Live like you are dying
Decreased deaths lead to...
What is an increase in population?
All the living and nonliving things interacting in a particular area
What is an ecosystem?
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Even when a population size stays the same, this is always happening to the organisms within it.
What are births and deaths?
In a simulation, a student decreases the predator population of weebugs. Explain what should happen to the weebug population and why.
What is the weebug population will increase because there will be fewer deaths from predation?
Increased deaths lead to...
What is a decrease in population?
When two or more populations use the same resource, such as the same food source
What is competition?
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Explain why two populations that do not eat each other could still affect each other's size.
What is through competition for the same resource population?
Two species of plankton-eating fish live in the same ocean region. If one species suddenly decreases due to disease, what is likely to happen to the other species, and why?
What is: The other species is likely to increase because with less competition, more of the shared resource—plankton—is available to support its survival and reproduction?
A stable population will have this...
What are the same number of births and deaths?
A group of the same type of organisms living in the same area
What is a population?
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This kind of effect occurs when a population size changes due to a change in a population not directly connected to it on the food web.
What is an indirect effect?
If the zooplankton population increases and the sea turtle population decreases, what simultaneous effect would this likely have on moon jellies?
An increase in moon jelly births and a decrease in moon jelly deaths, leading to population growth.
Increased births lead to...
What is an increase in population?
A population that eats organisms from another population
What is a consumer population?
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This is the reason why organisms must eat or store glucose before reproducing.
What is to release energy from energy storage molecules needed for reproduction?
Why might the moon jelly population stay stable even if more energy is available from zooplankton?
Because an increase in predators like sea turtles could raise the number of deaths, balancing out the births.
Decreased births lead to...
What is a decrease in a population?
The result of one cause leading to an effect that causes one or more other effects
What is indirect effect?
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If the number of furbils increases in an ecosystem, what is likely to happen to the weebug population, and why?
What is the weebug population will decrease because the larger furbil population needs more energy and eats more weebugs?
In an ecosystem, the furbil population suddenly doubles. Predict and explain the short-term and long-term effects this could have on its resource population and on the furblis themselves.
What is, in the short term, the resource population will decrease because more furblis are eating it. In the long term, if the resource population gets too low, furblis may not have enough energy storage molecules to survive and reproduce, causing their population to decline too.