Insects in the tropics usually have continuous generations throughout the year. We reanalyzed published data of wood-boring beetles, belonging to three taxonomic groups (Bostrichidae; Curculionidae: Scolytinae, Platypodinae), that were captured by ethanol-baited traps continuously set for three years and collected every two weeks in the lowland montane forest in northern Thailand. Because trap captures seemed to have 1-yr cycle, we hypothesized that 1-yr cycle of climate had caused 1-yr cycle in the trap captures. To test this hypothesis, cycles of both total trap captures (TTC) and of each species, synchrony in time-series trap captures, and causality of temperature and rainfall to the TTC were determined. Eighty-nine species were captured over the three years. Among 55 species (>2 individuals), 30 species showed the greatest peak of spectral density at 1-yr, but only three were significant. Some species had (a) cycle(s) shorter than one year. However, 20 species making up 69.7% of TTC and 38 species making up 91.1% of TTC showed significant synchrony with TTC diagnosed by the Phillips-Ouliaris cointegration test and Pearson’s correlation function, respectively. Temperature, rainfall, and season (solar elevation angle) showed significant causalities, the effect of season being the strongest. Both temperature and rainfall positively influenced TTC with lags. These results indicate that seasonality in temperature and rainfall caused a 1-yr cycle in flying beetles of a majority of the more abundant species, and synchrony among species, which resulted in the 1-yr cycle of TTC. The revolution and tilt of the earth was a likely driving force.

热带地区的昆虫通常全年都有连续的世代。我们重新分析了无聊的甲虫的数据，它们属于三个分类组（Bostrichidae； Curculionidae：Scolytinae，Platypodinae），它们被乙醇诱集的诱集装置连续捕获了三年，并每两周收集在北部的低地山区森林泰国。因为陷阱捕获似乎具有1年周期，所以我们假设气候的1年周期导致了陷阱捕获1年周期。为了检验该假设，确定了总捕集捕获（TTC）和每个物种的周期，时间序列捕集捕获的同步性以及温度和降雨对TTC的因果关系。在三年中捕获了89种。在55种（> 2个个体）中，30种物种在1年时显示出最大的光谱密度峰值，但只有3种是显着的。一些物种的周期短于一年。然而，分别由Phillips-Ouliaris协整检验和Pearson相关函数诊断出的TTC具有显着的同步性，其中20种占TTC的69.7％，38种占TTC的显着同步。温度，降雨和季节（太阳仰角）显示出明显的因果关系，季节的影响最大。温度和降雨都对TTC产生积极影响，并具有滞后性。这些结果表明，温度和降雨的季节性导致大多数较丰富的物种的甲虫的飞行周期为1年，并且物种间也发生同步，从而导致TTC的周期为1年。地球的公转和倾斜是一种可能的驱动力。