{"refrec":{"BRefID":62730,"RR":"<b>Rossi, F.; Herman, P.M.J.; Middelburg, J.J.</b> (2004). Interspecific and intraspecific variation of δ<sup>13</sup>C and δ<sup>15</sup>N in deposit- and suspension-feeding bivalves (<i>Macoma balthica</i> and <i>Cerastoderma edule</i>): evidence of ontogenetic changes in feeding mode of <i>Macoma balthica</i>. <i>Limnol. Oceanogr. 49(2)</i>: 408-414","BEntID":59366,"PublicFlag":1,"CheckedFlag":0,"wosflag":1,"vabbflag":null,"RefStringPartII":". <i>Limnol. Oceanogr. 49(2)</i>: 408-414","DocTypID":8,"DocType":"Journal article","MarineFlag":1,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Rossi, F.; Herman, P.M.J.; Middelburg, J.J.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Rossi, F. <i>et al.</i>","Englishabstract":"Deposit and suspension feeders can switch feeding behavior and show variations in feeding mode as individuals pass through life-cycle stages. Stable carbon and nitrogen isotopes were used to trace changes in diet of the tellinid bivalves <i>M. balthica </i>facultative deposit feeder) and <i>C. edule</i> (obligatory suspension feeder), according to their size class. Analyses of variance showed differences in the δ<sup>13</sup>C between the species. <i>C. edule</i> showed a diet composed of microphytoplankton, whereas <i>M. balthica</i> could feed on a mixed diet of microalgae from benthos and plankton. Values of δ<sup>13</sup>C depended significantly on body size in <i>M. balthica</i>, providing evidence of ontogenetic variation in diet with small juveniles feeding entirely on microphytobenthos, while there was a gradual tendency for larger sizes to feed more on microphytoplankton. Therefore, although these species rely on different sources of food, large animals of <i>M. balthica</i> can overlap the trophic niche of <i>C. edule</i>. 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