In today's lecture, we'll discuss the impact of urbanization on local ecosystems. One key point is that while cities often reduce biodiversity, they can also create new habitats. For example, green roofs and vertical gardens support insects and birds that struggle in rural areas due to intensive farming. However, the success of these habitats depends on the choice of native plants. A recent study in Melbourne found that roofs with native grasses attracted three times more native bee species than those with exotic flowers. Surprisingly, the size of the roof mattered less than the plant diversity. Therefore, urban planners should prioritize plant variety over sheer green space.
❓ 根据讲座内容，墨尔本那项研究的关键发现是什么？
A. A. 更大的绿色屋顶总是能支持更多的蜜蜂种类。
B. B. 本土植物在吸引本土蜜蜂方面比外来植物更为有效。
C. C. 外来花卉比本土草本植物吸引了更多的本土蜜蜂。
D. D. 屋顶面积是影响蜜蜂多样性的最重要因素。
✅ 正确答案
B. Native plants were more effective than exotic ones in attracting native bees.