Even though this is not an ecosystem let's just pretend that this the worlds biggest ecosystem ok? 71% of the world is water and a lot of animals live in this ecosystem like fish,shark,whales and more!
Ugh! Now my shirt is wet!
Thanks, tom *ahem* *whispers* I have no idea who this guy is
But anyway this is a forest/taiga (aka the colder version of a forest) and well.... there are many names for this. But any way I think that this is the biggest ecosystem. Well if you excuse me I will continue eating my apple