Browsing Brage NMBU by Author "Bollandsås, Ole Martin"
Now showing items 21-40 of 41
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Krekling (Empetrum nigrum) sin påverknad på mortalitet og rekruttering på tre i tregrenseøkotonen
Hilstad, Inger Elisabeth (Master thesis, 2019)Klimaet er i endring, noko som vil påverka veksten, samansetninga og utbreiinga til vegetasjonen. Mange studiar har synt at det er i tregrenseøkotonen slike endringar vil vera tydelegast. Ulike studiar syner at krekling ... -
Land cover classification of treeline ecotones along a 1100 km latitudinal transect using spectral- and three-dimensional information from UAV-based aerial imagery
Mienna, Ida Marielle; Klanderud, Kari; Ørka, Hans Ole; Bryn, Anders; Bollandsås, Ole Martin (Peer reviewed; Journal article, 2022)The alpine treeline ecotone is expected to move upwards in elevation with global warming. Thus, mapping treeline ecotones is crucial in monitoring potential changes. Previous remote sensing studies have focused on the usage ... -
Large-area forest productivity estimation using bitemporal data from airborne laser scanning and digital aerial photogrammetry
Noordermeer, Lennart (PhD Thesis;2020:37, Doctoral thesis, 2020)Site index (SI) indicates the magnitude of timber production that can be realized at a given site and is a crucial variable in forest planning. In Norwegian forest management inventories, SI is commonly quanti ed with large ... -
Legacy effects of herbivory on treeline dynamics along an elevational gradient
Mienna, Ida Marielle; Austrheim, Gunnar; Klanderud, Kari; Bollandsås, Ole Martin; Speed, James David Mervyn (Peer reviewed; Journal article, 2022) -
Mapping and Estimating Aboveground Biomass in an Alpine Treeline Ecotone under Model-Based Inference
Mukhopadhyay, Ritwika; Næsset, Erik; Gobakken, Terje; Mienna, Ida Marielle; Candelas Bielza, Jaime; Austrheim, Gunnar; Persson, Henrik Jan; Ørka, Hans Ole; Roald, Bjørn-Eirik; Bollandsås, Ole Martin (Peer reviewed; Journal article, 2023) -
Mapping and estimating the total living biomass and carbon in low-biomass woodlands using Landsat 8 CDR data
Gizachew, Belachew; Solberg, Svein; Næsset, Erik; Gobakken, Terje; Bollandsås, Ole Martin; Breidenbach, Johannes; Zahabu, Eliakimu; Mauya, Ernest William (Journal article; Peer reviewed, 2016) -
Model-assisted estimation of change in forest biomass over an 11 year period in a sample survey supported by airborne LiDAR: A case study with post-stratification to provide "activity data"
Næsset, Erik; Bollandsås, Ole Martin; Gobakken, Terje; Gregoire, Timothy; Ståhl, Göran (Journal article; Peer reviewed, 2013) -
Modeling aboveground biomass in dense tropical submontane rainforest using airborne laser scanner data
Hansen, Endre Hofstad; Gobakken, Terje; Bollandsås, Ole Martin; Zahabu, Eliakimu; Næsset, Erik (Journal article; Peer reviewed, 2015) -
Modelling aboveground forest biomass using airborne laser scanner data in the miombo woodlands of Tanzania
Mauya, Ernest William; Ene, Liviu Theodor; Bollandsås, Ole Martin; Gobakken, Terje; Næsset, Erik; Malimbwi, Rogers Ernerst; Zahabu, Eliakimu (Journal article; Peer reviewed, 2015) -
Monitoring forest carbon in a Tanzanian woodland using interferometric SAR: a novel methodology for REDD+
Solberg, Svein; Gizachew, Belachew; Næsset, Erik; Gobakken, Terje; Bollandsås, Ole Martin; Mauya, Ernest William; Olsson, Håkan; Malimbwi, Rogers; Zahabu, Eliakimu (Journal article; Peer reviewed, 2015) -
Nøyaktighet og presisjon ved høydemålinger på enkeltrær
Hansen, Elisabeth Annie Anderheim (Master thesis, 2021)For å kunne ta rasjonelle beslutninger knyttet til forvaltning av skog er det viktig at det finnes oppdatert og pålitelig informasjon om skogressursene. Ved hjelp av takseringer kan en hente ut informasjon om skogressursene, ... -
On the accuracy of GNSS in forests : a test of consumer-grade GNSS equipment, smartphones and open-source postprocessing software under forest canopies, for mapping of forest species
Konnestad, Anders Johan (Master thesis, 2018)The forests are home of two thirds of the red listed species in Norway. To safeguard these species when doing forest management, it is important to know where their respective biotopes are. When mapping species the Global ... -
Predicting living and dead wood volumes in a mature managed Swedish forest with airborne laser scanning
Swärd, Hans Yngve Ivar (Master thesis, 2022)Detecting dead wood with airborne laser scanning (ALS) would have many benefits. It would make it easier to find areas with high mortality rates, help make better decisions on which areas to preserve, and increase the ... -
Resilience of Alpine Salix shrubs to changes in browsing pressure
Palm, Marlene (Master thesis, 2020)Browsing by large herbivores has the potential to inhibit climate-driven shrub expansion. How resilient shrubs are to a change in herbivory, however, is not fully understood. In this study, I want to examine how Salix ... -
Ressursoversikt og virkeproduksjon på Norges miljø- og biovitenskapelige universitets skogeiendom
Veidahl, Arild; Bollandsås, Ole Martin; Gobakken, Terje; Økseter, Roar (MINA fagrapport;46, Report, 2017)Universitetsskogen har eksistert som forvaltningsenhet siden 1859 og er et resultat av langsiktig innsats i skogskjøtsel. Produktivt skogareal har på grunn av omdisponering og tilkjøp av areal økt fra 1061 dekar i 1938 til ... -
The role of biotic and abiotic factors on treeline ecotone dynamics : studies using field observations and remote sensing
Mienna, Ida Marielle (PhD Thesis;2022:35, Doctoral thesis, 2022)With global warming, the forest extent is expected to change, and the transition zone between the upper forest boundary and treeless alpine landscape (i.e., the treeline ecotone) is expected to migrate to higher elevations. ... -
Soil carbon stocks in different vegetation classes across the treeline ecotone in central- and southern Norway
Aasgård, Olav With (Master thesis, 2022)The expansion of the treeline into the currently treeless alpine tundra may have considerable impacts on carbon storage. Recent studies have shown that the expansion of trees into the alpine tundra could lead to an increase ... -
Soil carbon storage in the forest-tundra ecotone : insights from field- and remotely sensed data
Devos, Claire Céline (PhD Thesis;2023:84, Doctoral thesis, 2023)Due to climate warming, forests are moving to higher elevations and latitudes at the expense of treeless tundra. Recent studies suggest that these vegetation shifts promote soil organic carbon (SOC) losses that exceed ... -
Taksering av ungskog med flybåren laserskanning
Noordermeer, Lennart (Master thesis, 2017)Gode data om egenskaper til ungskog er avgjørende for å kunne ta riktige beslutninger knyttet til skogskjøtsel, men fremskaffing av nøyaktige prediksjoner av disse egenskapene ut fra flybåren laser skanning (FLS) data er ... -
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)