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Silberberger M, Thormar J, Fredriksen S (2016) Small scale removal of seagrass (Zostera marina L.): Effects on the infaunal community. Marine Biology Research. DOI:10.1080/17451000.2016.1225959

Thormar J, Hasler-Sheetal H, Baden S, Boström C, Clausen KK, Krause-Jensen D, Olesen B, Rasmussen JR, Svensson CJ, Holmer M (2016) Local environmental state regulates eelgrass (Zostera marina) food web structure. PLoS ONE 11(1): e0146479 DOI:10.1371/journal.pone.0146479

Duffy JE, Reynolds P, Boström C, Coyer J, Cusson M, Donadi S, Douglass J, Engelen A, Eriksson BK, Fredriksen S, Gamfeldt L, Gustafsson C, Hoarau G, Hori M, Hovel K, Iken K, Lefcheck J, Moksnes P‐O, Nakaoka M, O'Connor M, Olsen J, Richardson JP, Ruesink J, Sotka E, Thormar J, Whalen M, Stachowicz J. (2015) Biodiversity mediates top‐down control in eelgrass ecosystems: A global comparative‐experimental approach. Ecology Letters 18:696-705 DOI:10.1111/ele.12448

Herranz M, Thormar J, Benito J, Sánchez N, Pardos F (2012) Meristoderes gen. nov., a new kinorhynch genus, with the description of two new species and their implications for echinoderid phylogeny (Kinorhyncha: Cyclorhagida, Echinoderidae). Zoologischer Anzeiger 251:161-179 DOI:10.1016/j.jcz.2011.08.004

Sørensen MV & Thormar J (2010) Wollunquaderes majkenae gen. et sp. nov. - a new cyclorhagid kinorhynch genus and species from the Coral Sea, Australia. Marine Biodiversity, 40:261-275. DOI:10.1007/s12526-010-0048-x

Thormar J & Sørensen MV (2010). Two new species of Echinoderes (Kinorhyncha: Cyclorhagida) from the Solomon Islands. Meiofauna Marina 18:67-96.

Falk-Petersen S, Leu E, Berge J, Kwasniewski S, Nygård H, Røstad A, Keskinen E, Thormar J, Quillfeldt C, Wold A, Gulliksen B (2008) Vertical migration in high Arctic waters during autumn 2004. Deep Sea Research Part II - Topical Studies in Oceanography 55:2275–2284. DOI:10.1016/j.dsr2.2008.05.010

Thormar J (2008) The Rhodoliths of Disko Fjord, Greenland: First visual record of the Litothamnion glaciale/tophiforme (Corallinales, Rhodophyta) aggregation in Disko Fjord, 69°N, Greenland“ In: Halberg KA (ed) Arctic Biology Field Course, Qeqertarsuaq, 2006. Institute of Biology, University of Copenhagen. ISBN 87-87519-67-4.

Macnaughton MO, Thormar J, Berge J (2007) Sympagic amphipods in the Arctic pack ice: redescriptions of Eusirus holmii Hansen, 1887 and Pleusymtes karstensi (Barnard, 1959). Polar Biology, 30:1013-1025. DOI: 10.1007/s00300-007-0260-8

Møller PR, Feld TK, Poulsen IH, Thomsen PF, Thormar JG (2005) Myxine jespersenae, A New Species of Hagfish (Myxiniformes: Myxinidae) from the North Atlantic Ocean. Copeia (American Society of Ichthyologists and Herpetologists), 2005(2):274-285

Christoffersen K, Thormar J, Bille-Hansen R (2005). Biological state of arctic lakes and ponds on Disko Island, Greenland. In: Arctic fieldcourse 2004. Institute of Biology, University of Copenhagen. ISBN 87-987317-2-6.

Keskinen E, Leu E, Nygård H, Røstad A, Thormar J (2004). New findings of diel vertical migration in high Arctic ecosystems. In: Berge J (ed) AB320-2004. UNIS Publication Series ISSN 1503-4410.

Books:

Macnaughton, Thormar, Kielland (2012). Livet under overfladen. Gyldendal. ISBN: 9788702098945. 288p.

• Reynolds, Pamela L.; Stachowicz, John J.; Hovel, Kevin; Boström, Christoffer; Boyer, Katharyn; Cusson, Mathieu; Eklöf, Johan S.; Engel, Friederike G; Engelen, Aschwin H.; Eriksson, Britas Klemens; Fodrie, F Joel; Griffin, John; Hereu, Clara M; Hori, Masakazu; Hanley, Torrance C; Ivanov, Mikhail; Jorgensen, Pablo; Kruschel, Claudia; Lee, Kun-Seop; McGlathery, Karen; Moksnes, Per-Olav; Nakaoka, Masahiro; O'Connor, Mary I.; O'Connor, Nessa E; Orth, Robert J; Rossi, Francesca; Ruesink, Jennifer L.; Sotka, Erik E.; Thormar, Jonas; Tomas, Fiona; Unsworth, Richard K.F.; Whalen, Matthew A. & Duffy, J. Emmett (2018). Latitude, temperature, and habitat complexity predict predation pressure in eelgrass beds across the Northern Hemisphere. Ecology.  ISSN 0012-9658.  99(1), s 29- 35 . doi: 10.1002/ecy.2064
• Silberberger, Marc Jürgen; Thormar, Jonas & Fredriksen, Stein (2016). Small-scale removal of seagrass (Zostera marina L.): effects on the infaunal community. Marine Biology Research.  ISSN 1745-1000.  12, s 993- 1002 . doi: 10.1080/17451000.2016.1225959
• Thormar, Jonas; Hasler-Sheetal, Harald; Baden, Susanne; Boström, Christoffer; Clausen, Kevin Kuhlmann; Krause-Jensen, Dorte; Olesen, Birgit; Rasmussen, Jonas Ribergaard; Svensson, Carl Johan & Holmer, Marianne (2016). Eelgrass (Zostera marina) food web structure in different environmental settings. PLoS ONE.  ISSN 1932-6203.  11(1) . doi: 10.1371/journal.pone.0146479
• Duffy, J. Emmett; Reynolds, Pamela L.; Boström, Christoffer; Coyer, James A.; Cusson, Mathieu; Donadi, Serena; Douglass, James G.; Eklöf, Johan S.; Engelen, Aschwin H.; Eriksson, Britas Klemens; Fredriksen, Stein; Gamfeldt, Lars; Gustafsson, Camilla; Hoarau, Galice; Hori, Masakazu; Hovel, Kevin; Iken, Katrin; Lefcheck, Jonathan S.; Moksnes, Per-Olav; Nakaoka, Masahiro; O'Connor, Mary I.; Olsen, Jeanine L.; Richardson, J. Paul; Ruesink, Jennifer L.; Sotka, Erik E.; Thormar, Jonas Gjaldbæk; Whalen, Matthew A. & Stachowicz, John J. (2015). Biodiversity mediates top-down control in eelgrass ecosystems: a global comparative-experimental approach. Ecology Letters.  ISSN 1461-023X.  18(7), s 696- 705 . doi: 10.1111/ele.12448
• Herranz, María; Thormar, Jonas; Benito, Jesús; Sánchez, Nuria & Pardos, Fernando (2012). Meristoderes gen. nov., a new kinorhynch genus, with the description of two new species and their implications for echinoderid phylogeny (Kinorhyncha: Cyclorhagida, Echinoderidae). Zoologischer Anzeiger.  ISSN 0044-5231.  251(3), s 161- 179 . doi: 10.1016/j.jcz.2011.08.004
• Falk-Petersen, Stig; Leu, Eva; Berge, Jørgen; Kwasniewski, Slawomir; Nygård, Henrik; Røstad, Anders; Keskinen, Essi; Thormar, Jonas; von Quillfeldt, Cecilie; Wold, Anette & Gulliksen, Bjørn (2008). Vertical migration in high Arctic waters during autumn 2004. Deep-sea research. Part II, Topical studies in oceanography.  ISSN 0967-0645.  55(20-21), s 2275- 2284 . doi: 10.1016/j.dsr2.2008.05.010 Show summary

  The diel vertical migration (DVM) of zooplankton and pelagic fish in the southern Arctic Ocean (82°N) and in Rijpfjorden (Svalbard, Nordaustlandet, 80°N) was investigated in autumn 2004, when there were distinct differences in light conditions between day and night. We collected data on zooplankton and fish distribution using plankton nets, trawls, and an echo sounder together with data on environmental parameters including sea-ice distribution, hydrography, and in situ fluorescence in the water column. In Rijpfjorden, the Arctic phytoplankton bloom had culminated several weeks prior to the present study and all three Calanus species had migrated down to depths for over wintering and did not show any changes in vertical distribution. However, in the Arctic Ocean pack ice at 82°N, Calanus hyperboreus, was found in high abundances (up to 65 ind. m−3) actively feeding on the Arctic bloom in September. They performed a classic DVM, feeding in the upper 50 m during the night and descending to depths below 50 m during the day. In Rijpfjorden, distinct DVM patterns were observed among the amphipod Themisto libellula, adult and juvenile stages of the pteropod Limacina helicina, and polar cod. Polar cod in Rijpfjorden fed on Calanus spp. and on L. helicina. We conclude that animals display DVM in the Arctic during autumn if they need to feed in food-rich surface waters.

• Macnaughton, Martin; Thormar, Jonas & Berge, Jørgen (2007). Sympagic amphipods in the Arctic pack ice: redescriptions of Eusirus holmii Hansen, 1887 and Pleusymtes karstensi (Barnard, 1959). Polar Biology.  ISSN 0722-4060.  30(8), s 1013- 1025 . doi: 10.1007/s00300-007-0260-8 Show summary

  During an expedition into the Arctic Ocean, in September 2004, six different species of amphipods were collected in the ice above 82°N. All six species (Apherusa glacialis, Gammarus wilkitzkii, Onisimus nanseni, O. glacialis, Pleusymtes karstensi and Eusirus holmii) were observed to be living adjacent to the sea ice or partly within its brine channels. The nature of the association with the ice for the last two species is uncertain, but the finding raises important questions regarding our knowledge of the sympagic fauna. Based on the obtained material, the two species E. holmii and P. karstensi are redescribed, and their association with the sea ice is discussed.

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• Andersen, Guri Sogn; Bekkby, Trine; Dolan, Margaret; Bøe, Reidulv; Thormar, Jonas; Buhl-Mortensen, Pål; Elvenes, Sigrid; Naustvoll, Lars Johan; Mjelde, Marit; Brandrud, Tor Erik; Rinde, Eli & Bryn, Anders (2019). Feltveileder for Kartlegging av marin naturvariasjon etter NiN (2.2.0).. Full text in Research Archive. Show summary

  Formålet med veilederen Veilederens hovedformål er å bidra til at resultatene av praktisk kartlegging i sjø i henhold til NiNs type og beskrivelsessystem blir så gode som mulig og sammenlignbare på tvers av kartleggere. Dette innebærer å beskrive hvordan, og i hvilken grad, den observerte naturvariasjonen bør forenkles under kartlegging. Veilederen skal oppsummere den kunnskapen som trengs for å kartlegge i sjø etter NiN, og i overenstemmelse med prinsippene som er omtalt i hovedveilederen (Bryn m. fl. 2018). Feltveilederen skal gi de generelle rammene for NiN-kartlegging i sjø, inkludert metodikk og verktøy, og har kartleggere som målgruppe. Denne feltveilederen dekker NiNs natursystemnivå med tilhørende type- og beskrivelsessystem for saltvannsbunnsystemer og marine vannmasser, og omfatter ikke andre deler av NiN. Veilederens Del D gir en beskrivelse av de ulike marine hovedtypene og miljøvariablene (LKMene) som definerer typeinndelingen. Denne delen gir også en veiledning til kartlegging av de ulike marine naturtypene på natursystemnivået for målestokkene 1:5 000, 1:20 000 og 1:100 000, i enkelte tilfeller også for målestokkene 1:500 og 1:2 500 (som er spesielt relevant for Fast fjærebeltebunn og evt. andre naturtyper som har liten arealutbredelse og som lar seg avgrense direkte i felt). Hovedveilederen (Bryn m. fl. (2018)) skisserer noen sentrale forutsetninger som en veileder for kartlegging av naturtyper avhenger av, blant annet at det finnes et type- og beskrivelsessystem som er tilpasset praktisk kartlegging. Det betyr at det må finnes tilstrekkelig erfaring med praktisk bruk av systemet. Disse forutsetningen er i all hovedsak ikke oppfylt for kartlegging i sjø. Det er derfor viktig å presisere at dette er en første-generasjons veileder for kartlegging i sjø etter NiN (versjon 2.2.0) på natursystemnivå. Etter hvert som denne veilederen testes i felt, vil erfaringer høstes og bidra til en videre utvikling og en revidering basert på nye erfaringer og evt. nye metoder som måtte utvikles.

• Dolan, Margaret; Bekkby, Trine; Buhl-Mortensen, Pål; Andersen, Guri Sogn; van Son, Thijs Christiaan; Thormar, Jonas; Tveiten, Lise Ann; Bøe, Reidulv; Storeng, Anne Britt; Bryn, Anders & Halvorsen, Rune (2019). Phasing in use of the “Nature in Norway” (NiN) system for classification and description of nature in the marine environment – experiences, challenges and international relevance..
• Bekkby, Trine; Espeland, Sigurd Heiberg; Dolan, Margaret; Rinde, Eli; Moy, Frithjof Emil; Elvenes, Sigrid; Gundersen, Hege; van Son, Thijs Christiaan; Andersen, Guri Sogn; Thormar, Jonas; Frigstad, Helene; Moy, Siri Røang; Beylich, Bjørnar; Albretsen, Jon; Naustvoll, Lars Johan & Tveiten, Lise Ann (2018). Pilotprosjekt - Kartlegging av marin natur i Møre og Romsdal: Årsrapport 2017. Full text in Research Archive.
• Dolan, Margaret; Bekkby, Trine; Espeland, Sigurd Heiberg; Rinde, Eli; Moy, Frithjof Emil; Elvenes, Sigrid; Gundersen, Hege; van Son, Thijs Christiaan; Andersen, Guri Sogn; Thormar, Jonas; Frigstad, Helene; Moy, Siri Røang; Beylich, Bjørnar; Albretsen, Jon; Naustvoll, Lars Johan & Tveiten, Lise Ann (2018). Pilot Project for Mapping Marine Nature Types within the NiN Framework, Coastal Norway.
• Thormar, Jonas (2017). Disturbance and trophic interactions in Scandinavian eelgrass ecosystems. Series of dissertations submitted to the Faculty of Mathematics and Natural Sciences, University of Oslo.. 1836.
• Thormar, Jonas; Steen, Henning; van Son, Thijs Christiaan; Bosgraaf, Sebastian; Christensen, Lene; Mellerud, Ida Kristin; Moy, Frithjof Emil & Norderhaug, Kjell Magnus (2017). Fish Assemblages in Coastal Vegetation.
• Andersen, A; Thormar, Jonas; Norderhaug, KM & Fredriksen, Stein (2013). Benthic communities at the opera in Bjørvika.
• Falk-Petersen, Stig; Wold, A; Røstad, A; Leu, E; Nygård, H; Gulliksen, Bjørn; Berge, Jørgen; Keskinen, E; Thormar, J. Gjaldbæk & Kwasniewski, S (2004). Intense feeding of Calanus hyperboreus on Arctic Autumn Bloom Propagated by a Record Minimum Sea Ice Extent in 2004.

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