Most science and philosophy seems to be rooted in a stream of time, evolutionary framework. Posited truths are inductive, and open to alterations.
Other modes of reasoning – metaphysical – are open to, or dependent upon, truths rooted in faith or belief. Deductive and fiercely resistant to change.
Ecosystems can be understood as a mix of both facts and faith. The facts upon which we operate are the gifts ecosystems provide: the matter we need to survive. The faith comes via the way matter is brought to our attention – via qualia.
A sensual impression or an idea strikes, and if we have the wherewithal to play with it, to experiment with it, other impressions and ideas coalesce around it, drawing us to it. We get what we need. That is faith gravitas.