Ficus microcarpa grows in various habitats from rocky sea coasts, limestone hills to mountain forests. In Peninsular Malaysia, its main natural habitat was behind mangroves on river banks which the flow and water level are influenced by tides. Most of these places have been cleared for agriculture.

Ficus microcarpa is pollinated by wasps, are: Blastophaga saundersii (known from India) and Blastophaga verticilliata (known wasps pollinating from Hong Kong, Sumatra and Phillipines).

The plant is dispersed trough defecation by birds, primates and bats. The plant produces fruit throughout the year. As such, jejawi plays as a critical food source for the vertebrate communities. The density of vertebrates depends often to the abundance of figs and planting fig-trees in degraded area for obtaining an efficient measure to support wildlife. 
Young leaves of Ficus microcarpa has been reported as the preferred folivorous diet of the proboscis monkey in Klias Peninsula, Sabah.

Roots can stabilize slopes because they grow vigorously over the soil surface and help to prevent soil erosion.

Ficus microcarpa (Moraceae)