Abstract
Various methods exist for collecting pollinating insects; however, colored bowl traps, vane traps, and sweep netting are among the most commonly used approaches, and may yield different estimates of insect abundance and taxa diversity depending on habitat type. Electric transmission rights-of-ways (ROWs) are found throughout the United States and provide early successional habitat which may provide an abundance of floral and nesting resources for many insect pollinators. Despite the potential for harboring pollinating insects, few researchers have focused on ROWs as important pollinator habitat. We surveyed pollinating insects (bees, wasps, flies, and lepidopterans) within ROWs and the surrounding habitat in central Alabama during spring and summer of 2018 using colored bowl traps (blue, yellow, and white), blue vane traps, and targeted sweep netting of insects on flowering plants. Overall, each collection method collected several bee genera and other pollinators that were not collected with the other methods. Blue vane traps collected more bee taxa and overall pollinating insect diversity compared to colored bowl traps and sweep netting. Sweep netting flowering plants collected the fewest pollinating insects but did document some genera that colored bowl traps and vane traps did not. Our data support the use of multiple collecting methods to document pollinator insect diversity and abundance.
Implications for insect conservation
This study suggests that accurately assessing insect pollinator abundance and diversity should not depend solely on one type of collecting method due to potential collection biases. Alternatively, if specific pollinator taxa are sought, utilizing certain collecting methods over others may enhance the probability of collection.
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Acknowledgements
We thank Alexandra Tsalickis, Hannah Langlois, Kyle Shoulders, and Wes Stone for field and lab assistance.
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This work was supported by Alabama Power, Southern Company, and the Electric Power Research Institute.
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Campbell, J.W., Abbate, A., West, N.M. et al. Comparing three collection methods for pollinating insects within electric transmission rights-of-ways. J Insect Conserv 27, 377–387 (2023). https://doi.org/10.1007/s10841-023-00460-4
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DOI: https://doi.org/10.1007/s10841-023-00460-4