Declining abundance of beetles, moths and caddisflies in the Netherlands
Declining abundance of beetles, moths and caddisflies in the Netherlands
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DOI：
10.1111/icad.12377
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发表时间：
2019-08-26
影响因子：
3.5
通讯作者：
Jongejans, Eelke
中科院分区：
文献类型：
--
作者：
Hallmann, Caspar A.;Zeegers, Theo;Jongejans, Eelke
最近，关于昆虫减少的报告引起了人们对全球昆虫状况的关注。在这里，我们提出了长期昆虫监测的结果，从两个地点在荷兰：自然发展区德Kaaistoep和自然保护区附近的威斯特。根据De Kaaistoep中被光吸引的昆虫的数据，在1997-2017年期间，大型蛾（大型鳞翅目），甲虫（鞘翅目）和石蛾（毛翅目）的平均个体数量下降，年下降率分别为3.8，5.0和9.2%。其他订单出现稳定[真正的错误（半翅目：异翅目和Auchelurorhyncha）和蜉蝣（蜉蝣目）]或有不确定性，在他们的趋势估计[草蛉（脉翅目）]。基于Wijster附近的48个陷阱陷阱，在1985-2016年期间，地面甲虫（鞘翅目：步甲科）的总数平均每年下降4.3%。然而，1995年以后下降的幅度似乎更大。对于大型蛾，个别物种的趋势的平均值是可比的，每年的总人数的趋势。然而，个别地面甲虫物种的趋势表明，丰富的物种比稀有的表现更差。当翻译成生物量估计，我们的计算表明，总生物量减少约61%的大型蛾作为一个群体，地面甲虫至少42%，外推超过27年。较重的地面甲虫和大型蛾没有下降更强烈的比较轻的物种，这表明重的物种并没有不成比例的生物量下降。我们的研究结果与最近报道的德国和其他地方昆虫生物量的趋势基本一致。
Recently, reports of insect declines prompted concerns with respect to the state of insects at a global level. Here, we present the results of longer-term insect monitoring from two locations in the Netherlands: nature development area De Kaaistoep and nature reserves near Wijster. Based on data from insects attracted to light in De Kaaistoep, macro-moths (macro-Lepidoptera), beetles (Coleoptera), and caddisflies (Trichoptera) have declined in the mean number of individuals counted per evening over the period of 1997-2017, with annual rates of decline of 3.8, 5.0 and 9.2%, respectively. Other orders appeared stable [true bugs (Hemiptera: Heteroptera and Auchenorrhyncha) and mayflies (Ephemeroptera)] or had uncertainty in their trend estimate [lacewings (Neuroptera)]. Based on 48 pitfall traps near Wijster, ground beetles (Coleoptera: Carabidae) showed a mean annual decline of 4.3% in total numbers over the period of 1985-2016. Nonetheless, declines appeared stronger after 1995. For macro-moths, the mean of the trends of individual species was comparable to the annual trend in total numbers. Trends of individual ground beetle species, however, suggest that abundant species performed worse than rare ones. When translated into biomass estimates, our calculations suggest a reduction in total biomass of approximately 61% for macro-moths as a group and at least 42% for ground beetles, by extrapolation over a period of 27 years. Heavier ground beetles and macro-moths did not decline more strongly than lighter species, suggesting that heavy species did not contribute disproportionately to biomass decline. Our results broadly echo recent reported trends in insect biomass in Germany and elsewhere.