Isotopic niche provides an insight into the ecology of a symbiont during its geographic expansion  

作　　者：Enrique GONZALEZ-ORTEGON Marta PEREZ-MIGUEL Jose I.NAVAS Pilar DRAKE Jose A.CUESTA 

机构地区：[1]Instituto de Ciencias Marinas de Andalucia(ICMAN-CSIC),Campus Universitario Rio San Pedro,Avda.Republica Saharaui,2,11519,Cadiz,Puerto Real,Spain [2]Unidad Asociada Crecimiento Azul CSIC-IFAPA,El Puerto de Santa Maria Spain,Spain [3]Instituto de Investigacion y Formacion Agraria y Pesquera,IFAPA-Centro Agua del Pino,Ctra.EI Rompido-Punta Umbria,km 3.8,21459 EI Rompido,Huelva,Spain

出　　处：《Current Zoology》2022年第2期185-197,共13页动物学报（英文版）

基　　金：This work was partially funded by a grant from CSIC under the Intramural Research program 2018 with the grant number 2018301081 and the Spanish “Ministerio de Economia y Competitividad(MINECO),Plan Nacional I+D”and the European FEDER funds through project AFROBIV(CGL2014-53557-P);The MINECO also supported an FPI Postdoctoral contract for MPM(BES-2015-072703).

摘　　要：The study of the recent colonization of a symbiont and its interaction with host communities in new locations is an opportunity to understand how they interact.The use of isotopic ratios in trophic ecology can provide measurements of a species'isotopic niche,as well as knowledge about how the isotopic niches between symbiont and host species overlap.Stable isotope measurements were used to assess the sources of carbon assimilated by the host species(the bivalves Mytilus galloprovincialis and Scrobicularia plana)and their associated symbiont pea crab Afropinnotheres monodi,which occurs within these bivalves'mantle cavities.The mixing model estimates suggest that all of them assimilate carbon from similar sources,particularly from pseudofaeces and particulate organic matter in this symbiotic system based on filter feeding.The symbiotic species occupy comparable trophic levels and its association seems to be commensal or parasitic depending on the duration of such association.The pea crab A.monodi reflects a sex-specific diet,where males are more generalist than the soft females because the latter's habitat is restricted to the host bivalve.The high isotopic overlap between soft females and M.galloprovincialis may reflect a good commensal relationship with the host.

关 键 词：bivalves COMMENSAL KLEPTOPARASITISM PARASITISM stable isotope trophic position 

分 类 号：Q958.122.3[生物学—动物学]