It seems you're asking about the dispersal of "atap", but there isn't a biological or ecological term that matches this exactly. It's possible there's a misunderstanding or a typo.

Here are some possible interpretations and their dispersal methods:

* "Atap" as a shortened version of "atap palm" (Arenga pinnata): This palm species disperses its seeds primarily through animals, particularly mammals and birds. The fleshy fruit of the palm is consumed by animals, and the seeds are then deposited in their droppings, facilitating dispersal.

* "Atap" as a reference to a specific type of plant or seed: If you could provide more context about what "atap" refers to, I might be able to provide a more precise answer.

* "Atap" as a misspelling: If "atap" is a misspelling of another term, please provide the correct spelling so I can assist you further.

Please clarify what you meant by "atap" so I can give you the best possible answer.