Forest management practices and droughts affect the assemblages of carabid species, and these are the most important factors in terms of influencing short- and long-term population changes. During 2017 and 2018, the occurrences and seasonal dynamics of five carabid species (Carabus coriaceus, C. ulrichii, C. violaceus, C. nemoralis and C. scheidleri) in four oak hornbeam forest stands were evaluated using the method of pitfall trapping. The climate water balance values were cumulatively calculated here as cumulative water balance in monthly steps. The cumulative water balance was used to identify the onset and duration of drought. The number of Carabus species individuals was more than three times higher in 2018 than in 2017. Spring activity was influenced by temperature. The extremely warm April in 2018 accelerated spring population dynamics; however, low night temperatures in April in 2017 slowed the spring activity of nocturnal species. Drought negatively influenced population abundance, and the effect of a drought is likely to be expressed with a two-year delay. In our investigation, a drought in 2015 started in May and lasted eight months; however, the drought was not recorded in 2016, and 2016 was evaluated as a humid year. The meteorological conditions in the year influenced seasonal activity patterns and the timings of peaks of abundance for both spring breeding and autumn breeding Carabus species.

中文翻译：

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Carabus 种群对低地橡树角树林干旱的反应

森林管理实践和干旱影响了carabid 物种的组合，而这些是影响短期和长期种群变化的最重要因素。2017 年和 2018 年期间，采用陷阱诱捕法评估了 4 棵橡树鹅耳枥林分中 5 种甲壳类动物（Carabus coriaceus、C. ulrichii、C. violaceus、C. nemoralis 和 C. 气候水平衡值在这里累积计算为每月步长的累积水平衡。累积水平衡用于确定干旱的发生和持续时间。2018 年 Carabus 物种个体数量是 2017 年的三倍多。春季活动受温度影响。2018 年 4 月异常温暖，加速了春季人口动态；然而，2017 年 4 月的夜间低温减缓了夜间物种的春季活动。干旱对人口丰度产生了负面影响，干旱的影响可能会延迟两年表现出来。在我们的调查中，2015 年的干旱始于 5 月，持续了 8 个月；然而，2016年没有发生干旱，2016年被评为潮湿年。当年的气象条件影响了春季繁殖和秋季繁殖的 Carabus 物种的季节性活动模式和丰度峰值的时间。2015 年的干旱始于 5 月，持续了 8 个月；然而，2016年没有发生干旱，2016年被评为潮湿年。当年的气象条件影响了春季繁殖和秋季繁殖的 Carabus 物种的季节性活动模式和丰度峰值的时间。2015 年的干旱始于 5 月，持续了 8 个月；然而，2016年没有发生干旱，2016年被评为潮湿年。当年的气象条件影响了春季繁殖和秋季繁殖的 Carabus 物种的季节性活动模式和丰度峰值的时间。