PCB 2033 Chapter 16 Quiz
Which description is true for most communities?
A few species are common and the remainder are rare.
Which statement best describes a keystone species?
A rare or uncommon species that has a strong effect on its community.
The species within a guild are unlikely to interact with one another.
False
Who was Aldo Leopold?
a conservationist
The layer of a forest in which decomposition takes place and mineral nutrients are released for reuse by plants is called the
forest floor.
Which of the following is considered a guild?
insect-feeding birds
Within a food web, herbivores are considered to be
intermediate species.
Which is the most dominant species?
largest in number, most relative biomass, and/or highest in relative abundance
What might be a result of hunting sea otters to extinction for their fur?
loss of kelp beds
Dominant species tend to be more abundant than other species because they
outcompete other species.
The species at the top of the food web
prey on other species and are not subject to predation.
The goal of restoration ecology is to
return the community to its pre-disturbance condition.
Which of the following groups of species represents a guild?
species of birds that feed on nectar
When an ecologist compares the diversity of different communities by counting the number of species within each community, the measure of diversity being used is called
species richness.
A food web is more complicated than a food chain.
True
Among the array of species that make up a community, not all are equally abundant.
True
Dominance is the converse or opposite of diversity.
True
Ecologists use a variety of useful sampling and statistical techniques for delineating and classifying communities.
True
The organismic concept views communities as clusters of species associating together as an interacting, integrated component.
True
The species within a community interact with one another directly or indirectly.
True