Mount St. Helens

The video explores the 1980 eruption of Mt St. Helens, highlighting the massive destruction it caused. It then shifts focus to the natural recovery process, emphasizing the role of lupin in soil formation and the challenges posed by invasive weevils on Sitka willow growth. The video concludes with insights into the ongoing ecological balance and potential future changes.

What was the primary cause of the massive destruction during the 1980 eruption of Mt St. Helens?

• A vertical explosion

• A horizontal explosion

• A volcanic ash cloud

• A series of earthquakes

Which plant species played a crucial role in the initial recovery of the Mt St. Helens landscape?

• Douglas fir

• Western hemlock

• Lupin

• Sitka spruce

How do lupin plants contribute to the ecological recovery of the area?

• By attracting pollinators

• By preventing erosion

• By creating new soil

• By providing shade

What is the main threat to the growth of Sitka willow plants in the recovering ecosystem?

• Poor soil quality

• Invasive weevils

• Lack of sunlight

• Excessive rainfall

What role do insects play in the ecosystem recovery process at Mt St. Helens?

• They provide nutrients

• They help in pollination

• They influence plant survival

• They act as predators