Reforestation of the northeastern U.S., for example, has led to the emergence of Lyme disease by encouraging the proliferation of white-tailed deer, which transport ticks that harbor the Lyme bacterium.

• 例如在美国东北部，人工造林使得白尾鹿繁殖较多，造成莱姆病的出现，因为白尾鹿会传播带有莱姆病细菌的蜱。