Impact of Rock Snot on Ecosystems

The video discusses species extinction, focusing on introduced and invasive species. It highlights the impact of global travel on species distribution and provides examples like earthworms and rats. The case study of rock snot, an algae affecting river ecosystems, is explored, questioning its status as an invasive species. The video emphasizes the challenges in environmental science, such as the need for more knowledge and the urgency to act on environmental issues.

What is a major cause of species extinction according to the video?

• Climate change

• Introduction of species to new locations

• Overpopulation

• Natural disasters

What term is used for species living outside their typical geographic range?

• Endemic species

• Native species

• Extinct species

• Introduced species

Why do invasive species expand rapidly in new environments?

• They require less food

• They are less adaptable

• They can outcompete native species

• They have more predators

Which of the following is an example of an invasive species mentioned in the video?

• Bald eagle

• Kudzu vine

• Polar bear

• Giant panda

What is the common name for the algae didymo?

• Green algae

• Rock snot

• Blue-green algae

• Seaweed

What adverse effect does rock snot have on river habitats?

• Increases fish population

• Enhances recreational activities

• Improves water clarity

• Changes species composition

What hypothesis is being explored about rock snot's presence in rivers?

• It is a newly introduced species

• It is a beneficial species for rivers

• It is a native species affected by pollution

• It is a result of climate change

What pollutants are suggested to influence the growth of rock snot?

• Carbon dioxide and methane

• Lead and mercury

• Nitrate and phosphorus

• Sulfur dioxide and nitrogen oxide

What is a challenge in environmental science as mentioned in the video?

• Too much funding

• Lack of interest in the field

• Inability to conduct experiments

• Lack of a baseline for comparison

What approach is suggested if rock snot is found to be a native species?

• Regulating pollution

• Increasing fishing activities

• Preventing boat transfers

• Introducing more species