Contact<\/em> :<\/p>\n\n\n\n Unit\u00e9 d\u2019Ecologie Sociale (USE)<\/p>\n\n\n\n ULB CP 231<\/p>\n\n\n\n Campus de la Plaine<\/p>\n\n\n\n bd du Triomphe, B-1050 Bruxelles<\/p>\n\n\n\n E-mail: Pauline.Gardin@ulb.be<\/p>\n\n\n\n Tel: 02.650.55.30 (from abroad +32.2.650.55.30) <\/p>\n\n\n\n <\/p>\n\n\n\n <\/p>\n\n\n\n Research<\/strong><\/p>\n\n\n\n Mutualism or antagonism in tripartite relationships between ants, aphids and parasitoid wasps: understanding of coexistence mechanisms of concerned species<\/strong><\/p>\n\n\n\n <\/p>\n\n\n\n In ecosystems, many species coexist and exploit the same resources. This is the case of the tripartite system involving aphids, ants and parasitoids. Aphids are an abundant source of protein for the insects consuming them and their honeydew a source of sugar. Thus, ants have developed a mutualistic relationship with aphids by exploiting their honeydew and maintaining the colonies. Meanwhile, aphid parasitoids exploit protein resources at the larval stage (parasitic predation) as well as the honeydew at the adult stage (commensalism). Although they exploit the same resource, ants and parasitoids coexist in environments where aphids are present. <\/p>\n\n\n\n <\/p>\n\n\n\n In apple orchards, the rosy apple aphid (Dysaphis plantaginea<\/em>) is attended by the ant Lasius niger<\/em>. This ant species is aggressive towards the presence of parasitoids wasp in protected colonies. Yet, the parasitoids Binodoxys angelicae<\/em> and Ephedrus persicae<\/em> are regularly found in these colonies. The main goal of this project is to understand the mechanisms allowing each of these species to coexist. We hypothesize that parasitoids are able to adapt their behavior in the presence of ants and thus stay in the orchards. The fitness gain brought by ants to aphids would then compensate the impact of parasitoids on them. <\/p>\n\n\n\n <\/p>\n\n\n\n <\/p>\n\n\n\n This project is divided in three sections : <\/p>\n\n\n\n 1) the analysis of the impact of L. niger<\/em> on the fitness of D. plantaginea <\/em>on apple trees ; <\/p>\n\n\n\n 2) the analysis of the parasitism capacity of E. persicae and B. angelicae <\/em>on D. plantaginea <\/em>in the presence or absence of L. niger<\/em> ; <\/p>\n\n\n\n 3) the analysis of the behavior of L. niger<\/em> with respect to parasitized aphids of D. plantaginea<\/em>. <\/p>\n\n\n\n A better knowledge of this tripartite relationship will highlight the mechanisms explaining the coexistence of these species in ecosystems.<\/p>\n\n\n\n <\/p>\n","protected":false},"excerpt":{"rendered":" PhD student Contact : Unit\u00e9 d\u2019Ecologie Sociale (USE) ULB CP 231 Campus de la Plaine bd du Triomphe, B-1050 Bruxelles E-mail: Pauline.Gardin@ulb.be Tel: 02.650.55.30 (from abroad +32.2.650.55.30) Fax: 02.650.59.87 (from abroad +32.2.650.59.87) Research Mutualism or antagonism in tripartite relationships between ants, aphids and parasitoid wasps: understanding of coexistence mechanisms of concerned species In ecosystems, many species coexist…<\/p>\n","protected":false},"author":22,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-894","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/use.ulb.be\/wordpress\/wp-json\/wp\/v2\/pages\/894","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/use.ulb.be\/wordpress\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/use.ulb.be\/wordpress\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/use.ulb.be\/wordpress\/wp-json\/wp\/v2\/users\/22"}],"replies":[{"embeddable":true,"href":"https:\/\/use.ulb.be\/wordpress\/wp-json\/wp\/v2\/comments?post=894"}],"version-history":[{"count":9,"href":"https:\/\/use.ulb.be\/wordpress\/wp-json\/wp\/v2\/pages\/894\/revisions"}],"predecessor-version":[{"id":919,"href":"https:\/\/use.ulb.be\/wordpress\/wp-json\/wp\/v2\/pages\/894\/revisions\/919"}],"wp:attachment":[{"href":"https:\/\/use.ulb.be\/wordpress\/wp-json\/wp\/v2\/media?parent=894"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
Fax: 02.650.59.87 (from abroad +32.2.650.59.87)<\/em><\/p>\n\n\n\n![\"\"](\"http:\/\/use.ulb.be\/wordpress\/wp-content\/uploads\/2020\/02\/IMG_20180918_130356-1024x779.jpg\")
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