One part of explaining the mysterious disappearance of Daphnia was explained to my satisfaction in my last posting. Hydra eat Daphnia in the close confines of an aquarium because they almost never see one another in nature. Daphnia hasn’t evolved any defenses to a predator it never sees. The fascinating part of that solution is [...]
Archive for September 3rd, 2008
The solution revealed. 2.
Posted in Ecology, Environment, tagged Daphnia, Hydra, Simocephalus, vernal pools on September 3, 2008 | Leave a Comment »
The solution revealed. 1.
Posted in Ecology, Environment, tagged Daphnia, Hydra, predators, prey, Simocephalus on September 3, 2008 | Leave a Comment »
The simple observation that the Daphnia had disappeared while the Hydra and Simocephalus increased in population size actually contains three stories involving each of the possible pairs: Daphnia-Hydra, Simocephalus-Hydra, and Daphnia-Simocephalus. The common element in the stories is the role of the physical structure of the habitat. At the scale of a human it is [...]
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