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DTSTAMP:20260922T115050
DTSTART;TZID=America/Detroit:20261029T160000
DTEND;TZID=America/Detroit:20261029T170000
SUMMARY:Workshop / Seminar:EEB Thursday Seminar Series - Variation in life history strategies shapes evolution across the tree of fishes
DESCRIPTION:Seminar Summary - My research explores how ecology and life history strategies drive evolutionary processes and patterns in fishes. Life history strategies have direct links to fitness and vary dramatically among lineages\, and this variation can drive rates and patterns of trait evolution. In this talk I will highlight recent work demonstrating how a migratory life history strategy can influence trait evolution among populations and across clades spanning the fish tree of life. I will also present new research on macroevolution and diversification of lampreys\, an ancient lineage of jawless fishes with remarkably different life history strategies long thought to be linked to a novel speciation process.
UID:152638-21914326@events.umich.edu
URL:https://events.umich.edu/event/152638
CLASS:PUBLIC
STATUS:CONFIRMED
CATEGORIES:Ecology & Biology,Ecology,Workshop,Talk,seminar,Research,Lecture,evolutionary biology,environmental,Environment,eeb,Ecosystems,ecosystem,Ecology And Evolutionary Biology
LOCATION:Biological Sciences Building - 1060
CONTACT:
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BEGIN:VEVENT
DTSTAMP:20261022T150756
DTSTART;TZID=America/Detroit:20261103T120000
DTEND;TZID=America/Detroit:20261103T130000
SUMMARY:Workshop / Seminar:EEB Tuesday Seminar Series - Multi-environment fitness landscapes suggest effectively endless adaptation
DESCRIPTION:Seminar Summary - The number of beneficial substitutions (N) required for an adapting population to reach a fitness peak is a fundamental but unknown parameter of evolution. We find that N increases linearly with the number of variable sites in empirical fitness landscapes\, regardless of prior adaptation in another environment. Extrapolation suggests a minimal N of 10⁵ for typical prokaryotes and 10⁷ for mammals. In contrast\, in highly rugged shuffled landscapes\, N is markedly reduced\, while fitness gains also shrink. The relatively smooth empirical landscapes therefore enable greater fitness gains while lengthening adaptive walks\, rendering even local fitness peaks effectively unreachable because natural environments inevitably change. These results explain the persistence of fitness gains in long-term evolution experiments under constant environments and the widespread occurrence of beneficial mutations across species. They suggest that populations continuously adapt while remaining far from fitness optima\, challenging the long-held view that adaptation culminates at fitness peaks.
UID:153995-21917003@events.umich.edu
URL:https://events.umich.edu/event/153995
CLASS:PUBLIC
STATUS:CONFIRMED
CATEGORIES:Workshop,Talk,seminar,Science,Research,Professional Development
LOCATION:Biological Sciences Building - 3150
CONTACT:
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BEGIN:VEVENT
DTSTAMP:20261013T100028
DTSTART;TZID=America/Detroit:20261112T160000
DTEND;TZID=America/Detroit:20261112T170000
SUMMARY:Workshop / Seminar:EEB Thursday Seminar Series - Microbial responses to global change: from microscopic interactions to global patterns
DESCRIPTION:Seminar Summary - The Evans Lab studies microbial ecology and global change. We ask questions about how microbes respond to stressors like climate change\, particularly drought and floods\, and land use change like agricultural intensification. How microbes respond can affect a myriad of ecosystem services\, including soil fertility and crop growth\, and biogeochemical cycles. In this talk I highlight studies in our lab that span microscopic to global. First\, I'll talk about how (and whether) we can generalize microbial responses to a global change\, like drought. We used a network of rainout shelters to ask whether there were taxonomic or trait-based shifts in microbes under drought\, worldwide. We also extend this work to thinking about how microbes interact with plants to buffer plants under drought. Second\, I'll talk about a project investigating bacteria that fix nitrogen\, and how they interact with both the plant and other organisms in the soil\, like fungi. We hypothesized that bacterial-fungal interactions increased nitrogen fixation\, benefitting the plant\, and potentially reducing reliance on nitrogen fertilizers. I will also talk more generally about how these topics connect to global sustainability\, and relevant research at the Kellogg Biological Station Long Term Ecological Research Site.
UID:153608-21916095@events.umich.edu
URL:https://events.umich.edu/event/153608
CLASS:PUBLIC
STATUS:CONFIRMED
CATEGORIES:environmental,Ecology,Ecology & Biology,Ecology And Evolutionary Biology,ecosystem,Ecosystems,eeb,Workshop,Environment,Lecture,Research,Science,seminar,Sustainability,Talk
LOCATION:Biological Sciences Building - 1060
CONTACT:
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BEGIN:VEVENT
DTSTAMP:20261013T102924
DTSTART;TZID=America/Detroit:20261203T160000
DTEND;TZID=America/Detroit:20261203T170000
SUMMARY:Workshop / Seminar:EEB Thursday Seminar Series (Hubbell Lecture) - Variable barriers to gene flow across a field cricket hybrid zone
DESCRIPTION:Seminar Summary - Field crickets (Gryllus) in North America were once considered a single “exceedingly plastic species” adapted to local environmental conditions. There are now more than 35 recognized species of North American field cricket and perhaps many more cryptic undescribed species. With a landmark paper in 1979 titled “Speciation in North American Field Crickets”\, Richard Harrison launched decades of classic studies focused on a single hybrid zone between two closely related species of North American field cricket. In this seminar\, I will revisit hypotheses laid out in the classic paper and describe ongoing work to resolve the phylogenetic relationships among North American Gryllus and identify new hybrid zones in this species complex. I will discuss the natural history of Gryllus and the incredible opportunities for integrative and comparative evolutionary research in this group.
UID:153609-21916096@events.umich.edu
URL:https://events.umich.edu/event/153609
CLASS:PUBLIC
STATUS:CONFIRMED
CATEGORIES:evolutionary biology,Workshop,Talk,Science,Research,evolution,environmental,Environment,eeb,Ecosystems,ecosystem,Ecology And Evolutionary Biology,Ecology & Biology,Ecology
LOCATION:Biological Sciences Building - 1060
CONTACT:
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