PolliNation Podcast

Andony Melathopoulos

PolliNation is a podcast from Oregon State University Extension Service that tells the stories of researchers, land managers and concerned citizens who are making bold strides to improve the health of pollinators.

  1. 12 oct

    307 - Are Bees Losing Their Way? How Odor Pollution Disrupts Pollination | PolliNation

    Dr. Jordanna Sprayberry, Associate Professor & Director of Undergraduate Biology at Stony Brook University, joins the Pollination podcast to explain how agrochemical odors interfere with bees' ability to find flowers — and why that matters for entire ecosystems. Dr. Sprayberry is a pollination neuroethologist who studies how nervous systems process sensory information and how that processing drives foraging behavior. In this conversation, she breaks down her lab's groundbreaking "odor geometry" system for measuring olfactory pollution thresholds, shares findings from wind tunnel experiments on how bees search at different distances, and makes the case for replacing lawns with native plants — even before the science is fully settled. KEY FINDINGS DISCUSSED: Fungicide odor alone (without ingestion) changes bee foraging behavior Bees searching far from a flower patch weight color and odor equally; bees searching nearby rely primarily on color Beyond 30° of odor "distance" (measured via Euclidean odor geometry), bees no longer recognize floral scents as food Odor pollution may be most impactful for bees searching for new flower patches, not those foraging in established meadows Bumblebee colonies that fall below a resource threshold cannot produce queens, potentially crashing local populations Atmospheric pollutants (ozone, nitrous oxides) degrade floral odor blends as they travel, reducing perceptual range LINKS: Dr. Sprayberry's Lab (SPRAY Lab): https://sites.google.com/stonybrook.edu/spraylab/home Stony Brook University Department of Biology: https://www.stonybrook.edu/biology

  2. 6 jul

    304 - Millions of Solitary Bees in a Cemetery: Andrena regularis Aggregations and Parasite Dynamics | PolliNation

    Dr. Bryan Danforth of Cornell University joins the podcast to discuss a new Apidology study led by Steven Hodge on emergence dynamics and host–parasite associations in a massive cemetery nesting aggregation of the solitary bee Andrena regularis. Using emergence traps checked daily for 40 days at East Lawn Cemetery near Cornell, the team estimated a mean population size of 5.5 million emerging bees within a compact area and documented synchronized host emergence with more gradual, delayed emergence by Nomada cuckoo bees, plus low-frequency associates including a meloid beetle and a conopid fly. Danforth explains A. regularis biology and its exceptional importance and effectiveness as an apple pollinator, highlights evidence for greater female investment as a potential sign of abundant resources, and argues cemeteries and other nest sites may be overlooked conservation assets, supported by Cornell's Ground-Nesting Bees iNaturalist initiative. Danforth Lab: https://www.danforthlab.entomology.cornell.edu GNBees: https://www.gnbee.org Hoge, S.T., Kueneman, J.G., Fordyce, R., Dobler, C., Odanaka, K. and Danforth, B.N., 2026. Emergence dynamics and host-parasite associations in a large aggregation of Andrena regularis (Hymenoptera: Apoidea: Andrenidae). Apidologie, 57(2), p.29. https://link.springer.com/article/10.1007/s13592-026-01256-6?cjdata=MXxZfDB8WXww&utm_medium=affiliate&utm_source=commission_junction&utm_campaign=CONR_BOOKS_ECOM_GL_PBOK_06YUE_GL_ALWYS_DEEPLINK&utm_content=textlink&utm_term=PID100052570&CJEVENT=684ba1913cbf11f182b202450a18b8fc 00:00 Bee Numbers In Perspective 00:53 Solitary Bee Megasites 01:14 Meet Dr Brian Danforth 05:13 Cemetery Nesting Twist 06:14 Bee Biology And Pollination 08:54 Why Cemeteries Work 12:27 Biodiversity And History 14:00 Emergence Traps Method 16:34 Parasites And Phenology 21:07 Sex Ratios And Health 24:04 Millions Of Bees Estimated 26:44 Conservation and iNaturalist  28:38 Can We Build Bee Beds

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PolliNation is a podcast from Oregon State University Extension Service that tells the stories of researchers, land managers and concerned citizens who are making bold strides to improve the health of pollinators.

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