{"refrec":{"BRefID":196219,"RR":"<b>Rossi, F.; Olabarria, C.; Incera, M.; Garrido, J.</b> (2010). The trophic significance of the invasive seaweed <i>Sargassum muticum</i> in sandy beaches. <i>J. Sea Res. 63(1)</i>: 52-61. <a href=\"http://dx.doi.org/10.1016/j.seares.2009.09.005\" target=\"_blank\">http://dx.doi.org/10.1016/j.seares.2009.09.005</a>","BEntID":188674,"PublicFlag":1,"CheckedFlag":1,"wosflag":1,"vabbflag":null,"RefStringPartII":". <i>J. Sea Res. 63(1)</i>: 52-61. <a href=\"https://dx.doi.org/10.1016/j.seares.2009.09.005\" target=\"_blank\">https://dx.doi.org/10.1016/j.seares.2009.09.005</a>","DocTypID":8,"DocType":"Journal article","MarineFlag":1,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Rossi, F.; Olabarria, C.; Incera, M.; Garrido, J.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Rossi, F. <i>et al.</i>","Englishabstract":"Native and exotic seaweeds frequently lie on the beach and sustain part of the benthic food web. However, the role of exotic seaweeds as food sources for beach consumers has been poorly studied. We studied the temporal and spatial variability in the trophic significance of the invasive brown seaweed <i>Sargassum muticum</i> on sandy beaches. We measured the stable isotopes (<i>&#x3b4;</i><sup>13</sup>C and <i>&#x3b4;</i><sup>15</sup>N) in the tissues of <i>S. muticum</i> and of invertebrate consumers and estimated the dietary biomass proportion of <i>S. muticum</i> during four sampling dates at two beaches and heights on the shore. Samples were collected from eight pitfall traps placed at a distance of 2&nbsp;m from each other. Detrital macroalgae and seagrasses were also collected by hand within an area of 30&nbsp;cm around each pitfall trap. We measured the spatial and temporal variability in the isotope composition of the beach consumers and of <i>S. muticum</i> using different models of analyses of variance. We then calculated the biomass proportion of <i>S. muticum</i> to the animal diet with a two-isotopic mixing model. The invasive alga <i>S. muticum</i> seemed to be one of the main food sources for the amphipod <i>Talitrus saltator</i> and, to a less extent, for the isopod <i>Tylos europaeus</i>. The importance of <i>S. muticum</i> was however temporally variable and decreased during spring (in March and May), probably due to the availability of native macrophytes. The supply of invasive wrack to beach food webs thus deserves more attention if we want to understand their role in influencing food web dynamics.","AbstractOtherLang":null,"BibLvlCode":"AS","StandardTitle":"The trophic significance of the invasive seaweed <i>Sargassum muticum</i> in sandy beaches","OrigTitleLangCode":"en","OrigTitleLangCodeExtended":"eng","OrigTitleLangID":15,"DateLastModified":{"date":"2025-07-02 08:33:14.980000","timezone_type":1,"timezone":"+00:00"},"UserAccessRight":null,"UserAccID":null,"AuthorKeywords":"Stable Isotopes; Macrofauna; Invasive Species; Food Web; Sargassummuticum; Sandy Beaches; Galician Coast","OtherDescriptors":null,"Notes":null,"AnaPub":2010,"MonPub":null,"DateUpdate":"2018-02-13","DateCreate":"2010-06-10","SecASFANote":null,"ConfID":null,"PeerRev":1,"VlizCoreFlag":1,"WoScode":"WOS:000274070100006","VABBcode":null,"OpenAcc":1,"DOI":"10.1016/j.seares.2009.09.005"},"refs":null,"anarec":{"AnaID":196219,"PubliDate":2010,"Pagination":"52-61","XtraPublOfAnaID":null,"ISBN":null,"Volume":"63","Issue":"1","BRefMon":null,"BRefMonRR":null,"BRefXtra":null,"BRefXtraRR":null,"SerBRefID":43261,"SerRR":"Journal of Sea Research. 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