Comparison of the Reproductive Phenology of Evergreen Forest Trees

ABSTRACT: In an evergreen forest at Doi Suthep-Pui National Park, Chiang Mai Province, ten tree species were observed for their phenology, monthly between March 2020 and February 2021: Baccaurea ramiflora, Acronychia pedunculata, Macaranga denticulate, Michelia baillonii, Morus macroura, Aphanamixis polystachya, Cryptocarya amygdalina, Ficus macrocarpa, Garcinia mckeaniana, and Styrax benzoides. By comparing the data those of a previous study in the same area performed in 1995-1998, changes in reproductive phenology patterns were revealed in 5 of the species: Baccaurea ramiflora and Ficus macrocarpa began to flower later than in the past. Michelia baillonii, Morus macroura and Styrax benzoides began flowering earlier than in the past. Data on changes in phenological behaviour may be useful to adjust optimum seed-collection times to prepare planting stock to restore degraded areas.