Vocabulary
Collecting and reprocessing materials to be used again
recycling
One constraint of solutions to maintain the health of ecosystems is –
A. It can be difficult to control species
B. It is sometimes difficult to regulate human activities
C. it is expensive
D. all of the above
all of the above
Describe how introducing a non-native species of a plant can reduce an area’s biodiversity over time.
Introducing a non-native species of plant can reduce the biodiversity of an area if clearing native species from the area is necessary; they can also reduce biodiversity if they damage or kill native species.
The ecosystem with the greatest biodiversity is the one that has the greatest:
A. variety of living things.
B. average annual rainfall
C. Coverage of land area
D. Elevation above sea level
Variety of living things
When there is high _________, many species of plants and animals can flourish.
biodiversity
Pertaining to land on Earth
terrestrial
What are some examples of human activities that can have big impacts on ocean ecosystems?
A. pollution
B. introduction of invasive species
C. fishing
D. all of the above
all of the above
What is the benefit of having a variety of pollinating birds and insects, and how could this service be harmed by changes in their population?
Insects and birds that help pollinate can benefit crop plants that depend on pollinators to produce food. Changes in their population could result in fewer pollinators and fewer crops produced for food.
Changes to an ecosystem’s biodiversity can have a direct effect on humans because humans –
A. inhabit all areas of the Earth’s ecosystems.
B. use minerals from the ground to make things.
C. rely mostly on solar power for energy.
D. depend on the Earth’s natural resources.
Depend on Earth's natural resources
The environment with the greatest biodiversity is the one with the greatest variety of __________.
organisms
The number of different species in an area
biodiversity
What is NOT an example of an ecological service that animals provide, which in turn helps Earth’s biodiversity?
A. dogs barking at intruders
B. bats, birds, and other insects eating mosquitos, which bite people and spread disease
C. snakes, foxes, and other predators eating pests like mice so they dont people's homes as much
D. insects such an insects, birds and bats pollinating flowers
dogs barking at intruders
What factor contributes the most to the overall health and sustainability of an ecosystem?
The overall health and sustainability of an ecosystem is largely determined by the diversity and large variety of organisms in the ecosystem.
Nitrogen pollution enters Earth’s freshwater resources from a variety of human activities, including the use of fertilizers and pesticides in agriculture. This nitrogen pollution has a negative effect on plants and animals living in fresh water. Certain wetland plants, however, are able to purify the water and restore it to its non-polluted state. Which of the following would most likely increase the negative effects of nitrogen pollution?
A. Using fertilizers that do not contain nitrogen
B. Loss of biodiversity in the wetlands
C. Increase of biodiversity in the wetlands
D. The introduction of a new species of plant
Loss of biodiversity in the wetlands
Changes in biodiversity can influence humans’ ________.
resources
To make free from pollutants and contaminants
purification
What ecological services do plants provide that help Earth’s biodiversity?
A. plants maintain the balances of gases in the air through photosynthesis, supplying oxygen for humans and animals.
B. plants are used to make many medicines used to treat diseases in people and animals
C. plants help slow the effects of weathering and erosion
D. plants provide all these ecological services
plants provide all these ecological services
How do humans benefit from ecosystems?
humans are a part of ecosystems. We use ecosystems for food, shelter, water, etc. We also contribute both negatively and positively to the health of ecosystems.
Human activity can destroy coral reefs. Because so many organisms depend on the coral, this can have a negative effect on the ecosystem in shallow ocean waters. Which of the following solutions will most likely offer the best way for humans to repair the damage and improve the health of this ecosystem?
A. Introduce non-native species into the shallow ocean that don’t depend on coral
B. Design nets to catch the kinds of fish that use coral reefs as a food source
C. Submerge large structures on which new coral reefs can form and grow
D. Use submarines to gather data on the amount of coral reefs lost each year
Submerge large structures on which new coral reefs can form and grow
Changes in biodiversity can influence humans’ resources as well as ___________.
ecosystem services
A system compromising of all the biotic and abiotic factors in an area and all the interactions among them
ecosystem
If there were fewer insects to pollinate plants on Earth, what would be the biggest concern for humans?
A. people who work for control companies might lose their jobs
B. honey could become more expensive
C. There would be fewer roses available on Valentine's Day
D. crops might not get pollinated, and there could be a food shortage
crops might not get pollinated and there could be a food shortage
If you cut down a forest for a housing development, what can you predict will happen to the overall health and sustainability of the ecosystem over time?
Removing organisms from an ecosystem decreases its sustainability and stability, leading to its decline
Ecosystem biodiversity is often used to measure an ecosystems
A. stress
B. health
C. resources
D. oxygen level
health
Explain how biodiversity affects humans.
Biodiversity affects humans' food, energy and medicines.