• Developing common protocols to measure tundra herbivory across spatial scales 

      Barrio, Isabel C.; Ehrich, Dorothee; Soininen, Eeva M; Ravolainen, Virve; Bueno, C. G.; Gilg, Olivier; Koltz, Amanda; Speed, James David Mervyn; Hik, David S.; Mörsdorf, M.; Alatalo, Juha M.; Angerbjørn, A.; Bêty, Joël; Bollache, L.; Boulanger-Lapointe, N.; Brown, G. S.; Eischeid, Isabell; Giroux, M. A.; Hajek, T.; Hansen, Brage Bremset; Hofhius, S. P.; Lamarre, J.-F.; Lang, J.; Latty, C.; Lecomte, N.; Macek, P.; McKinnon, L.; Myers-Smith, I. H.; Pedersen, Åshild Ønvik; Prevey, J. S.; Roth, J. D.; Saalfeld, S. T.; Schmidt, N. M.; Smith, P.; Sokolov, A.; Sokolova, N.; Stolz, C.; van Bemmelen, R.; Varpe, Øystein; Woodard, P. F.; Jonsdottir, I. S. (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-03-12)
      Understanding and predicting large-scale ecological responses to global environmental change requires comparative studies across geographic scales with coordinated efforts and standardized methodologies. We designed, applied, and assessed standardized protocols to measure tundra herbivory at three spatial scales: plot, site (habitat), and study area (landscape). The plot- and site-level protocols ...
    • Disturbance mapping in arctic tundra improved by a planning workflow for drone studies: Advancing tools for future ecosystem monitoring 

      Eischeid, Isabell; Soininen, Eeva M; Assmann, Jakob J.; Ims, Rolf Anker; Madsen, Jesper; Pedersen, Åshild Ø.; Pirotti, Francesco; Yoccoz, Nigel; Ravolainen, Virve T. (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-11-06)
      The Arctic is under great pressure due to climate change. Drones are increasingly used as a tool in ecology and may be especially valuable in rapidly changing and remote landscapes, as can be found in the Arctic. For effective applications of drones, decisions of both ecological and technical character are needed. Here, we provide our method planning workflow for generating ground-cover maps with ...
    • High Arctic ecosystem states: Conceptual models of vegetation change to guide long-term monitoring and research 

      Ravolainen, Virve; Soininen, Eeva Marjatta; Jónsdóttir, Ingibjörg Svala; Eischeid, Isabell; Forchhammer, Mads C.; van der Wal, René; Pedersen, Åshild Ønvik (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-01-18)
      Vegetation change has consequences for terrestrial ecosystem structure and functioning and may involve climate feedbacks. Hence, when monitoring ecosystem states and changes thereof, the vegetation is often a primary monitoring target. Here, we summarize current understanding of vegetation change in the High Arctic—the World’s most rapidly warming region—in the context of ecosystem monitoring. To ...
    • High seasonal overlap in habitat suitability in a nonmigratory High Arctic ungulate 

      Pedersen, Åshild Ønvik; Soininen, Eeva M; Hansen, Brage Bremset; Le Moullec, Mathilde; Loe, Leif Egil; Paulsen, I.M.G.; Eischeid, Isabell; Karlsen, Stein Rune; Ropstad, Erik; Stien, Audun; Tarroux, Arnaud; Tømmervik, Hans; Ravolainen, Virve (Journal article; Tidsskriftartikkel; Peer reviewed, 2023-05-26)
      Understanding drivers of space use and habitat selection is essential for management and conservation, especially under rapid environmental change. Here, we develop summer and winter habitat suitability models for the endemic wild Svalbard reindeer (Rangifer tarandus platyrhynchus). The High Arctic Svalbard tundra is currently subject to the fastest temperature increases on Earth, and reindeer ...
    • How Many Reindeer? UAV Surveys as an Alternative to Helicopter or Ground Surveys for Estimating Population Abundance in Open Landscapes 

      Paulsen, Ingrid M.; Pedersen, Åshild Ø; Hann, Richard; Blanchet, Marie-Anne; Eischeid, Isabell; van Hazendonk, Charlotte Maartje; Ravolainen, Virve; Stien, Audun; Le Moullec, Mathilde (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-12-20)
      Conservation of wildlife depends on precise and unbiased knowledge on the abundance and distribution of species. It is challenging to choose appropriate methods to obtain a sufficiently high detectability and spatial coverage matching the species characteristics and spatiotemporal use of the landscape. In remote regions, such as in the Arctic, monitoring efforts are often resource-intensive and there ...
    • Location of studies and evidence of effects of herbivory on Arctic vegetation: a systematic map 

      Soininen, Eeva M; Barrio, Isabel C.; Bjørkås, Ragnhild; Björnsdóttir, Katrin; Ehrich, Dorothee; Hopping, Kelly A.; Kaarlejarvi, E.; Kolstad, Anders Lorentzen; Abdulmanova, Svetlana; Björk, Robert G.; Bueno, C. Guillermo; Eischeid, Isabell; Higgens, Rebecca Finger; Forbey, Jennifer; Gignac, Charles; Gilg, Olivier; Herder, Michael den; Holm, H. S.; Hwang, Bernice; Jepsen, Jane Uhd; Kamenova, Stefaniya; Kater, Ilona; Koltz, Amanda; Kristensen, Jeppe A.; Little, Chelsea J.; Macek, Petr; Mathisen, Karen Marie; Metcalfe, Daniel B.; Mosbacher, Jesper Bruun; Mörsdorf, M.; Park, Taejin; Propster, Jeffrey; Roberts, Aradhana J; Serrano, E; Spiegel, Marcus P.; Tamayo, Mariana; Tuomi, Maria Wilhelmina; Verma, Megha; Vuorinen, Katariina Elsa Maria; Väisänen, Maria; Wal, Rene van der; Wilcots, Megan; Yoccoz, Nigel; Speed, James David Mervyn (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-10-14)
      Herbivores modify the structure and function of tundra ecosystems. Understanding their impacts is necessary to assess the responses of these ecosystems to ongoing environmental changes. However, the effects of herbivores on plants and ecosystem structure and function vary across the Arctic. Strong spatial variation in herbivore effects implies that the results of individual studies on herbivory ...
    • Machine learning for classification of an eroding scarp surface using terrestrial photogrammetry with nir and rgb imagery 

      Bernsteiner, H.; Brozova, N.; Eischeid, Isabell; Hamer, A.; Haselberger, S.; Huber, M.; Kollert, A.; Vandyk, T. M.; Pirotti, F. (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-08-03)
      Increasingly advanced and affordable close-range sensing techniques are employed by an ever-broadening range of users, with varying competence and experience. In this context a method was tested that uses photogrammetry and classification by machine learning to divide a point cloud into different surface type classes. The study site is a peat scarp 20 metres long in the actively eroding river bank ...
    • Snowmelt progression drives habitat selection and vegetation disturbance by an Arctic avian herbivore 

      Eischeid, Isabell; Madsen, Jesper; Ims, Rolf Anker; Nolet, Bart A.; Pedersen, Åshild Ønvik; Schreven, Kees H.T.; Soininen, Eeva Marjatta; Yoccoz, Nigel Gilles; Ravolainen, Virve (Journal article; Tidsskriftartikkel; Peer reviewed, 2023-12-17)
      Arctic tundra vegetation is affected by rapid climatic change and fluctuating herbivore population sizes. Broad-billed geese, after their arrival in spring, feed intensively on belowground rhizomes, thereby disturbing soil, mosses, and vascular plant vegetation. Understanding of how springtime snowmelt patterns drive goose behavior is thus key to better predict the state of Arctic tundra ecosystems. ...
    • Stomping in silence: Conceptualizing trampling effects on soils in polar tundra 

      Tuomi, Maria; Väisänen, Maria; Ylänne, H; Brearley, Francis Q.; Barrio, Isabel C.; Bråthen, Kari Anne; Eischeid, Isabell; Forbes, Bruce C.; Jónsdóttir, Ingibjörg; Kolstad, Anders Lorentzen; Macek, Petr; Petit Bon, Matteo; Speed, James David Mervyn; Stark, Sari; Svavarsdóttir, Kristin; Thorsson, Johann; Bueno, C. Guillermo (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-11-24)
      <ol> <li>Ungulate trampling modifies soils and interlinked ecosystem functions across biomes. Until today, most research has focused on temperate ecosystems and mineral soils while trampling effects on cold and organic matter‐rich tundra soils remain largely unknown.</li><p> <p><li>We aimed to develop a general model of trampling effects on soil structure, biota, microclimate and biogeochemical ...
    • Tundra vegetation ecology from the sky - Aerial images and photogrammetry as tools to monitor landscape change 

      Eischeid, Isabell (Doctoral thesis; Doktorgradsavhandling, 2022-05-24)
      Long-term temperature increases, higher frequencies of extreme weather events and changes in food web structures will all affect the state of Arctic tundra ecosystems at different temporal and spatial scales. Ecologists are tasked with understanding these biotic and abiotic interactions and finding methods to measure them. This thesis applies new technology and methods within the principles of ...