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Use of botanical gardens as arks for conserving pollinators and plant-pollinator interactions: A case study from the US Northern Great Plains

Vilella-Arnizaut, I. B.; Fenster, C. B.

2021-02-27 ecology
10.1101/2021.02.26.433109 bioRxiv
Show abstract

Botanical gardens have contributed to plant conservation through the maintenance of both living and preserved plant specimens for decades. However, there is still a large gap in the literature with regards to understanding the potential conservation value botanical gardens could provide for local pollinators. We investigated how plant-pollinator community structure and diversity may differ between botanical gardens and native habitats by sampling and comparing between two environments: a restored native grassland patch within a local botanical garden and fifteen native, remnant temperate grassland sites in the Northern Great Plains. We found pollinator diversity within the restored native grassland patch was greater than 55% of total remnant temperate grassland transects throughout the entire flowering season, while plant diversity and network community metrics between the two environments remained similar throughout, except that remnant prairies have more links (higher connectance) with pollinators than the garden patch. Overall, our findings demonstrate the promising role restored native grassland patches in botanical gardens could play as reservoirs for local pollinator communities by supporting plant-pollinator interactions comparable to those found in native habitat remnants in the same region.

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