Ecology Mock Regents.Part A

What is the carrying capacity of the following graph?

• 1000
• 8000
• 800
• 600

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In the year 1865 the rabbit population seems to soar above the lynx (bobcat) population.  What might be a cause for this?

• a disease hit the lynx population
• the rabbits ran out of food
• the lynx may have stopped eating rabbits altogether
• the rabbit population got a disease

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The presence of wastes, such as plastic bags and motor oil, in lakes and streams miles away from developed areas suggests that

• ecosystems are interconnected and human action can alter ecosystem equilibrium.
• recycling programs have failed to conserve biotic resources.
• natural processes can alter ecosystem stability.
• direct harvesting practices have led to irreversible destruction of ecosystems.

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The presence of wastes, such as plastic bags and motor oil, in lakes and streams miles away from developed areas suggests that

• ecosystems are interconnected and human action can alter ecosystem equilibrium.
• recycling programs have failed to conserve biotic resources.
• natural processes can alter ecosystem stability.
• direct harvesting practices have led to irreversible destruction of ecosystems.

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NGSS.MS-ESS3-4

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When fertilizers run off farmland into streams and ponds, the nitrogen content of the water increases. This can lead to rapid growth of algae in a process called eutrophication. How can this process affect other organisms in the water?

• Oxygen is used up as algae is decomposed, reducing the amount available to other organisms.
•  The water becomes better able to support aerobic organisms.
•  The algae provide food for fishes and other organisms, leading to decreased algae populations.
• The extra nitrogen provides additional food for the other organisms, increasing their population.

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A strip mining company wants to lease some land that is currently part of a national park. They promise to reclaim the land should any minerals be mined from the area, and they are willing to pay top dollar for the rights. As an ecologist, what factors would you raise with the local government?

•  the threat to local biodiversity
• management of the land after the company leaves
•  the new jobs that would be created
•  the increased traffic in the area

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NGSS.MS-ESS3-4

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Which item is a biotic limiting factor for humans?

• Ebola
• space
• fresh water
• hurricanes

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How can humans ensure that ecosystems are healthy and remain healthy?

• limit habitat destruction
• increase biodiversity
• remove invader species
• all of the above

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An example of invasive species are ________ because they _________.

• dogs in your house; sleep in your bed 
• ticks; drink blood from their hosts
• dandelions; crowd out space where grass could grow
• hyenas; consume the remains of dead animals

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A farmer hires a spraying service to treat his corn field with herbicide. That same evening, it rains over 3 inches.  The herbicide ends up in a nearby pond.  What part of the food web will be impacted first?

• consumers
• decomposers
• producers
• prey

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