rotting

[Wjames]

The crack in her ancient voice
repeats, echoing in the hollow
of her trunk, blanketed in soft green.
Her dents cave in, collapsing.
Crumbles gather in the cracks;  cracks seems too sharp a word a word for a rotting corpse/tree. It would be softer and mushier in my opinion.
microbes clamber through the litter.
She was once an upright bastion,
now millions crawl through
her splayed and broken corpse. 

I like how it could be both a human corpse, or a fallen tree.

It might just be me, but this poem sort of made me smile. Is this rotting really a bad thing? Now there are millions of living creatures here, it's more alive than ever!

Hell, the rotting corpse/tree is blanketed in soft green - sounds peaceful enough to me.

If this upbeat interpretation was your intention, you might want to add a few more hints to make it a little clearer. If not, it doesn't matter, because I like my interpretation of the poem.