6. LAW OF THE CONTINUUM 

The gamut of ecological niches, in a regional unit, permits a gradual shift 
in the qualitative and quantitative composition and structure of communities.
 

Regional units have niches,
And they run from tatters to riches.
Not for potato knishes, 
Nor for whirling dervishes,
But flesh and fowl and fishes.

Regional units have niches,
And they run from tatters to riches.
The gamut they provide
For those that there reside
Lets each community
Shift both in quantity
And quality besides.

Ever, ever so gradually:
Nature all this accomplishes! 
(All this no one admonishes.)