| Popis: |
Ecology texts often imply that natural biomes represent steady-state dynamics in terms of relatively stable populations of organisms that interact in terms of the flow of energy and matter. But nature is unpredictable and patchy in space and time at all scales. The turbulent water masses of the sea can, at a small scale, show heterogeneity such as accumulations of bacteria around algal cells (Blackburn et al. 1998; Blackburn and Fenchel 1999), and such accumulations may in turn be depleted by bacterivorous protozoans. Likewise, short-lived local algal blooms occur that in turn become depleted by accumulating protozoa. Protozoa thus live a “feast and famine existence” (Koch 1971). |
