Acharya Roshani S, Leslie Timothy, Fitting Emily, Burke Joan, Loftin Kelly, Joshi Neelendra K
Department of Entomology and Plant Pathology, 217 Plant Sciences Bldg., University of Arkansas, Fayetteville, AR 72701, USA.
Department of Biology, Long Island University, 1 University Plaza, Brooklyn, NY 11201, USA.
Biology (Basel). 2021 May 19;10(5):445. doi: 10.3390/biology10050445.
The decline in insect pollinators has increased the importance of accurately monitoring pollinator diversity and abundance over time. Sampling techniques include the use of passive insect traps such as pan traps, yet there is still discussion over their utility and effectiveness in different ecosystems. The objective was to examine four different colors of pan traps (blue, green, yellow, and purple) for their utility in sampling bees in native forages rotationally grazed by sheep and to compare the relative abundance, richness, similarity, and community assemblage patterns among the four trap colors. Most bees were from the Halictidae family (89%). The most abundant species were (42.2%), (8.3%), (6.8), (6.4), and (4.1%). Blue color traps exhibited the highest rates of bee capture and species accumulation. Purple and yellow colored traps were moderately effective in capturing bees, while the green color pan traps were least effective. Similarly, observed and extrapolated species richness was highest in blue trap, followed by purple, yellow, and green. Notably, the blue trap captured the highest number of unique species, followed by purple, yellow and green traps. Considering the total number of insects collected (including bees and other insects), yellow and green traps captured a significantly higher number of insects than other colored traps. The light reflectance from blue, purple, green and yellow pan traps had peaks at ~450, 400, 550, and 600 nm, respectively. Since different insects respond to different light intensities, wavelengths, and reflectivity, these results could be used to guide future trapping protocols targeting certain insect groups in livestock pasture and similar ecosystems.
传粉昆虫数量的减少增加了随时间准确监测传粉者多样性和丰度的重要性。采样技术包括使用被动昆虫诱捕器，如盘式诱捕器，但对于它们在不同生态系统中的效用和有效性仍存在争议。目的是研究四种不同颜色的盘式诱捕器（蓝色、绿色、黄色和紫色）在绵羊轮牧的天然草料中对蜜蜂采样的效用，并比较四种诱捕器颜色之间的相对丰度、丰富度、相似性和群落组合模式。大多数蜜蜂来自隧蜂科（89%）。最丰富的物种是[具体物种1]（42.2%）、[具体物种2]（8.3%）、[具体物种3]（6.8%）、[具体物种4]（6.4%）和[具体物种5]（4.1%）。蓝色诱捕器捕获蜜蜂的比率和物种积累率最高。紫色和黄色诱捕器在捕获蜜蜂方面效果中等，而绿色盘式诱捕器效果最差。同样，观察到的和外推的物种丰富度在蓝色诱捕器中最高，其次是紫色、黄色和绿色。值得注意的是，蓝色诱捕器捕获的独特物种数量最多，其次是紫色、黄色和绿色诱捕器。考虑到收集到的昆虫总数（包括蜜蜂和其他昆虫），黄色和绿色诱捕器捕获的昆虫数量明显高于其他颜色的诱捕器。蓝色、紫色、绿色和黄色盘式诱捕器的光反射率峰值分别在~450、400、550和600纳米处。由于不同昆虫对不同的光强度、波长和反射率有不同反应，这些结果可用于指导未来针对畜牧场和类似生态系统中某些昆虫群体的诱捕方案。
