Affiliation:
1. Department of Plant Science and Landscape Architecture, University of Connecticut, 1376 Storrs Rd., Storrs, CT 06269, USA
Abstract
Introduced willows have mostly been employed as a renewable feedstock for bioenergy in the northeastern USA. The question of whether introduced willows provide the same biodiversity value and attractiveness as native willows has not yet been explored. The objective of this study was to compare the attractiveness of native and introduced willows to different subfamilies of bees. The common garden experiment planted at Storrs, CT, USA, included three native (S. eriocephala, S. sericea, S. lucida) and three introduced (S. ‘SX64’, S. ‘Onondaga’, S. ‘S365’) willows. Various willow taxa flowered at different times through spring, allowing pollinators to be collected over a 6-week period using colored bowl traps. As a result, 2430 bees were collected and identified to the subfamily level. Andreninae was the most prevalent pollinator visiting all taxa of willows, followed by Hylaeinae and Colletinae. There were no significant differences in the number of pollinators collected from either native or introduced taxa during the progressive willow flowering during mid-March–May of 2021 and 2022, suggesting their equal attractiveness to pollinators. Similarly, during the concurrent flowering of the two native and two introduced taxa, there were no significant differences in the number of pollinators associated with either group suggesting that when pollinators had foraging choices, they were similarly attracted to both native and introduced willows. The overall finding of this study suggested that plantings of either native or introduced willows to meet bioenergy goals offer similar benefits of floral resources for pollinators.
Funder
U.S. Department of Agriculture National Institute of Food and Agriculture
Reference52 articles.
1. Economic comparative advantage of willow biomass in the Northeast USA;Langholtz;Biofuels Bioprod. Biorefin.,2019
2. The characterization of willow (Salix L.) varieties for use in ecological engineering applications: Co-ordination of structure, function, and autecology;Kuzovkina;Ecol. Eng.,2009
3. Zumpf, C., Quinn, J., Cacho, J., Grasse, N., Negri, M.C., and Lee, D. (2021). Invertebrate and plant community diversity of an Illinois corn–soybean field with integrated shrub willow bioenergy buffers. Sustainability, 13.
4. Optimized utilization of Salix—Perspectives for the genetic improvement toward sustainable biofuel value chains;Dufour;GCB Bioenergy,2022
5. SRC-willow (Salix viminalis) as a resource for flower-visiting insects;Reddersen;Biomass Bioenergy,2001