Now showing items 41-60 of 74

    • Modelling Capercaillie (Tetrao urogallus) lek sites distribution and their limiting factors in a central Norwegian managed forest landscape 

      Thingstad, Per Gustav; Daverdin, Marc; Speed, James David Mervyn (Journal article; Peer reviewed, 2018)
      Forest management has substantially altered Fennoscandian forests through clear-cutting practices started during the 1950s. Impacts on the natural biodiversity in mature boreal forest have been inevitable. The Capercaillie ...
    • Moose effects on soil temperatures, tree canopies, and understory vegetation: a path analysis 

      Kolstad, Anders Lorentzen; Austrheim, Gunnar; Graae, Bente Jessen; Solberg, Erling Johan; Strimbeck, Richard; Speed, James David Mervyn (Journal article; Peer reviewed, 2018)
      Large vertebrate herbivores are ubiquitous and increasingly numerous in boreal forests where they are known to influence ecosystems in many ways. However, separating the direct effects of herbivores from their indirect ...
    • Natural and cultural heritage in mountain landscapes: towards an integrated valuation 

      Speed, James David Mervyn; Austrheim, Gunnar; Birks, Harry John Betteley; Johnson, Sally; Kvamme, Mons; Nagy, Laszlo; Sjøgren, Per Johan E; Skar, Birgitte; Stone, Duncan; Svensson, Eva; Thompson, Des B.A. (Journal article; Peer reviewed, 2012)
      Mountain areas of Europe have been managed by humans for a long time, leading to a prevalence of semi-natural habitats in mountain landscapes today. These landscapes contain both natural and cultural heritage; however, ...
    • Net Climate Effects of Moose Browsing in Early Successional Boreal Forests by Integrating Carbon and Albedo Dynamics 

      Salisbury, John; Hu, Xiangping; Speed, James David Mervyn; Iordan, Cristina Maria; Austrheim, Gunnar; Cherubini, Francesco (Peer reviewed; Journal article, 2023)
      Moose (Alces alces) is a large herbivore that can mediate boreal forest regeneration after timber harvest through selective browsing of tree species. Despite increasing evidence of moose browsing influence on tree growth ...
    • Pervasive moose browsing in boreal forests alters successional trajectories by severely suppressing keystone species 

      Kolstad, Anders Lorentzen; Austrheim, Gunnar; Solberg, Erling Johan; De Vriendt, Laurent; Speed, James David Mervyn (Journal article; Peer reviewed, 2018)
      Large herbivores can shape young forest stands and determine the successional trajectory of forested ecosystems by selectively browsing palatable species at the sapling stage. Moose (Alces alces) is the dominant vertebrate ...
    • Plant functional trait change across a warming tundra biome 

      Bjorkman, Anne D.; Myers-Smith, Isla H.; Elmendorf, Sarah C.; Normand, Signe; Rüger, Nadja; Beck, Pieter S. A.; Blach-Overgaard, Anne; Blok, Daan; Cornelissen, J. Hans C.; Forbes, Bruce C.; Georges, Damien; Goetz, Scott J.; Guay, Kevin C.; Henry, Gregory H.R.; HilleRisLambers, Janneke; Hollister, Robert D.; Karger, Dirk N.; Kattge, Jens; Manning, Peter; Prevéy, Janet S.; Rixen, Christian; Schaepman-Strub, Gabriela; Thomas, Haydn J.D.; Vellend, Mark; Wilmking, Martin; Wipf, Sonja; Carbognani, Michele; Hermanutz, Luise; Lévesque, Esther; Molau, Ulf; Petraglia, Alessandro; Soudzilovskaia, Nadejda A.; Spasojevic, Marko J.; Tomaselli, Marcello; Vowles, Tage; Alatalo, Juha M.; Alexander, Heather D.; Anadon-Rosell, Alba; Angers-Blondin, Sandra; te Beest, Mariska; Berner, Logan; Björk, Robert G.; Buchwal, Agata; Buras, Allan; Christie, Katherine; Cooper, Elisabeth J.; Dullinger, Stefan; Elberling, Bo; Eskelinen, Anu; Frei, Esther R.; Grau, Oriol; Grogan, Paul; Hallinger, Martin; Semenschuk, Philipp; Speed, James David Mervyn; Hofgaard, Annika (Journal article; Peer reviewed, 2018)
      The tundra is warming more rapidly than any other biome on Earth, and the potential ramifications are far-reaching because of global feedback effects between vegetation and climate. A better understanding of how environmental ...
    • Proximity to high densities of pastoral settlements reduces grassland regrowth in a protected tropical savanna 

      Wana, Desalegn; Smith, Stuart; Coleman, Kjirsten Elizabeth Robyne; Speed, James David Mervyn (Journal article; Peer reviewed, 2021)
      Sedentarization of pastoralist communities is reshaping the structure and functioning of tropical savannas. Of particular concern is how permanent pastoral settlements change grassland vegetation inside “protected” areas. ...
    • A regionally coherent ecological fingerprint of climate change, evidenced from natural history collections 

      Speed, James David Mervyn; Evankow, Ann; Petersen, Tanja Kofod; Ranke, Peter Sjolte; Nilsen, Nellie Henriette; Turner, Grace Winifred; Aagaard, Kaare; Bakken, Torkild; Davidsen, Jan Grimsrud; Dunshea, Glenn; Hassel, Kristian; Finstad, Anders Gravbrøt; Husby, Magne; Hårsaker, Karstein; Koksvik, Jan Ivar; Prestø, Tommy; Vange, Vibekke (Peer reviewed; Journal article, 2022)
      Climate change has dramatic impacts on ecological systems, affecting a range of ecological factors including phenology, species abundance, diversity, and distribution. The breadth of climate change impacts on ecological ...
    • The relative role of climate and herbivory in driving treeline dynamics along a latitudinal gradient 

      Mienna, Ida Marielle; Speed, James David Mervyn; Klanderud, Kari; Austrheim, Gunnar; Næsset, Erik; Bollandsås, Ole Martin (Peer reviewed; Journal article, 2020)
      Aim The treeline is an obvious ecotone between forest and tundra ecosystems. Climatic warming is expected to lead to the treeline advancing, although in many cases this has not been observed. This is most likely because ...
    • A Review of Ungulate Impacts on the Success of Climate-Adapted Forest Management Strategies 

      Champagne, Emilie; Raymond, Patricia; Royo, Alejandro; Speed, James David Mervyn; Tremblay, Jean-Pierre; Côte, Steeve D (Peer reviewed; Journal article, 2021)
      Purpose of Review Climate change is modifying the dynamics of forests and threatens the supply of ecosystem services from managed forests. In response, managers are developing climate-adapted strategies, mostly focusing ...
    • Rogn, osp og selje-Har de en framtid i norsk natur? 

      Solberg, Erling Johan; Myking, Tor; Austrheim, Gunnar; Bøhler, Fredrik; Eriksen, Rune; Speed, James David Mervyn; Astrup, Rasmus Andreas (NINA rapport;806, Research report, 2012)
      Rogn, osp og selje finnes i alle deler av landet, men med varierende tettheter. Ospa er mest vanlig i kystnære områder i sørøst-Norge, mens rogn og selje er mere jevnt fordelt over hele landet. Artene er særmerket av kort ...
    • Savannah trees buffer herbaceous plant biomass against wild and domestic herbivores 

      Smith, Stuart; Graae, Bente Jessen; Bukombe, John; Hassan, Shombe N.; Lyamuya, Richard Daniel; Mtweve, Philipo Jacob; Treydte, Anna C; Speed, James David Mervyn (Journal article; Peer reviewed, 2019)
      Questions Given the growing abundance and dominance of domestic herbivores in savannah ecosystems, can trees maintain plant herbaceous standing biomass under increasing herbivore pressure? Are there differences in the ...
    • SoilTemp: A global database of near-surface temperature 

      Lembrechts, Jonas J.; Smith, Stuart; Halbritter, Aud Helen; Graae, Bente Jessen; Sørensen, Mia Vedel; Speed, James David Mervyn; Wedegärtner, Ronja Elisabeth Magdalene (Peer reviewed; Journal article, 2020)
      Current analyses and predictions of spatially explicit patterns and processes in ecology most often rely on climate data interpolated from standardized weather stations. This interpolated climate data represents long-term ...
    • Spatial patterns of phylogenetic and species diversity of fennoscandian vascular plants in protected areas 

      Matten, Damaris Marina; Mienna, Ida Marielle; Bieker, Vanessa Carina; Mishler, Brent D; Moen, Victoria Stornes; Nygård, Malene Østreng; Vuorinen, Katariina Elsa M; Bendiksby, Mika; Martin, Michael David; Speed, James David Mervyn (Peer reviewed; Journal article, 2023)
      Protected areas are one of the main strategic means for conserving biodiversity. Yet, the design of protected areas usually neglects phylogenetic diversity, an important diversity measure. In this paper we assess the ...
    • Spatiotemporal monitoring of the rare northern dragonhead (Dracocephalum ruyschiana, Lamiaceae) — SNP genotyping and environmental niche modeling herbarium specimens 

      Nygaard, Malene; Kopatz, Alexander; Speed, James David Mervyn; Martin, Michael David; Prestø, Tommy; Kleven, Oddmund; Bendiksby, Mika (Journal article; Peer reviewed, 2022)
      The species we have studied the spatiotemporal genetic change in the northern dragonhead, a plant species that has experienced a drastic population decline and habitat loss in Europe. We have added a temporal perspective ...
    • Species data for understanding biodiversity dynamics: The what, where and when of species occurrence data collection 

      Petersen, Tanja Kofod; Speed, James David Mervyn; Grøtan, Vidar; Austrheim, Gunnar (Peer reviewed; Journal article, 2021)
      1. The availability and quantity of observational species occurrence records have greatly increased due to technological advancements and the rise of online portals, such as the Global Biodiversity Information Facility ...
    • 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 (Peer reviewed; Journal article, 2020)
      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 ...
    • Tardigrade diversity and community composition across Norwegian boreal forests 

      Guidetti, Roberto; Jönsson, K. Ingemar; Kaczmarek, Łukasz; Meier, Terje; Speed, James David Mervyn; Prestø, Tommy; Stur, Elisabeth; Topstad, Lasse; Cesari, Michele; Roszkowska, Milena; Zawierucha, Krzysztof; Hassel, Kristian; Ekrem, Torbjørn (Peer reviewed; Journal article, 2023)
      Tardigrades are common in many terrestrial environments and habitats. Although little is known on their ecological preferences, previous studies found diversity and community composition significantly affected by various ...
    • Teatime in the Serengeti: macrodetritivores sustain recalcitrant plant litter decomposition across human-modified tropical savannahs 

      Sundsdal, Anders; Graae, Bente Jessen; Speed, James David Mervyn; Bukombe, John; Mtweve, Philipo Jacob; Arneberg, Marit K.; Haukenes, Vilde; Grevskott, Ragnhild TH.; Smith, Stuart (Peer reviewed; Journal article, 2020)
      Background and aims Intensification of savannah land-use is predicted to negatively influence soil biodiversity and functioning such as litter decomposition by detritivores. Loss of macrodetritivores, particularly termites, ...
    • Testing enemy release of non-native plants across time and space using herbarium specimens in Norway 

      Ivison, Katy; Speed, James David Mervyn; Prestø, Tommy; Dawson, Wayne (Peer reviewed; Journal article, 2022)
      The enemy release hypothesis predicts that invasive plant success is in part due to the absence of natural enemies in the invaded range. However, few studies have assessed how enemy release may vary over time or space. ...