So it sounds like palm trees are out competing elephants, rhinos, orangtangs, etc, merely by tasting good.
If the gaia worshipers want to do some real good, they would develop some delicious food products made from elephants, rhinos, etc, and figure out a way to mass farm them.
The corralary to that is that Pandas must taste really bad.... if they tasted good, there would be billions of them.