How do fruit bats disperse seeds in tropical rainforests?

Fruit bats play a vital role in the ecology of tropical rainforests by acting as essential agents of seed dispersal. They typically locate fruit-bearing trees by homing in on the specific scents of ripe fruit.123

Their dispersal methods generally fall into two categories based on seed size:

• Internal dispersal: When bats consume smaller fruits, they swallow the seeds whole. These seeds pass through the bat's digestive tract and are excreted intact while the animal is in flight, effectively spreading them across a distance from the parent tree.123
• External dispersal: For larger fruits, bats often transport the item by mouth to a temporary feeding roost located away from the source tree. At the roost, they chew the pulp thoroughly to extract the juice and then drop the remaining seeds, which helps the plant escape competition with the parent tree and avoid seed predators concentrated in the immediate area.123

In some cases, such as with the almendro tree, fruit bats work in tandem with other animals like agoutis to ensure successful germination.3