Biodiversity Sustainability, Food Web Watershed 2

What is true about sustainability?

• Having a small number of species increases biodiversity

• Sustainability is how organisms change over time

• Sustainability is how much rainfall and sunlight an ecosystem receives

• The more different types of species you have (biodiversity) the better an ecosystem can sustain itself

Biodiversity refers to

• extinct species
• the variety of species on Earth
• nonrenewable resources
• the rate of species decline

When biodiversity increases

• Sustainability decreases

• Sustainability remains the same

• Sustainability also increases

• Sustainability becomes greater by 2

What is the difference between biotic and abiotic?

• Biotic are non-living things
• Abiotic are living organisms
• Biotic is life,
  Abiotic is non-living
• Biotic is non-living, Abiotic is living

A rain forest ecosystem is characterized by high biodiversity and a warm/rainy climate. How might this impact the ecosystem's sustainability if the ecosystem is damaged by a catastrophic event?

• The ecosystem, because it has few plant and animal species, will experience low sustainability, not allowing it to recover

• The ecosystem, because it has many plant and animal species, will experience high sustainability, allowing it to recover

• Biodiversity does not have an impact on an ecosystem's sustainability

Students in a science class visited four local ecosystems. The students observed the species present in each ecosystem and recorded their observations in the table.

Based on these observations, which ecosystem is likely to be the LEAST sustainable?

• A. Ecosystem 1, because it has the fewest species.

• B. Ecosystem 2, because it includes both aquatic and terrestrial species.

• C. Ecosystem 3, because it has few predators.

• D. Ecosystem 4, because it supports many animals.

The food webs below model relationships among the organisms in two ecosystems.

Which ecosystem would be more likely to survive if a disease killed the grasses?

• A. The forest ecosystem, because most of the animals can eat other organisms.

• B. The grassland ecosystem, because several predators compete for food.

• C. The forest ecosystem, because it has three top predators.

• D. The grassland ecosystem, because it has many herbivores.

a deer population has significantly increased, the best hypothesis is 

• the deer's main predator has been eliminated
• competition increased
• decreased water levels of local ponds
• organisms that rely on similar food sources migrated to the area

Which event is the best example of competition between species in a pond?

• dragonflies landing on lily pads
• lizards and snakes lying in the sun
• hawks eating mice
• frogs and toads eating flies

Which relationship describes predator/prey

• hawks and shrubs
• mountain lion and deer
• frogs and trees
• grasses and crickets