These were the barriers I kept coming up against": How an ecologist-turned-manager documented the scientific obstacles to MPA management, and his advice to improve the situation December 15, 2017 Three years ago, Chris Cvitanovic and a team of researchers published a study that found that only 14% of the information cited in MPA management plans was from primary scientific sources " from journals, in other words. Read more about These were the barriers I kept coming up against": How an ecologist-turned-manager documented the scientific obstacles to MPA management, and his advice to improve the situation