{"id":6213,"date":"2026-10-19T09:48:38","date_gmt":"2026-10-19T09:48:38","guid":{"rendered":"https:\/\/phd.hi.is\/doktorsvorn\/doktorsvorn-i-liffraedi-ingeborg-klarenberg\/"},"modified":"2026-10-19T09:48:38","modified_gmt":"2026-10-19T09:48:38","slug":"doktorsvorn-i-liffraedi-ingeborg-klarenberg","status":"publish","type":"phd_defence","link":"https:\/\/phd.hi.is\/en\/doktorsvorn\/doktorsvorn-i-liffraedi-ingeborg-klarenberg\/","title":{"rendered":"Doktorsv\u00f6rn \u00ed l\u00edffr\u00e6\u00f0i – Ingeborg Klarenberg"},"content":{"rendered":"
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Streymi<\/strong><\/a><\/p>\n

Doktorsefni:<\/strong>\u00a0Ingeborg Klarenberg<\/p>\n

Heiti ritger\u00f0ar:<\/strong>\u00a0Bakter\u00edusamf\u00e9l\u00f6g og niturbinding \u00ed mosum og fl\u00e9ttum \u00e1 t\u00edmum loftslagsbreytinga (Bacterial communities of lichens and mosses and nitrogen fixation in a warming climate)<\/p>\n

Andm\u00e6lendur:<\/strong>
<\/strong>Dr. James Bradley, lektor vi\u00f0 Queen Mary University of London
Dr. Pauline Vannier, s\u00e9rfr\u00e6\u00f0ingur hj\u00e1 Mat\u00eds<\/p>\n

Lei\u00f0beinandi:<\/strong>\u00a0Dr. Oddur Vilhelmsson, pr\u00f3fessor og forseti Vi\u00f0skipta- og raunv\u00edsindasvi\u00f0s H\u00e1sk\u00f3lans \u00e1 Akureyri<\/p>\n

Umsj\u00f3narkennari: <\/strong>Dr. \u00d3lafur S. Andr\u00e9sson, pr\u00f3fessor vi\u00f0 L\u00edf- og umhverfisv\u00edsindadeild H\u00e1sk\u00f3la \u00cdslands<\/p>\n

Einnig \u00ed doktorsnefnd:<\/strong>
<\/strong>Dr. Starri Hei\u00f0marsson, fl\u00e9ttufr\u00e6\u00f0ingur hj\u00e1 N\u00e1tt\u00farufr\u00e6\u00f0istofnun \u00cdslands
Dr. Margr\u00e9t Au\u00f0ur Sigurbj\u00f6rnsd\u00f3ttir, d\u00f3sent vi\u00f0 Vi\u00f0skipta- og raunv\u00edsindasvi\u00f0 H\u00e1sk\u00f3lans \u00e1 Akureyri
Dr. Ingibj\u00f6rg Svala J\u00f3nsd\u00f3ttir, pr\u00f3fessor vi\u00f0 L\u00edf- og umhverfisv\u00edsindadeild H\u00e1sk\u00f3la \u00cdslands<\/p>\n

Doktorsv\u00f6rn st\u00fdrir: <\/strong>Dr.\u00a0Anna 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

Me\u00f0al aflei\u00f0inga hl\u00fdnunar loftslags \u00e1 nor\u00f0ursl\u00f3\u00f0um m\u00e1 nefna h\u00f6rfun j\u00f6kla og \u00fdmsar gr\u00f3\u00f0urbreytingar. Mosar og fl\u00e9ttur leggja miki\u00f0 af m\u00f6rkum til vistkerfislegra ferla \u00ed hinu kalda umhverfi nor\u00f0ursl\u00f3\u00f0a, \u00fear \u00e1 me\u00f0al bindingu k\u00f6fnunarefnis me\u00f0 a\u00f0sto\u00f0 \u00feeirra \u00f6rvera sem \u00ed \u00feeim \u00fer\u00edfast. Eitt af meginmarkmi\u00f0um \u00feeirra ranns\u00f3kna sem greint er fr\u00e1 \u00ed ritsm\u00ed\u00f0 \u00feessari er a\u00f0 lei\u00f0a fram a\u00f0 hve miklu leyti loftslagshl\u00fdnun \u00e1 \u00e1ratuga skala hefur \u00e1hrif \u00e1 \u00f6rverusamf\u00e9l\u00f6g \u00ed fl\u00e9ttunni Cetraria islandica (fjallagr\u00f6s) og \u00ed gamburmosanum Racomitrium lanuginosum (hraungambri). \u00deessar tegundir eru me\u00f0al algengustu fl\u00e9ttu- og mosategunda \u00ed m\u00f6rgum \u00edslenskum vistger\u00f0um. \u00cd Grein I er s\u00fdnt fram \u00e1 a\u00f0 langt\u00edmahl\u00fdnun hefur \u00e1hrif \u00e1 samsetningu \u00f6rverul\u00edfr\u00edkisins \u00ed fjallagr\u00f6sum og a\u00f0 \u00feau \u00e1hrif eru a\u00f0 hluta tengd breytingum \u00e1 a\u00f0l\u00e6gum gr\u00f3\u00f0ri. Hi\u00f0 sama reyndist eiga vi\u00f0 um \u00f6rverusamf\u00e9l\u00f6g hraungambra, nema hva\u00f0 hl\u00fdnunin reyndist ekki hafa markt\u00e6k \u00e1hrif \u00e1 niturbindingu, og kom fram a\u00f0 s\u00fa ni\u00f0ursta\u00f0a g\u00e6ti sk\u00fdrst af breyttri tegundasamsetningu niturbindandi bakter\u00eda (Grein II). Anna\u00f0 meginmarkmi\u00f0 ranns\u00f3knanna var a\u00f0 meta a\u00f0 hve miklu leyti \u00f6rverusamf\u00e9l\u00f6g \u00ed tveimur gamburmosategundum og \u00ed jar\u00f0veginum sem \u00fe\u00e6r vaxa \u00e1 taka breytingum me\u00f0 gr\u00f3\u00f0urframvindu og hvort \u00fe\u00e6r breytingar tengjast \u00e1standi mosans og starfsemi \u00e1 bor\u00f0 vi\u00f0 niturbindingu. \u00d6rverusamf\u00e9l\u00f6gin voru \u00feannig kortl\u00f6g\u00f0 me\u00f0 tilliti til aldurs j\u00f6kulgar\u00f0a Fl\u00e1aj\u00f6kuls, og einnig vi\u00f0 rakainnihald mosans. Bakter\u00edusamf\u00e9l\u00f6g \u00ed jar\u00f0veginum t\u00f3ku sk\u00fdrum breytingum me\u00f0 aldri j\u00f6kulgar\u00f0anna, og st\u00f3\u00f0u einnig \u00ed samhengi vi\u00f0 C:N hlutfall mosans sem \u00e1 honum \u00f3x. Niturbinding st\u00f3\u00f0 ekki \u00ed markt\u00e6ku samhengi vi\u00f0 aldur j\u00f6kulgar\u00f0anna, en var hins vegar sk\u00fdrt fylgin samsetningu \u00f6rverul\u00edfr\u00edkisins.<\/p>\n

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

Ingeborg Klarenberg f\u00e6ddist \u00ed M\u00fcnchen \u00ed \u00de\u00fdskalandi \u00e1ri\u00f0 1988 en fluttist til Hollands vi\u00f0 n\u00edu \u00e1ra aldur. H\u00fan lauk n\u00e1mi \u00ed jar\u00f0v\u00edsindum til BS-gr\u00e1\u00f0u vi\u00f0 Utrecht-h\u00e1sk\u00f3la \u00e1ri\u00f0 2012, og til MS-gr\u00e1\u00f0u \u00ed umhverfisv\u00edsindum fr\u00e1 sama h\u00e1sk\u00f3la \u00e1ri\u00f0 2015. \u00c1ri\u00f0 2016 h\u00f3f h\u00fan n\u00e1m til doktorsgr\u00e1\u00f0u vi\u00f0 H\u00e1sk\u00f3la \u00cdslands \u00ed samvinnu vi\u00f0 H\u00e1sk\u00f3lann \u00e1 Akureyri og innan MicroArctic samstarfsnetsins, sem styrkt er af Marie Sk\u0142odowska-Curie sj\u00f3\u00f0i Evr\u00f3pusambandsins.<\/p>\n<\/div><\/div>","protected":false},"featured_media":4977,"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 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