Related Experiment Video
Updated: Jun 12, 2026

07:57
Sampling and Pretreatment of Tooth Enamel Carbonate for Stable Carbon and Oxygen Isotope Analysis
Published on: August 15, 2018
Comment on the paleoenvironment of Ardipithecus ramidus
Thure E Cerling1, Naomi E Levin, Jay Quade
1Department of Geology and Geophysics, University of Utah, Salt Lake City, UT 84112, USA. thure.cerling@utah.edu
Summary
Paleoenvironmental studies of Ardipithecus ramidus suggest a woodland habitat. However, new findings indicate a more open tree- or bush-savanna environment with limited woody canopy cover.
Area of Science:
- Paleoanthropology
- Paleoecology
Background:
- Previous research by White and colleagues suggested Ardipithecus ramidus inhabited woodland to forest patch environments at Aramis, Ethiopia.
- This characterization was based on their paleoenvironmental analysis of the region.
Discussion:
- This study challenges the previous interpretation, presenting evidence for a tree- or bush-savanna environment.
- The proposed environment is characterized by significantly less woody canopy cover, estimated at 25% or less.
Key Insights:
- The paleoenvironment of Ardipithecus ramidus at Aramis is re-evaluated.
- Findings suggest a more open savanna habitat rather than dense woodlands.
Outlook:
- Further research can refine the understanding of Ardipithecus ramidus's ecological niche.
- This revised environmental context may impact interpretations of hominin evolution and dispersal.
Related Concept Videos
Global Climate Change
Throughout its ~4.5 billion year history, the Earth has experienced periods of warming and cooling. However, the current drastic increase in global temperatures is well outside of the Earth’s cyclic norms, and evidence for human-caused global climate change is compelling. Paleoclimatology, the study of ancient climate conditions, provides ample evidence for human-caused global climate change by comparing recent conditions with those in the past.
The Fossil Record
The fossil record documents only a small fraction of all organisms that have ever inhabited Earth. Fossilization is a rare process, and most organisms never become fossils. Moreover, the fossil record only exhibits fossils that have been discovered. Nevertheless, sedimentary rock fossils of long-lived, abundant, hard-bodied organisms dominate the fossil record. These fossils offer valuable information, such as an organism's physical form, behavior, and age. Studying the fossil record helps...
Diversity of Archaea II
Archaea, one of the three domains of life, exhibit remarkable diversity and adaptability, thriving in both extreme and moderate environments. Historically, most identified archaea have been classified into two major phyla: Euryarchaeota and Crenarchaeota. However, recent molecular studies have expanded this classification to include three additional phyla: Thaumarchaeota, Nanoarchaeota, and Korarchaeota, each exhibiting unique characteristics and ecological roles.Thaumarchaeota: Mesophiles...
Diversity of Archaea III
Crenarchaeota, a prominent phylum of Archaea, is remarkable for its ability to thrive in extreme environments characterized by high temperatures and acidity. These microorganisms inhabit sulfuric hot springs, volcanic systems, and submarine hydrothermal vents, where temperatures often exceed 100°C. The unique adaptations of Crenarchaeota not only allow survival under such extreme conditions but also provide insights into the mechanisms of life in primordial Earth-like environments.Morphological...
What is Evolutionary History?
Scientists record evolutionary history by analyzing fossil, morphological, and genetic data. The fossil record documents the history of life on Earth and provides evidence for evolution. However, both fossil and living organisms offer evidence that outlines Earth’s evolutionary history.Phylogenetic trees illustrate the evolutionary relationships among these organisms. Scientists infer organisms’ common ancestry by evaluating shared morphological and genetic characteristics. Together, the fossil...
Overview of Archaea
Archaea, named after the Archaean eon, represent a unique domain of life, distinct from bacteria and eukaryotes, with remarkable traits. Their cellular and molecular features, ecological adaptability, and industrial relevance highlight their importance in understanding life processes and leveraging biotechnology.Cellular and Molecular CharacteristicsA defining feature of archaea is their unique membrane composition. Archaeal membranes contain ether-linked isoprenoid lipids, which confer...

