Browsing NTNU Open by Author "Strimbeck, Richard"
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Carbon Fluxes in Mosses in Alpine Ecosystems
Liasjø, Arnt Ove Storøy (Master thesis, 2016)Background and aims Alpines areas expected to see an increase in temperature as a response to climate change and bryophytes are decreasing in coverage compared to vascular plants. Thus it is of interest to see if the ... -
Change in vegetation composition and growth in the forest-tundra ecotone – effects of climate warming and herbivory
Løkken, Jørn Olav (Doctoral theses at NTNU;2020:321, Doctoral thesis, 2020)Overgangen mellom tett skog og fjellområder, skog-tundra-økotonen, er globalt sett i stor grad regulert av temperatur. Økt temperatur som følge av klimaendringer forventes å påvirke økotonen, med høydeforflytning av ... -
Dendroclimatology in southern Norway: tree rings, demography and climate
Svarva, Helene Løvstrand (Doctoral theses at NTNU;2019:195, Doctoral thesis, 2019)Tree rings provide annually resolved palaeoclimate archives. In southern Norway, time series of tree-ring width and maximum latewood density of Scots pine growing at certain high-elevation locations are correlated to ... -
Disintegration of the leaf economic spectrum within and across Quaking aspen (Populus tremuloides) genotypes
Rieksta, Jolanta (Master thesis, 2018) -
Drivers of C cycling in three arctic-alpine plant communities
Sørensen, Mia Vedel; Graae, Bente Jessen; Strimbeck, Richard; Enquist, Brian J. (Journal article; Peer reviewed, 2019)Recent vegetation changes in arctic-alpine tundra ecosystems may affect several ecosystem processes that regulate microbe and soil functions. Such changes can alter ecosystem carbon (C) cycling with positive feedback to ... -
Effects of Lichens on Seed Germination and Seedling Emergence of Vascular Plants on Dovre
Sundsdal, Kristine (Master thesis, 2015)Lichens are observed to decline when shrub covers increases due to global warming and reduced grazing in alpine and arctic areas. However, lichens are still prominent in many mountain habitats where they cover large areas. ... -
Essential oil and biodiversity study of Securidaca longipedunculata
Bahta, Teklebrihan Lijalem (Master thesis, 2017)securidaca is oil plant -
Experimental herbivore exclusion, shrub introduction, and carbon sequestration in alpine plant communities
Sørensen, Mia Vedel; Graae, Bente Jessen; Hagen, Dagmar; Enquist, Brian J.; Nystuen, Kristin Odden; Strimbeck, Richard (Journal article; Peer reviewed, 2018)Background Shrub cover in arctic and alpine ecosystems has increased in recent decades, and is predicted to further increase with climate change. Changes in shrub abundance may alter ecosystem carbon (C) sequestration and ... -
Extreme low temperature tolerance in woody plants
Strimbeck, Richard; Schaberg, Paul G.; Fossdal, Carl Gunnar; Schröder, Wolfgang; Kjellsen, Trygve Devold (Journal article; Peer reviewed, 2015)Woody plants in boreal to arctic environments and high mountains survive prolonged exposure to temperatures below -40°C and minimum temperatures below -60°C, and laboratory tests show that many of these species can also ... -
Functional group contributions to carbon fluxes in arctic-alpine ecosystems
Strimbeck, Richard; Sørensen, Mia Vedel; Graae, Bente Jessen; Lang, Simone I. (Journal article; Peer reviewed, 2019)Ongoing responses to climate change in arctic-alpine ecosystems, including the increasing dominance of deciduous shrubs, involve major shifts in plant functional group composition. Because rates of photosynthesis and ... -
Herbivores reduce seedling recruitment in alpine plant communities
H. Opedal, Øystein; Nystuen, Kristin Odden; Hagen, Dagmar; Holien, Håkon; Sørensen, Mia Vedel; Lang, Simone; Lindmo, Sigrid; Strimbeck, Richard; Graae, Bente Jessen (Peer reviewed; Journal article, 2021)Through changes in climate and other environmental factors, alpine tundra ecosystems are subject to increased cover of erect shrubs, reduced predictability of rodent dynamics and changes in wild and domesticated herbivore ... -
Lichens facilitate seedling recruitment in alpine heath
Nystuen, Kristin Odden; Sundsdal, Kristine; Opedal, Øystein Hjorthol; Holien, Håkon; Strimbeck, Richard; Graae, Bente Jessen (Peer reviewed; Journal article, 2019)Questions How do mat thickness, physical structure and allelopathic properties of terricolous mat‐forming lichens affect recruitment of vascular plants in dwarf‐shrub and lichen heath vegetation? Location The mountains of ... -
Light and Temperature Effects on Metabolite Concentration in Selected Herbs and Microgreens
Høyen, Begangancha Emilia (Master thesis, 2017)Increasing evidence from epidemiological studies has shown that vegetable consumption is an important determinant of health. These health benefits are attributed to the presence of phytochemicals in these vegetables or ... -
Metabolic Response of Maize (Zea mays L.) Seedlings to both Drought and Heat Stress
Anku, Kenneth Eteme (Master thesis, 2017)The development of resistant maize (Zea mays) varieties against drought and heat is on the rise as these abiotic stress factors affect maize production. Plants including maize respond by altering their metabolism to produce ... -
Metabolite changes in conifer buds and needles during bud break - Norway spruce (Picea abies) and European silver fir (Abies alba)
Dhuli, Priyanka (Master thesis, 2011)Background and objective: This research is based on the study of metabolites in conifers buds, when exposed to sudden high temperature in controlled environmental conditions in greenhouse. The purpose of the study was to ... -
Metabolite changes in conifer buds and needles during forced bud break in Norway spruce (Picea abies) and European silver fir (Abies alba)
Dhuli, Priyanka; Rohloff, Jens; Strimbeck, Richard (Journal article; Peer reviewed, 2014)Environmental changes such as early spring and warm spells induce bud burst and photosynthetic processes in cold-acclimated coniferous trees and consequently, cellular metabolism in overwintering needles and buds. The ... -
Moose browsing effects on boreal production forests – implications for ecosystems and human society
Kolstad, Anders Lorentzen (Doctoral theses at NTNU;2019:286, Doctoral thesis, 2019)Sammendrag: Den viktige elgen Utmarkbeite er trolig den mest utbredte arealbruken i Norge, som i verden forøvrig. Etter at mengden beitende husdyr begynte å ned på midten av forrige århundre har ville hjortedyr tatt ... -
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 ... -
Photosynthetic Response to increasing Temperatures - a Comparison between prostrate and erect alpine Shrubs
Eckert, Diana (Master thesis, 2015)As a response to climate change, shrub biomass has increased in alpine and arctic tundra ecosystems. Substantial shrub encroachment can lead to changes in carbon fluxes, due to a shift in community compositions and functional ... -
Photosynthetic Responses of maize (Zea mays L.) seedlings to heat and drought stress
Torgbor, Michael Nii Adjah (Master thesis, 2017)Like all other plants, maize (Zea mays L.) depends on the environment for growth. It is also an important food source for the continuously increasing human population. However, due to the recent changes in climate, maize ...