2 items with the tag “coevolution of life

  • Stoichiometry of Life, Task 3a: Ancient Records - Geologic
    NAI 2009 Arizona State University Annual Report

    The primary goal of this effort is to understand the evolving redox state of the atmosphere and ocean at critical intervals in Earth history, its effect on the availability of bioessential elements, and the consequences for evolution. In support of this goal, a major effort is underway to analyze, at high resolution, ~2.5- to 1.5-billion-year-old drill core samples so that we can better understand the distribution and evolution of early eukaryotic organisms at a variety of spatial and temporal scales. Additional efforts focus on characterizing life and environment leading in to the Cambrian explosion of metazoan life.

    ROADMAP OBJECTIVES: 4.1 4.2
  • Stoichiometry of Life, Task 3a: Ancient Records - Geologic
    NAI 2010 Arizona State University Annual Report

    We are analyzing, at high resolution, Mid-Proterozoic drill core and outcrop samples in an effort to fingerprint the evolving redox state of the atmosphere and ocean at critical intervals in Earth history. This refined view of biospheric oxygenation provides the key backdrop for measuring and inferring abundances of diverse bioessential elements. Within this context we can better understand the distribution and evolution of early eukaryotic organisms at a variety of spatial and temporal scales.

    ROADMAP OBJECTIVES: 4.1 4.2