Research interests

Population and Community Dynamics

Trophic and Foodweb Interactions (consumer-resource dynamics)

Teaching

BIO-3013 Northern food web ecology. Using the framework of food web to understand ecosystem structure and functioning, building on well-established ecological theory on trophic interactions (producer-consumer relations) between plants, herbivores and carnivores.

Publications in CRIStin


  • Marolla, Filippo; Aarvak, T.; Øien, Ingar J.; Mellard, Jarad Pope; Henden, John-André; Hamel, Sandra; Stien, Audun; Tveraa, Torkild; Yoccoz, Nigel Gilles; Ims, Rolf Anker. Assessing the effect of predator control on an endangered goose population subjected to predator-mediated food web dynamics. Journal of Applied Ecology 2019. ISSN 0021-8901.

  • Fuglei, Eva; Henden, John-André; Callahan, Chris T.; Gilg, Olivier; Hansen, Jannik; Ims, Rolf Anker; Isaev, Arkady P.; Lang, Johannes; McIntyre, Carol L.; Merizon, Richard A.; Mineev, Oleg Y.; Mineev, Yuri N.; Mossop, Dave; Nielsen, Olafur K.; Nilsen, Erlend Birkeland; Pedersen, Åshild Ønvik; Schmidt, Niels Martin; Sittler, Benoit; Willebrand, Maria Hørnell; Martin, Kathy. Circumpolar status of Arctic ptarmigan: Population dynamics and trends. Ambio 2019. ISSN 0044-7447.s doi: 10.1007/s13280-019-01191-0.

  • Soininen, Eeva M; Henden, John-André; Ravolainen, Virve; Yoccoz, Nigel Gilles; Bråthen, Kari Anne; Killengreen, Siw Turid; Ims, Rolf Anker. Transferability of biotic interactions: temporal consistency of arctic plant-rodent relationships is poor. Ecology and Evolution 2018; Volum 8. ISSN 2045-7758.s 9697 - 9711.s doi: 10.1002/ece3.4399.

  • Kleiven, Eivind Flittie; Henden, John-André; Ims, Rolf Anker; Yoccoz, Nigel Gilles. Seasonal difference in temporal transferability of an ecological model: near-term predictions of lemming outbreak abundances. Scientific Reports 2018; Volum 8 (1). ISSN 2045-2322.s doi: 10.1038/s41598-018-33443-6.

  • Soininen, Eeva M; Zinger, Lucie; Gielly, Ludovic; Yoccoz, Nigel Gilles; Henden, John-André; Ims, Rolf Anker. Not only mosses: lemming winter diets as described by DNA metabarcoding. Polar Biology 2017; Volum 40 (10). ISSN 0722-4060.s 2097 - 2103.s doi: 10.1007/s00300-017-2114-3.

  • Hudson, Lawrence N.; Newbold, Tim; Contu, Sara; Hill, Samantha L. L.; Lysenko, Igor; De Palma, Adriana; Phillips, Helen R. P.; Alhusseini, Tamera I.; Bedford, Felicity E.; Bennett, Dominic J.; Booth, Hollie; Burton, Victoria J.; Chng, Charlotte W. T.; Choimes, Argyrios; Correia, David L. P.; Day, Julie; Echeverría-Londoño, Susy; Emerson, Susan R.; Gao, Di; Garon, Morgan; Harrison, Michelle L. K.; Ingram, Daniel J.; Jung, Martin; Kemp, Victoria; Kirkpatrick, Lucinda; Martin, Callum D.; Pan, Yuan; Pask-Hale, Gwilym D.; Pynegar, Edwin L.; Robinson, Alexandra N.; Sanchez-Ortiz, Katia; Senior, Rebecca A.; Simmons, Benno I.; White, Hannah J.; Zhang, Hanbin; Aben, Job; Abrahamczyk, Stefan; Adum, Gilbert B.; Aguilar-Barquero, Virginia; Aizen, Marcelo A.; Albertos, Belén; Alcala, A. L.; Alguacil, Maria del Mar; Alignier, Audrey; Ancrenaz, Marc; Andersen, Alan N.; Arbeláez-Cortés, Enrique; Armbrecht, Inge; Arroyo-Rodriguez, Victor; Aumann, Tom; Axmacher, Jan C.; Azhar, Badrul; Azpiroz, Adrián B.; Baeten, Lander; Bakayoko, Adama; Báldi, András; Banks, John E.; Baral, Sharad K.; Barlow, Jos; Barratt, Barbara I. P.; Barrico, Lurdes; Bartolommei, Paola; Barton, Diane M.; Basset, Yves; Batáry, Péter; Bates, Adam J.; Baur, Bruno; Bayne, Erin M.; Beja, Pedro; Benedick, Suzan; Berg, Åke; Bernard, Henry; Berry, Nicholas J.; Bhatt, Dinesh; Bicknell, Jake E.; Bihn, Jochen H.; Blake, Robin J.; Bobo, Kadiri S.; Bóçon, Roberto; Boekhout, Teun; Böhning-Gaese, Katrin; Bonham, Kevin J.; Borges, Paulo A. V.; Borges, Sérgio H.; Boutin, Celine; Henden, John-André; Måren, Inger Elisabeth; Sheil, Douglas. The database of the PREDICTS (Projecting Responses of Ecological Diversity In Changing Terrestrial Systems) project. Ecology and Evolution 2017; Volum 7. ISSN 2045-7758.s 145 - 188.s doi: 10.1002/ece3.2579.

  • Henden, John-André; Ims, Rolf Anker; Fuglei, Eva; Pedersen, Åshild Ønvik. Changed Arctic-alpine food web interactions under rapid climate warming: implication for ptarmigan research. Wildlife Biology 2017; Volum 2017. ISSN 0909-6396.s doi: 10.2981/wlb.00240.

  • Ims, Rolf Anker; Killengreen, Siw Turid; Ehrich, Dorothee; Flagstad, Øystein; Hamel, Sandra; Henden, John-André; Jensvoll, Ingrid; Yoccoz, Nigel Gilles. Ecosystem drivers of an Arctic fox population at the western fringe of the Eurasian Arctic. Polar Research 2017; Volum 36 (8). ISSN 0800-0395.s 1 - 13.s doi: 10.1080/17518369.2017.1323621.

  • Barraquand, Frederic; Høye, Toke T.; Henden, John-André; Yoccoz, Nigel; Gilg, Olivier; Schmidt, Niels Martin; Sittler, Benoit; Ims, Rolf Anker. Demographic responses of a site-faithful and territorial predator to its fluctuating prey: Long-tailed skuas and arctic lemmings. (data) Journal of Animal Ecology 2014; Volum 83 (2). ISSN 0021-8790.s 375 - 387.s doi: 10.1111/1365-2656.12140.

  • Hudson, Lawrence N.; Newbold, Tim; Contu, Sara; Hill, Samantha L. L.; Lysenko, Igor; Palma, Adriana De; Phillips, Helen R. P.; Senior, Rebecca A.; Bennett, Dominic J.; Booth, Hollie; Choimes, Argyrios; Correia, David L. P.; Day, Julie; Echeverría-Londoño, Susy; Garon, Morgan; Harrison, Michelle L. K.; Ingram, Daniel J.; Jung, Martin; Kemp, Victoria; Kirkpatrick, Lucinda; Martin, Callum D.; Pan, Yuan; White, Hannah J.; Aben, Job; Abrahamczyk, Stefan; Adum, Gilbert B.; Aguilar-Barquero, Virginia; Aizen, Marcelo A.; Ancrenaz, Marc; Arbeláez-Cortés, Enrique; Armbrecht, Inge; Azhar, Badrul; Azpiroz, Adrián B.; Baeten, Lander; Báldi, András; Banks, John E.; Barlow, Jos; Batary, Peter; Bates, Adam J.; Bayne, Erin M.; Beja, Pedro; Berg, Åke; Berry, Nicholas J.; Bicknell, Jake E.; Bihn, Jochen H.; Böhning-Gaese, Katrin; Boekhout, Teun; Boutin, Celine; Bouyer, Jeremy; Brearley, Francis Q.; Brito, Isabel; Brunet, Jörg; Buczkowski, Grzegorz; Buscardo, Erika; Cabra-Garcia, Jimmy; Calvino-Cancela, Maria; Cameron, Sydney A.; Cancello, Eliana M.; Carrijo, Tiago F.; Carvalho, Anelena L.; Castro, Helena; Castro-Luna, Alejandro A.; Cerda, Rolando; Cerezo, Alexis; Chauvat, Matthieu; Clarke, Frank M.; Cleary, Daniel F.R.; Connop, Stuart P.; D'Aniello, Biagio; da Silva, Pedro Giovani; Darvill, Ben; Dauber, Jens; Dejean, Alain; Diekotter, Tim; Dominguez-Haydar, Yamileth; Dormann, Carsten F.; Dumont, Bertrand; Dures, Simon G.; Dynesius, Mats; Edenius, Lars; Elek, Zoltán; Entling, Martin H.; Farwig, Nina; Fayle, Tom M.; Felicioli, Antonio; Felton, Annika M.; Ficetola, Gentile F.; Filgueiras, Bruno K.C.; Fonte, Steven J.; Fraser, Lauchlan H.; Fukuda, Daisuke; Furlani, Dario; Ganzhorn, Jörg U.; Garden, Jenni G.; Gheler-Costa, Carla; Giordani, Paolo; Giordano, Simonetta; Gottschalk, Marco S.; Goulson, Dave; Gove, Aaron D.; Grogan, James; Hanley, Mick E.; Hanson, Thor; Hashim, Nor R.; Hawes, Joseph E.; Hebert, Christian; Helden, Alvin J.; Henden, John-André; Hernandez, Lionel; Herzog, Felix; Higuera-Diaz, Diego; Hilje, Branko; Horgan, Finbarr G.; Horvath, Roland; Hylander, Kristoffer; Isaacs-Cubides, Paola; Ishitani, Masahiro; Jacobs, Carmen T.; Jaramillo, Victor J.; Jauker, Birgit; Jonsell, Mats; Jung, Thomas S.; Kapoor, Vena; Kati, Vassiliki; Katovai, Eric; Kessler, Michael; Knop, Eva; Kolb, Anette; Korösi, Adam; Lachat, Thibault; Lantschner, Victoria; Le Feon, Violette; LeBuhn, Gretchen; Legare, Jean-Philippe; Letcher, Susan G.; Littlewood, Nick A.; Lopez-Quintero, Carlos A.; Louhaichi, Mounir; Lövei, Gabor L.; Lucas-Borja, Manuel Esteban; Luja, Victor H.; Maeto, Kauro; Magura, Tibor; Mallari, Neil Aldrin; Marin-Spiotta, Erika; Marshall, E.J.P.; Martinez, Eliana; Mayfield, Margaret M.; Mikusinski, Grzegorz; Milder, Jeffrey C.; Miller, James R.; Morales, Carolina L.; Muchane, Mary N.; Muchane, Muchai; Naidoo, Robin; Nakamura, Akihiro; Naoe, Shoji; Nates-Parra, Guiomar; Navarrete Gutierrez, Dario A.; Neuschulz, Eike L.; Noreika, Norbertas; Norfolk, Olivia; Noriega, Jorge Ari; Nöske, Nicole M.; O'Dea, Niall; Oduro, William; Ofori-Boateng, Caleb; Oke, Chris O.; Osgathorpe, Lynne M.; Paritsis, Juan; Parra-H, Alejandro; Pelegrin, Nicolas; Peres, Carlos A.; Persson, Anna S.; Petanidou, Theodora; Phalan, Ben; Philips, Keith; Poveda, Katja; Power, Eileen F.; Presley, Steven J.; Proenca, Vania; Quaranta, Marino; Quintero, Carolina; Redpath-Downing, Nicola A.; Reid, J. Leighton; Reis, Yana T.; Ribeiro, Danilo B.; Richardson, Barbara A.; Richardson, Michael J.; Robles, Carolina A.; Römbke, Jörg; Romero-Duque, Luz Piedad; Roselli, Loreta; Rossiter, Stephen J.; Roulston, T'ai H.; Rousseau, Laurent; Sadler, Jonathan P.; Safian, Szabolcs; Saldana-Vasquez, Romeo A.; Samnegård, Ulrika; Schüepp, Christof; Schweiger, Oliver; Sedlock, Jodi L.; Shahabuddin, Ghazala; Sheil, Douglas; Silva, Fernando A.B.; Slade, Eleanor M.; Smith-Pardo, Allan H.; Sodhi, Navjot S.; Somarriba, Eduardo J.; Sosa, Ramon A.; Stout, Jane C.; Struebig, Matthew J.; Sung, Yik-Hei; Threlfall, Caragh G.. The PREDICTS database: a global database of how local terrestrial biodiversity responds to human impacts. Ecology and Evolution 2014; Volum 4 (24). ISSN 2045-7758.s 4701 - 4735.s doi: 10.1002/ece3.1303.

  • Henden, John-André; Stien, Audun; Bårdsen, Bård-Jørgen; Yoccoz, Nigel Gilles; Ims, Rolf Anker. Community-wide mesocarnivore response to partial ungulate migration. (data) Journal of Applied Ecology 2014; Volum 51 (6). ISSN 0021-8901.s 1525 - 1533.s doi: 10.1111/1365-2664.12328.

  • Hamel, Sandra; Killengreen, Siw Turid; Henden, John-André; Eide, Nina Elisabeth; Rød-Eriksen, Lars; Ims, Rolf Anker; Yoccoz, Nigel. Towards good practice guidance in using camera-traps in ecology: influence of sampling design on validity of ecological inferences. Methods in Ecology and Evolution 2013; Volum 4 (2). ISSN 2041-210X.s 105 - 113.s doi: 10.1111/j.2041-210x.2012.00262.x.

  • Ims, Rolf Anker; Henden, John-André; Thingnes, Anders Voss; Killengreen, Siw Turid. Indirect food web interactions mediated by rodent cycles: Relative roles of lemmings and voles. (data) Biology Letters 2013; Volum 9 (6). ISSN 1744-9561.s doi: 10.1098/rsbl.2013.0802.

  • Henden, John-André; Yoccoz, Nigel; Ims, Rolf Anker; Langeland, Knut. How spatial variation in areal extent and configuration of labile vegetation states affect the riparian bird community in Arctic Tundra. (data) PLoS ONE 2013; Volum 8 (5). ISSN 1932-6203.s doi: 10.1371/journal.pone.0063312.

  • Soininen, Eeva Marjatta; Zinger, Lucie; Gielly, Ludovic; Bellemain, Eva; Bråthen, Kari Anne; Brochmann, Christian; Epp, Laura; Gusarova, Galina; Hassel, Kristian; Henden, John-André; Killengreen, Siw Turid; Rämä, Teppo; Stenøien, Hans; Yoccoz, Nigel; Ims, Rolf Anker. Shedding new light on the diet of Norwegian lemmings: DNA metabarcoding of stomach content. Polar Biology 2013; Volum 36 (7). ISSN 0722-4060.s 1069 - 1076.s doi: 10.1007/s00300-013-1328-2.

  • Hamel, Sandra; Killengreen, Siw Turid; Henden, John-André; Yoccoz, Nigel; Ims, Rolf Anker. Disentangling the importance of interspecific competition, food availability, and habitat in species occupancy: Recolonization of the endangered Fennoscandian arctic fox. Biological Conservation 2013; Volum 160. ISSN 0006-3207.s 114 - 120.s doi: 10.1016/j.biocon.2013.01.011.

  • Ehrich, Dorothee; Henden, John-André; Ims, Rolf Anker; Doronina, Lilyia O; Killengreen, Siw Turid; Lecomte, Nicolas; Pokrovsky, Ivan; Skogstad, Gunhild; Sokolov, Alexander A.; Sokolov, Vasily A.; Yoccoz, Nigel. The importance of willow thickets for ptarmigan and hares in shrub tundra: the more the better?. Oecologia 2012; Volum 168 (1). ISSN 0029-8549.s 141 - 151.s doi: 10.1007/s00442-011-2059-0.

  • Menyushina, Irina; Ehrich, Dorothee; Henden, John-André; Ims, Rolf Anker; Ovsyanikov, N. The nature of lemming cycles on Wrangel: an island without small mustelids. Oecologia 2012; Volum 170 (2). ISSN 0029-8549.s 363 - 371.s doi: 10.1007/s00442-012-2319-7.

  • Ims, Rolf Anker; Henden, John-André. Collapse of an arctic bird community resulting from ungulate-induced loss of erect shrubs. Biological Conservation 2012; Volum 149 (1). ISSN 0006-3207.s 2 - 5.s doi: 10.1016/j.biocon.2012.02.008.

  • Henden, John-Andre; Ims, Rolf Anker; Yoccoz, Nigel; Sørensen, Raymond; Killengreen, Siw Turid. Population dynamics of tundra voles in relation to configuration of willow thickets in southern arctic tundra. Polar Biology 2011; Volum 34 (4). ISSN 0722-4060.s 533 - 540.s doi: 10.1007/s00300-010-0908-7.

  • Ravolainen, Virve; Bråthen, Kari Anne; Ims, Rolf Anker; Yoccoz, Nigel; Henden, John-André; Killengreen, Siw Turid. Rapid, landscape scale responses in riparian tundra vegetation to exclusion of small and large mammalian herbivores. Basic and Applied Ecology 2011; Volum 12 (8). ISSN 1439-1791.s 643 - 653.s doi: 10.1016/j.baae.2011.09.009.

  • Henden, John-André; Ims, Rolf Anker; Yoccoz, Nigel; Killengreen, Siw Turid. Declining willow ptarmigan populations: The role of habitat structure and community dynamics. Basic and Applied Ecology 2011; Volum 12 (5). ISSN 1439-1791.s 413 - 422.s doi: 10.1016/j.baae.2011.05.006.

  • Bårdsen, Bård-Jørgen; Henden, John-Andre; Fauchald, Per; Tveraa, Torkild; Stien, Audun. Plastic reproductive allocation as a buffer against environmental stochasticity - linking life history and population dynamics to climate. Oikos 2011; Volum 120 (2). ISSN 0030-1299.s 245 - 257.s doi: 10.1111/j.1600-0706.2010.18597.x.

  • Henden, John-Andre; Ims, Rolf Anker; Yoccoz, Nigel Gilles; Hellström, Peter; Angerbjörn, Anders. Strength of asymmetric competition between predators in food webs ruled by fluctuating prey: the case of foxes in tundra. Oikos 2010; Volum 119 (1). ISSN 0030-1299.s 27 - 34.s doi: 10.1111/j.1600-0706.2009.17604.x.

  • Henden, John-Andre; Ims, Rolf Anker; Yoccoz, Nigel Gilles. Nonstationary spatio-temporal small rodent dynamics: evidence from long-term Norwegian fox bounty data. Journal of Animal Ecology 2009; Volum 78 (3). ISSN 0021-8790.s 636 - 645.s doi: 10.1111/j.1365-2656.2008.01510.x.

  • Hanssen, Sveinn Are; Bustnes, Jan Ove; Tveraa, Torkild; Hasselquist, Dennis; Varpe, Øystein; Henden, John-Andre. Individual quality and reproductive effort mirrored in white wing plumage in both sexes of south polar skuas. Behavioral Ecology 2009; Volum 20 (5). ISSN 1045-2249.s 961 - 966.s doi: 10.1093/beheco/arp084.

  • Henden, John-Andre; Yoccoz, Nigel Gilles; Ims, Rolf Anker; Bårdsen, Bård-Jørgen; Angerbjörn, Anders. Phase-dependent effect of conservation efforts in cyclically fluctuating populations of arctic fox (Vulpes lagopus). Biological Conservation 2009; Volum 142 (11). ISSN 0006-3207.s 2586 - 2592.s doi: 10.1016/j.biocon.2009.06.005.

  • Ims, Rolf Anker; Henden, John-Andre; Killengreen, Siw turid. Collapsing population cycles. Trends in Ecology & Evolution 2008; Volum 23. ISSN 0169-5347.s 79 - 86.s doi: 10.1016/j.tree.2007.10.010.

  • Henden, John-Andre; Bardsen, BJ; Yoccoz, Nigel Gilles; Ims, Rolf Anker. Impacts of differential prey dynamics on the potential recovery of endangered arctic fox populations. Journal of Applied Ecology 2008; Volum 45. ISSN 0021-8901.s 1086 - 1093.s doi: 10.1111/j.1365-2664.2008.01515.x.

  • Killengreen, Siw turid; Ims, Rolf Anker; Yoccoz, Nigel Gilles; Bråthen, Kari Anne; Henden, John-Andre; Schott, Tino. Structural characteristics of a low Arctic tundra ecosystem and the retreat of the Arctic fox. Biological Conservation 2007; Volum 135 (4). ISSN 0006-3207.s 459 - 472.s doi: 10.1016/j.biocon.2006.10.039.

  • Bustnes, Jan Ove; Tveraa, Torkild; Varpe, Øystein; Henden, John-Andre; Skaare, Janneche Utne. Reproductive performance and organochlorine pollutants in an Antarctic marine top predator: The south polar skua. Environment International 2007; Volum 33. ISSN 0160-4120.s doi: 10.1016/j.envint.2007.04.010.

  • Bustnes, Jan Ove; Tveraa, Torkild; Henden, John-Andre; Varpe, Øystein; Janssen, Kirstin; Skaare, Janneche Utne. Organochlorines in Antarctic and Arctic Avian Top Predators: A Comparison between the South Polar Skua and Two Species of Northern Hemisphere Gulls. Environmental Science and Technology 2006; Volum 40 (8). ISSN 0013-936X.s 2826 - 2831.s doi: 10.1021/es051920q.

  • Weimerskirch, Henri; Chastel, Olivier; Cherel, Yves; Henden, John-Andre; Tveraa, Torkild. Nest attendance and foraging movements of northern fulmars rearing chicks at Bjørnøya Barents Sea. Polar Biology 2001; Volum 24 (2). ISSN 0722-4060.s 83 - 88.

  • Marolla, Filippo; Aarvak, Tomas; Øien, Ingar J.; Mellard, Jarad Pope; Henden, John-André; Hamel, Sandra; Stien, Audun; Tveraa, Torkild; Yoccoz, Nigel Gilles; Ims, Rolf Anker. The need of evidence-based management: the case of the of the Lesser White-Fronted Goose in Northern Norway. European Congress of Conservation Biology 2018-06-12 - 2018-06-15 2018.

  • Marolla, Filippo; Aarvak, Tomas; Øien, Ingar J.; Mellard, Jarad Pope; Henden, John-André; Hamel, Sandra; Stien, Audun; Tveraa, Torkild; Yoccoz, Nigel Gilles; Ims, Rolf Anker. Contrasting effect of small rodents and reindeer carcasses on an endangered Arctic-nesting goose species: implications for management. Nordic Oikos Meeting 2018-02-19 - 2018-02-22 2018.

  • Henden, John-André. Arctic terrestrial ecosystems under climate change - arctic ptarmigans and species invasions.. Green Belt of Fennoscandia 2015-06-25 - 2015-06-26 2015.

  • Ims, Rolf Anker; Killengreen, Siw Turid; Ehrich, Dorothee; Jensvoll, Ingrid; Yoccoz, Nigel Gilles; Henden, John-André; Mørk, Torill; Sarre, Arne Petter; Ørjebu, Alfred; Bye, Åshild. Fjellrev i Finnmark: Årsrapport 2014. 2015.

  • Henden, John-André. Arktiske økosystemer i et klima i rask endring: Implikasjoner for Forskning på Rype. Naturdata - vViltkonferanse 2015-11-05 - 2015-11-06 2015.

  • Henden, John-André. Status of Norwegian Arctic Tundra. How will COAT contribute to improve our understanding of current and projected anthropogenic threats?. Tundra Conservation Network 2014-02-10 - 2014-02-13 2014.

  • Stien, Audun; Bråthen, Kari Anne; Cooper, Elisabeth J.; Ehrich, Dorothee; Hausner, Vera Helene; Henden, John-André; Ims, Rolf Anker; Jensvoll, Ingrid; Killengreen, Siw Turid; Ravolainen, Virve; Yoccoz, Nigel Gilles; Biuw, Martin; Fauchald, Per; Jepsen, Jane Uhd; Tombre, Ingunn; Tveraa, Torkild; Fuglei, Eva; Kohler, Jack; Pedersen, Åshild Ø.; Coulson, Steve; Eidesen, Pernille Bronken; Müller, Eike; Tveito, Ole Einar; Madsen, Jesper. COAT - Climate- ecological Observatory for Arctic Tundra. Biodiversity and ecosystem services in a changing environment : Challenges for science and conservation 2013-03-14 - 2013-03-14 2013.

  • Killengreen, Siw Turid; Hamel, Sandra; Henden, John-André; Ehrich, Dorothee; Yoccoz, Nigel Gilles; Ims, Rolf Anker. An ecosystem approach for monitoring and management of the arctic fox. The 4th International Conference on Arctic Fox 2013-10-10 - 2013-10-13 2013.

  • Ims, Rolf Anker; Killengreen, Siw Turid; Jensvoll, Ingrid; Yoccoz, Nigel Gilles; Henden, John-André; Arriola, Aline; Mørk, Torill; Sarre, Arne Petter; Ørjebu, Alfred; Kristoffersen, Bjørn Hugo; Bye, Åshild. Fjellrev i Finnmark:Årsrapport 2013. 2013.

  • Killengreen, Siw Turid; Ims, Rolf Anker; Henden, John-André; Yoccoz, Nigel Gilles; Ehrich, Dorothee. Prosjekt “Fjellrev i Finnmark” Rapport for 2008-2012. 2013.

  • Henden, John-André. New monitoring of Lemming winter dynamics by use of fecal pellet counts in snowbeds. Lemming Snow 2013-12-05 - 2013-12-06 2013.

  • Henden, John-André. KOAT - Økosystembasert, adaptiv overvåkning av Norsk Arktisk Tundra. Nasjonalt Rypeforvaltningsseminar 2013-05-29 - 2013-05-30 2013.

  • Hamel, Sandra; Killengreen, Siw Turid; Henden, John-André; Yoccoz, Nigel; Ims, Rolf Anker. Camera-traps, sampling design, and the recolonization of the arctic fox in northern Norway. Norwegian Ecological Society Conference 2013-03-13 - 2013-03-15 2013.

  • Henden, John-André. Effects of Increased Reindeer Abundance in Finnmark: An Ecosystem Approach. APECS-FRAM webinar 2013-03-07 - 2013-03-07 2013.

  • Henden, John-André. COAT - Long-term adaptive monitoring of Ptarmigan in Norwegian Arctic Tundra. Grouse Monitoring/Management Network 2013-03-26 - 2013-03-28 2013.

  • Henden, John-André. COAT - Climate ecological Observatory for Arctic Tundra. Grouse Monitoring/Management Network 2013-03-26 - 2013-03-28 2013.

  • Henden, John-André; Ims, Rolf Anker; Yoccoz, Nigel; Stien, Audun; Bårdsen, Bård-Jørgen. EcoFinn: Betydningen av reinsdyr abundans for tilstedeværelse og rikhet av predatorsamfunnet på fjellet. Fjellrev i Finnmark, Referansemøte 2013-01-23 - 2013-01-24 2013.

  • Hamel, Sandra; Killengreen, Siw Turid; Henden, John-André; Yoccoz, Nigel; Ims, Rolf Anker. Evaluering av rekolonisering av den truede fennoskandiske fjellreven ved bruk av fotobokser. Fjellrev i Finnmark prosjekt 2013-01-23 - 2013-01-24 2013.

  • Bråthen, Kari Anne; Ims, Rolf Anker; Yoccoz, Nigel; Ravolainen, Virve; Henden, John-André; Killengreen, Siw Turid; Stien, Audun. Reindeer husbandry’s effects on biodiversity. Reindeer husbandry as a resource for the society Present contribution and future possibilities 2012-12-03 - 2012-12-04 2012.

  • Ravolainen, Virve; Bråthen, Kari Anne; Soininen, Eeva Marjatta; Kollstrøm, Julie; Stien, Audun; Killengreen, Siw Turid; Henden, John-André; Yoccoz, Nigel; Ims, Rolf Anker. Tall shrub tundra vegetation and drivers of change. Arctic Net Annual scientific meeting 2012 2012-12-10 - 2012-12-14 2012.

  • Hamel, Sandra; Killengreen, Siw Turid; Henden, John-André; Yoccoz, Nigel; Ims, Rolf Anker. Disentangling the importance of interspecific competition and food availability in species occupancy: recolonization of the endangered Fennoscandian arctic fox. Fagdag, AMB, UiT 2012-11-21 - 2012.

  • Henden, John-André. Ecosystem effects of increased reindeer abundance in Finnmark. Fagdagen 2012 2012-11-21 - 2012-11-21 2012.

  • Henden, John-André; Yoccoz, Nigel; Ims, Rolf Anker. Understanding long term changes in tundra food webs: the challenge of integrating study designs and models. Tundra Change Conferance 2012-11-05 - 2012-11-07 2012.

  • Henden, John-André. KOAT - Modul for overvåkning og forvaltning av rype på fastlandet. Rypeseminar 2012-06-04 - 2012-06-06 2012.

  • Henden, John-André. KOAT - bakgrunn og visjoner. Rypeseminar 2012-06-04 - 2012-06-06 2012.

  • Henden, John-André. Klima-økologisk Observatorie for Arktisk Tundra - Modul for overvåkning og forvaltning av rype på fastlandet. FEFO-møte 2012-05-15 - 2012.

  • Ims, Rolf Anker; Killengreen, Siw Turid; Jensvoll, Ingrid; Henden, John-André; Hamel, Sandra; Mørk, Torill; Sarre, Arne Petter; Ørjebu, Alfred; Bye, Åshild; Knutsen, Kjartan. Fjellrev i Finnmark: Årsrapport 2011. 2011.

  • Henden, John-Andre. Hva kan studier av nordlige økosystemer si oss om mulige effekter av klimaforandringen. Forskningsdagene 2010, Forskermaraton 2010-09-24 - 2010.

  • Ims, Rolf Anker; Killengreen, Siw Turid; Jensvoll, Ingrid; Yoccoz, Nigel; Henden, John-André; Mørk, Torill; Sarre, Arne Petter; Ørjebu, Alfred; Bye, Åshild. Fjellrev i Finnmark: Årsrapport 2010. 2010.

  • Lecomte, Nicolas; Ehrich, Dorothee; Yoccoz, Nigel; Ims, Rolf Anker; Fuglei, Eva; Steen, Harald; Killengreen, Siw Turid; Henden, John-Andre. Metamorphosis of the arctic terrestrial food webs: between collapse of native species and explosion of exotic predators?. Oslo Science Conference 2010-06-07 - 2010-06-13 2010.

  • Henden, John-Andre. Phase-dependent effect of conservation efforts on populations of Arctic fox (Vulpes lagopus), a modeling approach. Arctic fox conference 2009-02-16 - 2009-02-19 2009.

  • Ims, Rolf Anker; Killengreen, Siw Turid; Jensvoll, Ingrid; Yoccoz, Nigel Gilles; Henden, John-Andre; Mørk, Torill; Sarre, Arne Petter; Ørjebu, Alfred; Knutsen, Kjartan. Fjellrev i Finnmark: Årsrapport 2009. 2009.

  • Ims, Rolf Anker; Killengreen, Siw Turid; Yoccoz, Nigel Gilles; Henden, John-Andre; Mørk, Torill; Sarre, Arne Petter; Ørjebu, Alfred; Knutsen, Kjartan. Fjellrev i Finnmark: Årsrapport for 2008. 2008.

  • Ims, Rolf Anker; Killengreen, Siw Turid; Henden, John-Andre; Yoccoz, Nigel Gilles. Prosjekt "Fjellrev i Finnmark" Rapport for perioden 2004-2007. 2007.

  • Ims, Rolf Anker; Killengreen, Siw Turid; Henden, John-Andre; Ravolainen, Virve; Mørk, Torill; Langeland, Knut; Knutsen, Kjartan. Fjellrev i Finnmark: Forskning og tiltak 2006. 2006.

  • Ims, Rolf Anker; Killengreen, Siw Turid; Yoccoz, Nigel Gilles; Henden, John-Andre; Ravolainen, Virve; Skog, Elin; Scheie, Jon Ove; Mørk, Torill; Langeland, Knut. Fjellrev i Finnmark: Forskning og tiltak 2005. 2005.

  • Member of research group