Environmental changes alter the composition of the bacterial community. The minority species become the majority, which is the very process of biological evolution. A somewhat similar occurs in the brain: Learning, experiences, damages, and sensory disruption often lead to big changes in the degree of brain cell recruitment.
バクテリア群は温度変化など環境が変わるとそれに応じて構成が変わり、それまで極マイナーだった種が多数派になる。まさに生物進化の起こる様子だけど、似たことは脳が学習したり損傷を受けたりしたとき脳細胞でも起こっている。こういう流動的な変化こそが生命現象の鍵だね
https://elifesciences.org/digests/80867/warming-awakens-slumbering-microbial-diversity