IISER Mohali, Knowledge city, Sector 81, SAS Nagar, Manauli PO 140306

Impact of Quaternary glacial cycles on biotic diversification

Dr. Kritika Garg, Faculty Fellow, Ramalingaswami Fellow, Centre for Interdisciplinary Archaeological Research, and Department of Biology, Ashoka University, Sonipat, Haryana, India

Zoom Link

Location : Online
Abstract: The past 2.6 million years, earth has undergone periodic cycles of cooling and warming. Known as the Quaternary glacial cycles, these periodic fluctuations in global climate have been responsible for biotic diversification across the globe. During the cooling phase of the glacial cycles, water is locked up as ice at the poles, leading to a drop in sea levels and the formation of land bridges across islands. These land bridges allow for gene flow between isolated island populations and can have a varied impact on demography and speciation patterns, depending on the species biology. In this talk, I will discuss the impacts of the Quaternary glacial cycles on gene flow and divergence of two understory babblers commonly found across the forests of Southeast Asia. We leverage the important museum collections of these babblers from remote islands in Southeast Asia to understand the genomic affinity of these isolated populations. Our analyses suggest that Quaternary land bridges and paleo-rivers shape the population structure of birds on the remote islands in Southeast Asia. In addition, I will discuss my future research program that aims to understand the impact of these Quaternary glacial cycles on the biota present in the Indian subcontinent using a combination of historic museum and ancient sedimentary cores. Finally, I will also discuss my teaching philosophy and teaching plans.

Meeting ID: 978 4763 1745
Passcode: 972329
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