Blar i forfatter Artikler, rapporter og annet (arktisk og marin biologi) "Utsi, Tove Aagnes"

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    • Forage quality in tundra grasslands under herbivory: Silicon-based defences, nutrients and their ratios in grasses 

      Petit Bon, Matteo; Inga, Katarina Gunnarsdotter; Utsi, Tove Aagnes; Jonsdottir, Ingibjørg; Bråthen, Kari Anne (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-10-08)
      1. Herbivore-induced changes in both leaf silicon-based defence and nutrient levels are potential mechanisms through which grazers alter the quality of their own grass supply. In tundra grasslands, herbivores have been shown to increase nutrient contents of grasses; yet, it is an open question whether they also increase grass silicon-based defence levels. Here, we asked if, and to what extent, ...

    • Human-animal agency in reindeer management: Sami herders perspectives on vegetation dynamics under climate change 

      Horstkotte, Tim; Utsi, Tove Aagnes; Larsson-Blind, Åsa; Burgess, Peter; Johansen, Bernt; Kayhko, Jukka; Oksanen, Lauri Kalervo; Forbes, B.C. (Journal article; Tidsskriftartikkel; Peer reviewed, 2017-09-13)
      Many primary livelihoods in Arctic and sub-Arctic regions experience accelerating effects of environmental change. The often close connection between indigenous peoples and their respective territories allows them to make detailed observations of how these changes transform the landscapes where they practice their daily activities. Here, we report Sámi reindeer herders’ observations based on their ...

    • The impact of thermal seasonality on terrestrial endotherm food web dynamics: a revision of the Exploitation Ecosystem Hypothesis 

      Oksanen, Tarja Maarit; Oksanen, Lauri; Vuorinen, Katariina; Wolf, Christopher; Mäkynen, Aurelia; Olofsson, Johan; Ripple, William J.; Virtanen, Risto; Utsi, Tove Aagnes (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-09-06)
      Many terrestrial endotherm food webs constitute three trophic level cascades. Others have two trophic level dynamics (food limited herbivores; plants adapted to tackle intense herbivory) or one trophic level dynamic (herbivorous endotherms absent, thus plants compete for the few places where they can survive and grow). According to the Exploitation Ecosystems Hypothesis (EEH), these contrasting ...

    • Interactions between winter and summer herbivory affect spatial and temporal plant nutrient dynamics in tundra grassland communities 

      Petit Bon, Matteo; Inga, Katarina Gunnarsdotter; Jónsdóttir, Ingibjörg Svala; Utsi, Tove Aagnes; Soininen, Eeva Marjatta; Bråthen, Kari Anne (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-04-27)
      In the long‐term, herbivores can alter nutrient dynamics in terrestrial ecosystems by changing the functional composition of plant communities. Here, we ask to what extent herbivores can affect plant‐community nutrient dynamics in the short‐term. We provide theoretical expectations for immediate effects of herbivores on tundra‐grassland plant‐community nutrient levels throughout a single growing ...

    • Novel frontier in wildlife monitoring: Identification of small rodent species from fecal pellets using near-infrared reflectance spectroscopy (NIRS) 

      Tuomi, Maria; Murguzur, Francisco Javier Ancin; Hoset, Katrine S.; Soininen, Eeva M; Vesterinen, Eero J.; Utsi, Tove Aagnes; Kaino, sissel; Bråthen, Kari Anne (Journal article; Tidsskriftartikkel; Peer reviewed, 2023-03-19)
      Small rodents are prevalent and functionally important across the world's biomes, making their monitoring salient for ecosystem management, conservation, forestry, and agriculture. There is a growing need for cost-effective and noninvasive methods for large-scale, intensive sampling. Fecal pellet counts readily provide relative abundance indices, and given suitable analytical methods, feces could ...