Fully booked at the bottom of the sea: There seems no room for new bacteria on sand grains | Max-Planck-Gesellschaft https://www.mpg.de/17234041/fully-booked-at-the-bottom-of-the-sea-there-seems-no-room-for-new-bacteria-on-sand-grains
Bacteria on the sand on the ocean floor do not change between the seasons. Presumably, there is simply no room for change.
the Max Planck Institute for Marine Microbiology in Bremen