Bacteria will do that if you give them a good nutrient source.

In the case of terra preta, the only possible nutrient sources are primary and secondary.

With the wet basements at the library, the mold has probably found a nutrient source in Sheetrock.

It is often recommended that grass clippings be left on the lawn as a nutrient source.

Females without this additional nutrient source are significantly less picky.

The proportion of vitamin E to other tocopherols in a nutrient source varies greatly.

"Don't overtire them but I hear you found some possible nutrient sources on your latest trek?"

This is thought to be a result of the reduction in sebum, a nutrient source for the bacteria.

Tendrils like gentle blue fingers reached up, touched his legs, and apparently decided that he had no potential as a nutrient source.

Most northern forests rely on a thick layer of decomposing organic matter as their primary nutrient source.