{"refrec":{"BRefID":392825,"RR":"<b>Galloway, A.; Schram, J.B.; Lowe, A.T.; Whippo, R.; Heiser, S.; Iken, K.; McClintock, J.B.; Klein, A.G.; Amsler, M.O.; Amsler, C.D.</b> (2024). Trophic stability and change across a sea ice cover gradient on the western Antarctic Peninsula. <i>Mar. Ecol. Prog. Ser. 735</i>: 43-61. <a href=\"https://dx.doi.org/10.3354/meps14575\" target=\"_blank\">https://dx.doi.org/10.3354/meps14575</a>","BEntID":390589,"PublicFlag":1,"CheckedFlag":0,"wosflag":1,"vabbflag":1,"RefStringPartII":". <i>Mar. Ecol. Prog. Ser. 735</i>: 43-61. <a href=\"https://dx.doi.org/10.3354/meps14575\" target=\"_blank\">https://dx.doi.org/10.3354/meps14575</a>","DocTypID":8,"DocType":"Journal article","MarineFlag":1,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Galloway, A.; Schram, J.B.; Lowe, A.T.; Whippo, R.; Heiser, S.; Iken, K.; McClintock, J.B.; Klein, A.G.; Amsler, M.O.; Amsler, C.D.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Galloway, A. <i>et al.</i>","Englishabstract":"The western Antarctic Peninsula (AP) is experiencing significant changes to sea ice cover, altering the macroalgal cover and potentially affecting the foundation of benthic food webs. We used fatty acid signatures as dietary and physiological trophic biomarkers to test the hypothesis that a gradient of 36-88% mean annual ice cover would affect the trophic ecology of fleshy macroalgae and diverse benthic invertebrate consumers along the western AP. We used SCUBA to collect organisms from benthic rocky nearshore habitats, 5-35 m depth, at 15 study sites during April-May of 2019. There were no consistent ecosystem-scale differences in the nutritionally important polyunsaturated fatty acids or other univariate fatty acid summary categories in either the seaweeds or invertebrates across the ice gradient, but we did find site-level differences in the multivariate fatty acid signatures of all seaweeds and invertebrates. Ice cover was a significant driver of the fatty acid signatures of 5 invertebrates, including 3 sessile (an anemone, a sponge, and a tunicate) and 2 mobile consumers (a sea star and a sea urchin). The multivariate fatty acid signatures of 2 other sea stars and a limpet were not affected by the ice gradient. 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