Although Acheulean toolmaking hominins were able to cope with changing habitats throughout much of the Olorgesailie record, the Acheulean way of life disappeared from the region sometime betweenandyears ago, perhaps also a casualty of strong environmental uncertainty and changing circumstances.
Aroundtoyears ago, the degree of global climate fluctuation increased. My paleoanthropology colleagues were at first split, some embracing it, and others reluctant to include anything new in their teaching. This region may have been much more arid than others, and temperatures changed seasonally between warm and cold.
Isotopic studies done by Dr. Its extant relative, Papio anubis, is omnivorous and moves easily on the ground and in trees. Barbed points were used to spear fish.
Rick Potts studied the pattern of climatic turnover in the fauna and the occurrence of archeological sites at Olorgesailie and another site in southern Kenya, and found that several large mammal species that had previously dominated the fauna of this region went extinct between aboutandyears ago, during a period of repeated environmental instability.
But the evolution of that capacity—the adaptability of the organism—evolves in a population over time. For example, our large brains are useful for processing a wide range of information, our teeth and ability to make tools are useful for consuming a wide variety of foods, our sociability helps us team up with others when our survival is threatened.
However, there is no fossil evidence for language. One example involves baboons. One area that professor Collard finds particularly significant is the development of tools used by hunter-gatherers.
The replacement of the specialized species by closely related animals that possessed more flexible adaptations during a time of wide fluctuation in climate was a key piece of initial evidence that led to the variability selection hypothesis.
We should fit them into this larger picture. The Great Rift Valley is home to many of the most important fossils in early hominin evolution, so Mark Maslina geographer at University College London, studied the valley's paleoclimate record. New Tools for Many Different Purposes Afteryears ago, hominins found new ways of coping with the environment by creating a variety of different tools.
The Expanding World of Early Homo As predicted by the variability selection hypothesis, hominins were not found solely in one kind of habitat, but rather in a variety. In particular, a few large evolutionary leaps, such as bigger brains and complex tool use, seem to coincide with significant climate change.
They used symbols as a means of communicating and storing information. The social bonds that were forged by exchanging materials between groups may have been critical for survival during times of environmental change when one group relied on the resources or territories of a distant group.Did climate change shape human evolution?
in Paleoclimate and Evolution with Emphasis on Human Origins, E. Vrba, G.
Denton, L. Burckle, Climate change and its effects on African ecosystems may have played a key role in human evolution. Share This Article: Copy.
Climate Effects on Human Evolution The idea of variability selection, developed by Smithsonian researcher Dr. Rick Potts, seeks to explain how the dynamic surroundings of human ancestors shaped their ability – and ours – to adjust to a changing world. In other words, humans evolved to live with uncertainty.
Rick Potts at the Smithsonian Institution's Human Origins Program calls this idea “variability selection”, and it’s possible at least two major evolutionary events can be linked to periods of climate instability. But we humans have already proven our ability to survive in an amazing variety of conditions.
How might we evolve in the future to face the new climate reality?
We asked professors of human origins, human evolution and the philosophy of biology, and speculative fiction author Margaret Atwood, to weigh on on our species’ future. agronumericus.com: How is future climate change likely to affect human evolution?
Potts: It is our survival challenge for the future. I think it’s going to present some of the same kinds of challenges our ancestors faced: vastly changed landscapes, and ways of life that may no longer be able to thrive or even exist. Feb 29, · The way that human evolution has historically adapted to climate change and the prevailing environment and the way that modern humans persistently modify their environment and ignore the consequences of changes to the global climate, thus risking the future existance of the human race.Download