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After 4 months of phenology observation in primary forest adjacent to our restoration site, this month is said to be the peak of the fruit season in the primary forest in Gunung Leuser National Park of the Leuser Ecosystem, Sumatra. Phenology observation is aimed to record the appearance of young leaves, flowers and fruits in the primary forest. Our Botany Specialist and Forest Restoration Manager, Rio Ardi, suggested that there are several species of fruit trees that were favored by mammals such as Sumatran orangutans, macaques, gibbons and Thomas leaf monkey. These tree species include Cempedak hutan (Artocarpus integer), Durian (Durio carinatus), Perawan china (Baccaurea parviflora), Asam Kumbang (Mangifera sp), Asam Kandis (Garcinia celebica) and Kruing (Dipterocarpus tempehes).

 

The result of our phenology survey will be a good reference for our restoration team to collect seeds from the primary forests. These seeds will be cultivated in our tree nursery to make seedlings that will be planted in our restoration site, part of the Gunung Leuser National Park of the Leuser Ecosystem. Most of the collected seeds are from slow-growing species and preferred by many animals. Currently, from 185 of observed trees as the mother trees, 120 species are identified as source of orangutan food.