Exam 47: Species Interactions, Communities, and Ecosystems

A mature collection of species, called a _____, makes up the final stage of succession.

An ecosystem includes:

A species' fundamental niche:

Imagine that a scientist takes a group of Anolis lizards and introduces them into an enclosure at a research facility in continental South America. He notes that the lizards thrive in this new environment. The fact that Anolis lizards could survive in habitats outside of the Caribbean is a reflection of their _____ niche; their _____ niche is determined by predation and resource availability.

Benefits associated with symbiotic relationships might include all of the following EXCEPT:

The sum total of the populations that live in a given area is called a(n):

Which type of interaction is NOT antagonistic?

Which of the following would NOT be expected to affect primary production?

A _____ depicts the flow of carbon through an ecosystem, whereas a _____ depicts the transfer of energy.

Primary producers are the basis for all aquatic and terrestrial food webs. How does the amount of primary production affect community structure?

You decide to plant a garden in your backyard. You dig up a strip of grass in a sunny spot. When you have finished digging up the grass, but you haven't planted anything, you have created a(an) _____ in the lawn.

The role played by a species in its environment is called its:

Sea stars, otters, and beavers through their influence on prey populations and habitat modification are considered _____ species.

When lichens grow on bare rock, they may eventually accumulate enough organic material around them to supply the foothold for later rooted vegetation. These early pioneering lichens can be said to do what for species arriving in a later successional stage?

The volcanic oceanic island of Krakatoa is located in Indonesia. In 1883, this island experienced a massive volcanic explosion that killed most of the plants and animals living on the island. After a very, very long time period of recovery from the eruption, which group of organisms would we expect to have the MOST representation among native species on the island?

Consider the food web shown in the figure below. If steelhead were removed from the web, what would you predict to happen to the numbers of chironomid midges?

When both participants in a species interaction develop adaptations in direct response to one another, in the long term this could progress into:

Symbiotic relationships between species do not change over time.

How many kilograms of biomass at the primary producer level would be required to support 20 kilograms of biomass at the tertiary consumer level?

Energy flow through ecosystems can be depicted using a(n):