Exam 5: Biodiversity, species Interactions, and Population Control

The ability of a living system to survive moderate disturbances is called ____.

Grasslands have a high resilience and therefore can recover quickly following a fire.

Humans compete with many other species for space,food,and other resources.

A population increases through birth and ____.

Use the figure above to answer the following question(s). -What happens to a population if a dieback occurs,and which portion of the graph represents this?

What is succession that begins in an area where an ecosystem has been disturbed,removed,or destroyed,and that contains soil or bottom sediment?

When populations of two different species interact over long periods of time,changes in the gene pool of one species can lead to changes in the gene pool of the other.What is this called?

From the ____ point of view,parasites are harmful,but from the ____ perspective,parasites can promote diversity.

The non-poisonous ____ butterfly gains protection by looking like the bad-tasting ____ butterfly,which is a protective device known as ____.

In _______________,two species behave in ways that benefit both by providing each with needed resources.

One of the factors determining the rate of succession is _______________,in which one set of species makes an area suitable for other species with different requirements.

At the present time the global human population surpasses seven billion people.If we exceed the carrying capacity of the earth,the human population may suffer a substantial collapse. Consider the following formula for population change: population change = (births + immigration)- (deaths + emigration) What will be required of humans in order to stabilize or reduce our population?

Organisms with clumped distributions are fairly rare.

Exponential growth followed by a steady decrease in population growth until the population size stabilizes is typical of ____.

Which of the following has caused the population of the southern sea otters to fluctuate?

If the resilience of a damaged ecosystem is low enough,the degraded area may not be restored by secondary succession.When this happens,the damaged ecosystem has reached ____.

What is the most common distribution of populations?

What was the primary reason the southern sea otter nearly went extinct by the early 1900s?

Kelp forests are composed of large concentrations of a(n)____.

Too much or too little of any physical or chemical factor can prevent the growth of a population,even if all other factors are at or near the optimum conditions.What is this ecological principle?