Natural Selection and the “rare enemy effect”. Earthworms #1 enemy is the mole A mole can eat its weight in worms in a day A worm knows a mole is coming.

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Presentation transcript:

Natural Selection and the “rare enemy effect”

Earthworms #1 enemy is the mole A mole can eat its weight in worms in a day A worm knows a mole is coming by “hearing” its feet thumping

Other organisms eat worms Sea Gulls perform “foot paddling behavior” Brings worms to the surface Wood turtles stomp, brings up worms BUT Turtles and seagulls do not eat as many worms as moles, so worms behavior has not changed.

Humans can worm grunt Apalachicola Forest Drive a stake into the ground in the forest Rub top with a piece of steel called a rooping iron

Video clip: Worm grunting Sopchoppy FloridaVideo clip: Worm grunting Sopchoppy Florida Video Clip: Worm grunting: Science behind itVideo Clip: Worm grunting: Science behind it