Week 8: Refugee crises

How fire, drought and logging reshape mycorrhizal communities, and what "reallocation" can and cannot be taken to mean.

TB0815 · diorama S. Brandt, NHM Basel · CC BY 4.0

Dispatch 08

Date: 12 April 2027
Metaphor: Refugee crises — displacement and reallocation after a shock
Phenomenon: Shifts in mycorrhizal community composition and resource reallocation after fire, drought or logging disturbance

Outline

fire, drought and logging remove hosts and change soil chemistry, and the surviving fungal community shifts in composition, not only in size
some ectomycorrhizal taxa are fire-adapted early colonisers of regenerating seedlings; others disappear with their host and do not return quickly
surviving networks reallocate: carbon and nutrients concentrate toward whichever hosts remain connected — a redistribution along existing links, not a rescue directed at whoever needs it most
limit of the metaphor: “crisis” and “displacement” describe the pattern accurately; they do not license the claim that the network is tracking need, any more than week 3’s “aid” did