Quips and Quotes
News and Notes
Human activities . . . entail significant . . .
consequences for one or more biodiversity components, primarily by redirecting matter and
energy flows. This cumulative redirection is enormous at the planetary scale (Vitousek et
al. 1997), as the following three examples illustrate: (1) Vitousek et al. (1986)
calculated that 40% of the Earths terrestrial primary productivity was being
appropriated by humans; (2) Roberts (1997) estimates that 25-35% of the primary
productivity of continental shelf marine ecoystems is consumed by humans; and (3) Postel
et al. (1996) report that humans now appropriate 26% of total evapo-transpiration and use
54% of all runoff in rivers, lakes, and other accessible sources of water.
It is the way of the world that some people put errors into circulation while others
try then to eradicate these same errors. This keeps everyone busy . . . (Arni Magnusson)
We had seen the light at the end of the tunnel, and it was out (John C. Clancy)
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