Exam 17: Community Structure

The simplest measure of community structure is a count of the number of species present and is referred to as species ________.

Which of the following groups of species represents a guild?

A species that has a disproportionate impact on a community,relative to its abundance,is called a(n)________ species.

In a rank-abundance curve comparing two communities,the community with the greater species richness is characterized by a

A food web is more complicated than a food chain.

In a food web diagram,groups of species that derive food energy from a similar source are called ________ levels.

In aquatic habitats,the upper zone of water where the availability of light supports photosynthesis by phytoplankton is called the ________ zone.

The species at the top of a food web

Among the array of species that make up a community,not all are equally abundant.

A ________ diagram plots each species in a community,beginning with the most abundant and ending with the least abundant,along the x-axis,with the corresponding value of relative abundance on the y-axis.