Color of Pan Trap Influences Sampling of Bees in Livestock Pasture Ecosystem
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 ecosyst...
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MDPI AG
2021-05-01
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| Series: | Biology |
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| Online Access: | https://www.mdpi.com/2079-7737/10/5/445 |
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| author | Roshani S. Acharya Timothy Leslie Emily Fitting Joan Burke Kelly Loftin Neelendra K. Joshi |
| author_facet | Roshani S. Acharya Timothy Leslie Emily Fitting Joan Burke Kelly Loftin Neelendra K. Joshi |
| author_sort | Roshani S. Acharya |
| collection | DOAJ |
| description | 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 <i>Lasioglossum imitatum</i> (42.2%), <i>Augochlorella aurata</i> (8.3%), <i>L. subviridatum</i> (6.8), <i>Agapostemon texanus</i> (6.4), and <i>L. birkmani</i> (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. |
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| last_indexed | 2024-03-10T11:16:13Z |
| publishDate | 2021-05-01 |
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| series | Biology |
| spelling | doaj.art-77d23b59821f427baa513c1f34b8fedb2023-11-21T20:23:11ZengMDPI AGBiology2079-77372021-05-0110544510.3390/biology10050445Color of Pan Trap Influences Sampling of Bees in Livestock Pasture EcosystemRoshani S. Acharya0Timothy Leslie1Emily Fitting2Joan Burke3Kelly Loftin4Neelendra K. Joshi5Department of Entomology and Plant Pathology, 217 Plant Sciences Bldg., University of Arkansas, Fayetteville, AR 72701, USADepartment of Biology, Long Island University, 1 University Plaza, Brooklyn, NY 11201, USADepartment of Entomology and Plant Pathology, 217 Plant Sciences Bldg., University of Arkansas, Fayetteville, AR 72701, USAUSDA-Agricultural Research Service, Booneville, AR 72927, USADepartment of Entomology and Plant Pathology, 217 Plant Sciences Bldg., University of Arkansas, Fayetteville, AR 72701, USADepartment of Entomology and Plant Pathology, 217 Plant Sciences Bldg., University of Arkansas, Fayetteville, AR 72701, USAThe 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 <i>Lasioglossum imitatum</i> (42.2%), <i>Augochlorella aurata</i> (8.3%), <i>L. subviridatum</i> (6.8), <i>Agapostemon texanus</i> (6.4), and <i>L. birkmani</i> (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.https://www.mdpi.com/2079-7737/10/5/445pollinatorspan trapspasture ecosystembeesbee visionsampling method |
| spellingShingle | Roshani S. Acharya Timothy Leslie Emily Fitting Joan Burke Kelly Loftin Neelendra K. Joshi Color of Pan Trap Influences Sampling of Bees in Livestock Pasture Ecosystem Biology pollinators pan traps pasture ecosystem bees bee vision sampling method |
| title | Color of Pan Trap Influences Sampling of Bees in Livestock Pasture Ecosystem |
| title_full | Color of Pan Trap Influences Sampling of Bees in Livestock Pasture Ecosystem |
| title_fullStr | Color of Pan Trap Influences Sampling of Bees in Livestock Pasture Ecosystem |
| title_full_unstemmed | Color of Pan Trap Influences Sampling of Bees in Livestock Pasture Ecosystem |
| title_short | Color of Pan Trap Influences Sampling of Bees in Livestock Pasture Ecosystem |
| title_sort | color of pan trap influences sampling of bees in livestock pasture ecosystem |
| topic | pollinators pan traps pasture ecosystem bees bee vision sampling method |
| url | https://www.mdpi.com/2079-7737/10/5/445 |
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