Browsing NINA Brage by Author "Hofgaard, Annika"

Now showing items 1-20 of 49

    • Aerospace mapping of the status and position of northern forest limit 

      Kravtsova, Valentina I.; Tutubalina, Olga; Hofgaard, Annika (Peer reviewed; Journal article, 2012)
      We study changes in the position of the northern forest limit and state of vegetation in the taiga-tundra ecotone through aerial and satellite imagery in the context of climate variability and of the projected advance of ...

    • Assessing the resilient provision of ecosystem services by social-ecological systems: introduction and theory 

      Sarkki, Simo; Ficko, Andrej; Wielgolaski, Frans Emil; Abraham, Eleni M.; Bratanova-Doncheva, Svetla; Grunewald, Karsten; Hofgaard, Annika; Holtmeier, Friedrich-Karl; Kyriazopoulos, Apostolos P.; Broll, Gabriele; Nijnik, Maria; Sutinen, Marja-Liisa (Journal article; Peer reviewed, 2017)

    • BioTIME: A database of biodiversity time series for the Anthropocene 

      Dornelas, Maria; Antao, Laura H.; Moyes, Faye; Bates, Amanda E.; Magurran, Anne E.; Adam, Dusan; Akhmetzhanova, Asem A.; Appeltans, Ward; Arcos, Jose Manuel; Arnold, Haley; Ayyappan, Narayanan; Badihi, Gal; Baird, Andres H.; Barbosa, Miguel; Barreto, Tiago Egydio; Bässler, Claus; Bellgrove, Alecia; Belmaker, Jonathan; Benedetti-Cecchi, Lisandro; Bett, Brian J.; Bjorkman, Anne D.; Błazewicz, Magdalena; Blowes, Shane A.; Bloch, Christopher P.; Bonebrake, Timothy C.; Boyd, Susan; Bradford, Matt; Brooks, Andrew J.; Brown, James H.; Bruelheide, Helge; Budy, Phaedra; Carvalho, Fernando; Castaneda-Moya, Edward; Chen, Chaolun Allen; Chamblee, John F.; Chase, Tory J.; Collier, Laura Siegwart; Cooper, Elisabeth J.; Cornelissen, J. Hans C.; Cotano, Unai; Crow, Shannan Kyle; Damasceno, Gabriella; Davies, Claire H.; Davis, Robert A.; Day, Frank P.; Degraer, Steven; Doherty, Tim S.; Dunn, Timothy E.; Durigan, Giselda; Hofgaard, Annika; Johannessen, Tore; Klanderud, Kari; Knutsen, Halvor; Olsen, Esben Moland (Journal article; Peer reviewed, 2018)

    • Bruk av fjernmåling i palsmyrovervåking 

      Lauknes, Tom Rune; Larsen, Yngvar; Høgda, Kjell-Arild; Tømmervik, Hans; Hofgaard, Annika (NINA rapport;803, Research report, 2012)
      Lauknes, T.R., Larsen, Y., Høgda, K.A., Tømmervik, H. & Hofgaard, A. 2012. Bruk av fjernmåling i palsmyrovervåking. – NINA Rapport 803. 38 s. Et fjernmålingsbasert pilotstudium som bruker flybilder, satellittbilder med ...

    • Circum-Arctic distribution of chemical anti-herbivore compounds suggests biome-wide trade-off in defence strategies in Arctic shrubs 

      Lindén, Elin; te Beest, Mariska; Aubreu, Ilka; Moritz, Thomas; Sundqvist, Maja K.; Barrio, Isabel C.; Boike, Julia; Bryant, John P.; Bråthen, Kari Anne; Buchwal, Agata; Bueno, C. Guillermo; Currier, Alain; Egelkraut, Dagmar Dorothea; Forbes, Bruce C.; Hallinger, Martin; Heijmans, Monique; Hermanutz, Luise; Hik, David S.; Hofgaard, Annika; Holmgren, Milena; Huebner, Diane C.; Høye, Toke T.; Jónsdóttir, Ingibjörg S.; Kaarlejärvi, Elina; Kissler, Emilie; Kumpula, Timo; Limpens, Juul; Myers-Smith, Isla H.; Normand, Signe; Post, Eric; Rocha, Adrian V.; Schmidt, Niels Martin; Skarin, Anna; Soininen, Eeva M; Sokolov, Aleksandr; Sokolova, Natalia; Speed, James David Mervyn; Street, Lorna E.; Tananaev, Nikita; Tremblay, Jean-Pierre; Urbanowicz, Christine; Watts, David A.; Zimmermann, Heike H.; Olofsson, Johan (Peer reviewed; Journal article, 2022)
      Spatial variation in plant chemical defence towards herbivores can help us understand variation in herbivore top–down control of shrubs in the Arctic and possibly also shrub responses to global warming. Less defended, ...

    • Delineation of the forest-tundra ecotone using texture-based classification of satellite imagery 

      Guo, Wenkai; Rees, Gareth; Hofgaard, Annika (Peer reviewed; Journal article, 2020)
      The transition zone between the boreal forest and Arctic tundra, the forest-tundra ecotone (FTE), is an area of high ecological and climatological significance. Despite its importance, a globally consistent high spatial ...

    • Drivers of treeline shift in different European mountains 

      Cudlin, Pavel; Klopcic, Matija; Tognetti, Roberto; Mális, Frantisek; Alados, Concepcion L.; Bebi, Peter; Grunewald, Karsten; Zhiyanski, Miglena; Andonowski, Vlatko; La Porta, Nicola; Bratanova-Doncheva, Svetlana; Kachaunova, Eli; Edwards-Jonášová, Magda; Ninot, Josep Maria; Rigling, Andreas; Hofgaard, Annika; Hlásny, Tomáš; Skalák, Petr; Wielgolaski, Frans Emil (Journal article; Peer reviewed, 2017)
      A growing body of evidence suggests that processes of upward treeline expansion and shifts in vegetation zones may occur in response to climate change. However, such shifts can be limited by a variety of non-climatic ...

    • Effects of climate change on the distribution and development of palsa peatlands: background and suggestions for a national monitoring project 

      Hofgaard, Annika (NINA Project Report;21, Research report, 2003)
      Hofgaard, A. Effects of climate change on the distribution and development of palsa peatlands: background and suggestions for a national monitoring project. NINA Project Report 21. 32pp. Anticipated global warming trend ...

    • Effekter av treslagsskifte, treplanting og nitrogengjødsling i skog på biologisk mangfold. Kunnskapsgrunnlag for å vurdere skogtiltak i klimasammenheng 

      Aarrestad, Per Arild; Bendiksen, Egil; Bjerke, Jarle Werner; Brandrud, Tor Erik; Hofgaard, Annika; Rusch, Graciela; Stabbetorp, Odd Egil (NINA Rapport;959, Research report, 2013-03)
      Som oppfølging av St. meld. 21 Norsk klimapolitikk (2011-2012) vurderer regjeringen ulike tiltak for å nå målet om et nettoutslipp av klimagasser innen 2030. I denne sammenheng skal Klima og forurensingsdepartementet (Klif), ...

    • Etablering av overvåkingsprosjekt på palsmyrer 

      Hofgaard, Annika (NINA Oppdragsmelding;841, Research report, 2004)
      Hofgaard, A. 2004. Etablering av overvåkingsprosjekt på palsmyrer. - NINA Oppdragsmelding 841. 32pp. Behovet for overvåking av sårbare økosystem har økt i takt med den forventede globale oppvarmingstrenden, og da spesielt ...

    • Forests dynamics in the montane–alpine boundary: a comparative study using satellite imagery and climate data 

      Dinca, Lucian; Nita, Mihai Daniel; Hofgaard, Annika; Alados, Concepcion L.; Broll, Gabriele; Borz, Stelian Alexandru; Wertz, Bogdan; Monteiro, Antonio T. (Journal article; Peer reviewed, 2017)
      Over the past decades, the altitudinal and latitudinal advance of forest lines has increased due to global warming and the abandonment of less productive areas previously subject to agricultural activities. The intensity ...

    • Global fading of the temperature–growth coupling at alpine and polar treelines 

      Camarero, Jesús Julio; Gazol, Antonio; Sánchez-Salguero, Raúl; Fajardo, Alex; McIntire, Eliot J. B.; Gutiérrez, Emilia; Batllori, Enric; Boudreau, Stephane; Carrer, Marco; Diez, Jeff; Dufour-Tremblay, Geneviève; Gaire, Narayan P.; Hofgaard, Annika; Jomelli, Vincent; Kirdyanov, Alexander V.; Lévesque, Esther; Liang, Eryuan; Linares, Juan Carlos; Mathisen, Ingrid Ertshus; Moiseev, Pavel A.; Sangüesa-Barreda, Gabriel; Shrestha, Krishna B.; Toivonen, Johanna M.; Tutubalina, Olga V.; Wilmking, Martin (Peer reviewed; Journal article, 2021)
      Climate warming is expected to positively alter upward and poleward treelines which are controlled by low temperature and a short growing season. Despite the importance of treelines as a bioassay of climate change, a global ...

    • Grazing and warming effects on shrub growth and plant 

      Løkken, Jørn Olav; Hofgaard, Annika; Dalen, Linda; Hytteborn, Håkan (Peer reviewed; Journal article, 2019)
      Questions: Vegetation in the forest–tundra ecotone faces changes in both climate and land‐use. While climate warming is an important driver of vegetation growth and composition, herbivory may have opposing effects. In ...

    • Growth variable-specific moisture and temperature limitations in co-occuring alpine tree and shrub species, central Himalayas, Nepal 

      Rayback, S.A.; Shrestha, K.B.; Hofgaard, Annika (Journal article; Peer reviewed, 2017)
      Trees and shrubs found in the forest-tundra ecotone (FTE) are considered to be highly sensitive to climate change, but their response to climatic drivers is only partially understood. We use dendrochronological techniques ...

    • The Historical Complexity of Tree Height Growth Dynamic Associated with Climate Change in Western North America 

      Messaoud, Yassine; Reid, Anya M.; Tchebakova, Nadezhda M.; Goldman, Jack A.; Hofgaard, Annika (Peer reviewed; Journal article, 2022)
      The effect of climate on tree growth has received increased interest in the context of climate change. However, most studies have been limited geographically and with respect to species. Here, sixteen tree species of western ...

    • Is subarctic forest advance able to keep pace with climate change? 

      Rees, W.Gareth; Hofgaard, Annika; Boudreau, Stephanie; Cairns, David; Harper, Karen; Mamet, Steven; Mathisen, Ingrid; Swirad, Zuzanna; Tutubalina, Olga (Journal article, 2020)
      Recent climate warming and scenarios for further warming have led to expectations of rapid movement of ecological boundaries. Here we focus on the circumarctic forest–tundra ecotone (FTE), which represents an important ...

    • The missing pieces for better future predictions in subarctic ecosystems: A Tornetra¨sk case study 

      Pascual, Didac; Åkerman, Jonas; Becher, Marina; Callaghan, Terry V.; Christensen, Torben R.; Dorrepaal, Ellen; Emanuelsson, Urban; Giesler, Reiner; Hammarlund, Dan; Hanna, Edward; Hofgaard, Annika; Jin, Hongxiao; Johansson, Cecilia; Jonasson, Christer; Klaminder, Jonatan; Karlsson, Jan; Lundin, Erik; Michelsen, Anders; Olefeldt, David; Persson, Andreas; Phoenix, Gareth K.; Ra˛czkowska, Zofia; Rinnan, Riikka; Ström, Lena; Tang, Jing; Varner, Ruth K.; Wookey, Philip; Johansson, Margareta (Peer reviewed; Journal article, 2020)
      Arctic and subarctic ecosystems are experiencing substantial changes in hydrology, vegetation, permafrost conditions, and carbon cycling, in response to climatic change and other anthropogenic drivers, and these changes ...

    • Monitoring climate sensitivity shifts in tree-rings of Eastern Boreal North America using model-data comparison. Shifts in tree growth sensivity to climate 

      Ols, Clementine; Girardin, Martin P.; Hofgaard, Annika; Bergeron, Yves; Drobyshev, Igor (Journal article; Peer reviewed, 2017)
      The growth of high-latitude temperature-limited boreal forest ecosystems is projected to become more constrained by soil water availability with continued warming. The purpose of this study was to document ongoing shifts ...

    • The Morphometric structure of the Larix Gmellinii recruitment at the northern limit of its range in the forest-tundra ecotone 

      Golubeva, Elena; Hofgaard, Annika; Silenchuk, Ksenia (Peer reviewed, 2013)
      The goal of the research presented herein is the investigation of the morphometric and age parameters of the recruitment of forest stands formed by Larix gmellinii, as an indicator of trends in the dynamics of the ...

    • Myrrestaurering 2015. Etablering av overvåkingsmetodikk for vegetasjon og grunnlagsanalyse før restaureringstiltak på Kaldvassmyra, Aurstadmåsan og Midtfjellmosen 

      Hagen, Dagmar; Aarrestad, Per Arild; Kyrkjeeide, Magni Olsen; Foldvik, Anders; Myklebost, Heidi E.; Hofgaard, Annika; Kvaløy, Pål; Hamre, Øyvind (NINA rapport;1212, Research report, 2015-11-30)
      Hagen, D., Aarrestad, P.A., Kyrkjeeide, M.O., Foldvik, A., Myklebost, H.E., Hofgaard, A., Kvaløy, P. & Hamre, Ø. 2015. Myrrestaurering 2015. Etablering av overvåkingsmetodikk for vegetasjon og grunnlagsanalyse før ...