Once you die, all bodily functions cease. Just like your neurons stop firing, your powers will also immediately stop. We decompose just like any other living thing. It's unlikely that your corpse would have any impact on the liminality of the plants, bacteria, insects and animals that fed on it.

Some Liminals have unique physiology that might require extra caution, but I don't think that would be the case for you. We won't know for sure until you die, obviously, but ideally that won't be anytime soon.

Can I ask what brought this on?