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Browsing NTNU Open by Author "Albertsen, Elena"

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    • Does seed size respond to selection on blossom size? - An artificial selection experiment on Dalechampia scandens 

      Ekrem, Runa Kvamme (Master thesis, 2017)
      1. Within populations variation in seed size may result from phenotypic correlation between seed size and flower size, a hypothesis originally suggested by Primack (1987). Such phenotypic correlation can be generated either ...
    • Evolution of floral traits: from ecological contex to functional integration 

      Albertsen, Elena (Doctoral theses at NTNU;2019:65, Doctoral thesis, 2019)
      Whether macroevolution, that is, evolution above the population level, can be explained by micro-evolutionary processes happening at the population level remains debated. In this thesis, we tested two hypotheses concerning ...
    • No evidence that seed predators constrain pollinator-mediated trait evolution in a tropical vine 

      Opedal, Øystein Hjorthol; Albertsen, Elena; Perez-Barrales, Rocio; Armbruster, W.Scott; Pelabon, Christophe (Journal article; Peer reviewed, 2019)
      Turnover in biotic communities across heterogeneous landscapes is expected to lead to variation in interactions among plants, their mutualists, and their antagonists. Across a fragmented landscape in northern Costa Rica, ...
    • Tree recruitment in the Forest-tundra Ecotone: Limitation and facilitation processes in contrasting climatic Regions 

      Albertsen, Elena (Master thesis, 2012)
      Aim: The aim of this study was to analyse how abiotic and biotic constraint and facilitation agents determine tree recruitment in the alpine zone in climatically different regions as well as across species; Birch, pine and ...
    • Using ecological context to interpret spatiotemporal variation in natural selection 

      Albertsen, Elena; Opedal, Øystein Hjorthol; Bolstad, Geir Hysing; Pérez-Barrales, Rocío; Hansen, Thomas F; Pelabon, Christophe; Armbruster, William Scott (Peer reviewed; Journal article, 2020)
      Spatiotemporal variation in natural selection is expected, but difficult to estimate. Pollinator‐mediated selection on floral traits provides a good system for understanding and linking variation in selection to differences ...

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