Chapter 10 ES

Biodiversity is best described as...

• the amount of different species of organisms (plants and animals) living in the same area.

• when only a few species inhabit an area.

• when only one organism (plants and animals) is found living in one area.

A species form that supports an entire ecosystem.

• Keystone Species

• Herbivores

• Umbrella Species

• Predators

Why are some sharks considered a keystone species?

• Because they are a top predator

• They scare off smaller fish that may overgraze an area of sea grass

• They are tertiary consumers

• They are cartilaginous

An animal that naturally preys on others.

• Keystone Species

• Predators

• Umbrella Species

• Herbivores

What is an invasive species?

• A native (naturally found) species which are added to an area. 
• A non-native (not naturally found) species added to an area. 
• A keystone species in an environment
• none of the above

What makes a species invasive?

• Moving to a new ecosystem and taking resources from natives

• Not having papers

• Species that can't adapt

• Plants that take up too much space

Hunting sea otters along the Pacific Coast resulted in

• an increase in biodiversity

• the extinction of kelp

• a decrease in biodiversity

• reduction in sea urchin population

A species that plays a critical role in the health, maintenance, growth, or definition of an ecosystem.

• keystone

• invasive

• engineer

• predator

Species that are native to and found only within a limited area.

• endemic

• exotic

• endangered

• extinct

A species at risk, but not yet endangered.

• endangered

• exotic

• endemic

• threatened