{"id":6135,"date":"2026-10-19T09:48:32","date_gmt":"2026-10-19T09:48:32","guid":{"rendered":"https:\/\/phd.hi.is\/doktorsvorn\/doktorsvorn-i-liffraedi-hildur-magnusdottir\/"},"modified":"2026-10-19T09:48:32","modified_gmt":"2026-10-19T09:48:32","slug":"doktorsvorn-i-liffraedi-hildur-magnusdottir","status":"publish","type":"phd_defence","link":"https:\/\/phd.hi.is\/en\/doktorsvorn\/doktorsvorn-i-liffraedi-hildur-magnusdottir\/","title":{"rendered":"Doktorsv\u00f6rn \u00ed l\u00edffr\u00e6\u00f0i – Hildur Magn\u00fasd\u00f3ttir"},"content":{"rendered":"
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Streymi:\u00a0https:\/\/livestream.com\/hi\/doktorsvornhildurmagnusdottir<\/a><\/p>\n

Doktorsefni:<\/strong>\u00a0Hildur Magn\u00fasd\u00f3ttir<\/p>\n

Heiti ritger\u00f0ar:<\/strong>\u00a0Svipfars – og erf\u00f0abreytileiki beituk\u00f3ngs Buccinum undatum (Phenotypic and genotypic variation in the subtidal gastropod Buccinum undatum)<\/p>\n

Andm\u00e6lendur:<\/strong>
<\/strong>Dr. R\u00e9my Rochette, pr\u00f3fessor vi\u00f0 H\u00e1sk\u00f3lann \u00ed New Brunswick \u00ed Saint John, Kanada
Dr. Karl Gunnarsson, l\u00edffr\u00e6\u00f0ingur \u00e1 Hafranns\u00f3knastofnun<\/p>\n

Lei\u00f0beinandi:<\/strong>\u00a0Dr. Sn\u00e6bj\u00f6rn P\u00e1lsson, pr\u00f3fessor vi\u00f0 L\u00edf- og umhverfisv\u00edsindadeild H\u00e1sk\u00f3la \u00cdslands<\/p>\n

Einnig \u00ed doktorsnefnd:
<\/strong>Dr. Erla Bj\u00f6rk \u00d6rn\u00f3lfsd\u00f3ttir, rektor H\u00e1sk\u00f3lans \u00e1 H\u00f3lum
Dr. Kristen Marie Westfall, v\u00edsindama\u00f0ur vi\u00f0 DFO, Kanada
Dr. Zophon\u00edas O. J\u00f3nsson, pr\u00f3fessor vi\u00f0 L\u00edf- og umhverfisv\u00edsindadeild H\u00e1sk\u00f3la \u00cdslands<\/p>\n

Doktorsv\u00f6rn st\u00fdrir:<\/strong>\u00a0Dr. Anna D\u00f3ra S\u00e6\u00fe\u00f3rsd\u00f3ttir, pr\u00f3fessor og deildarforseti L\u00edf- og umhverfisv\u00edsindadeildar H\u00e1sk\u00f3la \u00cdslands<\/p>\n

\u00c1grip<\/strong><\/p>\n

Sv\u00e6\u00f0isbundinn \u00fatlitsbreytileiki sj\u00e1varku\u00f0unga ber oft vitni um l\u00edtinn samgang milli stofna og getur endurspegla\u00f0 \u00fer\u00f3un a\u00f0skilinna stofna e\u00f0a mismunandi vaxtarskilyr\u00f0i \u00ed mismunandi umhverfi. \u00dear sem sj\u00e1varsniglategundir eru oft skilgreindar eing\u00f6ngu \u00fat fr\u00e1 einkennum ku\u00f0ungsins, getur sl\u00edkur \u00fatlitsbreytileiki leitt til \u00f3lj\u00f3srar flokkunarfr\u00e6\u00f0i og vanmats \u00e1 raunverulegum tegundafj\u00f6lbreytileika. \u00dea\u00f0 er \u00fev\u00ed \u00fe\u00f6rf \u00e1 a\u00f0 skilgreina tegundir b\u00e6\u00f0i \u00e1 vi\u00f0amiklum g\u00f6gnum sem n\u00e1 yfir b\u00e6\u00f0i erf\u00f0a- og \u00fatlitsuppl\u00fdsingar.<\/p>\n

Beituk\u00f3ngur (Buccinum undatum L.) er algengur sj\u00e1varsnigill \u00ed Nor\u00f0ur-Atlantshafi sem er \u00feekktur fyrir talsver\u00f0an sv\u00e6\u00f0isbundinn breytileika \u00ed l\u00f6gun og lit ku\u00f0unga. Markmi\u00f0 \u00feessa verkefnis var a\u00f0 framkv\u00e6ma yfirgripsmikla greiningu \u00e1 \u00fatlitsbreytileika beituk\u00f3ngs \u00ed Nor\u00f0ur- Atlantshafi og bera saman vi\u00f0 uppl\u00fdsingar um hvatberabreytileika tegundarinnar.<\/p>\n

Greining \u00e1 hvatberabreytileika leiddi \u00ed lj\u00f3s ein\u00e6tta\u00f0a beituk\u00f3ngsstofna \u00ed austur- og vesturhluta Nor\u00f0ur-Atlantshafs, sem hafa veri\u00f0 a\u00f0greindir s\u00ed\u00f0an snemma \u00e1 Pleistocene j\u00f6kulskei\u00f0inu (fyrir 2,1 millj\u00f3n \u00e1rum s\u00ed\u00f0an). Tegundaa\u00f0greiningarvi\u00f0mi\u00f0 bentu til \u00feess a\u00f0 um dultegundir (e. cryptic speciation) v\u00e6ri a\u00f0 r\u00e6\u00f0a, sem aflei\u00f0ing af s\u00f6gulegum a\u00f0skilna\u00f0i (e. allpatric divergence). Erf\u00f0afjarl\u00e6g\u00f0ir milli stofna \u00ed heims\u00e1lfunum tveimur voru svipa\u00f0ar e\u00f0a meiri en erf\u00f0afjarl\u00e6g\u00f0ir milli nokkurra Buccinum tegunda \u00ed Nor\u00f0ur-Kyrrahafi og Nor\u00f0ur-Atlantshafi. Munur \u00e1 \u00fatliti beituk\u00f3nga beggja vegna Nor\u00f0ur-Atlantshafs endurspeglar \u00feessa erf\u00f0afr\u00e6\u00f0ilegu a\u00f0greiningu. S\u00f6mulei\u00f0is endurspegla\u00f0ist \u00feessi munur \u00ed ungvi\u00f0i beituk\u00f3nga fr\u00e1 Kanada og \u00cdslandi sem ali\u00f0 var upp vi\u00f0 sta\u00f0la\u00f0ar a\u00f0st\u00e6\u00f0ur \u00e1 ranns\u00f3knarstofu.<\/p>\n

A\u00f0 lokum leiddi n\u00e1kv\u00e6m greining \u00e1 svipger\u00f0abreytileika beituk\u00f3ngs \u00ed Brei\u00f0afir\u00f0i \u00ed lj\u00f3s a\u00f0 litabreytileiki, l\u00f6gun og hlutfall r\u00f6nd\u00f3ttra einstaklinga voru h\u00e1\u00f0 d\u00fdpi.<\/p>\n

Um doktorsefni\u00f0<\/strong><\/p>\n

Hildur er f\u00e6dd \u00ed Reykjav\u00edk \u00e1ri\u00f0 1981. H\u00fan \u00fatskrifa\u00f0ist me\u00f0 st\u00fadentspr\u00f3f af n\u00e1tt\u00farufr\u00e6\u00f0ibraut Menntask\u00f3lans vi\u00f0 Hamrahl\u00ed\u00f0 \u00e1ri\u00f0 2001 og lauk BS-pr\u00f3fi \u00ed l\u00edffr\u00e6\u00f0i fr\u00e1 L\u00edf- og umhverfisv\u00edsindadeild H\u00e1sk\u00f3la \u00cdslands \u00e1ri\u00f0 2007.
Sama \u00e1r h\u00f3f Hildur meistaran\u00e1m \u00ed l\u00edffr\u00e6\u00f0i, einnig vi\u00f0 H\u00e1sk\u00f3la \u00cdslands, og \u00ed samstarfi vi\u00f0 V\u00f6r \u2013 Sj\u00e1varranns\u00f3knarsetur vi\u00f0 Brei\u00f0afj\u00f6r\u00f0 \u00fear sem h\u00fan einbeitti s\u00e9r a\u00f0 l\u00edfs\u00f6gu og erf\u00f0abreytileika beituk\u00f3nga \u00ed Brei\u00f0afir\u00f0i. \u00c1ri\u00f0 2010 brautskr\u00e1\u00f0ist h\u00fan \u00far meistaran\u00e1mi og \u00e1 \u00e1runum 2011-2014 sinnti h\u00fan ranns\u00f3knum hj\u00e1 V\u00f6r og starfa\u00f0i sem leiksk\u00f3lalei\u00f0beinandi \u00ed Dalsk\u00f3la, Reykjav\u00edk. H\u00fan h\u00f3f doktorsn\u00e1m vi\u00f0 L\u00edf\u2013 og umhverfisv\u00edsindadeild H\u00cd \u00e1ri\u00f0 2014 \u00ed samstarfi vi\u00f0 H\u00e1sk\u00f3lann \u00e1 H\u00f3lum.<\/p>\n

\u00c1samt doktorsn\u00e1minu hefur Hildur sinnt a\u00f0sto\u00f0arkennslu vi\u00f0 H\u00e1sk\u00f3la \u00cdslands, veri\u00f0 lei\u00f0s\u00f6guma\u00f0ur \u00ed g\u00f6ngufer\u00f0um \u00e1 vegum Fer\u00f0af\u00e9lags barnanna og H\u00e1sk\u00f3la \u00cdslands, undirb\u00fai\u00f0 menntask\u00f3lanema fyrir \u00fe\u00e1ttt\u00f6ku \u00ed \u00d3lymp\u00eduleikunum \u00ed l\u00edffr\u00e6\u00f0i, skipulagt f\u00f6studagsfyrirlestra L\u00edffr\u00e6\u00f0istofu og sinnt stj\u00f3rnarst\u00f6rfum innan Ark\u00edmedesar, f\u00e9lags doktorsnema og n\u00fddoktora vi\u00f0 H\u00cd.<\/p>\n

Hildur hefur \u00feegar hafi\u00f0 st\u00f6rf vi\u00f0 \u00e1framhaldandi ranns\u00f3knir \u00e1 fj\u00f6lbreytileika beituk\u00f3nga \u00ed Nor\u00f0ur-Atlantshafi vi\u00f0 H\u00cd.<\/p>\n

Foreldrar Hildar eru Magn\u00fas Mar\u00edsson og Sigr\u00ed\u00f0ur Sigur\u00f0ard\u00f3ttir. Hildur er gift Fannari R\u00edkar\u00f0ssyni og eiga \u00feau \u00ferj\u00fa b\u00f6rn: Sn\u00e6d\u00edsi (f. 2005), Viljar (f. 2010) og S\u00f3ld\u00edsi Mar\u00edu (f. 2019). \u00deau b\u00faa \u00ed Reykjav\u00edk.<\/p>\n<\/div><\/div>","protected":false},"featured_media":2010,"template":"","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"_phd_date_start":"2020-10-14T14:00:00+00:00","_phd_date_end":"2020-10-14T16:00:00+00:00","_phd_location":"A\u00f0albygging H\u00e1t\u00ed\u00f0arsalur","_phd_admission":"A\u00f0gangur \u00f3keypis","_phd_thesis_title":"Svipfars - og erf\u00f0abreytileiki beituk\u00f3ngs Buccinum undatum (Phenotypic and genotypic variation in the subtidal gastropod Buccinum undatum)","_phd_source_url":"https:\/\/gamli.hi.is\/vidburdir\/doktorsvorn_i_liffraedi_hildur_magnusdottir","_phd_source_node_id":"345933","_phd_source_type":"vidburdir","_phd_member_id":598,"footnotes":""},"phd_school":[96,93],"phd_discipline":[97],"class_list":["post-6135","phd_defence","type-phd_defence","status-publish","has-post-thumbnail","hentry","phd_school-lif-og-umhverfisvisindadeild","phd_school-verkfraedi-og-natturuvisindasvid","phd_discipline-phd-i-liffraedi"],"_links":{"self":[{"href":"https:\/\/phd.hi.is\/en\/wp-json\/wp\/v2\/phd_defence\/6135","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/phd.hi.is\/en\/wp-json\/wp\/v2\/phd_defence"}],"about":[{"href":"https:\/\/phd.hi.is\/en\/wp-json\/wp\/v2\/types\/phd_defence"}],"version-history":[{"count":0,"href":"https:\/\/phd.hi.is\/en\/wp-json\/wp\/v2\/phd_defence\/6135\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/phd.hi.is\/en\/wp-json\/wp\/v2\/media\/2010"}],"wp:attachment":[{"href":"https:\/\/phd.hi.is\/en\/wp-json\/wp\/v2\/media?parent=6135"}],"wp:term":[{"taxonomy":"phd_school","embeddable":true,"href":"https:\/\/phd.hi.is\/en\/wp-json\/wp\/v2\/phd_school?post=6135"},{"taxonomy":"phd_discipline","embeddable":true,"href":"https:\/\/phd.hi.is\/en\/wp-json\/wp\/v2\/phd_discipline?post=6135"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}