Exam 16: Community Structure

Which is the most dominant species?

Which of the following has the highest species richness? A community with

Which description is true for most communities?

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

An organismic concept of communities was developed by

Which statement best describes a keystone species?

Within a food web,herbivores are considered to be

Dominant species tend to be more abundant than other species because they

Within a community,a group of species that carries out similar functions or exploits the same resource is called a(n)________.

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

When a single or a few species are most prevalent in a community,the species are called ________.

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

Some aquatic communities are defined by physical features of the abiotic environment rather than by the dominant organisms.

In a sandy beach community,ghost crabs and beach flies occur within

Species composition does not usually differ much within a local area,such as between a hilltop and a stream bottomland.

In a well-stratified lake,the thermocline refers to a steep and rapid decline in temperature relative to the waters above and below.

In a forest community,the upper layer is called the ________.

The goal of restoration ecology is to

A species that has massive effects on an ecosystem but in proportion to its abundance is a

The garter snake in this diagram is an example of a(n)