Exam 20: Landscape Dynamics

Subpopulations within a metapopulation are isolated from one another with no movement of individuals between subpopulations.

The ________ mosaic view of the landscape considers landscapes as composed of multiple patches or communities,each in a different phase of successional development due to disturbances.

Wind and moving ________ are two powerful agents of disturbance.

A(n)________ species lives within the borders of a habitat patch,avoiding edges where habitat change is abrupt.

The patchwork of different types of land cover is called a(n)________.

The study of the causes and ecological consequences of spatial patterns on the landscape is called ________.

Fire is a human-caused disturbance that is not a natural part of ecosystems.

Habitat corridors are usually of human origin.

Animals can function as agents of disturbance.

Habitat corridors have two roles: providing a unique habitat for some plant and animal species and providing a means of dispersal between larger patches of habitat.

Edges along landscape patches that are caused by disturbances and are subject to successional changes over time are called ________ edges.

Within a mosaic,a(n)________ is a relatively homogeneous community type,differing from its surroundings in both structure and species composition.

As a patch increases in size,the ratio of interior to edge increases.

Which of the following statements is true?

The greater the contrast between two adjoining habitat patches,the greater is the diversity of species living along the border between the two patches.

Plants adapted to edge environments tend to be

An inherent edge of a patch

Butterflies move more frequently between habitats connected by corridors than between unconnected habitats.

Selection cutting is a more severe disturbance to a forest ecosystem than clear cutting.

The scale of a disturbance is measured by the mean number of disturbances that occur within a specific time interval.