Fig. 1

A Location of the Pedregal de San Angel, in Mexico City. B Original extension of the Pedregal and location of the PSAER (2020), C Sampling sites in the PSAER, noted as white polygons
A Location of the Pedregal de San Angel, in Mexico City. B Original extension of the Pedregal and location of the PSAER (2020), C Sampling sites in the PSAER, noted as white polygons