Question

Why waterdroplet is also considered as ecosystem??

Answer 1

It is considered ecosystem because of several populations residing around and probably inside it.Like the air particles having dust leaf litter debris

Answer 2

An aquatic ecosystem is a group of interactive organisms dependent on one another and their water environment for nutrient and shelter.Even a drop of water in an aquatic ecosystem , since it contains or can support living organisms.
I Hope it will help you (According to my knowledge. I had given.)