{"refrec":{"BRefID":354437,"RR":"<b>Libralato, S.; Christensen, V.; Pauly, D.</b> (2006). A method for identifying keystone species in food web models. <i>Ecol. Model. 195(3-4)</i>: 153-171. <a href=\"https://dx.doi.org/10.1016/j.ecolmodel.2005.11.029\" target=\"_blank\">https://dx.doi.org/10.1016/j.ecolmodel.2005.11.029</a>","BEntID":352150,"PublicFlag":1,"CheckedFlag":0,"wosflag":1,"vabbflag":1,"RefStringPartII":". <i>Ecol. Model. 195(3-4)</i>: 153-171. <a href=\"https://dx.doi.org/10.1016/j.ecolmodel.2005.11.029\" target=\"_blank\">https://dx.doi.org/10.1016/j.ecolmodel.2005.11.029</a>","DocTypID":8,"DocType":"Journal article","MarineFlag":1,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Libralato, S.; Christensen, V.; Pauly, D.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Libralato, S.; Christensen, V.; Pauly, D.","Englishabstract":"Keystones are defined as relatively low biomass species with a structuring role in their food webs. Thus, identifying keystone species in a given ecosystem may be formulated as: (1) estimating the impact on the different elements of an ecosystem resulting from a small change to the biomass of the species to be evaluated for its ‘keystoneness’; and (2) deciding on the keystoneness of a given species as a function of both the impact estimated in (1) and its own biomass. Experimental quantification of interaction strength necessarily focus on few species, and require a priori assumptions on the importance of the interactions, which can bias the identification of keystone species. 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