Are we (humans) part of the ecosystem?

Yes.

This is why it is important to keep the ecosystem in a state that will continue to support us. This is what so many scientists and climatologists are worried about. They fear we are changing the ecosystem to a point where it will not support humans.

the Environment, is changing. It can never be ruined as such, as the earth will continue to exist even after we are all gone. But it's ability to support human life, to us, is the important thing.

We are absolutely part of the ecosystem.

An ecosystem includes all the living and nonliving parts of the environment. We don't always make the effort to fit in without disrupting the rest of the ecosystem, but we are members of the animal kingdom and part of many ecosystems.

Yes, but it applied more when we were hunter-gatherer tribes. Then you could calculate over and under population by the balance of natural resources. As agrarian societies, we more or less create our own ecosystems.

Yes. Just as soon as we step foot in the ocean.

yes

absolutely yes!

of course

heck ya... homo sapiens is an animal just like any other.