Assessing Risks of the Spruce Bark Beetle (Ips typographus L.) Infestation in Wind-Disturbed Boreal Forest.

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The survival of coniferous forests in northern latitudes is at risk with the advance of climate change. Hotter climate is favoring reproduction of their main enemies – bark beetles. There is an urgent need to focus on adding information on risk and severity of bark beetle infestations linked with stand suitability, heavy winds, and cumulative climatic risks. Our main goal was to produce tools for risk assessment of bark beetle infestations and for seasonal forecasts. We outline an approach to predict population density of a pest and risks of forthcoming mortality of Norway spruce (Picea abies (L.) Karst.), caused by the spruce bark beetle (Ips typographus L.). To develop a methodology, pheromone traps, infestation symptoms of trees, annual dynamics of damage spots, and remote sensing tools were applied in Ruokolahti, SE Finland over seven years. The study area met a massive wind disturbance in 2010 leading to eruptive populations of the bark beetle. Altogether 187 traps were baited with aggregation pheromone of I. typographus, close to mature Norway spruce stands. Our risk assessment was based on population level estimates, environmental and stand parameters, and climatic data. Crown symptoms were visually assessed, and classified into four infestation classes. Low-cost hyperspectral imaging technology was tested by small unmanned aerial vehicle (UAV) platform. Population, environmental and climatic data can be incorporated into forest health monitoring systems, producing risk maps and models for target areas. Furthermore, a methodology based on a high-resolution hyperspectral imaging will be of high practical value for forest health surveys.
Bidragets titel på inmatningsspråkKirjanpainajaesiintymän riskinarviointi tuulituhojen vaikuttamassa boreaalisessa metsässä
Originalspråkengelska
Titel på gästpublikationPopulation dynamics & integrated management of forest insects
RedaktörerAndrea Battisti, Deepa Pureswaran, Manuela Branco
Antal sidor1
Volym2019
UtgivningsortCanadian Forest Service
Utgivningsdatum8 jul 2019
Sidor37
StatusPublicerad - 8 jul 2019
MoE-publikationstypB3 Ej refererad artikel i konferenshandlingar
EvenemangIUFRO workshop ‘Population Dynamics and Integrated Management of Forest Insects’ - Quebec, Quebec, Kanada
Varaktighet: 8 jul 201912 jul 2019
https://www.iufroqc2019.com/

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  • 4112 Skogsvetenskap

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