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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

100%

Grodzki W., Gasienica Fronek W.

Folia Forestalia Polonica. Series A . Forestry

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2019

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tom 61

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nr 3

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Występowanie kornika drukarza Ips typographus (L.) (Coleoptera, Curculionidae, Scolytinae) po wiatrołomie z 2013 roku w Dolinie Kościeliskiej w Tatrzańskim Parku Narodowym

100%

Grodzki W., Gasienica Fronek W.

Leśne Prace Badawcze

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2017

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tom 78

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nr 2

At the end of 2013, Norway spruce stands in the area of the Tatra National Park were severely damaged by strong storms especially in the Kościeliska Valley region. In the following spring of 2014, a survey recording the occurrence of the spruce bark beetle Ips typographus (Coleoptera, Curculionidae, Scolytinae) was initiated in order to describe the dynamics of beetle reproduction in relation to protection measures executed in wind-damaged stands. Ten research plots with 20 trees each were established in a so-called active protection zone, where the broken and fallen trees had been processed and removed in 2014, and in a passive protection zone, where no actions were taken, and the dynamics of Norway spruce mortality due to bark beetle infestation including quantitative parameters (infestation density, sex ratio of beetle populations) were examined. The entomological analyses were performed on 25×25 cm large bark samples taken from four (active zone) or two (passive zone) tree sections. In the first year of the survey, no infested standing trees were recorded on the plots and the colonisation of fallen and broken trees was very weak. In the second year (2015), infestations appeared in larger numbers on the plots with passive compared to active protection but the infestation density was 0.89 mating chambers per 1 dm2 regardless of the protection status. In the third year (2016), most of the remaining living spruces had been infested with a mean density of 0.82 m.ch. per 1 dm2. In 2015, the proportion of females in the beetle population was 65.8% being higher in the active (68.4%) than the passive (64.0%) protection zone, while in 2016 the proportion was 63.5% and in this case slightly higher in the passive protection zone (63.9% as compared to 63.2%). These results are in accordance with patterns observed in wind-damaged Norway spruce stands of other areas in Poland and Europe and demonstrate the usefulness of forest management procedures in mitigating I. typographus outbreaks.

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Wpływ postępowania ochronnego na występowanie kornika drukarza Ips typographus (L.) w Dolinie Kościeliskiej w Tatrzańskim Parku Narodowym

100%

Grodzki W., Gasienica Fronek W.

Sylwan

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2018

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tom 162

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nr 08

In the end of 2013 the Norway spruce stands in the Kościelska Valley in the Tatra National Park (S Poland) were severely damaged by the wind. In the next year about 22,000 m³ of timber from broken and fallen trees was processed and removed from the active protection zone, whilst in the strict protection zone those trees were left. In 2014, when the presented survey started, the infestation of lying and surrounding standing trees was very low, but starting from 2015 an intensive bark beetle Ips typographus outbreak affected the survived stands. No−intervention strategy was implemented by the national park in both zones, regardless their formal status at that time as well. In 2015 a set of 10 observation plots (200 trees in total) was established in both active and passive (strict) protection zones (5 plots in each zone). In 2017 a new set of 12 plots (240 trees in total) was installed (6 plots in each zone). On each plot the breast height diameter of all trees was measured and the relative mortality of trees (share of attacked spruces) was recorded each year. The infestation density and sex ratio were defined on the 25×25 cm bark samples taken from 138 trees in 2 trunk sections located 1.5−2.0 above the ground and in the midway between tree and crown bases. The bark beetle attack on living spruces in 2015 differed between the active and strict protection zones. The relative tree mortality was lower in active than in passive protection zone (20 and 39% respectively), but later it gradually came to be similar in both parts of the area (73.3 and 77.5%, respectively in 2017). In the initial outbreak phase, thinner (weaker) trees were attacked, and in the following years – stronger ones, although in the active protection zone the opposite pattern occurred initially. The attack density decreased in subsequent years, being higher in active protection zone, with gradually decreasing difference between zones. Thicker trees were attacked with lower intensity. The share of females, higher in active protection zone (68.2 vs. 63.9%), gradually decreased to (57.9 vs. 51.2%). The initial decrease of bark beetle attack intensity in the active protection zone gradually disappeared after the no−intervention strategy was applied. The resulting extended bark beetle infestation and its increasing intensity in both parts of the area, demonstrate the appropriateness and effectiveness of active protection measures applied in 2014.

Ograniczanie wyników

1 Folia Forestalia Polonica. Series A . Forestry

1 Leśne Prace Badawcze

1 Sylwan

3 Gasienica Fronek W.

3 Grodzki W.

1 2019

1 2018

1 2017

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

Występowanie kornika drukarza Ips typographus (L.) (Coleoptera, Curculionidae, Scolytinae) po wiatrołomie z 2013 roku w Dolinie Kościeliskiej w Tatrzańskim Parku Narodowym

Wpływ postępowania ochronnego na występowanie kornika drukarza Ips typographus (L.) w Dolinie Kościeliskiej w Tatrzańskim Parku Narodowym