Arrangement & Interspersion
Managing for areas with multiple successional stages
within a landscape is called interspersion. Some
species obtain all their habitat requirements from only
one successional stage, but many wildlife species need
more than one successional stage to provide all their
habitat requirements. Usually, greater interspersion
in an area results in a greater variety of wildlife.
Here’s another example. Below are two areas
of land. A is the section that
is an old field, B is shrubs, C is
young woodlands, and D is mature woodlands. Of
the two land areas, which has higher interspersion? Mouse
over the correct diagram to find the
answer.
Here’s another way to assess interspersion using
an “interspersion index” principle. This
can be done using aerial photographs by counting the
number of times the habitat changes along an imaginary
north-south line across the widest part of the area,
then along the widest east-west line. Next, add
these two numbers together to get an interspersion index
value. Compare this value with other areas. The
higher the value, the better for quail, rabbits, and
other wildlife species that like areas with high interspersion.
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