Extended Data Fig. 4 | Characteristics of forest islands. a, Photograph of the
anthropic landscape dotted with forest islands in the Barba Azul nature
reserve. b, Histogram showing the distribution of the diameter of forest
islands. The left side of the distribution is truncated at 25 m because smaller
forest islands have not been mapped. c, Photograph taken at site 579, a natural
forest island. Samples are taken every 10 cm, from top left (highest sample) to
bottom right (deepest sample). Material is silt with no organic matter.
d, Photograph taken at site 425, an anthropogenic forest island. The depth from
which the sample was taken is 140 cm. e, Photograph taken at site 430, an
anthropogenic forest island. The depth from which the sample was taken is
160 cm. Samples in d, e are representative of the whole profiles of sites 425 and
430, respectively (Extended Data Fig. 7). We obtained one core for each forest
island that we visited.