In the United States, we think of termites as pests, because they can destroy our homes. However, in Africa, they are anything but pests. Instead, they are “soil engineers” that make their surroundings more hospitable for other organisms. How do they accomplish this? By building their homes, which we call termite mounds. As Dr. Todd Palmer (an ecologist at the University of Florida in Gainesville) puts it:1
These mounds are really the supermarkets of the savanna.
How do termite mounds become “supermarkets of the savanna”? It’s because of the engineering prowess of the termites. If the soil is too sandy to make their mounds, the termites add clay to it. If the soil has so much clay that it is difficult to excavate, the termites add sand to it. Either way, they end up making the soil more ideal for plant growth. In addition, the engineered soil helps the mounds hold onto water more efficiently. Indeed, when an African savanna goes through a dry spell, most of the plants turn brown. However, the plants that grow in and around the mounds remain green.
Not only do termite mounds help retain water, but they also enrich the soil with chemicals that are necessary for good plant health. Studies show that the soil in and around a termite mound has significantly more nitrogen and phosphorus in it than soil that is far from a termite mound. Those nutrients end up producing benefits in plants that grow up to 5 meters away from the mound!2
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