Compiled, Scribed, and Edited
Robert Jan "Roy" van de Hoek, RC

Ballona Institute
322 Culver Blvd., Suite 317
Playa del Rey, California 90293
(310) 821-9045

Ernest Callenbach's Species Definition
When we talk about ecological interactions, we're usually talking about relationships among members of different animal and plant species...

Fossils show us that species are not fixed; they evolve. Over a period of millions of years, certain land-dwelling mammals evolved into dolphins or whales. Sometimes species "split" in EVOLUTION, with groups of members diverging into different patterns. There are also evolutionary cases in which originally quite different species have converged toward similar forms.

Knowing species names give us a precise vocabulary for recognizing and discussing them. It's much more fun to identify that sociable bird with its lovely trickling song as a linnet than merely as "that pinkish bird."

Robert Jan "Roy" van de Hoek


Species are very important and I hope that a careful reading of the defintion of SPECIES has lead you also to a better understanding of the definition of SUSTAINABILITY by Ernest Callenbach.