Floor joist notched for anchor bolt on sill plate – GreenBuildingAdvisor

Just to give a flavor for the loads involved:

That looks to be a 2×10, which can span about 14′, so each end is holding up 7′ of it. Residential floors are usually designed for a dead load (think empty) of ten pounds per square foot and a live load of forty pounds (full of people) per square foot additional. With 16″ spacing, 7′ of joist holds about 9 square feet of floor, or 90 pounds dead load and 450 pounds live load.

The limiting factor for wood bearing on wood is the ability of the wood to withstand crushing, which is about 2000 pounds per square inch, so you’d need about a quarter square inch to support the end.

Since the dead load is only 90 lbs you should be able to put a pry bar under the joist and lift it. It should also work to hammer wedges under it to raise it.