The researchers collected more than 100 ant samples, representing 21 species, at dozens of sites on sidewalks, street medians and parks in Manhattan. The ant samples were then analysed to determine the isotope content of their bodies.
The researchers collected more than 100 ant samples, representing 21 species, at dozens of sites on sidewalks, street medians and parks in Manhattan. The ant samples were then analysed to determine the isotope content of their bodies.