The book's primary worth is that it reveals the differences of view about bioregionalism in this global era. See my latest essay in Landscape Journal on this subject. Culturally speaking, various modes of simulation, mimicry, dance, local knowledge, ritual and other symbolic forms of social, political and ecological interaction have historically shaped various forms of bioregional living or practice. The work of Paul Shepard is most useful here. And the work of Beck, which I believe you imply here.
Local knowledge can be a form of bioregional knowledge.
Perhaps bioregionalism should be thought of as a consilience of representations of the sciences and sensibilities. The work of Luke and other political ecologists is useful here. The terms of order are deeper than the day can comprehend. Where I live, the geography of the past includes a rich natural and cultural history. A watershed is a watershed even if stripped clean of biota, but such a system has very little cultural or ecological significance.