Today, in our environmental science lecture, we're discussing the impact of urban development on local wildlife. A recent study in Melbourne focused on the effect of city parks on bird populations. Surprisingly, researchers found that while larger parks supported more species, smaller parks attracted a greater number of individual birds per hectare. This is because smaller green spaces often provide dense shrubs and diverse food sources, which appeal to common species like sparrows and magpies. However, rare species, such as the powerful owl, were only observed in parks larger than 50 hectares. The study suggests that city planners should prioritize a mix of both large and small green areas to maximize biodiversity.
❓ What did the study in Melbourne reveal about smaller city parks?
A. A. They support more bird species than larger parks.
B. B. They attract a higher number of individual birds per hectare.
C. C. They are home to rare species like the powerful owl.
D. D. They have fewer shrubs and food sources.
✅ 正确答案
B. They attract a higher number of individual birds per hectare.