Latest News : Second Circular Released

Information on Symposia per Science Theme





Theme No.

Theme Title

Number of Symposia proposed

Symposia Title

Symposia Conveners

Biographical sketch of the Conveners

Keywords

Abstract

6

Critical events, mass extinctions and evolution of biosphere


Prof. Vandana Prasad

prasad.van@gmail.com


Prof. Rajeev Patnaik

rajeevpatnaik@gmail.com


Prof. Robert A. Spicer (UK)

r.a.spicer@open.ac.uk

4

At the Open and the Close: Boundary Events of the Palaeozoic Era

Prof. Nigel Hughes, (nigel.hughes@ucr.edu)

(USA)


Prof. Asish R. Basu, (USA)

Dr. Hughes is professor of the Geology at the University of California, Riverside, USA

Neoproterozoic, Cambrian, transition, paleobiogeography, bioevents

Events related to the open and close of the Palaeozoic Era mark major transitions in the trajectory of Earth-Life interaction. The symposium will explore recent discoveries made worldwide that relate to these critical intervals, with an emphasis on studies that combine insights from multiple datasets and approaches, including geochemistry, isotope chemostratigraphy, paleobiology, sedimentology, petrology, and geochronology. As the Indian subcontinent has good records of both these transitions, we particularly encourage perspectives related to tectonomagmatic events associated with the peri-Gondwana margin at these critical times.

Deccan Volcanism and its role in Mass Extinction and Paleobiodiversity

Prof. Gerta Keller, (gkeller@princeton.edu)

(USA)


Prof. N. Malarkodi, (India)

1. Professor in Geology. She is one of the foremost worker on this theme

2. Professor in Geology working on this theme on Indian sediments

Deccan volcanism, KT boundary, Cretaceous, Maastrictian, Mass extinction

Extinction events are important factors in the history of life on Earth, and many studies suggest catastrophic causes for at least some major mass extinctions. Two types of catastrophic event have been invoked: major impacts by asteroids or comets and episodes of continental flood basalt volcanism. Of the five major mass extinctions in Earth’s history, only theCretaceous–Tertiary (K–T) mass extinction has been positivelylinked to an asteroid impact/ continental flood basalts (CFB), Over the past decade continental flood basalts (CFB) have been correlated with most major mass extinctions leading to suggest that this may be the general cause of mass extinctions. The symposium will cover various aspects on Volcanism and its role in Mass extinction and Paleobiodiversity and the key note addresses are arranged besides technical sessions.

Cenozoic Paleoclimate and Ecosystem

1.Prof. Robert Spicer

r.a.spicer@open.ac.uk


2.Torsten Utescher

(Germany)


1.Robert Spicer research focuses on the Quantitative reconstruction of Paleogene and Neogene climate based on CLAMP (Climate leaf analysis)


2.Torsten Utescher is one of the founder member of NECLIME (Neogene climate evolution of Eurasia) His work involves quantitative reconstruction of Neogene climate based on Coexistence analysis of plants.


Paleogene, Neogene, Quaternary, Climate, Biotic proxies

The global climate during the Cenozoic shows a general cooling trend with short abrupt warming periods as revealed by the marine isotopic records. The response time of marine water is always greater than the free air mass on the land surface because of the high specific heat capacity of water. This creates the disparity between land and marine reconstructed palaeoclimate dataset. The quantitative climate reconstruction during the Paleogene and the Neogene based on the biotic proxies are considered as most reliable because they are free from the diagenetic effect and their response time are also very quick. The two techniques such as CLAMP (climate leaf analysis multivariate program) and CA (Co-existence Approach) have been widely used for quantitative estimation of palaeoclimate during the Paleogene and the Neogene. The two aforesaid methodologies have been successfully used in the quantitative reconstruction of land palaeoclimate during the Paleogene and the Neogene climate. The biota during the extreme warming events during the Paleogene also affected severely which can be clearly observed in the floral turnover during the PETM. The symposium invites contributions in this regard.

Evolutionary History, Phylogenetic Studies and Biogeography

1: Dr. Robert Morley

bobmorley100@gmail.com

(UK)


2. Dr. Uma Ramakrishnan

(India)

1. Dr. Robert Morley Consultant biostratigrapher palynologist worked on evolution of tropical rain forest. Produced several papers on plant biogeography particularly on Out of India Hypothesis.

2. Dr. Uma Ramakrishnan

Associate Professor, National Centre for Biological

Sciences, Bangalore, India

Evolution, biogeography, Angiosperm, Molecular phylogeny, Human evolution

Past geodynamic and climatic events have majorly influenced speciation and extinction of biota. Inferring rates of speciation and extinction of biota in response to these historical processes over geological time scales is fundamental to understand diversification of species and biodiversity evolution in deep times. Modern synergized paleobiogeographic approaches will involve integration of fossil data with molecular phylogenetics to understand the evolutionary pattern in deep geological times. In recent years, it has been realized that molecular clocks used in molecular phylogenetics must be calibrated with reliable fossil-data to ascertain when groups and clades of organisms appeared. This symposium invites studies which used fossils and molecular phylogenetic approaches to reveal biogeographic pattern and global diversification of biota