{"id":6434,"date":"2026-10-19T09:48:54","date_gmt":"2026-10-19T09:48:54","guid":{"rendered":"https:\/\/phd.hi.is\/doktorsvorn\/doktorsvorn-i-liffraedi-sum-yi-lai\/"},"modified":"2026-10-19T09:48:54","modified_gmt":"2026-10-19T09:48:54","slug":"doktorsvorn-i-liffraedi-sum-yi-lai","status":"publish","type":"phd_defence","link":"https:\/\/phd.hi.is\/en\/doktorsvorn\/doktorsvorn-i-liffraedi-sum-yi-lai\/","title":{"rendered":"Doktorsv\u00f6rn \u00ed l\u00edffr\u00e6\u00f0i &#8211; Sum Yi Lai"},"content":{"rendered":"<div class=\"field-items\">\n<div class=\"field-item even\" property=\"content:encoded\">\n<p><strong>Doktorsefni:<br \/><\/strong>Sum Yi Lai<\/p>\n<p><strong>Heiti ritger\u00f0ar:<br \/><\/strong>Breytileiki \u00ed f\u00e6\u00f0uvef Atlantshafslax \u00ed t\u00edma og r\u00fami<\/p>\n<p><strong>Andm\u00e6lendur:<br \/><\/strong>Dr. Stef\u00e1n \u00d3li Steingr\u00edmsson, pr\u00f3fessor vi\u00f0 H\u00e1sk\u00f3lann \u00e1 H\u00f3lum, dr. Lee Brown pr\u00f3fessor vi\u00f0 Landfr\u00e6\u00f0ideild H\u00e1sk\u00f3lans \u00ed Leeds<\/p>\n<p><strong>Lei\u00f0beinendur:<br \/><\/strong>Hlynur B\u00e1r\u00f0arson og J\u00f3n S. \u00d3lafsson<\/p>\n<p><strong>Einnig \u00ed doktorsnefnd:<br \/><\/strong>Hlynur B\u00e1r\u00f0arson, l\u00edffr\u00e6\u00f0ingur vi\u00f0 Ferskvatns- og eldissvi\u00f0 hj\u00e1 Hafranns\u00f3knastofnun, J\u00f3n S. \u00d3lafsson, vatnal\u00edffr\u00e6\u00f0ingur vi\u00f0 Ferskvatns- og eldissvi\u00f0 hj\u00e1 Hafranns\u00f3knastofnun, Arnar P\u00e1lsson, pr\u00f3fessor vi\u00f0 L\u00edf- og umhverfisv\u00edsindadeild H\u00cd, Ingi R\u00fanar J\u00f3nsson, l\u00edffr\u00e6\u00f0ingur vi\u00f0 Ferskvatns- og eldissvi\u00f0 hj\u00e1 Hafranns\u00f3knastofnun, J\u00f3hannes Gu\u00f0brandsson, s\u00e9rfr\u00e6\u00f0ingur vi\u00f0 Ferskvatns- og eldissvi\u00f0 hj\u00e1 Hafranns\u00f3knastofnun<br \/><strong><\/strong><\/p>\n<p><strong>Stj\u00f3rnandi varnar:<br \/><\/strong>Dr. Sn\u00e6bj\u00f6rn P\u00e1lsson, pr\u00f3fessor og deildarforseti L\u00edf- og umhverfisv\u00edsindadeildar H\u00e1sk\u00f3la \u00cdslands<\/p>\n<p><strong>\u00c1grip:<br \/><\/strong>Stofnst\u00e6r\u00f0 Atlantshafslax hefur dregist saman \u00e1 undanf\u00f6rnum \u00e1ratugum. Markmi\u00f0i\u00f0 me\u00f0 \u00feessu doktorsverkefni er a\u00f0 auka skilning okkar \u00e1 \u00e1hrifum f\u00e6\u00f0uframbo\u00f0s fyrir ungvi\u00f0i Atlantshafslax og hlutverk hans \u00ed f\u00e6\u00f0uvef \u00e1a, me\u00f0 \u00e1herslu \u00e1 nor\u00f0l\u00e6gar, n\u00e6ringasnau\u00f0ar \u00e1r. Samband r\u00e1nd\u00fdrs og f\u00e6\u00f0u hj\u00e1 Atlantshafslaxi var kanna\u00f0 \u00ed \u00e1m \u00e1 Nor\u00f0austurlandi. A\u00f0 auki voru f\u00e6\u00f0uvefir Atlantshafslax \u00ed \u00e1m \u00e1 Nor\u00f0ur-Atlantshafi bornir saman \u00ed t\u00edma og r\u00fami. Ni\u00f0urst\u00f6\u00f0urnar s\u00fdndu a\u00f0 lirfur og p\u00fapur rykm\u00fds (Chironomidae) voru \u00ed mestum \u00fe\u00e9ttleika me\u00f0al botnl\u00e6gra hryggleysingja og var uppista\u00f0an \u00ed f\u00e6\u00f0u ungvi\u00f0is laxa \u00e1 Nor\u00f0austurlandi. Ni\u00f0urst\u00f6\u00f0urnar s\u00fdndu einnig hvernig f\u00e6\u00f0uframbo\u00f0 \u00ed n\u00e6ringarsnau\u00f0um \u00e1m \u00e1 Nor\u00f0austurlandi minnka\u00f0i \u00e1 23 \u00e1ra t\u00edmabili. F\u00e6\u00f0u\u00f0vefir voru svipa\u00f0ir b\u00e6\u00f0i innan og \u00e1 milli \u00e1a \u00e1 sama sv\u00e6\u00f0i og tengist landfr\u00e6\u00f0ilegri einangrun og einsleitni \u00ed umhverfi og eiginleikum \u00e1 vatnasvi\u00f0i \u00e1nna. A\u00f0 auki s\u00fdnir samanbur\u00f0ur \u00e1 Nor\u00f0ur-Atlantshafi hvernig f\u00e6\u00f0uvefir eru fl\u00f3knari \u00e1 su\u00f0l\u00e6gari breiddargr\u00e1\u00f0um og hvernig \u00fea\u00f0 tengist b\u00e6\u00f0i hitastigi og gr\u00f3\u00f0urfari. Ungvi\u00f0i Atlantshafslax \u00e1 k\u00f6ldum, nor\u00f0l\u00e6gum sv\u00e6\u00f0um \u00fear sem f\u00e6\u00f0uvefir eru einfaldari, lifa vi\u00f0 minna f\u00e6\u00f0uframbo\u00f0, og \u00fear af lei\u00f0andi eru stofnar \u00feeirra \u00ed h\u00e6ttu samfara \u00e1hrifum loftlagsbreytinga. Af \u00feeim \u00e1st\u00e6\u00f0um g\u00e6ti v\u00f6ktun laxastofna \u00e1 nor\u00f0l\u00e6gum sl\u00f3\u00f0um or\u00f0i\u00f0 v\u00edsir til a\u00f0 meta \u00e1hrif hnattr\u00e6nna breytinga \u00e1 nor\u00f0l\u00e6g vistkerfi.<\/p>\n<p><strong>Um doktorsefni\u00f0:<br \/><\/strong>Sum Yi Lai lauk B.Sc. gr\u00e1\u00f0u \u00ed Umhverfisfr\u00e6\u00f0i vi\u00f0 H\u00e1sk\u00f3lann \u00ed East Anglia \u00e1ri\u00f0 2018, og M.Sc. gr\u00e1\u00f0u \u00ed Vistkerfis og Umhverfis breytingum vi\u00f0 Imperial College London \u00e1ri\u00f0 2019. \u00c1hugi hennar \u00e1 a\u00f0 rannsaka \u00e1hrif loftslagsbreytinga \u00e1 vistfr\u00e6\u00f0ileg samf\u00e9l\u00f6g leiddi hana \u00ed doktorsn\u00e1m vi\u00f0 H\u00e1sk\u00f3la \u00cdslands og Hafranns\u00f3knastofnun. Sum Yi mun halda \u00e1fram a\u00f0 vinna a\u00f0 \u00feessum ranns\u00f3knar\u00e1huga sem n\u00fddoktor vi\u00f0 H\u00e1sk\u00f3lann \u00ed Helsinki.<strong> <br \/><\/strong><\/p>\n<\/div><\/div>","protected":false},"featured_media":5822,"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":"2024-08-30T13:00:00+00:00","_phd_date_end":"2024-08-30T15:00:00+00:00","_phd_location":"A\u00f0albygging H\u00e1t\u00ed\u00f0arsalur","_phd_admission":"A\u00f0gangur \u00f3keypis","_phd_thesis_title":"Breytileiki \u00ed f\u00e6\u00f0uvef Atlantshafslax \u00ed t\u00edma og r\u00fami","_phd_source_url":"https:\/\/gamli.hi.is\/vidburdir\/doktorsvorn_i_liffraedi_sum_yi_lai","_phd_source_node_id":"434937","_phd_source_type":"vidburdir","_phd_member_id":975,"footnotes":""},"phd_school":[96,93],"phd_discipline":[97],"class_list":["post-6434","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\/6434","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\/6434\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/phd.hi.is\/en\/wp-json\/wp\/v2\/media\/5822"}],"wp:attachment":[{"href":"https:\/\/phd.hi.is\/en\/wp-json\/wp\/v2\/media?parent=6434"}],"wp:term":[{"taxonomy":"phd_school","embeddable":true,"href":"https:\/\/phd.hi.is\/en\/wp-json\/wp\/v2\/phd_school?post=6434"},{"taxonomy":"phd_discipline","embeddable":true,"href":"https:\/\/phd.hi.is\/en\/wp-json\/wp\/v2\/phd_discipline?post=6434"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}