Identify Stresses
Where are aquatic populations stressed?
These four maps show the distributions of known stressors that
affect native aquatic species. The maps are meant to give you an
example of what can be displayed.
Note that the geographic distribution is different for each
variable. Each of these stressors has a different source, is
controlled by different factors (precipitation, air flow patterns,
agricultural practices, etc.), and results in a different spatial
pattern. As we will see on the next page, vulnerability increases in
areas which are affected by more than one of the stressors.
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