{"refrec":{"BRefID":255484,"RR":"<b>Brotz, L.; Cheung, W.W.L.; Kleisner, K.; Pakhomov, E.; Pauly, D.</b> (2012). Increasing jellyfish populations: trends in Large Marine Ecosystems. <i>Hydrobiologia 690(1)</i>: 3-20. <a href=\"http://dx.doi.org/10.1007/s10750-012-1039-7\" target=\"_blank\">http://dx.doi.org/10.1007/s10750-012-1039-7</a>","BEntID":247488,"PublicFlag":1,"CheckedFlag":1,"wosflag":1,"vabbflag":1,"RefStringPartII":". <i>Hydrobiologia 690(1)</i>: 3-20. <a href=\"http://dx.doi.org/10.1007/s10750-012-1039-7\" target=\"_blank\">http://dx.doi.org/10.1007/s10750-012-1039-7</a>","DocTypID":8,"DocType":"Journal article","MarineFlag":1,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Brotz, L.; Cheung, W.W.L.; Kleisner, K.; Pakhomov, E.; Pauly, D.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Brotz, L. <i>et al.</i>","Englishabstract":"Although there are various indications and claims that jellyfish (i.e., scyphozoans, cubozoans, most hydrozoans, ctenophores, and salps) have been increasing at a global scale in recent decades, a rigorous demonstration of this has never been presented. Because this is mainly due to scarcity of quantitative time series of jellyfish abundance from scientific surveys, we attempt to complement such data with non-conventional information from other sources. This was accomplished using the analytical framework of fuzzy logic, which allows the combination of information with variable degrees of cardinality, reliability, and temporal and spatial coverage. Data were aggregated and analyzed at the scale of Large Marine Ecosystem (LME). Of the 66 LMEs defined thus far that cover the world’s coastal waters and seas, trends of jellyfish abundance after 1950 (increasing, decreasing, or stable/variable) were identified for 45, with variable degrees of confidence. Of those 45 LMEs, the majority (28 or 62%) showed increasing trends. 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