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Dissertations / Theses on the topic 'Spruce Bark Beetle outbreak'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Hammarlund, Per Emil. "Detecting Spruce Bark Beetle Infestations with Satellite Imagery." Thesis, KTH, Skolan för elektroteknik och datavetenskap (EECS), 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-281283.

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Sveaskog is Swedens largest forest owner, owning 14 percent of the Swedish forest lands. Recently, due to warmer and drier summers as a consequence of climate change, spruce bark beetles have caused damages at a massive scale. In 2019 Sogeti developed a promising first product for monitoring the vitality of large areas through the use of Sentinel-2 data by comparing images from the same month between two years, and the results from this first product where promising. To take the detection of bark beetle infestations to the next stage of development, supervised learning was used. Models where t

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2

Somor, Andrew. "Quantifying streamflow change following bark beetle outbreak in multiple central Colorado catchments." Thesis, The University of Arizona, 2010. http://hdl.handle.net/10150/193435.

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Over the last decade, millions of acres of western North American forest have been reduced to areas of standing dead trees following eruptions in bark beetle populations. This thesis provides up-to-date information on streamflow response to the recent bark beetle outbreak in subalpine forests of the Colorado Rockies. Streamflow and climate measures are evaluated in eight central Colorado catchments with long-term data records and varying levels of beetle outbreak. No detectable streamflow change is observed in 7 of 8 highly impacted catchments. A significant reduction in streamflow is observe

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3

Banner, Allen Vernon. "Detection of bark beetle-attacked spruce using computer-based image analysis." Thesis, University of British Columbia, 1986. http://hdl.handle.net/2429/25846.

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The spruce beetle (Dendroctonus rufipennis Kirby) is the most destructive forest pest affecting mature spruce stands in British Columbia. A variety of responses to curtail the spread of bark beetle infestations exist. The responses, however, depend upon early detection of the infestations to minimize the cost of treatment and reduce losses of timber. It has been demonstrated that bark beetle-attacked spruce can be detected using visual interpretation of large scale colour infrared film (Churcher 1984; Churcher and McLean 1984; Murtha 1985; Murtha and Cozens 1985). These studies indicate that

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4

Hedgren, Per Olof. "Dead wood retention and the risk of bark beetle attack /." Uppsala : Swedish University of Agricultural Sciences, 2002. http://diss-epsilon.slu.se/archive/00000188/.

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Thesis (doctoral)--Swedish University of Agricultural Sciences, 2002.<br>Thesis statement in Swedish and English abstract inserted. Appendix reprints four papers and manuscripts, three co-authored with others. Includes bibliographical references. Also issued electronically via World Wide Web in PDF format; online version lacks appendix.

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5

Cederquist, Isac. "Bioinspired smell sensor to trace pheromone released by the European spruce bark beetle." Thesis, Linköpings universitet, Institutionen för fysik, kemi och biologi, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-173063.

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Forests have as a of late become increasingly plagued with bark beetle infestations as a result of climate change. The damage caused by tree killing bark beetles has within recent years seen a substantial increase. Detecting and removing infested trees at an early stage is an essential part of mitigating the spread of and the damage caused by the beetle. Today, the most common way of early detection is visual detection by forestry personnel. However, this is time consuming with highly variable results. In this thesis a novel approach to tracing the European spruce bark beetle through pheromone

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6

Pettit, Jessika M. "Engelmann Spruce Survival and Regeneration After an Epidemic Spruce Beetle Outbreak on the Markagunt Plateau in Southern Utah." DigitalCommons@USU, 2018. https://digitalcommons.usu.edu/etd/7199.

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Bark beetle outbreaks are becoming more intense and severe when coupled with the effects of climate change. Engelmann spruce (Picea engelmannii) is one such species facing large-scale, epidemic spruce beetle outbreaks. Large-scale disturbances, such as beetle outbreaks, have major consequences for the future success of the ecosystem, thus highlighting the importance of understanding what promotes amplified outbreaks as well as their effects on future seedling establishment. Our research focused on two parts of a large-scale beetle outbreak: the mortality of spruce trees and the subsequent rege

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7

Eriksson, Gustav. "Granbarkborre (Ips typographus) och Skyddad skog : Orsakar skyddad natur granbarkborreangrepp i produktionsskog?" Thesis, Umeå universitet, Institutionen för ekologi, miljö och geovetenskap, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-187280.

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The aim of this report was to investigate whether the management of protected forests cause increased risk of infestation by the European spruce bark beetle (Ips typographus) in production forests, and whether the risk of infestation in production forests is greater in the vicinity of protected forests. The survey was conducted by using GIS-data covering suspected attacks and forests that are susceptible to infestations. The proportion of infested forests in three different buffer zones located around the protected areas were compared. The results show no evidence suggesting that protected are

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8

Blomquist, Johan. "Minskad årsringsbredd hos gran (Picea abies) : - en vitalitetsförlust efterföljande en torkperiod." Thesis, Linnéuniversitetet, Institutionen för skog och träteknik (SOT), 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-96650.

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Effekten av torka på gran kan var stor. Sommaren 2018 var en av de torraste och varmaste somrarna på länge. En sådan period påverkar ofta granars vitalitet negativt och kan leda till en ökad risk för angrepp av granbarkborre. Denna studie har undersökt hur årsringsbredden på gran har förändrats till följd av torka genom att jämföra årsringsbredder före torkperioden med de efter. Mätningar genomfördes med en resistograf som genererade datafiler som sedan sammanställdes och analyserades, främst med hjälp av Excel. Vidare noterades markfuktighet, bonitet och angrepp av granbarkborre. Dessa faktor

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9

Mietkiewicz, Nathan. "Interactions between bark beetle outbreak and wildland fire in intermountain subalpine forests of the western United States| legacies and future projections under a changing climate." Thesis, Clark University, 2016. http://pqdtopen.proquest.com/#viewpdf?dispub=10143552.

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<p> Over the past 30 years, wildland fire and native bark beetle outbreaks have increased in intensity, severity, and extent across the fire-prone forests of the western United States, raising concerns about whether bark beetle outbreaks increase wildfire severity and/or wildfire occurrence. Furthermore, current estimates predict a two-fold increase in area burned by wildland fires over the next 25 years and bark beetles are forecasted to expand in the coming century, shifting toward higher latitudes and elevations. Thus, it is important to better understand how insect-driven tree mortality ma

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10

Bisrat, Simon A. "Modeling Bark Beetle Outbreak and Fire Interactions in Western U.S. Forests and the Invasion Potential of an Invasive Puerto Rican Frog in Hawaii Using Remote Sensing Data." DigitalCommons@USU, 2010. https://digitalcommons.usu.edu/etd/703.

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I used Moderate-Resolution Imaging Spectroradiometer (MODIS) imagery to answer two ecological questions. In the first project, I investigated the interactions between bark beetle-caused tree mortality and fire occurrence in western U.S. forests. I used remotely sensed fire data detected by MODIS satellite and bark beetle-caused tree mortality data. I tested the hypothesis that there is an increased probability of fire incidence in bark beetle-damaged forests compared to healthy forests using conditional probability modeling across the national forests of the western U.S. regardless of forest t

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11

Schorn, Andrea [Verfasser]. "How to bark up the right tree – Novel metagenomic laccase-like multicopper oxidases from the European spruce bark beetle Ips typographus. : Neue Laccase-artige Multi-Kupfer-Oxidasen aus dem Metagenom des Buchdruckers Ips typographus / Andrea Schorn." Hamburg : Staats- und Universitätsbibliothek Hamburg Carl von Ossietzky, 2020. http://d-nb.info/1221276425/34.

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12

Hammerbacher, Almuth [Verfasser], Jonathan [Akademischer Betreuer] Gershenzon, Wilhelm [Akademischer Betreuer] Boland, and Thomas [Akademischer Betreuer] Vogt. "Biosynthesis of polyphenols in Norway spruce as a defense strategy against attack by the bark beetle associated fungus Ceratocystis polonica / Almuth Hammerbacher. Gutachter: Jonathan Gershenzon ; Wilhelm Boland ; Thomas Vogt." Jena : Thüringer Universitäts- und Landesbibliothek Jena, 2012. http://d-nb.info/1019970065/34.

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13

Dworschak, Kai [Verfasser], Reinhard [Akademischer Betreuer] Schopf, Ralph P. [Akademischer Betreuer] Kühn, and Annette [Akademischer Betreuer] Menzel. "Ecophysiology of the European spruce bark beetle (Ips typographus L.) : Factors affecting individual fitness, dispersal and population dynamics / Kai Dworschak. Gutachter: Ralph P. Kühn ; Reinhard Schopf ; Annette Menzel. Betreuer: Reinhard Schopf." München : Universitätsbibliothek der TU München, 2013. http://d-nb.info/1046176080/34.

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14

Magnebäck, Anders, and Peter Fälth. "Topografi och markfuktighet för granbarkborreskadad skog." Thesis, Linnéuniversitetet, Institutionen för skog och träteknik (SOT), 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-96231.

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En stor skadegörare på de svenska granskogarna är den åttatandade granbarkborren Ips typographus (L.). Torkstress, vattentillgång och landskapets topografi är faktorer som påverkar granens vitalitet. Om granen har en låg vitalitet riskerar den i högre utsträckning att bli angripen av granbarkborren. Syftet med studien var att analysera topografi och markfuktighet för granbarkborreskadad skog. Områden med skadade träd och oskadade träd jämfördes i GIS-programmet QGIS för att se om det fanns en skillnad med avseende på markfuktighet, lutning, lutningsriktning och höjd över havet. Resultatet visa

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15

Meurisse, Nicolas. "Chemical ecology of rhizophagus grandis (Coleoptera: Monotomidae) and its application to the biological control of dendroctonus micans (Coleoptera: Scolytinae)." Doctoral thesis, Universite Libre de Bruxelles, 2008. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/210567.

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The Eurasian spruce bark beetle Dendroctonus micans is a major pest of spruce which is expanding its range in France, Turkey, England and Wales. Its monospecific predator Rhizophagus grandis has followed naturally the bark beetle into most areas and, since the 1960s, has also been mass-produced and successfully released within newly infested locations. <p>In this scope, the development of an effective trapping method would be very useful to assess the bark-beetle presence at previously uninfested sites, or predator establishment after release or natural spread. We demonstrated the efficiency o

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16

HREŽÍKOVÁ, Markéta. "Evaluation of Spruce Forest Regeneration and Vegetation Changes." Master's thesis, 2013. http://www.nusl.cz/ntk/nusl-166246.

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The impact of a bark beetle outbreak, and the following sanitation management actions, on the mountain spruce forest in the central part of the Šumava Mountains were compared after twelve years of development. The survey was focused on natural regeneration of trees and herb-layer vegetation.

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17

Faflák, Jiří. "Formování postojů žáků v hodinách zeměpisu na příkladu problematiky kůrovcových kalamit." Master's thesis, 2013. http://www.nusl.cz/ntk/nusl-329748.

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Shaping of students' attitudes in geographical education - the issue of Ips typographus outbreaks Abstract The diploma thesis deals with shaping the students' attitudes by utilising various texts during the geography classes. This experiment is shown on particular problem of Spruce Bark Beetle in the National Park of Šumava. There are two main streams towards this issue of Spruce Bark Beetle-one of them promotes the idea of incorporating the human intervention, while reducing the disaster, the other follows the opposite attitude towards the outbreak of the Spruce Bark Beetle, and that is not t

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18

DAVÍDKOVÁ, Markéta. "Sister broods in the spruce bark beetle, \kur{Ips typographus} (L.)." Master's thesis, 2014. http://www.nusl.cz/ntk/nusl-172996.

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The aim of this thesis was to elucidate the establishment of sister broods in the spruce bark beetle, Ips typographus (L.), at three localities of different elevation in Sumava Mountains. Fecundity, sex ratio in the offspring, regeneration feeding, development of reproductive organs, re-emergence rate and other ecophysiological topics were studied as well.

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19

BROŽ, Zdeněk. "Modelling of spruce forest decay caused by the European spruce bark beetle in the area of Bohemian Forest using GIS." Master's thesis, 2016. http://www.nusl.cz/ntk/nusl-204441.

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This thesis deals with the bark beetle population gradation which resulted in dieback of montane spruce forest in the central part of the Bohemian Forest, Czech Republic, during 1991 - 2000. A spatio-temporal model of changing land cover has been made using remote sensing and GIS methods. The statistical analyses have been made using generalized linear models (GLM). The possible effect of various conditions and environmental factors at landscape as well as the stand level has been discussed.

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20

BARTOŠOVÁ, Eva. "Vliv eneregetických rezerv na úspěšnost přezimování a reprodukční potenciál lýkožrouta smrkového (\kur{Ips typographus} (L.))." Master's thesis, 2010. http://www.nusl.cz/ntk/nusl-48198.

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21

ŠVEHLOVÁ, Kateřina. "Analysis of heat shock protein genes expression in spruce bark beetle \kur{Ips typographus} and their importance for survival upon exposure to heat." Master's thesis, 2011. http://www.nusl.cz/ntk/nusl-97139.

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The aim of this work was to examine the expression of certain Hsp genes upon heat exposure in spruce bark beetle Ips typographus. We determined the level in unstressed and heat-exposed animals, and attempted to assess the importance of Hsp proteins for animals' survival upon heat treatment. We used RNA interference to knock down the expression of these genes, and analyzed the influence on animals exposed to elevated temperatures.

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22

MORAVCOVÁ, Martina. "Adipokinetické hormony a energetický metabolismus lýkožrouta smrkového (\kur{Ips typographus} L.)." Master's thesis, 2012. http://www.nusl.cz/ntk/nusl-136503.

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The aim of the thesis was to elucidate the occurrence of adipokinetic hormones in the spruce bark beetle (Ips typographus) by competitive ELISA and LC/MS analysis. Total lipid and carbohydrate content as well as levels of glucose, trehalose and glycogen were measured to characterize physiological changes during particular phases of the life cycle.

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23

VAČKÁŘOVÁ, Tereza. "Srovnání efektivity obranných opatření proti lýkožroutu smrkovému (Ips typographus (L.)) na vybrané lokalitě Lesního Závodu Boubín." Master's thesis, 2013. http://www.nusl.cz/ntk/nusl-154476.

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The efficiency of various protective measures against the Spruce bark beetle (pheromone-baited traps, trap trees, poisoned traps - tripods.) and the impact of insecticide-treated trap trees on non-target organisms were studied in weekly periods in areas in the altitude of 1000m above sea level. Tree traps proved to be of much higher effectivity with an average of 3307 caught spruce bark beetles in comparison with pheromone-baited traps with only 457 beetles within the same period. Poisoned traps ? tripods baited with pheromone (FeSex Typo, producer ? Karel Ubik, CR) were more effective than ph

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24

KOKOŘOVÁ, Petra. "Společenstva pancířníků (Acari: Oribatida) přirozeně se vyvíjejících a asanovaných horských smrčin na Šumavě." Master's thesis, 2015. http://www.nusl.cz/ntk/nusl-187607.

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The main aim of this study was to describe and compare communities of oribatid mites of selected areas in mountain spruce forests near Březník in the Šumava National Park, where different types of management were used after the spruce dieback caused by bark beetle gradation more than 15 years ago. Naturally regenerating and salvage logged areas were compared. Significant differences were found in the oribatid mite community composition between the areas with different types of used management. The oribatid mite community in naturally regenerating areas was in better shape and its abundance and

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25

Kadeřávková, Lucie. "Problematika smrkových monokultur v souvislosti s výskytem kůrovců v NP Šumava s aplikací do výuky." Master's thesis, 2018. http://www.nusl.cz/ntk/nusl-382993.

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The diploma thesis deals with the issues of the spruce monocultures in the relation to the incidence of the bark beetle (Ips typographus) in the Šumava National park. The aim of the thesis is not only to unify and arrange the information, but also find out the level of knowledge about this topic among the pupils of the ninth grade of the basic school. The work also shows the level of knowledge of the pupils about the related problems and what are their opinions and suggested solutions. The thesis is divided into the theoretical and practical part. The theoretical part consists of eight chapter

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26

Beranová, Jana. "Dlouhodobá dynamika disturbancí smrkových lesů ve Vysokých Tatrách." Master's thesis, 2018. http://www.nusl.cz/ntk/nusl-386886.

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Spruce forest is an important production ecosystem for our civilization. Its development can be affected by three main types of disturbances: forest fire, windstorms and spruce bark beetle attack. Experiences with a massive and long-term attack of spruce bark beetle in the Šumava mountains and a strong windstorm in 2004 in the spruce forest in the High Tatra provoke questions, how natural are such severe disturbances. To understand the current development of forest ecosystems, it is necessary to study past structure of these forests and frequency of forest disturbances. This work is about loca

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27

KOTRC, Miroslav. "Iniciální výzkum náchylnosti smrku ztepilého k napadení lýkožroutem smrkovým z hlediska dlouhodobého působení stresových faktorů." Master's thesis, 2014. http://www.nusl.cz/ntk/nusl-180581.

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This thesis is a contribution to understanding of predisposition of solitary Norway spruce (Picea abies [L.] Karst.) to bark beetle (Ips typographus (L.)) attack. The predisposition is estimated from long term effects of multiple stress, which are determined by tree crown transformation. By virtue of created model, it was documented that some environmental variables could have considerable effect on tree crown transformation. Tree crown transformation is generally considered a mirror of spruce health status.

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28

STAŇKOVÁ, Pavla. "The effect of forest management and plant dominant on nitrogen transformation in soils of acidified mountain spruce forests in the Bohemian Forest National Park." Master's thesis, 2013. http://www.nusl.cz/ntk/nusl-166251.

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The aim of this study was to compare and contrast mineral and microbial nitrogen concentrations in soils of semi-natural and natural mountain spruce forests in the Březník area, the Bohemian Forest National Park, under dead wood and four plant dominants with respect to different forest management after windstorm and bark beetle events applied in 1997.

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29

POUSKA, Václav. "The role of wood decay fungi in the dynamics of a mountain spruce forest." Doctoral thesis, 2012. http://www.nusl.cz/ntk/nusl-110456.

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This thesis is focused on environmental preferences of wood-decaying fungi and their relationships with forest structure and development. Relationships of fungi to properties of wood and forest stands were studied on the basis of field observations in Central-European mountain spruce forests. Plot-based approach was used to reveal a general pattern in the diversity of fungi within a single forest stand and between different stands. The analysis of stand structure provided a background for plot-based approach. Substrate-based approach was used to study single species preferences and their commu

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30

Kolářová, Zuzana. "Charakteristika společenstva hub na opadu smrku ztepilého kultivací a analýzou T-RFLP." Master's thesis, 2012. http://www.nusl.cz/ntk/nusl-306673.

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Fungi have a key role in the decomposition of coniferous litter and affect nutrient cycling in forest ecosystems. Therefore, great emphasis is placed on exploring the diversity of these organisms. The aim of this thesis was to describe fungal diversity in spruce litter and revealed temporal development of this community in a forest regenerating after bark beetle outbreak. Another objective was to compare sites with different length of bark beetle damage. The study area was located in the Bohemian Forest mountain range. Litter bags with spruce needles were placed on the forest soil and several

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31

Hurling, Rainer. "Zur Flugaktivität und Brutherdentwicklung des Buchdruckers Ips typographus (L.)." Doctoral thesis, 2002. http://hdl.handle.net/11858/00-1735-0000-0006-B15F-E.

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Hořejší, Michal. "Kritická analýza diskurzu o Národním parku Šumava." Doctoral thesis, 2020. http://www.nusl.cz/ntk/nusl-411812.

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This thesis focuses on critical analysis of the discourse on the Bohemian Forest National Park (BFNP) between 1991 and 2010. This large-size protected area has over the long term been the subject of highly critical debate among various participants including top political representatives, particularly as a result of several cases of massive disturbances of mature forest stands. Hence this discussion offers some very suitable material for an analysis aiming to help expose the links between regional subjects and general politics - and to demonstrate the relations between language and power. The

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