. California fish and game. Fisheries -- California; Game and game-birds -- California; Fishes -- California; Animal Population Groups; Pêches; Gibier; Poissons. BIOREGIONS: A PROPOSAL FOR CALIFORNIA 101 Investigators with a focus at opposing ends of this space-time continuum might have difficulty communicating with one another without a common understanding of how these apparently divergent biological processes are related hierarchically. In fact, the lack of such an integrated overview might explain why ecologists and historical biogeographers often seem to be talking past one another (Blond
. California fish and game. Fisheries -- California; Game and game-birds -- California; Fishes -- California; Animal Population Groups; Pêches; Gibier; Poissons. BIOREGIONS: A PROPOSAL FOR CALIFORNIA 101 Investigators with a focus at opposing ends of this space-time continuum might have difficulty communicating with one another without a common understanding of how these apparently divergent biological processes are related hierarchically. In fact, the lack of such an integrated overview might explain why ecologists and historical biogeographers often seem to be talking past one another (Blondel 1987, Brooks 1988). This same integrated overview is invaluable when considering the formation, establishment, and turnover (, the dynamics) of the spatially explicit biotic assemblages that constitute the contemporary natural communities of the planet. Biomes, Ecosystems, Provinces, Communities, Assemblages, and Associations: Real Biological Entities or Constructs of Convenience? The biological layer of the planet has been subdivided innumerable ways by phytogeographers and zoogeographers (see introduction, and Holdridge 1947, 1967, Dice 1952,Shelford 1963,Kuchler 1964,Udvardy 1975, Bailey 1976). Most of these subdivisions are based on the geography of vegetation cover which is somewhat more fixed in space than are animal species. At least that is how it appears in ecological time. The reality is that plants, over generations, shift spatially (, Axelrod 1977). Given that fact, how real can a spatially explicit assemblage of plant species actually be? The plant species composition can change with climatic and geologic changes and the species themselves can change (, evolve) into new organisms. Even at the fine end of the time scale, the question of whether a plant community is a group of interdependent organisms, or is actually comprised of many forms whose individual ranges are LOCAL ECOGEOGRAPHIC FORMATIONS. REGIONAL TEMPERATURE CYCLES Scale: Landscape and mac
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