Dole Stephanie A, Hulcr Jiri, Cognato Anthony I
Department of Entomology, California Academy of Sciences 55 Music Concourse Drive, San Francisco, CA 94118, USA Department of Entomology, California Academy of Sciences San Francisco United States of America.
School of Forest Research and Conservation, University of Florida 136 Newins-Ziegler Hall, Gainesville, FL 32611, USA University of Florida Gainesville United States of America.
Zookeys. 2021 Jun 16;1044:797-813. doi: 10.3897/zookeys.1044.57849. eCollection 2021.
Canopy fogging was used to sample the diversity of bark and ambrosia beetles (Coleoptera, Curculionidae, Scolytinae) at two western Amazonian rainforest sites in Ecuador. Sampling was conducted by Dr Terry Erwin and assistants from 1994-2006 and yielded 1158 samples containing 2500 scolytine specimens representing more than 400 morphospecies. Here, we analyze a subset of these data representing two ecological groups: true bark beetles (52 morphospecies) and ambrosia beetles (69 morphospecies). A high percentage of these taxa occurred as singletons and doubletons and their species accumulation curves did not reach an asymptote. Diversity estimates placed the total scolytine species richness for this taxon subset present at the two sites between 260 and 323 species. The α-diversity was remarkably high at each site, while the apparently high β-diversity was an artifact of undersampling, as shown by a Monte Carlo resampling analysis. This study demonstrates the utility of canopy fogging for the discovery of new scolytine taxa and for approximate diversity assessment, but a substantially greater sampling effort would be needed for conclusive alpha as well as beta diversity estimates.
在厄瓜多尔西部亚马逊雨林的两个地点，采用树冠喷雾法对树皮甲虫和食菌小蠹（鞘翅目，象甲科，小蠹亚科）的多样性进行采样。采样工作由特里·欧文博士及其助手于1994年至2006年开展，共获得1158个样本，包含2500个小蠹亚科标本，代表了400多个形态种。在此，我们分析这些数据的一个子集，该子集代表两个生态组：真正的树皮甲虫（52个形态种）和食菌小蠹（69个形态种）。这些分类单元中有很大比例以单种和双种形式出现，其物种积累曲线未达到渐近线。多样性估计表明，这两个地点该分类单元子集的小蠹亚科物种丰富度总数在260至323种之间。每个地点的α多样性都非常高，而明显较高的β多样性是采样不足造成的假象，蒙特卡罗重采样分析表明了这一点。本研究证明了树冠喷雾法在发现新的小蠹亚科分类单元和进行近似多样性评估方面的效用，但要得出确凿的α多样性和β多样性估计值，还需要进行大量得多的采样工作。
