**AWARDS ISSUED PRIOR TO JANUARY 20, 2025, WERE FUNDED UNDER PREVIOUS ADMINISTRATIONS AND MAY NOT REFLECT THE PRIORITIES AND POLICIES OF THE CURRENT ADMINISTRATION.** MANAGED HONEY BEES (APIS MELLIFERA) HAVE BEEN WIDELY INTRODUCED OUTSIDE THEIR NATIVE RANGE. WHEN ABUNDANT, HONEY BEES CAN COMPETE WITH WILD BEES FOR SCARCE POLLEN AND NECTAR RESOURCES AND SPREAD VIRUSES TO WILD BEE POPULATIONS. MOUNTING EVIDENCE SUGGESTS THAT VIRUS SPILLOVER AND RESOURCE COMPETITION HAVE THE POTENTIAL TO NEGATIVELY IMPACT WILD BEE FITNESS. HOWEVER, WE LACK A CLEAR UNDERSTANDING OF WHEN AND WHERE NEGATIVE FITNESS IMPACTS ARE LIKELY TO OCCUR, LIMITING OUR ABILITY TO INFORM POLICY REGARDING THE MANAGEMENT OF HONEY BEES ON PUBLIC LANDS. SUCH INFORMATION IS ESPECIALLY TIMELY BECAUSE BEEKEEPERS ARE INCREASINGLY INTERESTED IN PLACING HIVES ON STATE AND FEDERAL LANDS, BUT CONSERVATION GROUPS WORRY THAT NON-NATIVE HONEY BEES COULD ENDANGER IMPERILED NATIVE BEE SPECIES. THIS RESEARCH PROJECT WILL COMBINE A SERIES OF MANIPULATIVE EXPERIMENTS AND FIELD SURVEYS TO ASSESS HOW HONEY BEE COMPETITION AND VIRUS SPILLOVER IMPACT WILD BEE FITNESS. IT WILL ALSO INVESTIGATE WHETHER INCREASING FLORAL ABUNDANCE AND REDUCING HONEY BEE VARROA LEVELS INDIVIDUALLY AND INTERACTIVELY REDUCE NEGATIVE FITNESS IMPACTS. THIS STUDY WILL ADVANCE SCIENCE BY IMPROVING OUR UNDERSTANDING OF BEE COMPETITION AND DISEASE TRANSMISSION. IT WILL ALSO PROVIDE PRACTICAL RECOMMENDATIONS TO BEEKEEPERS INTERESTED IN INCREASING THE SUSTAINABILITY OF THEIR OPERATIONS AND INFORM POLICY DECISIONS REGARDING HONEY BEE MANAGEMENT ON PUBLIC LANDS.