Might care to look at 'bell' graph of similar dirty water bag organisms living in closed ecosystems.

The wonderful thing about a terrarium is that it is a virtual closed ecosystem.

Apple's war on Flash was solely to keep its closed ecosystem.

I just don't know that there's room for another closed ecosystem in this space.

I don't know how easy it is to get the license to make the hardware, but the software side of course is a closed ecosystem.

The closed ecosystem of the cave was so stable that it couldn't handle the appearance of humans.

Really, an Apple product trying to push to a closed ecosystem?

Nutrients have a greater effect on the fairly closed ecosystem that exists along the coast than they have in open sea areas.

Judging by sales, consumers don't seem to be bothered by the closed ecosystem.

Q. Can you give an example of what you mean by "closed ecosystem?"