Palaeontologia Electronica Extinction: Evolution and the End of Man
... only large-sized organisms went extinct. He states that size was very important in the extinction event, and gives only the example that large-sized ammonoids and dinosaurs died out. However, there were many smaller forms of these organisms, and they also died out. But why did small mammals survive ...
... only large-sized organisms went extinct. He states that size was very important in the extinction event, and gives only the example that large-sized ammonoids and dinosaurs died out. However, there were many smaller forms of these organisms, and they also died out. But why did small mammals survive ...
The Evolutionary Legacies of the Quaternary Ice Ages
... What Effects did the Quaternary Ice Ages have on Plant Diversity? The Quaternary period is the past 2.7 million years (Myr) of Earth’s history. A time of very marked climatic and environmental changes Large terrestrial ice-caps started to form in the Northern Hemisphere about 2.75 Myr, resulting in ...
... What Effects did the Quaternary Ice Ages have on Plant Diversity? The Quaternary period is the past 2.7 million years (Myr) of Earth’s history. A time of very marked climatic and environmental changes Large terrestrial ice-caps started to form in the Northern Hemisphere about 2.75 Myr, resulting in ...
nova-extinction
... 15. In the ___ - ___ event 65 mill. years ago a mass extinction, mammals survived in the midst of destruction. 16. The house of cards from the last mass extinction fell again. This time it was the _______________ who fell. 17. 35 mill. years ago mammal evolution produced the 1st true _______________ ...
... 15. In the ___ - ___ event 65 mill. years ago a mass extinction, mammals survived in the midst of destruction. 16. The house of cards from the last mass extinction fell again. This time it was the _______________ who fell. 17. 35 mill. years ago mammal evolution produced the 1st true _______________ ...
The Extinction of Darwinism
... modest number of extinctions, although the casualties included such popular favorites as the mammoths and sabre-tooth tigers. It seems that something far outside the ordinary run of environmental hazards is needed to kill enough individuals to threaten a widely distributed species with extinction, a ...
... modest number of extinctions, although the casualties included such popular favorites as the mammoths and sabre-tooth tigers. It seems that something far outside the ordinary run of environmental hazards is needed to kill enough individuals to threaten a widely distributed species with extinction, a ...
Biol
... experiments, Darwin's Finch (on the Galapagos Islands), Darwin's 2 major ideas (variation, offspring survival), microevolution, macroevolution, speciation, adaptive radiation, allopatric speciation, sympatric speciation, genetic isolation Origin of Life/Paleontology (Handouts) origin of life, Miller ...
... experiments, Darwin's Finch (on the Galapagos Islands), Darwin's 2 major ideas (variation, offspring survival), microevolution, macroevolution, speciation, adaptive radiation, allopatric speciation, sympatric speciation, genetic isolation Origin of Life/Paleontology (Handouts) origin of life, Miller ...
Early Humans and Climate
... • Anasazi – 1300 BC to 1300 AD they flourished – But disappeared during time of extreme drought – Or possible, simply over used the available resources • Area was heavily deforested ...
... • Anasazi – 1300 BC to 1300 AD they flourished – But disappeared during time of extreme drought – Or possible, simply over used the available resources • Area was heavily deforested ...
The Human Factor in Evolution
... our species has been associated with the disappearance of species. During the last 10,000 to 100,000 years, a number of large, terrestrial mammals have gone extinct. In North America, 70% (38/54) of the large mammal species went extinct, including: ...
... our species has been associated with the disappearance of species. During the last 10,000 to 100,000 years, a number of large, terrestrial mammals have gone extinct. In North America, 70% (38/54) of the large mammal species went extinct, including: ...
The Emergence of Complex Life
... hunting may have caused mega-faunal extinctions in other regions of the world as well. The evidence is still too thin to say: in particular, the timing of human arrival in North America is still uncertain. Possibly climate change and over-hunting acted in combination, and loss of certain (keystone) ...
... hunting may have caused mega-faunal extinctions in other regions of the world as well. The evidence is still too thin to say: in particular, the timing of human arrival in North America is still uncertain. Possibly climate change and over-hunting acted in combination, and loss of certain (keystone) ...
Quaternary extinction event
The Quaternary period saw the extinctions of numerous predominantly larger, especially megafaunal, species, many of which occurred during the transition from the Pleistocene to the Holocene epoch. However, this extinction wave did not stop at the end of the Pleistocene, but continued, especially on isolated islands, in Holocene extinctions. Among the main causes hypothesized by paleontologists are natural climate change and overkill by humans, who appeared during the Middle Pleistocene and migrated to many regions of the world during the Late Pleistocene and Holocene. A variant of the latter possibility is the second-order predation hypothesis, which focuses more on the indirect damage caused by overcompetition with nonhuman predators. The spread of disease is also discussed as a possible reason.