{ "152348-21913575": { "datetime_modified":"20260917T113653", "datetime_start":"20260922T120000", "datetime_end":"20260922T130000", "has_end_time":1, "date_start":"2026-09-22", "date_end":"2026-09-22", "time_start":"12:00:00", "time_end":"13:00:00", "time_zone":"America\/Detroit", "event_title":"EEB Tuesday Seminar Series - Speakers: Abbey Soule & Allie Fletcher", "occurrence_title":"", "combined_title":"EEB Tuesday Seminar Series - Speakers: Abbey Soule & Allie Fletcher", "event_subtitle":"", "event_type":"Workshop \/ Seminar", "event_type_id":"21", "description":"Speaker 1: Abbey Soule from Weber lab\n\nTitle: Scaredy cat(erpillars): Bottom-up vs. top-down drivers of defense sequestration in Estigmene acrea\n\nDescription: Sequestration of plant chemicals is well-established as a defense mechanism used by herbivorous insects against their predators, yet the drivers of variation in sequestered defenses remain poorly understood. Using the salt marsh caterpillar, Estigmene acrea, which sequesters pyrrolizidine alkaloids (PAs) from host plants for defense against predators, we performed two experiments to assess the influence of (1) chemical diversity in caterpillar diet and (2) diversity of predator non-consumptive effects (NCEs) on sequestered defenses in adult moths. In this presentation, I will discuss the differences in sequestered defenses resulting from our experiments, analyzed using targeted ultra high performance liquid chromatography-mass spectrometry (UPLC-MS) and downstream calculation of PA abundance using methods I have developed in my dissertation work. We found that dietary chemical diversity did not impact PA sequestration, but that predator NCE diversity significantly increased sequestered PA abundance through a selective effect imposed by particularly 'scary' predators. Together, our combination of experimental treatments alongside analytical chemistry allowed us to investigate top-down and bottom-up trophic forces on sequestration patterns that have not previously been explored.\n\nSpeaker 2: Allie Fletcher from Weber lab\n\nTitle: Hear Today, Gone Tomorrow: Ear Mites in Noctuoid Moths\n\nDescription: Moths and butterflies serve as hosts for a variety of parasites, noteworthy among which are the Dicrocheles ear mites of noctuoid moths which complete their life cycle within the moths' thoracic ears. Throughout the mid-20th century, Asher Treat\u2019s work provided unprecedented insight into these mites' natural history and their prevalence in moths in Western Massachusetts. Building on this foundation, we examined a broader geographic and taxonomic scope in order to approach questions about the co-evolution of these mites and their hosts, including defensive adaptations in the moths. Using five large entomological collections, we examined over 17,700 moth specimens for ear mites and nearly doubled the known list of recorded host species: we add 76 new host species records of the single-ear mites D. phalaenodectes, D. eothenes, D. hippeoides, and D. pelates, of which 40 represent the Leucaniini and 30 in the most frequently infested genus Leucania; and 32 new hosts of the double-ear mite D. scedastes (10 Leucaniini, 4 Leucania). Further, in several hundred Leucania linita, we quantified wing and body wear and tested its relationship with mite presence. Mite infestation was strongly associated with specimen condition: the most worn individuals were more than four times as likely to harbor mites as pristine individuals.", "occurrence_notes":null, "guid":"152348-21913575@events.umich.edu", "permalink":"http:\/\/events.umich.edu\/event\/152348", "building_id":"1005169", "building_name":"Biological Sciences Building", "campus_maps_id":"631", "room":"1010", "location_name":"Biological Sciences Building", "has_livestream":0, "cost":"", "tags":["Ecology And Evolutionary Biology","Workshop","Talk","seminar","scientists","Science","Research","Graduate Students","evolution","environmental","Environment","eeb","ecosystem","Ecology & Biology","evolutionary biology"], "website":"", "sponsors":[ { "group_name":"EEB Tuesday Lunch Seminars", "group_id":"3823", "website":"" } ], "image_url":"https:\/\/events.umich.edu\/media\/attachments\/2026\/09\/event_152348_original-1.png", "styled_images":{ "event_thumb":"https:\/\/events.umich.edu\/media\/cache\/resolve\/event_thumb\/media\/attachments\/2026\/09\/event_152348_original-1.png", "event_large":"https:\/\/events.umich.edu\/media\/cache\/event_large\/media\/attachments\/2026\/09\/event_152348_original-1.png", "event_large_2x":"https:\/\/events.umich.edu\/media\/cache\/event_large_2x\/media\/attachments\/2026\/09\/event_152348_original-1.png", "event_large_lightbox":"https:\/\/events.umich.edu\/media\/cache\/event_large_lightbox\/media\/attachments\/2026\/09\/event_152348_original-1.png", "group_thumb":"https:\/\/events.umich.edu\/media\/cache\/resolve\/group_thumb\/media\/attachments\/2026\/09\/event_152348_original-1.png", "group_thumb_square":"https:\/\/events.umich.edu\/media\/cache\/resolve\/group_thumb_square\/media\/attachments\/2026\/09\/event_152348_original-1.png", "group_large":"https:\/\/events.umich.edu\/media\/cache\/resolve\/group_large\/media\/attachments\/2026\/09\/event_152348_original-1.png", "group_large_lightbox":"https:\/\/events.umich.edu\/media\/cache\/resolve\/group_large_lightbox\/media\/attachments\/2026\/09\/event_152348_original-1.png", "event_large_crop":"https:\/\/events.umich.edu\/media\/cache\/resolve\/event_large_crop\/media\/attachments\/2026\/09\/event_152348_original-1.png", "event_list":"https:\/\/events.umich.edu\/media\/cache\/resolve\/event_list\/media\/attachments\/2026\/09\/event_152348_original-1.png", "event_list_2x":"https:\/\/events.umich.edu\/media\/cache\/event_list_2x\/media\/attachments\/2026\/09\/event_152348_original-1.png", "event_grid":"https:\/\/events.umich.edu\/media\/cache\/event_grid\/media\/attachments\/2026\/09\/event_152348_original-1.png", "event_grid_2x":"https:\/\/events.umich.edu\/media\/cache\/resolve\/event_grid_2x\/media\/attachments\/2026\/09\/event_152348_original-1.png", "event_feature_large":"https:\/\/events.umich.edu\/media\/cache\/resolve\/event_feature_large\/media\/attachments\/2026\/09\/event_152348_original-1.png", "event_feature_thumb":"https:\/\/events.umich.edu\/media\/cache\/event_feature_thumb\/media\/attachments\/2026\/09\/event_152348_original-1.png" }, "occurrence_count":1, "first_occurrence":21913575 } , "152642-21914329": { "datetime_modified":"20260922T120602", "datetime_start":"20260929T120000", "datetime_end":"20260929T130000", "has_end_time":1, "date_start":"2026-09-29", "date_end":"2026-09-29", "time_start":"12:00:00", "time_end":"13:00:00", "time_zone":"America\/Detroit", "event_title":"EEB Tuesday Seminar Series - Phylogenomics of Psidium (Myrtaceae): What this approach tells us about the guava genus", "occurrence_title":"", "combined_title":"EEB Tuesday Seminar Series - Phylogenomics of Psidium (Myrtaceae): What this approach tells us about the guava genus: Lazaro Henrique Soares de Moraes Concei\u00e7\u00e3o Postdoc, Vasconcelos Lab", "event_subtitle":"Lazaro Henrique Soares de Moraes Concei\u00e7\u00e3o Postdoc, Vasconcelos Lab", "event_type":"Workshop \/ Seminar", "event_type_id":"21", "description":"Seminar Summary - In this seminar, I will present the findings from my PhD research on the guava genus, highlighting how my work clarifies relationships between species and its implications for future studies in the genus and also Neotropical Myrtaceae. I also plan to present a brief preview of the research I will be developing with the Vasconcelos lab.", "occurrence_notes":null, "guid":"152642-21914329@events.umich.edu", "permalink":"http:\/\/events.umich.edu\/event\/152642", "building_id":"1005169", "building_name":"Biological Sciences Building", "campus_maps_id":"631", "room":"1010", "location_name":"Biological Sciences Building", "has_livestream":0, "cost":"", "tags":["Workshop","Talk","seminar","scientists","Science","Research","evolutionary biology","environmental","Environment","eeb"], "website":"", "sponsors":[ { "group_name":"EEB Tuesday Lunch Seminars", "group_id":"3823", "website":"" } ], "image_url":"https:\/\/events.umich.edu\/media\/attachments\/2026\/09\/event_152642_original-1.png", "styled_images":{ "event_thumb":"https:\/\/events.umich.edu\/media\/cache\/resolve\/event_thumb\/media\/attachments\/2026\/09\/event_152642_original-1.png", "event_large":"https:\/\/events.umich.edu\/media\/cache\/event_large\/media\/attachments\/2026\/09\/event_152642_original-1.png", "event_large_2x":"https:\/\/events.umich.edu\/media\/cache\/resolve\/event_large_2x\/media\/attachments\/2026\/09\/event_152642_original-1.png", "event_large_lightbox":"https:\/\/events.umich.edu\/media\/cache\/event_large_lightbox\/media\/attachments\/2026\/09\/event_152642_original-1.png", "group_thumb":"https:\/\/events.umich.edu\/media\/cache\/resolve\/group_thumb\/media\/attachments\/2026\/09\/event_152642_original-1.png", "group_thumb_square":"https:\/\/events.umich.edu\/media\/cache\/resolve\/group_thumb_square\/media\/attachments\/2026\/09\/event_152642_original-1.png", "group_large":"https:\/\/events.umich.edu\/media\/cache\/resolve\/group_large\/media\/attachments\/2026\/09\/event_152642_original-1.png", "group_large_lightbox":"https:\/\/events.umich.edu\/media\/cache\/resolve\/group_large_lightbox\/media\/attachments\/2026\/09\/event_152642_original-1.png", "event_large_crop":"https:\/\/events.umich.edu\/media\/cache\/resolve\/event_large_crop\/media\/attachments\/2026\/09\/event_152642_original-1.png", "event_list":"https:\/\/events.umich.edu\/media\/cache\/resolve\/event_list\/media\/attachments\/2026\/09\/event_152642_original-1.png", "event_list_2x":"https:\/\/events.umich.edu\/media\/cache\/event_list_2x\/media\/attachments\/2026\/09\/event_152642_original-1.png", "event_grid":"https:\/\/events.umich.edu\/media\/cache\/event_grid\/media\/attachments\/2026\/09\/event_152642_original-1.png", "event_grid_2x":"https:\/\/events.umich.edu\/media\/cache\/resolve\/event_grid_2x\/media\/attachments\/2026\/09\/event_152642_original-1.png", "event_feature_large":"https:\/\/events.umich.edu\/media\/cache\/resolve\/event_feature_large\/media\/attachments\/2026\/09\/event_152642_original-1.png", "event_feature_thumb":"https:\/\/events.umich.edu\/media\/cache\/event_feature_thumb\/media\/attachments\/2026\/09\/event_152642_original-1.png" }, "occurrence_count":1, "first_occurrence":21914329 } }