What will the effect be in a giant pandas is lost?

I would be very upset, they are my favourite animal. Bamboo may also take over the world.

What will the effect be in a giant pandas is lost?antispam

I take it that you mean "What will the effect be when giant pandas are lost?". If that is your question, it will be a loss of a great species. However, they problebly won't make a huge enviromental difference.