Exercise 2 solution

Sample summary: "A 2017 systematic review found that most studies conclude managed bees negatively affect, or could negatively affect, wild bees through competition, changes in plant communities or pathogen transmission. However, it found competition has little evidence of causing wild bee population declines, the effect through plant communities remains speculative, and pathogen transmission is well evidenced but its effects are not well understood. Many studies were not long-term or did not measure direct effects, so the review called for more studies measuring wild bee reproductive success or abundance."

Keys: both the worrying statement and the cautions appear; nothing is stated as proven beyond what the review says.