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CynthiaW's avatar

Today’s special animal friend is the fungus-cultivating termite Macrotermes michaelseni, a keystone species of the Okavango Delta. Over many centuries, these insects and other termite species were responsible for building up islands in the wetlands, allowing for the growth of trees and the creation of a more diverse ecosystem than would otherwise have existed. The termites’ mound may be 13 feet high above the ground and cover over 500 square feet of area, beneath which are the subsurface chambers and passages. These may be the largest structures not built by humans.

https://www.youtube.com/watch?v=HGiDwN33WJo

The mound is made of clay mixed with the insects’ saliva, creating a solid, water-resistant surface. Inside, a million or more termites live, reproduce, and digest large quantities of grass, leaves, woody material, and elephant dung. Young worker termites chew up the vegetable material, digest and excrete it, and mold comb-like structures from their feces. In these combs, the fungus Termitomyces schimperi grow. These fungi break down the cellulose in the plant matter. Later, the termites eat the fungus-covered comb, passing the spores through their digestive tracts and helping the fungus to reproduce.

https://www.youtube.com/watch?v=afIqIpQ-vlY

Termite society includes workers, warriors, and reproductive individuals called “alates.” All the inhabitants of the colony are the offspring of the queen, who may produce hundreds of millions of eggs in her lifetime. Once per year, the current generation of alates – both male and female – fly from the mound. They go a fairly short distance, and when a young queen lands, she scrapes off her wings. If she is in proximity to male, the two dig into the ground and start making eggs. A queen will lay an egg every three seconds for 15 years, and she will grow from large-ant size to as big as your index finger. When a queen finally dies, the mound is usually abandoned.

https://www.youtube.com/watch?v=MO5Fd54Ap_k

Termite life requires high humidity and a constant temperature of 84-88 degrees. The mound superstructure helps to control the temperature: hot air rises from the underground chambers up a chimney in the center of the mound and is dissipated through an array of thin-walled passages near the surface.

https://www.youtube.com/watch?v=620omdSZzBs

Termites are an important food source in their ecosystem. People eat the flying alates when they emerge each year. So do frogs, spiders, wild puppies and kittens, and birds of prey.

There are other genera and species of termites in southern Africa, all involved in different kinds of decomposition and nutrient recycling. The Jwaneng Diamond Mine in the Kalahari Desert of Botswana was discovered because prospectors observed signs of diamond-containing clays, “Kimberlite,” in soil disturbed by termites over thousands of years.

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CynthiaW's avatar

Good morning. Crushing morosity for the win! Speaking of evil, over at the Mothership, a podcaster has an interview with Bill Ayers, an unapologetic terrorist. I guess when you're a celebrity, you can expect people to treat you as if you have something worth saying. I don't plan to listen.

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