Influence of different forest protection strategies on spruce tree mortality during a bark beetle outbreak

Mezei, Pavel; Blaženec, Miroslav; Grodzki, W.; Škvarenina, Jaroslav; Jakuš, Rastislav

doi:10.1007/s13595-017-0663-9

Cited by 25 publications

(21 citation statements)

References 82 publications

(112 reference statements)

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“…are shaped by disturbances, ranging in severity from low-to stand-replacing. The main drivers of such disturbances in the Carpathians are wind and bark beetle outbreaks [2,3], the latter usually initiated by extreme weather events [4,5] and affected by forest management [6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Potential Solar Radiation as a Driver for Bark Beetle Infestation on a Landscape Scale

Mezei

Potterf

Škvarenina

et al. 2019

Forests

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In recent decades, Norway spruce (Picea abies L. Karst.) forests of the High Tatra Mountains have suffered unprecedented tree mortality caused by European spruce bark beetle (Ips typographus L.). Analysis of the spatiotemporal pattern of bark beetle outbreaks across the landscape in consecutive years can provide new insights into the population dynamics of tree-killing insects. A bark beetle outbreak occurred in the High Tatra Mountains after a storm damaged more than 10,000 ha of forests in 2004. We combined yearly Landsat-derived bark beetle infestation spots from 2006 to 2014 and meteorological data to identify the susceptibility of forest stands to beetle infestation. We found that digital elevation model (DEM)-derived potential radiation loads predicted beetle infestation, especially in the peak phase of beetle epidemic. Moreover, spots attacked at the beginning of our study period had higher values of received solar radiation than spots at the end of the study period, indicating that bark beetles prefer sites with higher insolation during outbreak. We conclude that solar radiation, easily determined from the DEM, better identified beetle infestations than commonly used meteorological variables. We recommend including potential solar radiation in beetle infestation prediction models.

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Section: Introductionmentioning

confidence: 99%

Potential Solar Radiation as a Driver for Bark Beetle Infestation on a Landscape Scale

Mezei

Potterf

Škvarenina

et al. 2019

Forests

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“…Similar, although somehow reduced due to bark beetle migration between closely located stands (Gries 1985), positive effect of active protection expressed by lower mortality of spruces infested by the bark beetles in the stands subjected to the processing and removal of broken and fallen trees, was observed during the presented survey. This indicated once again that the application of forest protection measures aimed for the reduction of breeding resources and mitigation of I. typographus reproduction, formally allowed in the zone of active nature protection, is justified and useful, as it was demonstrated based on the observations from previous bark beetle outbreaks in the Tatra (Grodzki et al 2006a;Grodzki and Guzik 2009;Mezei et al 2017;Grodzki and Gąsienica Fronek 2017a).…”

Section: Discussionmentioning

confidence: 93%

The European spruce bark beetle Ips typographus (L.) in wind-damaged stands of the eastern part of the Tatra National Park – the population dynamics pattern remains constant

Grodzki

Fronek

2019

Folia Forestalia Polonica

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In March 2017, in the eastern part of the Tatra National Park in Poland, large windthrowns affected the passively and actively protected Norway spruce Picea abies stands. In early 2018, a set of 12 small research plots (20 trees on each plot) was established in the Norway spruce stands next to the windblown area – 6 in the stands under active nature protection (broken and fallen trees processed in 2017), and 6 in the stands under passive nature protection (trees left on the ground). Living trees on the plots were regularly checked during the growing season in order to identify and register the spruces infested by Ips typographus, which were dissected in 2 or 4 half-meter sections. 155 spruces (64%) infested by I. typographus were recorded on all 12 plots: 118 out of 120 (98%) in passive and 37 out of 120 trees (31%) in active protection. Mean infestation density calculated on 128 samples from 47 trees was higher under passive than under active protection (1.23 and 0.92 mating chamber per 1 dm2, respectively). Among 1709 gallery systems, those with 2 maternal galleries prevailed (63.0%); the mean share of females was higher in passive than in active protection zone (63.1 and 59.6% respectively). The mean number of progeny per one female was higher in active than in passive protection zone (20.23 and 19.12 respectively). I. typographus attack on standing trees had lower intensity in the stands previously subjected to the processing and removal of fallen and broken trees, which indicates positive effect of implemented active protection procedures. The parameters describing I. typographus population on attacked trees, as well as low activity of natural enemies, demonstrate its reproduction potential and resulting high risk of a new outbreak, according to the pattern known earlier from the other areas in Poland and Europe.

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“…Air pollution, prolonged summer droughts in the years 2003-04 and 2006-07, and the catastrophic hurricane of 2004 resulted in the weakening of spruce stands in the montane zone [84,85]. Bark beetles attacked the weakened trees as part of a large-scale infestation which affected a considerable forest area in the Silesian Beskids within a short time [86]. Spruce monocultures in large areas were degraded to such an extent that tree clearance appeared necessary (Figure 4b).…”

Section: Discussionmentioning

confidence: 99%

The Human Impact on Changes in the Forest Range of the Silesian Beskids (Western Carpathians)

Sobala

Rahmonov

2020

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Changes in forest range are caused by human activity in many regions of the world. The aim of this paper is an attempt to determine the impact of pastoral and forest management on changes in forest cover and their fragmentation in the Silesian Beskids (southern Poland) in 1848–2015. Historical maps and landscape metrics were used to study changes in forest cover. Using a digital map of forests, analyses of the distribution of forest communities, site types and their condition were conducted. Since 1848 the forest area has increased by 11.8%, while the area of forest core zones has increased by 16.2%, accompanied by a 4.5% reduction in the forest’s internal buffer zone. From the mid-nineteenth century, the forest range has been systematically growing from 82.1 to 93.9% because of the pastureland abandonment and forest regeneration, despite temporary logging resulting in forest fragmentation. Minor changes in core area index (CAI) from 80.41 to 87.55 indicate that pastoral economy did not result in considerable fragmentation of forests. The impact of forest management was greater as the sites characterised by natural condition occupy only 28% of the forest land and anthropogenically transformed ones dominate occupying over 50%. An artificial spruce monoculture was died-off and large felling areas were created at the beginning of the twenty-first century covering almost 40% of the study area.

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Influence of different forest protection strategies on spruce tree mortality during a bark beetle outbreak

Cited by 25 publications

References 82 publications

Potential Solar Radiation as a Driver for Bark Beetle Infestation on a Landscape Scale

Potential Solar Radiation as a Driver for Bark Beetle Infestation on a Landscape Scale

The European spruce bark beetle Ips typographus (L.) in wind-damaged stands of the eastern part of the Tatra National Park – the population dynamics pattern remains constant

The Human Impact on Changes in the Forest Range of the Silesian Beskids (Western Carpathians)

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