly 40%. However, the study also noted that planting native trees and shrubs in parks can mitigate this effect. For example, areas with at least 30% native vegetation retained most of their original bird populations. Interestingly, the research showed that introduced species, like sparrows, actually increased in urban areas, but they don't provide the same ecological benefits as native birds. So, the key takeaway is that careful planning of urban green spaces is crucial for preserving biodiversity.
❓ メルボルンの研究では、鳥類の種の多様性に関してどのようなことが判明しましたか？
A. A. 緑地が建物に置き換えられたとき、40%増加した。
B. B. 緑地が建物に置き換えられたとき、それは約40%減少した。
C. C. 在原有树木被种植的情况下，它保持不变。
D. D. それは、在来植生が30%未満の地域でのみ減少した。
✅ 正确答案
B. It dropped by nearly 40% when green spaces were replaced with buildings.