Browsing NTNU Open by Author "Albertsen, Elena"
Now showing items 1-9 of 9
-
Are flowering plants in abandoned semi-natural grasslands pollen limited; an experiment with Campanula rotundifolia
Bolme, Simon (Master thesis, 2023)Populasjoner av pollinatorer forsvinner, og vi trenger nye mater å hindre dem i å forsvinne. En måte å gjøre dette på kan være å restaurere landskap med plantepopulasjoner som opplever pollen-begrensning. Dette skjer når ... -
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 ... -
Impacts of roads on bird species richness: A meta-analysis considering road types, habitats and feeding guilds
Kroeger, Svenja; Hanslin, Hans Martin; Lennartsson, Tommy; D'Amico, Marcello; Kollmann, Johannes; Fischer, Christina; Albertsen, Elena; Speed, James David Mervyn (Peer reviewed; Journal article, 2021)Roadsides can harbour remarkable biodiversity; thus, they are increasingly considered as habitats with potential for conservation value. To improve construction and management of roadside habitats with positive effects on ... -
Ivaretagelse av ville pollinatorer og planter tilknyttet kulturlandskapet i byutviklingen. Oppsummering av forskningsprosjektet BE(E) DIVERSE
Johansen, Line; Albertsen, Elena; Bär, Annette; Hanslin, Hans Martin; Herfindal, Ivar; van der Veen, Bert; Henriksen, Marie Vestergaard; Vinge, Heidi; Wehn, Sølvi; Solbu, Erik (NIBIO Rapport, Research report, 2023)Det er en global nedgang av ville pollinatorer, og hovedårsaken til dette er at leveområdene deres er under press og går tapt på grunn av urbanisering og andre arealendringer. I BE(E) DIVERSE prosjektet har vi derfor studert ... -
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, ... -
Quantitative assessment of observed versus predicted responses to selection
Pelabon, Christophe; Albertsen, Elena; Le Rouzic, Arnaud; Firmat, Cyril; Bolstad, Geir Hysing; Armbruster, W. Scott; Hansen, Thomas Fredrik (Peer reviewed; Journal article, 2021)Although artificial-selection experiments seem well suited to testing our ability to predict evolution, the correspondence between predicted and observed responses is often ambiguous due to the lack of uncertainty estimates. ... -
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 ...