Change in populations
暂无描述。系统推荐的高质量记忆内容，适合每天坚持背诵学习。
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What 4 factors affect population size?
• Birth rate • Death rate • Immigration • Emmigration
Think about how the environment impacted the Monarch butterfly population in both the winter habitat and the summer habitat.
Winter: * habitat loss * deforestation and urban dev. Summer: * less resources for monarchs when they arrive and for reproduction. * feed almost exclusively on milkweed
Why might it be important to protect the migration habitats for migrating animals?
It’s important to protect these habitats, otherwise many populations of animals wouldn’t have anywhere else to survive on until they return; they’ll die.
Specifically thinking about the Monarch butterflies, how did the population stay relatively stable despite the catastrophic event in the late winter/early spring in their winter habitat location?
Increase of milkweed growth caused a boom in monarch butterflies’ population during the summer.
What kinds of factors can cause habitat loss for animals?
• Humans • Natural disasters
Is it true that chemicals, like pesticides, only impact the organisms that are directly sprayed?
No. Once in the air, pesticides can move to water bodies, non-target organisms, nearby crops, or soil. This can cause direct or indirect damage.