Data for: Climatic and management-related drivers of endemic European spruce bark beetle populations in boreal forests

Climate change is already reducing carbon sequestration in Central European forests dramatically through extensive droughts and bark beetle outbreaks. Further warming may threaten the enormous carbon reservoirs in the boreal forests in northern Europe, unless disturbance risks can be reduced by adaptive forest management. The European spruce bark beetle (Ips typographus) is a major natural disturbance agent in spruce-dominated forests and can overwhelm the defences of healthy trees through pheromone-coordinated mass-attacks. We used an extensive dataset of bark beetle trap counts to quantify how climatic and management-related factors influence bark beetle population sizes in boreal forests. Trap data was collected during a period without outbreaks and can thus identify mechanisms that drive populations towards outbreak thresholds. The most significant predictors of bark beetle population size were volume of mature spruce, extent of newly exposed clearcut edges, temperature, and soil mo..., , , # Dataset: Climatic and management-related drivers of endemic European spruce bark beetle populations in boreal forests Authors note: We advice those wanting to utilize this data, first contact **Summary of experimental efforts underlying this dataset** The data include counts from Ipslure® pheromone (methylbutenol, cis-verbenol, and ipsdienol) baited funnel traps, that attract the European spruce bark beetle (Ips typographus). The trapping effort was carried out in spruce dominated areas of southern Norway in the time period 2004-2021 (N = 1 731). **Description of file structure and contents** The csv file contains trap counts and several covariates. Some covariates (indicated below) are from three years before the corresponding trapping data, which is due to a time lag in the effect of some variables on local beetle populations. year - year of trapping north - trapping location latitude (decimal degrees) east - trapping location longitude (decimal degrees) masl - trapping ...气候变化已通过大规模干旱与树皮甲虫暴发事件，大幅降低中欧森林的碳固存能力。若进一步升温，北欧北方针叶林的巨型碳库或将面临威胁，除非通过适应性森林管理降低干扰风险。欧洲云杉树皮甲虫（Ips typographus）是云杉主导森林的主要自然干扰因子，可通过信息素协调的集群攻击击溃健康树木的防御体系。 本研究利用一套覆盖范围广泛的树皮甲虫诱捕计数数据集，量化气候与管理相关因子对北欧北方针叶林内树皮甲虫种群规模的影响。诱捕数据采集于无树皮甲虫暴发的时段，因此可识别驱动种群达到暴发阈值的内在机制。 影响树皮甲虫种群规模的最显著预测因子包括成熟云杉蓄积量、新裸露皆伐边缘范围、气温及土壤湿度（原文此处未完整）…… # 数据集：北方针叶林内欧洲云杉树皮甲虫土著种群的气候与管理驱动因子 ## 作者说明 凡欲使用本数据集者，请先行联系 ## 本数据集支撑的试验工作概述 数据集包含采用Ipslure®信息素（包括3-甲基-2-丁烯-1-醇、顺式马鞭草烯醇及ipsdienol）引诱的漏斗诱捕器捕获计数，此类诱捕器可针对性引诱欧洲云杉树皮甲虫（Ips typographus）。诱捕作业于2004年至2021年间在挪威南部云杉主导林区开展，有效样本量N=1731。 ## 文件结构与内容说明 本CSV文件包含诱捕计数及多项协变量。部分协变量（下文标注）取自对应诱捕作业前三年的数据，原因在于部分变量对当地甲虫种群的影响存在时间滞后效应。 - year：诱捕作业年份 - north：诱捕点位纬度（十进制度） - east：诱捕点位经度（十进制度） - masl：诱捕点位海拔（原文此处未完整）