ALT At the top is an arrow pointing both left and right; text above the arrow reads mobility continuum and inside it reads swim and stall. To the left of the arrow is an illustration of a lake and to the right is soil. Below the lake section is a diagram of a bacteria’s path. Text in the top left corner reads Tswim>>Tstall. Below is a swim (run) pattern, colored with black and purple dots, then a stall (tumble) pattern colored with purple and gray dots. A color bar below shows time with lower values in black and higher in gray. A scale bar below shows 20 microns. On the soil side is a second bacterial path. The top left corner is labeled Tswim<<Tstall. The path is labeled stall (prolonged tumble) in purple and dark green, then swim (truncated run) in light green. Another color bar is shown with green instead of black and the same scale bar. Below, text reads Governing factors: apparent tumble frequency Ftumble and tumble failure probability Pfail.

ALT At the top is an arrow pointing both left and right; text above the arrow reads mobility continuum and inside it reads swim and stall. To the left of the arrow is an illustration of a lake and to the right is soil. Below the lake section is a diagram of a bacteria’s path. Text in the top left corner reads Tswim>>Tstall. Below is a swim (run) pattern, colored with black and purple dots, then a stall (tumble) pattern colored with purple and gray dots. A color bar below shows time with lower values in black and higher in gray. A scale bar below shows 20 microns. On the soil side is a second bacterial path. The top left corner is labeled Tswim<<Tstall. The path is labeled stall (prolonged tumble) in purple and dark green, then swim (truncated run) in light green. Another color bar is shown with green instead of black and the same scale bar. Below, text reads Governing factors: apparent tumble frequency Ftumble and tumble failure probability Pfail.