Seasonal flight patterns of <i>Ips typographus</i> in southern <scp>S</scp>weden and thermal sums required for emergence

Öhrn, Petter; Långström, Bo; Lindelöw, Åke; Björklund, Niklas

doi:10.1111/afe.12044

Cited by 42 publications

(29 citation statements)

References 34 publications

(66 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Several forest insect pests have benefitted from climate change and its drivers, such as heat spells and gales [1,11]. Traditional ground surveys are inadequate in locating the very first symptoms by phloem-consuming insect herbivores.…”

Section: Discussionmentioning

confidence: 99%

“…Karst. ), have been evident in the course of time, in mid and eastern parts of Europe, as well as in southern Norway and Sweden [9][10][11]. Since the year 2010, with a high accumulated temperature, the European spruce bark beetle (Ips typographus L. (I. typographus)) (Curculionidae, Scolytinae) has also triggered high tree mortality in south and mid parts of Finland, due to two annual generations of the pest [12].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Using UAV-Based Photogrammetry and Hyperspectral Imaging for Mapping Bark Beetle Damage at Tree-Level

Näsi

Honkavaara

Lyytikäinen‐Saarenmaa

et al. 2015

Remote Sensing

332

265

View full text Add to dashboard Cite

Low-cost, miniaturized hyperspectral imaging technology is becoming available for small unmanned aerial vehicle (UAV) platforms. This technology can be efficient in carrying out small-area inspections of anomalous reflectance characteristics of trees at a very high level of detail. Increased frequency and intensity of insect induced forest disturbance has established a new demand for effective methods suitable in mapping and monitoring tasks. In this investigation, a novel miniaturized hyperspectral frame imaging sensor operating in the wavelength range of 500-900 nm was used to identify mature Norway spruce (Picea abies L. Karst.) trees suffering from infestation, representing a different outbreak phase, by the European spruce bark beetle (Ips typographus L.). We developed a new processing method for analyzing spectral characteristic for high spatial resolution photogrammetric and hyperspectral images in forested environments, as well as for identifying individual anomalous trees. The dense point clouds, measured using image matching, enabled detection of single trees with an accuracy of 74.7%. We classified the trees into classes of healthy, infested and dead, and the results were promising. The best OPEN ACCESSRemote Sens. 2015, 7 15468 results for the overall accuracy were 76% (Cohen's kappa 0.60), when using three color classes (healthy, infested, dead). For two color classes (healthy, dead), the best overall accuracy was 90% (kappa 0.80). The survey methodology based on high-resolution hyperspectral imaging will be of a high practical value for forest health management, indicating a status of bark beetle outbreak in time.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Using UAV-Based Photogrammetry and Hyperspectral Imaging for Mapping Bark Beetle Damage at Tree-Level

Näsi

Honkavaara

Lyytikäinen‐Saarenmaa

et al. 2015

Remote Sensing

332

265

View full text Add to dashboard Cite

show abstract

“…Longer growth periods and increased temperature sums have enabled the development of more sister broods and even the development of the second generation in some summers Wermelinger and Seifert 1999;Öhrn et al 2014). Shorter periods of frozen ground and thunder-storms in the summertime have increased the amount of dead wood in the forests, which favours breeding bark beetles (Eriksson et al 2007).…”

Section: Spruce Pestsmentioning

confidence: 99%

“…Continuous monitoring of population levels and phenological surveys are needed for accurate risk estimates and as a basis for timely advice to forest owners about the best management practices . Logging of trees that are windblown at summertime will be more urgent because the swarming time of spruce bark beetles is longer than it used to be (Neuvonen and Viiri 2015;Öhrn et al 2014).…”

Section: Bark Beetles Attacking Norway Sprucementioning

confidence: 99%

Changing Climate and Outbreaks of Forest Pest Insects in a Cold Northern Country, Finland

Neuvonen

Viiri

2017

Springer Polar Sciences

View full text Add to dashboard Cite

Pest insect population dynamics are species specific and complex due to nonlinearities and interactions among different trophic levels. Consequently, the impacts of climate change on pests are also species specific and they are often difficult to predict. However, there are some clear examples of increasing forest pest risks due to a warming climate. The damage caused by the Eurasian spruce bark beetle has recently increased in Finland as a consequence of more frequent storm damage and longer growing seasons. In a warming climate, timely salvage and sanitation cuttings will be needed to guarantee the sustainability of the forestry. Several defoliating pests overwinter in the egg stage. Warmer winters may not kill the eggs and, therefore, the incidence of outbreaks is predicted to increase in the northern and continental areas. The most important societal implications will be due to Geometrids attacking subarctic mountain birch forests. Together with heavy reindeer grazing, Geometrids reduce the resilience of the ecosystem and they are threatening the sustainability of local livelihoods.

show abstract

“…For example, Öhrn et al (2014) reported region-specific flight patterns for Sweden and concluded that the understanding of key factors for emergence would facilitate efficient pest management and improve models of population dynamics. In the case of I. typographus, its spring swarming has been intensively investigated by numerous researchers in Europe (Annila 1969, Zumr 1982, Harding & Ravn 1985, Lobinger 1994, Wermelinger & Seifert 1998, Faccoli 2009, Öhrn et al 2014, focussing on the minimum temperature threshold for flight activity and the thermal sums needed for beetle development stages. Most of these studies employ spatially and/or temporally highly resolved data sets for bark beetle development.…”

Section: Introductionmentioning

confidence: 99%

Forecasting bark beetle early flight activity with plant phenology

Zang¹,

Helm²,

Sparks³

et al. 2015

Clim. Res.

View full text Add to dashboard Cite

Seasonal flight patterns of Ips typographus in southern Sweden and thermal sums required for emergence

Abstract: Abstract1 The spruce bark beetle Ips typographus is the major tree-killing bark beetle in Eurasia.

Cited by 42 publications

References 34 publications

Using UAV-Based Photogrammetry and Hyperspectral Imaging for Mapping Bark Beetle Damage at Tree-Level

Using UAV-Based Photogrammetry and Hyperspectral Imaging for Mapping Bark Beetle Damage at Tree-Level

Changing Climate and Outbreaks of Forest Pest Insects in a Cold Northern Country, Finland

Forecasting bark beetle early flight activity with plant phenology

Contact Info

Product

Resources

About