That is difficult to answer. I do not believe we are more important or superior, but we have been given or have evolved into capabilities that allow us to think and reason whereas most other life on Earth cannot. Therefore I believe we have a responsibility to all other life on the Earth (and in the Universe?) to live in harmony with all other life.
We are no more superior than the rest. Actually, I believe spiritually we are greatly inferior. They live in peace and harmony with the flow of nature and the spirits. We think we are above the flow of nature. We are too selfish and egotistical. Nature is more important.