I've been reading some of the literature around Lovelock and Watson's famous Daisyworld earth-system model. It is a simple non-linear system of ODEs that illustrates various interesting principles in control theory and ecology/biology. In quite a few places I find references to another interesting-sounding model formulated by William Hamilton and Peter Henderson: Damworld.

Imagine Damworld as a basin ringed by mountains, in which a single species of algae lives. The rain that falls into Damworld can leave only through one narrow outlet. Living in the outlet are creatures that feed on the algae. These creatures anchor themselves to the sediments and tend to build up a dam, like coral polyps build up a reef. The third species is one that breaks down dams for food. If the dam rises, the lake behind it swells, creating a larger supply of sunlight-warmed, nutrient-rich water in which various organisms thrive.

(From Oliver Morton's 1999 article, "Is the Earth Alive?")

Question: Are there any published accounts of the Damworld model?

I've been unable to find anything beyond simple descriptions of Damworld, such as the one above.

(Note: I'm perfectly capable of coding my own version of Damworld - but I'd like to read about the original one.)


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