Green Crabs and Their Impact on Maine's Ecosystem

The video discusses the invasion of green crabs in Maine, highlighting their impact on the ecosystem and economy. Originally from Europe, these crabs threaten shellfish populations and vegetation. The video explores historical patterns, research findings, and potential solutions to mitigate their effects. It emphasizes the need for collective action to protect Maine's marine ecosystem.

What is the origin of the green crabs that are now threatening Maine's ecosystem?

• Africa

• South America

• Europe

• Asia

Which native crab species are caught for their meat in Maine?

• Jonah and Rock crabs

• Soft shell and Jonah crabs

• Rock and Green crabs

• Green and Jonah crabs

What was the economic value of soft shell clams in Maine in 2012?

• $25.7 million

• $10.5 million

• $15.6 million

• $20.3 million

What percentage of clams disappeared in Brunswick since 2011 due to green crabs?

• 30%

• 40%

• 50%

• 60%

Which marine plant, vital for juvenile lobsters, is being destroyed by green crabs?

• Seaweed

• Coral

• Eelgrass

• Kelp

What is the potential future threat of green crabs to Maine's most prized fishery?

• Lobster

• Tuna

• Cod

• Salmon

What historical period saw a surge in green crab numbers due to warmer winters?

• 1920s

• 1990s

• 1950s

• 1970s

What is the name of the more aggressive and cold-tolerant hybrid crab species?

• Arctic crab

• Polar crab

• Fjord crab

• Schwan crab

How have the new invaders adapted to survive cold winters?

• By hibernating on land

• By developing thicker shells

• By burrowing into salt marshes

• By migrating south

What is the main message of the conclusion regarding the green crab invasion?

• To ignore the problem

• To rely on natural cycles

• To take action and collaborate

• To focus on other marine issues