“…How ever, it has also been shown that the pro cess is con trolled by other en vi ron men tal pa ram e ters. Be cause foraminiferal Mg/Ca ra tios are con trolled by cal ci fi cation phys i ol ogy (Erez, 2003;Bentov and Erez, 2006), em pir i cal cal i bra tion stud ies are es sen tial to de ter mine the T sen si tiv ity, as well as the roles of any other con trib ut ing fac tors, such as salin ity (e.g., Nürnberg et al, 1996;Lea et al, 1999;Fer gu son et al, 2008;Kisakürek et al, 2008;Groeneveld et al, 2008;Duenas-Bohórquez et al, 2009;Hoogakker et al, 2009;Arbuszewski et al, 2010;Hönisch et al, 2013), car bon ate ion con cen tra tion (e.g., Rosenthal et al, 2006;Elderfield et al, 2006;Alison et al, 2010;Raitzsch et al, 2010), in or ganic diagenetic over print (e.g., Kontakiotis et al, 2011;van Raden et al, 2011;Boussetta et al, 2011;Sabbatini et al, 2011), and likely oth ers. It is nec es sary to pay close at ten tion on these envi ron men tal pa ram e ters, be cause in suf fi cient knowl edge of them can com pro mise use of foraminiferal Mg/Ca ra tios in confi dently re con struct ing past tem per a tures.…”