what is the philosophy behind ecodiversity careing?

Answer 1

This is as much science as philosophy. The basic idea is that diversity in any complex system generally lends vitality and longevity to the system. A network of diverse elements is like adding "depth" to a sports team. If your team's success depends on the health and vitality of one player, or just a few players, then your team can easily take a nose-dive if those players get hurt, or whatever. It's the "too many eggs in one basket" concept. Having more balance/diversity makes the team more consistently powerful over the long run. The brain works in a similar way. You can loose a bunch of brain cells without losing intelligence, etc., because the complexity/diversity of brain cells and brain subsystems add redundancy – critical systems have backups to backups to backups…. A diverse ecosystem works like a good sports team or a healthy brain in this respect. With the extinction of each species, we lose part of the complexity that makes the ecosystem stable and healthy over the long run. If we manage to kill off too many species, we increase our risk of an ecosystem collapse – meaning that a run-away chain-reaction could cause even more species to die – leaving only some of the most hardy to survives, which would mostly likely be mostly insects, plants, and microorganisms.

I would like to add that this applies to social systems too, which is why societies should respect and nurture diversity religious views, preferences, lifestyles, etc. A lack of diversity leads to lack of creativity, which leads to stagnation and an overall inability to adapt to change. One thing you can count on in life is on-going change, so living systems and social systems must either be creative and adapt, or they die.