UH Manoa Campus Events Calendar
Oceanography SeminarFebruary 14, 3:00pm - 4:15pm
Manoa Campus, MSB 100
Hawai'i Institute of Marine Biology
University of Hawai'i
"Comparative Evolutionary Ecology and Next-Generation Genomics Reveal Patterns of Selection in Deep Sea Urchins and Over-heated Reef Corals"
Abstract: Recent advances in nucleic acid sequencing have brought the full power of genomic analysis into "non-model" systems, and thereby have empowered evolutionary biologists to deeply query systems that pose fundamentally interesting questions about the process of adaptation. In this seminar I will focus on two such systems: first, closely related shallow and deep-sea urchins, and second, reef corals living near their critical thermal thresholds.
First, we compare three Strongylocentrotid urchins, one of which has recently diverged from the ancestral habit of a shallow-water lifestyle, and adapted to survive in the deep sea (~1000 m). Here we ask if adaptation to a novel habitat can leave patterns discernable at the whole-genome scale. We compare thousands of genes across these species (9,258 - 14,543 genes) that differ in stage and tissue-specific expression, and we examine patterns of purifying & positive selection as indicated by patterns of substitution in protein-coding regions. By using traditional non-synonymous/synonymous substitution indices (dN/dS) as well as a maximum likelihood branch-specific model (HYPHY), we show that all species show predictable differences in tissue/stage specific selective constraint, but the recent deep-sea invader shows elevated rates of adaptive evolution. These elevated rates are particularly high in genes associated with biomineralization, a function challenged by the low carbonate saturation environment of the deep sea.
Second, we will explore an on-going research program investigating thermally tolerant reef corals in American Samoa. Here we will first cover spatial patterns of thermally resistant coral symbionts both locally in a back-reef pool system and across the Indo-Pacific. Then we will turn to experimental evidence of elevated thermal tolerance associated with both hosting such symbionts, and acclimatization to high-temperature habitats. Finally we will turn to whole-transcriptome expression data highlighting the apparent mechanism behind this acclimatization - front-loading of stress mitigating genes.
Oceanography, Manoa Campus
|Thursday, February 14|
Timpuyog's Valentine Bake Sale
Manoa Campus, McCarthy Mall, in between Webster Hall and the Art Building
Condom Fair 2013
Manoa Campus, Campus Center
Pacific Connections Seminar Series
Manoa Campus, 3121/3125 John Burns Hall (East-West Center)
The Making of The Glades Project
Manoa Campus, 325 Henke Hall
Special Microbiology / Biology Seminar
Manoa Campus, Biz Ad A101
One Billion Rising at UHM
Manoa Campus, Campus Center, 2500 Campus Road
Political Science Final Oral
Manoa Campus, Saunders 624
Stephen Wilcox, baritone
Manoa Campus, Orvis Auditorium
Manoa Campus, MSB 100
Chess Club at UH Manoa Meeting
Manoa Campus, Campus Center Room 310
- Highlighted dates have scheduled events.
- Select the date to view all events for that day.
- Scholarships Available!
- Lineage : A Family Tree of Printmakers
- Arts Exhibition: Ainu Treasures: A Living Tradition in Northern Japan
- SAPFB Fall 2013 Funding Applications Available
- Picturing the Ryukyus: Images of Okinawa in Japanese Artworks from the UH Sakama
- What's Love Got to Do With It? Confronting Domestic Violence, Creating Justice
- East-West Center 12th International Graduate Student Conference