I'm not sure that it would be a working definition for the biotech industry, but I think that understanding biological processes and how we use biological processes within our agricultural frameworks could be considered biotechnology. We've done that in a variety of ways over the lifetime of agriculture as humans. We constantly watch ecological systems and the interactions between different biological components, and we understand how they work and how they can benefit us, from grazing cattle to growing plants to adapting seed varieties. I think there is lots of potential for other kinds of biologically oriented technologies that use an understanding of biological systems to better allow us to benefit from interactions that already exist in ecological systems.
That's probably not what you were looking for.