Date of Award

Spring 4-28-2021

Semester of Degree


Document Type

Open Access Thesis

Degree Name

M.S. in Environmental and Forest Biology


Environmental and Forest Biology

Major Professor

Michael Schummer


Michael Schummer


Melissa Fierke

Steering Committee Member

Donald Leopold


Wetlands are restored and managed primarily to benefit waterfowl with little information about how these activities affect other taxa like pollinators. This study was among the first to survey pollinators in managed wetlands, and characterized the availability of floral resources, as well as bee and syrphid fly assemblages, among wetlands in central New York experiencing hydrological management. Over 80 bee species and 38 syrphid species were collected in 2019 and 2020, totaling 10,170 individuals. Bee and entomophilous plant assemblages did not differ in richness, and differed only weakly in composition, among treatments. Open water, invasive graminoids, and monotypic cattail negatively predicted bee richness and entomophilous plants. Treatments provided the greatest diversity of floral resources in late summer, and were exploited opportunistically by many generalists and some rare or specialized species. Wetland managers should strive for landscape heterogeneity through a mix of drawdowns, and control invasive graminoids to improve habitat quality.