Hotter drought increases population levels and accelerates phenology of the European spruce bark beetle Ips typographus

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60460709%3A41320%2F25%3A102975" target="_blank" >RIV/60460709:41320/25:102975 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S0378112725001239?pes=vor&utm_source=clarivate&getft_integrator=clarivate" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0378112725001239?pes=vor&utm_source=clarivate&getft_integrator=clarivate</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.foreco.2025.122615" target="_blank" >10.1016/j.foreco.2025.122615</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Hotter drought increases population levels and accelerates phenology of the European spruce bark beetle Ips typographus

Popis výsledku v původním jazyce

Bark beetle-induced tree mortality has increased strongly in Europe in recent years. Bark beetle populations are highly sensitive to temperature, and drought weakens tree defenses against beetle attacks. Yet, the compound effects of drought and heat (termed hotter drought) remain poorly quantified, even though climate change increases their joint occurrence. Here, we analyzed data from a regional-scale network of pheromone-baited Ips typographus traps (158 traps across 7 Mha in southeast Germany, with 67.5 & sdot;million beetles caught between 2015 and 2021), contrasting the unprecedented hotter drought period of 2018-2020 with non-drought years. Our objectives were (i) to assess the effect of hotter drought on bark beetle population dynamics, (ii) to quantify changes in spatial patterns during hotter drought, and (iii) to investigate how well trap data can explain observed tree mortality. Bark beetle population levels were strongly driven by temperature and drought, with an annual increase of approximately 2000 beetles per trap per degrees C under drought conditions (SPEI = -1). Furthermore, critical phenological thresholds were reached 7 days earlier for aggregation and 4 days earlier for peak swarming timing per degrees C increase in temperature. In drought years, I. typographus population levels were autocorrelated across hundreds of kilometers. Trap data explained between 37 % and 49 % of observed bark beetle mortality, highlighting that pheromone trap networks are a useful tool for monitoring and managing forest risk. We conclude that hotter drought intensifies and extends mass outbreaks of the European spruce bark beetle, suggesting the emergence of novel patterns of disturbance.

Název v anglickém jazyce

Hotter drought increases population levels and accelerates phenology of the European spruce bark beetle Ips typographus

Popis výsledku anglicky

Bark beetle-induced tree mortality has increased strongly in Europe in recent years. Bark beetle populations are highly sensitive to temperature, and drought weakens tree defenses against beetle attacks. Yet, the compound effects of drought and heat (termed hotter drought) remain poorly quantified, even though climate change increases their joint occurrence. Here, we analyzed data from a regional-scale network of pheromone-baited Ips typographus traps (158 traps across 7 Mha in southeast Germany, with 67.5 & sdot;million beetles caught between 2015 and 2021), contrasting the unprecedented hotter drought period of 2018-2020 with non-drought years. Our objectives were (i) to assess the effect of hotter drought on bark beetle population dynamics, (ii) to quantify changes in spatial patterns during hotter drought, and (iii) to investigate how well trap data can explain observed tree mortality. Bark beetle population levels were strongly driven by temperature and drought, with an annual increase of approximately 2000 beetles per trap per degrees C under drought conditions (SPEI = -1). Furthermore, critical phenological thresholds were reached 7 days earlier for aggregation and 4 days earlier for peak swarming timing per degrees C increase in temperature. In drought years, I. typographus population levels were autocorrelated across hundreds of kilometers. Trap data explained between 37 % and 49 % of observed bark beetle mortality, highlighting that pheromone trap networks are a useful tool for monitoring and managing forest risk. We conclude that hotter drought intensifies and extends mass outbreaks of the European spruce bark beetle, suggesting the emergence of novel patterns of disturbance.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

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OECD FORD obor

40102 - Forestry

Projekt

—

Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2025

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Forest Ecology and Management

ISSN

0378-1127

e-ISSN

0378-1127

Svazek periodika

585

Číslo periodika v rámci svazku

2025

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

11

Strana od-do

1-11

Kód UT WoS článku

001446904000001

EID výsledku v databázi Scopus

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