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Analysing and modelling spatial patterns to infer the influence of environmental heterogeneity using point pattern analysis, individual-based simulation modelling and landscape metricsHesselbarth, Maximilian H.K. 06 April 2020 (has links)
No description available.
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Impacts of a catastrophic ice storm on an old-growth, hardwood forestHooper, Michael Craig. January 1999 (has links)
No description available.
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Ecology of American beech and sugar maple in an old-growth forestArii, Ken January 2002 (has links)
No description available.
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Diversity of canopy spiders in north-temperate hardwood forestsLarrivée, Maxim. January 2009 (has links)
No description available.
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Kolinlagringar i Sveriges skogar : En jämförelse mellan produktionsskog och urskog / Carbon storage in Swedish forests : A comparison between production forest and old-growth forestBrunzell, Alexandra January 2022 (has links)
För klimatet spelar skogen en viktig roll eftersom den binder in koldioxid från atmosfären. Genom fotosyntes binds kolet in i biomassan och när organiskt material bryts ned bidrar det till kolinlagringar i marken. Idag finns det många studier om skogens kolinlagringar, men de undersöker endast nettoinbindningen av kolet i skogen och få studier visar hur mycket kol som totalt är inlagrat i en skog. Det finns inga studier om hur det ser ut i Sverige och det finns få studier som visar på skillnaden i kolinlagring mellan en produktionsskog och en urskog. I den här litteraturstudien presenterar jag hur mycket kol som är inbundet i den svenska skogen och hur det skiljer sig mellan produktionsskog och urskog. Genom att applicera data från en studie som undersökte hur mycket kol som är inbundet i skogen i Kanada på den svenska skogen kom jag fram till att det finns totalt mellan 5 413 och 6 798 miljoner ton kol inlagrat i den svenska skogen, men mer kol skulle kunna lagras. Medelåldern för när träd slutavverkas är i Sverige 101 år. Jag kom fram till att det lagras in ungefär 53 till 75 ton mer kol per hektar i en skog som är äldre än 140 år än i en skog som är mellan 101 och 120 år. Resultatet visar att det binds in mer kol i en urskog än i en produktionsskog och att det är viktigt att bevara de urskogar som idag finns för att kunna möta de klimatproblem vi står inför. / For the climate, the forest plays an important role because it binds carbon dioxide from the atmosphere. Through photosynthesis, carbon is bound into the biomass and degradable organic material contributes to carbon storage in the soil. There are many studies on the forest carbon deposits, but they only examine the net binding of carbon, and few studies show how much carbon is stored in total. There are no studies on what carbon storage looks like in Sweden and few studies that show the difference in carbon storage between production forests and old-growth forests. In this literature study, I present how much carbon is bound in Swedish forests and how it differs between production forest and old-growth forest. By applying data from a study that examined how much carbon is bound in Canadian forests on Swedish forests, I concluded that there is a total of between 5 413 and 6 798 million tonnes of carbon stored in Swedish forests, but more carbon could be stored. In Sweden, the average age for when trees are felled is 101 years. I concluded that approximately between 53 and 75 tonnes more carbon per hectare is stored in a forest that is older than 140 years than in a forest that is between 101 and 120 years. The results show that more carbon is bound in an old-growth forest than in a production forest and that it is important to preserve the old-growth forests to reduce the climate problems we face.
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The Role of Old Regrowth Forests for Avian Diversity Conservation in a Southwestern Ohio LandscapeMeans, Julianna Lynn 06 August 2010 (has links)
No description available.
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Wildfire Impacts on Nest Provisioning and Survival of Alaskan Boreal OwlsAnderson, Aaron George 25 April 2017 (has links)
No description available.
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Effects of forest management on carbon sequestrationViding, Rasmus January 2021 (has links)
The warming of our planet is a direct consequence of anthropogenic emissions with carbon dioxide as the main driver. A need to mitigate carbon emissions is urgent and forests can be a part of the solution since they sequester and stock carbon during their lifetime This study has shown that production forests can sequester carbon to a higher degree since they consist of younger trees which are better at sequestration than older trees. But the study also show that older forests keep sequestering carbon and might not be carbon neutral as previously thought. Old growth forests contain higher carbon stocks than younger production forests since they often remain unmanaged and can continuously accumulate carbon into living and dead biomass as well as the soil. Production forests also accumulate carbon, but it is not nearly the same amount as in old growth forests. With regard to meeting the 1,5-degree goal set by the IPCC, i.e., cutting emissions with half until 2030 and having net zero carbon dioxide emissions until 2050. Harvesting with clear-cutting was found to be worse compared with harvesting at a lower frequency which causes less emissions but still supplies wood products to the industry. The result also show that we must protect more old growth and unmanaged forests that can sequester and stock carbon longer to be able to succeed with the 1,5-degree goal. The debate climate in Sweden is heated and opinions often differ. The difference may depend on the time frame or how results are interpretated.
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The effects of alternative harvesting practices on saproxylic beetles in eastern mixedwood boreal forest of Quebec /Webb, Annie. January 2006 (has links)
No description available.
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The water and energy dynamics of an old-growth seasonal temperate rainforestLink, Timothy E. 02 October 2001 (has links)
In the Pacific Northwest (PNW), concern about the impacts of climate and land
cover change on water resources, flood-generating processes, and ecosystem dynamics
emphasize the need for a mechanistic understanding of the interactions between forest
canopies and hydrological processes. A detailed measurement and modeling program
during the 1999 and 2000 hydrologic years characterized hydrological conditions and
processes in a 500-600 year old Douglas fir-western hemlock seasonal temperate
rainforest. The measurement program included sub-canopy arrays of radiometers,
tipping bucket rain gauges, and soil temperature and moisture probes, to supplement a
vertical temperature and humidity profile within the forest canopy. Analysis of the
precipitation interception characteristics of the canopy indicated that the mean direct
throughfall proportion was 0.36, and the mean saturation storage was 3.3 mm.
Evaporation from small storms insufficient to saturate the canopy comprised 19% of
the net interception loss, and canopy drying and evaporation during rainfall accounted
for 47% and 33% of the net loss, respectively. Results of the measurement program
were used to modify the Simultaneous Heat and Water (SHAW) model for forested
systems. Changes to the model include improved representation of interception
dynamics, stomatal conductance, and within-canopy energy transfer processes. The
model effectively simulated canopy air and vapor density profiles, snowcover
processes, throughfall, soil water content profiles, shallow soil temperatures, and
transpiration fluxes for both a calibration period and for an uncalibrated year. Soil
warming at bare locations was delayed until most of the snowcover ablated due to the
large heat sink associated with the residual snow patches. During the summer,
simulated evapotranspiration decreased from a maximum monthly mean of 2.17 mm
day����� in July to 1.34 mm day����� in September, as a result of declining soil moisture and
net radiation. Our results indicate that a relatively simple parameterization of the
SHAW model for the vegetation canopy can accurately simulate seasonal hydrologic
fluxes in this environment. Application and validation of the model in other forest
systems will establish similarities and differences in the interactions of vegetation and
hydrology, and assess the sensitivity of other systems to natural and anthropogenic
perturbations. / Graduation date: 2002
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