Blar i forfatter "Moriana Armendariz, Mikel"

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    • Global maps of soil temperature 

      Lembrechts, Jonas J.; van den Hoogen, Johan; Aalto, Juha; Ashcroft, Michael B.; De Frenne, Pieter; Kemppinen, Julia; Kopecký, Martin; Luoto, Miska; Maclean, Ilya M. D.; Crowther, Thomas W.; Bailey, Joseph J.; Haesen, Stef; Klinges, David H.; Niittynen, Pekka; Scheffers, Brett R.; Van Meerbeek, Koenraad; Aartsma, Peter; Abdalaze, Otar; Abedi, Mehdi; Aerts, Rien; Ahmadian, Negar; Ahrends, Antje; Alatalo, Juha M.; Alexander, Jake M.; Altman, Jan; Allonsius, Camille Nina; Ammann, Christof; Andres, Christian; Andrews, Christopher; Ardö, Jonas; Arriga, Nicola; Arzac, Alberto; Aschero, Valeria; Leandro de Assis, Rafael; Bjerke, Jarle W.; Cooper, Elisabeth J.; Graae, Bente Jessen; Rechsteiner, Aud Helen Halbritter; Haugum, Siri Vatsø; Lang, Simone; Lynn, Joshua Scott; Moriana Armendariz, Mikel; Petit Bon, Matteo; Smith, Stuart; Sørensen, Mia Vedel; Speed, James David Mervyn; Vandvik, Vigdis; Wedegärtner, Ronja Elisabeth Magdalene; Nijs, Ivan; Lenoir, Jonathan (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-12-29)
      Research in global change ecology relies heavily on global climatic grids derived from estimates of air temperature in open areas at around 2 m above the ground. These climatic grids do not reflect conditions below vegetation canopies and near the ground surface, where critical ecosystem functions occur and most terrestrial species reside. Here, we provide global maps of soil temperature and bioclimatic ...

    • High resistance to climatic variability in a dominant tundra shrub species 

      Gonzalez, Victoria; Moriana Armendariz, Mikel; Hagen, Snorre; Lindgård, Bente; Reiersen, Rigmor; Bråthen, Kari Anne (Journal article; Tidsskriftartikkel; Peer reviewed, 2019-06-05)
      Climate change is modifying temperature and precipitation regimes across all seasons in northern ecosystems. Summer temperatures are higher, growing seasons extend into spring and fall and snow cover conditions are more variable during winter. The resistance of dominant tundra species to these season-specific changes, with each season potentially having contrasting effects on their growth and survival, ...

    • Increased snow and cold season temperatures alter High Arctic parasitic fungi – host plant interactions 

      Moriana Armendariz, Mikel; Abbandonato, Holly; Yamaguchi, Takahiro; Mörsdorf, Martin Alfons; Aares, Karoline; Semenchuk, Philipp; Tojo, Motoaki; Cooper, Elisabeth (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-05-07)
      In the Arctic, fungal mycelial growth takes place mainly during the cold season and beginning of growing season. Climate change induced increases of cold season temperatures may, hence, benefit fungal growth and increase their abundance. This is of particular importance for parasitic fungi, which may significantly shape Arctic vegetation composition. Here, we studied two contrasting plant parasitic ...

    • Natural variation in snow depth and snow melt timing in the High Arctic have implications for soil and plant nutrient status and vegetation composition 

      Moriana Armendariz, Mikel; Nilsen, Lennart; Cooper, Elisabeth J. (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-02-16)
      Snow cover is a key component in Arctic ecosystems and will likely be affected by changes in winter precipitation. Increased snow depth and consequent later snowmelt leads to greater microbial mineralization in winter, improving soil and vegetation nutrient status. We studied areas with naturally differing snow depths and date of snowmelt in Adventdalen, Svalbard. Soil properties, plant leaf ...

    • Yearly variation in allelopathic compound production along a climatic gradient. A case of study of Empetrum nigrum 

      Moriana Armendariz, Mikel (Master thesis; Mastergradsoppgave, 2017-11-15)
      Empetrum nigrum is a plant common in northern ecosystems with capacity to produce allelopathic compounds, which among other effects inhibit seed establishment and germination of other plants. Some of the most studied compounds regarding this effect are batatasin-III and phenolic acids, among them caffeic acid, which account for a large proportion of the leaf’s biomass. 5 random sites were established ...