5 Questions for Peter Singer (Part 1)

We invited The Life You Can Save (www.thelifeyoucansave.org/) supporters to ask Peter Singer questions. Peter answers our favorite five in this video:
1. "How could a sixteen-year-old student, with no income, contribute towards The Life You Can Save?" ~ Tom Cartwright (via Twitter) [00:15]
2. "How do you feel about the 'Poor Meat-Eater Problem'?" ~ Peter Hurford (via Twitter) [01:10]
3. "A sufficiently discouraging possibility would be a child whose life is saved only to live another 50 years with problems which preclude any contentment." ~ Charles Spohr (via email) [02:42]
4. "In light of other disasters, such as the Hurricane Sandy Superstorm, I'm wondering if a donation to the American Red Cross, for example, for disaster relief, would be in the spirit of the pledge." ~ Ann Howard (via email) [04:04]
5. "Where do I set the limit to my actions? Would I have to travel all around the world and try to save ALL the 'drowning children'?" ~ José Oliveira Stor Zé (via Facebook) [06:22]

[@noooreally]

I have a question. Is maintaining animal biodiversity or preventing extinction inherently good. In addition things like captive breeding programs to reintroduce species into the wild or killing invasive species are these ethical because they allow us to stop species from going extinct. I can see an argument for those animals integral to ecosystems thus other animals will suffer if they go extinct, but if this is not a factor would it be Ethical?