Invasive Species Impact and Characteristics

The video discusses the concept of invasive species, focusing on marine examples like the European green crab and lionfish. It explains how these species are introduced to new environments, often through human activities, and the characteristics that make them successful invaders. The video highlights the ecological impact of these species, such as the lionfish's effect on the Gulf of Mexico and Caribbean reefs, and emphasizes the need for awareness and research on lesser-known invaders.

What is an invasive species?

• A native organism that thrives in its original habitat

• An organism introduced to a new area that causes harm

• A species that is endangered in its natural habitat

• A species that is beneficial to its new environment

How did European green crabs first arrive in North America?

• As pets released into the wild

• Through intentional introduction for aquaculture

• Through natural migration

• As stowaways on wooden ships

What is the primary way boats contribute to the spread of invasive species?

• By providing food for invasive species

• By carrying invasive species in their ballast water

• By creating waves that help invasive species move

• By transporting invasive species in cargo holds

Why are ocean invaders like the green crab successful in new environments?

• They require specific habitats to survive

• They have a short lifespan

• They are very selective eaters

• They can adapt to a wide range of conditions

How many eggs can a female green crab release at a time?

• Up to 10,000

• Up to 100,000

• Up to 185,000

• Up to 50,000

Which invasive species became a problem in Florida after escaping from aquariums?

• European green crabs

• Lionfish

• Zebra mussels

• Asian carp

What impact did lionfish have on the Gulf of Mexico and the Caribbean?

• They improved the health of coral reefs

• They decimated fish populations

• They were quickly eradicated by predators

• They had no significant impact

What is a common characteristic of many marine invasive species?

• They are usually native to the areas they invade

• They are well-known and heavily researched

• They are often unknown and unnoticed

• They are always beneficial to their new environments